SIPAN 32 and 34 - S-engineeringse.ua/eng/pdf/kip3/sipan/Converters_SIPAN.pdf · •Steam generation...

Core capabilities.

Wastewater.

Made-to-measure solutions for

wastewater analysis in the

municipal and industrial sectors.

Drinking water.

Assured safety — analysis for

suppliers and consumers.

Process water.

Process and laboratory analysis for

special analytical problems and

production conditions.

HACH LANGE services.

Ordering, information and advice: [email protected]

Seminars and workshops: further training and exchange ofexperience for analysis in practice.

On-site support by our technicalfield staff.

Quality assurance, complete withstandard solutions, instrument checksand test solutions.

www.hach-lange.com up to date and secure, with downloads,information and shop.

Assurance of legal compliance, togetherwith environmental protection throughcollection of used reagents.

Reliable operation of all instrumentsthanks to flexible service andmaintenance contracts.

Regular customer information by postand email.

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HACH LANGE GMBHWillstätterstraße 11D-40549 DüsseldorfTel. +49 (0)2 11 52 88-0Fax +49 (0)2 11 52 [email protected]

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CATALOG

PROCESS MEASUREMENT TECHNOLOGY

SIPAN LIQUID ANALYSIS

SIPAN 32 and 34Controllers and Sensors for pH, Conductivity and O2

Welcome to HACH LANGE!

Now you have the new SIPAN catalog.

Liquid analyzers of the SIPAN series for continuous

measurement of pH value/redox potential, conductivity

and dissolved oxygen supply important data to

process control systems or process control devices.

HACH LANGE is the market leader for Liquid Analytics

in the Water/Waste water sector. With product characteristics

such as explosion protection, etc. SIPAN products will ideally

complement the existing HACH LANGE product lines to an even

more extensive product range.

Whether field or laboratory analysis, samplers or process

measurement technology, HACH LANGE stands for the total

spectrum of water analysis - from visual methods to comprehensive

systems of reagents, measurement technology and accessories.

Solutions from HACH LANGE are tailor-made for every application

in wastewater, drinking water or process water - for reliable

control of operational processes and monitoring of legally prescribed

limit values.

HACH LANGE stands for water analysis from a single source.

For you, this means more products and applications, more experience

and on-site support than ever before

Your water-analysis team at

HACH LANGE

2 Analyzer for ConductivitySIPAN 32 and SIPAN 32XSIPAN 34

3 Analyzer for pH Valueand Redox Potential

SIPAN 32 and SIPAN 32XSIPAN 34

4 Analyzer for Dissolved OxygenSIPAN 32 and SIPAN 32XSIPAN 34

Table of contentsLiquid Analysis

Ch

ap

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HACH LANGE

2/2 Overview

2/2 Benefits

2/2 Application

2/4 Design

2/5 Function

2/9 Technical data

2/11 Ordering data

2/12 Dimensional drawings

2/13 Schematics

Analyzer for ConductivitySIPAN 32 and SIPAN 32X

HACH LANGE2/2

Liquid Analysis

SIPAN 32 and SIPAN 32X

Analyzer for Conductivity

Flüssigkeitsanalysengeräte

Overview

The SIPAN 32 and SIPAN 32X measuring equipment is designed todetermine the electric conductivity of aqueous or organic solutions.

SIPAN 32 for conductivity

Benefits

Usefulness of SIPAN 32 and SIPAN 32X

• Two-wire connection

• Sensor diagnosis for temperature measurement

• Automatic measured-value hold at calibration

• Logbook to document all important events

• Local control following NAMUR

• PROFIBUS PA or HART communication available

• Available as Ex variant (EEx ib [ia])

• Field housing IP65

• Second, passive output, freely parameterizable (for temperature (analog) or pre-warning/purging function/limit (binary)).

Application

The conductivity measuring range extends over 8 powers of ten from ultra-pure water (approx. 0.040 µS/cm) up to very high con-ductivities (approx. 2500 mS/cm).

This wide range is covered by three measuring procedures (see Fig.):

• the two-electrode procedure (2EL sensor),

• the four-electrode procedure (4EL sensor) and

• the inductive procedure (IND sensor).

The measuring ranges as well as the fields of application of the three procedures overlap to a certain extent.

SIPAN 32 and SIPAN 32X measuring equipment, selection table according to fields of application

HACH LANGE 2/3

Liquid AnalysisAnalyzer for Conductivity


Twoelectrode procedure (2EL sensor)

The two-electrode procedure (2EL sensor) is used to measure the conductivity of ultra-pure water and highly diluted aqueous solutions from

0.04 µS/cm to 25 000 µS/cm

where contamination and deposits on the electrodes extendinginto the measured medium are not expected (higher conductiv-ities - above 5 000 µS/cm - lead to polarization effects and thusto errors in measurement).

Media with conductivities < 5 µS/cm (VE water, ultra-pure water) exhibit a distinct non-linear temperature dependence. The analyzer is therefore provided with a temperature compensation function for ultra-pure water.

Applications

• Steam generation (boiler feedwater, condensation)

• Semiconductor manufacture (ultra-pure water, chip cleaning)

• Water processing (reverse osmosis, ion exchanger)

• Leak testing of heat exchangers

• Drinking water and surface water.

Product characteristics

• Measurement of very small ranges (< 0.1 µS/cm) by using stain-less steel sensors resistant to pressure and corrosion with a con-centric electrode arrangement, with integrated thermom-eter

• Calibration of measurement is unnecessary for 2EL concentric sensors (even following replacement of sensor); if needed, a temperature calibration has to be carried out

• Low price for stainless steel pin electrodes with plastic shaft with or without temperature compensation for measuring ranges ≥ 2 µS/cm

• Compact electrode, as combination with a pH/redox measure-ment in one fitting

• All versions of the two-electrode sensors with explosion protec-tion for zone 1.

Fourelectrode procedure (4EL sensor)

The four-electrode procedure is used in media of average conduc-tivity from

0.01 mS/cm to 500 mS/cm.

The advantages of this procedure are the insensitivity of the sen-sor towards contamination and the avoidance of polarization errors.

In addition to output of the conductivity, it is also possible to out-put a display in percentage by weight following automatic con-version.

Applications

• Municipal and industrial sewage treatment plants

• Service water and waste water

• Drinking water purification

• Cooling water

• Determination of concentrations of brines, alkalis and acids

• Monitoring of concentrates

• Bleaching and washing baths.


• Four concentric ring electrodes - potted level with the shaft - thus particularly resistant to contamination

• Automatic compensation of contamination

• Sensors with integrated thermometer for automatic temperature compensation

• Particularly compact design possible even in combination with a pH/redox measurement.

Inductive procedure (IND sensor)

The inductive procedure can be used to measure the conductivity of small to very high values from

1 µS/cm to approx. 2 500 mS/cm.

This procedure is particularly suitable for the measurement of cor-rosive media since there is no direct contact between the elec-trodes and the medium.

In addition to output of the conductivity, it is also possible to output a display in percentage by weight following automatic conversion (determination of concentration).

Applications

• Determination of concentrations of brines, alkalis and acids, in particular sulphuric acid and oleum

• Corrosive industrial waste water

• CIP control

• Regeneration of concentration

• Phase separation of product/water mixtures

• Product monitoring in filling and cleaning plants.


• Extremely wide dynamic range (> 106) with one type of sensor

• Three types of sensor manufactured from the high-tech polymer PEEK with integrated thermometer and with special leak tight-ness of sensor and thermometer since moulded from one piece. Permanent overload capacity 10 bar at +130 °C

• FEP sensor with large wall thickness for measurements in highly concentrated acids and alkalis

• DURAN glass sensor absolutely resistant to diffusion in hot, su-per-saturated acids (oleum), resistant to organic solvents, with in-tegrated thermometer

• Some versions with explosion protection for zone 1.

HACH LANGE2/4

Liquid Analysis



Design

SIPAN 32 and SIPAN 32X analyzers, mode of operation

The SIPAN 32 and SIPAN 32X measuring equipment consist of:

• a sensor

• a flow, immersion or replacement fitting

• a temperature sensor (Pt1000 or Pt100)

• a SIPAN 32 or SIPAN 32X analyzer.

SIPAN 32 and SIPAN 32X are analyzers of the new two-wire gen-eration with state-of-the-art micro-power technology with micro-processor control and multi-segment display.

They contain the analog and digital data processing functions, depending on the version, for the signal delivered by the sensor.

The SIPAN 32 and SIPAN 32X analyzers are available in field housings.

A SIPAN 32 or SIPAN 32X analyzer can be parameterized for all measuring ranges.

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HACH LANGE 2/5



Measuredvalue processing

The signals delivered by the analog input amplifiers are processed into a temperature-compensated value by the digital data process-ing function.

Conductivity

With all three measuring procedures (2EL, 4EL and IND), a square-wave or sine-wave AC voltage is applied to the sensors. The mag-nitude and frequency depend on the measuring procedure. The current output by the sensor is a measure of the conductivity of the medium.

Temperature compensation

Either Pt100 or Pt1000 thermometers can be connected to the analyzers. The measurement is designed as a two- or three-wire system. The type of thermometer connected is recognized auto-matically.

Functions

Function

Measuring procedure for conductivity measurements

The conductivity of liquids is based on the electrolytic dissociation of acids, bases or salts in water into electrically charged particles (ions).

The magnitude of the electrical conductivity K is the reciprocal value of the electric resistance of the solution.

The dimension for electric conductivity is S/m (Hach Lange per meter).

The conductivity of a dilute electrolyte solution depends on:

• The number of ions in the solution, i.e. its concentration

• The number of unit charges capable of being transported by each ion, i.e. the ion charge number

• The migration velocity or mobility of the ions.

The conductivity of an electrolyte is a linear function of the concen-tration at a constant temperature since the valency - and also the ion mobility in dilute aqueous solutions - remain constant.

Examples of the dependence of conductivity on the concentration are shown in the figure.

Conductivity of dilute solutions at 18 °C

The total conductivity of a solution is the sum of the conductivities of all ion pairs present in the solution and is thus usually a non-spe-cific variable.

In practice, however, the concentration of a component can be de-termined directly from the conductivity of a solution if

• only one substance is present in the solution

• all constituents of the solution change in approximately the same ratio

• the variation of one constituent of the solution compared to that of the others is so predominant that it alone practically determines the conductivity.

In the case of concentrated solutions of electrolyte there is usually no linear relationship between the conductivity of the solution and the concentration of the electrolyte. The conductivity frequently de-creases as the concentration increases since the degree of disso-ciation drops on the one hand and the ion mobility is reduced on the other because of inter-ionic interactions.

A concentration measurement can nevertheless be carried out if it is only made in a reliable range, i.e. where the conductivity either rises or falls. This assumes that the relationship between conduc-tivity and concentration of the electrolyte is known.

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HACH LANGE2/6

Liquid Analysis



Conductivity of concentrated solutions at 18 °C

The conductivity of electrolytes is highly temperature-dependent since both the number of dissociated modules and the ion mobility are highly temperature-dependent. A reference temperature of 25 °C is therefore selected and the measured conductivity values are corrected accordingly using the temperature coefficient α.

The temperature coefficient α depends on

• the composition of the electrolyte solution

• the concentration of the solution.

Values from 1 to 6%/K are possible.

The figure shows that the resistance depends non-linearly on the temperature for an NaCl solution.

Dependence of the resistance of an NaCl solution on the temperature at var-ious concentrations

Three different measuring procedures enable measurement of the conductivity individually adapted to the task and the concentra-tion of the electrolyte:

• Two-electrode procedure

• Four-electrode procedure

• Inductive procedure without electrodes.

The conductivity measuring equipment consists of the following basic components:

• Conductivity sensor

• Temperature sensor to compensate the influence of tempera-ture

• Analyzer.

Twoelectrode procedure

A square-wave AC voltage is applied to the two current elec-trodes. The current flowing through the solution is inversely pro-portional to the electrical resistance and directly proportional to the conductivity.

Two-electrode procedure, mode of operation

Fourelectrode procedure

A square-wave AC voltage is applied to two current electrodes.The four-electrode procedure uses two current electrodes and two volt-age electrodes. A square-wave AC voltage is applied to the current electrodes, and the current flowing through the solution is inversely proportional to the electrode resistance and directly proportional to the conductivity. The AC voltage is measured at the voltage elec-trodes and used to control the output voltage at the current elec-trodes. The generation of a deposit on the sensors is thus taken into account and compensated.

Four-electrode procedure, mode of operation

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HACH LANGE 2/7



Inductive procedure

The sensor consists of two coils which are positioned on toroidal tape cores. The primary coil is driven by a sinusoidal AC voltage. An AC voltage is induced in the liquid loop (= measured me-dium) which constitutes the secondary winding of this "trans-former". In the case of electrically conducting liquids, a current flows which is proportional to their conductivity. The liquid loop is simultaneously the primary winding of the secondary coil which operates as a current transformer. This current is rectified in-phase and amplified.

Inductive procedure, mode of operation

Special characteristics of SIPAN 32

• Two-wire analyzer with state-of-the-art micropower technology

• Extremely simple field installation with only two wires

• Menu-based operation with understandable symbols (based on IEC)

• Complete local operation with directly accessible keypad with 8 keys and large, clearly-arranged multi-segment display

• Display of S/cm, mS/cm, µS/cm, µS/m, MΩcm, kΩcm, % w/w, H2SO4, oleum, HNO3, HCl, HBr, NaOH, NaCl, KOH

• Direct output of concentration values instead of conductivity (19 stored material tables)

• All measuring procedures 2EL, 4EL and IND are available

• Additional permanent temperature display selectable in °C or °F

• Logbook with entry of faults or calibration procedures with date and time

• Non-linear ultra-pure water temperature compensation for con-ductivity

• Automatic HOLD function

• Comprehensive fault diagnosis system

• 3 operating levels with coded protection for monitoring, routine and specialists

• Selectable tests for display, keys, RAM, EPROM and EEPROM

• Output of defined current values for test purposes

• Maximum electromagnetic compatibility according to CE and NA-MUR, sensitive lightning protection

• Robust field housing (IP65/NEMA 4X) with four cable screwed glands for easy connection

• There are three SIPAN 32 and SIPAN 32X analyzers, each avail-able for the 2EL, 4EL and IND procedures.

Special characteristics of SIPAN 32X

• Intrinsic safe operation

• Analyzers with type of protection "Increased intrinsic safety" EEx ib[ia] can be used within the potentially explosive atmo-spheres (zone 1, CENELEC).

Product characteristics of SIPAN 32, communicationvariants

Device with 4 ... 20 mA output

• Electrical isolation (test voltage 500 V AC)

• Output signal 4 to 20 mA

• Fault or limit output > 20 mA

• Optional second passive output, freely-parameterizable as addi-tional current output, for temperature or second measured value or contact for flushing function or limit or warning (pre-alarm).

Device with 4 ... 20 mA output and HART communication

• Completely parameterizable from control system via only one two-wire cable

• Additional communication via handheld communicator or PC


• Fault or limit output > 20 mA (additional digital status transmis-sion via HART protocol)

• Central access from control system (OS, ES) to any field device using the SIEMENS PCS 7 control system

• Uniform operator control and monitoring of all field units (inclusive linked host units) when using SIMATIC PDM


Device with PROFIBUS PA communication

• SIPAN 32 PA with bus connection to IEC 61158-2 and EN 50170, Part 4

• Fixed bus current limitation in case of fault

• Data transmission and device supply via common bus connection

• Communication via PROFIBUS PA (Profile B, Version 3.0); thereby all settings completely parameterizable (two synchronous measured values, measuring range, limits, sensor diagnostic, op-eration simulation, etc.)

• Quality indication to the measured values: status with limits

• Full measured-value dynamics (discontinuation of measured-range parameters)

• Central access from control system (OS, ES) to each field device using the SIEMENS PCS 7 control system


• Possibility of a further diagnosis with increased disponibility of plant parts

• Savings of installation costs

• Interoperability (replacement with parameter conservation possi-ble)

• Possibility of automatic tracking of the plant documentation

• Possibility of plant optimizing during operation.

Parameter sets (option)

The analyzer has four parameter sets for four methods that can be set independently from each other. This allows an optimal adapta-tion in a process when different media have to be measured. Switchover to the correspondent parameter set can be controlled externally (via HART or PROFIBUS PA).

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HACH LANGE2/8

Liquid Analysis



SIPAN 32, SIPAN 32X analyzer, display and control panel

HACH LANGE 2/9



Technical data

Display

• Measured value Four 16-mm digits

• Temperature Four 8-mm digits

• Text display Five digits

• Others Symbol displays

• Input display Symbols

Coding 3 coding levels for operations (dis-play level, user level, specialist level)

Unit µS/cm, mS/cm, S/cm, µS/m, mS/m, S/m, MΩcm, kΩcm, % w/w

Measuring range observe technical data of sensors

Measuring span (expansion) Any, but at least 10% of smallest measuring range

Output range Optionally selectable between 0 and maximum full-scale value

Measuring range for temperature -50 ... +200 °C, -60 ... +400 °F

Measuring span for temperature Any, but at least 10% of smallest measuring range

Temperature compensation with con-ductivity measurements

Linear TC value, 0 to 10%/K or non-linear response (max. 5 char-acteristics), 2 characteristics defined as standard for ultra-pure water and beer

Temperature compensation with% w/w

Conductivity tables stored for H2SO4, oleum, HNO3, HCl, HBr, NaOH, KOH, NaCl

Error limits

• with conductivity measurement < 2.0% of measuring range (at rated conditions)

• with temperature compensation < 0.5% of measured value (for pure liquids)

Influencing effects on measured value

According to DIN IEC 746, Part 1

• Repeatability <0.2% of full-scale value

• Linearity <0.5% of full-scale value

• Ambient temperature <0.2%/10 K

• Power supply <0.1%

• Load <0.1%/100 Ω

• Zero error <0.2% of full-scale value

Output signal 4 to 20 mA linear to measured value or bilinear to measured value (2 linear partial ranges with a knee at 12 mA), electrically isolated from sensor

Max. permissible load in Ω R = (U [power supply] -14) V/0.02 A

Power supply 14 V ... 30 V DC, 0.8 W, protection class II (field housing)

Logbook Automatic recording of warning and failure messages with date and time, 20 entries with overflow, non-erasable

Data storage >10 years (EEPROM)

Device self-test Testing of RAM, EPROM, EEPROM, display, keyboard, data can be called on display

Clock Software clock

Identification CE marking

Temperature and mechanical stress

• Operation DIN EN (IEC) 60721-3-3

- Temperature -20 °C ... +70 °C corresponds to 3K6 but lowest temperature –20 °C without condensation

- Mechanical stress 3M2

• Storage DIN EN (IEC) 60721-3-1

- Temperature -25 °C ... +70 °C corresponds to 1K4


• Transport DIN EN (IEC) 60721-3-2



Water protection DIN EN (IEC) 60529, IP65 for field devices

EMC DIN EN (IEC) 61326 and NAMUR NE 21

Electrical safety DIN EN (IEC) 61010-1

Quality assurance system DIN ISO 9001/EN 29000

Material of field housing Macrolon (polycarbonate + 20% glass fiber)

Permissible relative humidity 10 ... 95%, no condensation

Electrical isolation Input and output are isolated

Test voltage 500 V AC, 50 Hz, 1 min

Weight 2.5 kg

HACH LANGE2/10

Liquid Analysis



Programmed data of measured medium in SIPAN 32 for theconcentration display (the possible measuring ranges are maximum in-dications and are influenced by the temperature)

Linear and bent characteristics in SIPAN 32 analyzer

Options

2nd passive analog output 0/4 to 20 mA linear to temperature, or contact for flushing function or limit or warning (pre-alarm)

SIPAN 32X with explosion protection

Explosion protection to ATEX Guide-line 94/9/EC, DIN EN 50014 and DIN EN 50020

Type of protection “Intrinsic safety”, II (1) 2 G EEx ib[ia] IIC T4

Permissible ambient temperature during operation

20 ... +60 °C

Output signal circuit With type of protection Intrinsic safety only for connection to certi-fied intrinsically-safe circuits with the following maximum values: Ui = 30 V, Ii = 100 mA, Pi = 750 mW, Ri = 300 Ω

Measured medium

Temperature range °C

Possible measuring ranges % w/w

H2SO4 -20 ... +120 0 ... 3432 ... 8592 ... 99.5

Oleum +10 ... +120+10 ... +60

12 ... 4560 ... 70

HNO3 -20 ... +55

0 ... +100

0 ... 3034 ... 8592 ... 95

0 ... 12

HCl -20 ... +55

0 ... +100

0 ... 1624 ... 42

0 ... 12

NaOH 0 ... +100 0 ... 2618 ... 32

NaCl 0 ... +100 0 ... 26

KOH 0 ... +100 0 ... 3432 ... 42

HBr -20 ... +55 0 ... 3039 ... 52

Communication

Option HART PC/laptop or HART communicator with SIPAN 32 and SIPAN 32X analyzer

Load with connection of HART modem

250 ... 500 Ω

Load with connection of HART com-municator

250 ... 500 Ω

Line Two-wire, screened: ≤ 1.5 km

Protocol HART, version 5.1

Option PROFIBUS PA

Power supply, bus voltage Supplied by bus, 9 to 32 V (non Ex), 9 to 24 V for intrinsically safe operation

Power consumption of the unit I = 13 mA ± 1 mA

• Max. current increase in case of er-ror

I + 3 mA (electronic current limita-tion) (Imax. = 16 mA)

I + 27 mA (additional fuse) (Imax. = 40 mA)

• Communication PROFIBUS PA (IEC 61158 CPF3 CP3/2)

Physical bus: IEC 61158-2 MBP(-IS)

Polarity independent

• C2 connection 4 connections to Master Class 2 are supported

• Unit profile PROFIBUS PA, Profile B, Version 3.0

• Unit address 126 at delivery

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HACH LANGE 2/11



Certificate according to DIN 55350-18-4.1.1 for SIPAN analyzer on request.

Please order together with the analyzer in cleartype.

Ordering data Order No.

SIPAN 32 analyzertwowire system, for conductivity measurement

Measuring procedure:

Twoelectrode procedure (2EL)

Fourelectrode procedure (4EL)

Inductive procedure (IND)microprocessor-controlled, membrane keyboard with LC display, menu control, logbook, concentration display, temperature compensation, 1 parameter set, in field housing

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1 signal output: 4 to 20 mA,with HART interface

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2 signal outputs,with HART interface:• 1st signal output: measured value 4 to 20 mA• 2nd, passive signal output: 0/4 to 20 mA

temperature or switching function for limit or flushing or warning

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PROFIBUS PA, 4 parameter sets D

Order No.

Isolating power supply

(see FI 01, Part 6, for technical data)

HART version with Ex protection EEx ia IIC, Smart, with 24 V DC power supply, p.c.b., single locking

7NG41221AA10

HART version with Ex protection EEx ia IIC, Smart, with 95-253 V AC power supply, compact subas-sembly, DIN rail mounting

7NG41221BA10


SIPAN 32X analyzer with Ex protection, intrinsicallysafe version, II (1) 2G EEx ib [ia] IIC T4,twowire system, for conductivity measurement

Measuring procedure:

Twoelectrode procedure (2EL)

Fourelectrode procedure (4EL)

Inductive procedure (IND)microprocessor-controlled, membrane keyboard with LC display, menu control, logbook, concentration display, temperature compensation, 1 parameter set, in field housing

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Accessories/mounting material

Order No.

For mounting the analyzer or the isolating block on a pipeline

Protective hood (SS, type No. 1.4571) with base plate

C79451A3177D12

Pipe clamp (SS, type No. 1.4571) 7MA85008DG

Base plate (SS, type No. 1.4571) C79451A3177D11

2/12 HACH LANGE

Liquid Analysis



Dimensional drawings

SIPAN 32 analyzer, dimensions in mm

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Schematics

SIPAN 32 or SIPAN 32X analyzer, electric connections

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HACH LANGE2/14

Liquid Analysis



Communication between SIPAN 32 with HART modem and PC

HACH LANGE

2/16 Overview

2/16 Benefits

2/16 Application

2/18 Design

2/19 Function

2/23 Technical data

2/25 Ordering data


2/28 Schematics

Analyzer for ConductivitySIPAN 34

HACH LANGE2/16

Liquid Analysis

SIPAN 34



Overview

The SIPAN 34 measuring equipment is designed to determine the electric conductivity of aqueous or organic solutions.

SIPAN 34 for conductivity

Benefits

Usefulness of SIPAN 34

• Four-wire connection

• Sensor diagnosis for temperature measurement





• Panel housing IP54

• Second output for temperature (option)

• Three programmable relays.

Application

The conductivity measuring range extends over 8 powers of ten from ultra-pure water (approx. 0.040 µS/cm) up to very high con-ductivities (approx. 2500 mS/cm).

This wide range is covered by three measuring procedures (see Fig.):

• the two-electrode procedure (2EL sensor),

• the four-electrode procedure (4EL sensor) and

• the inductive procedure (IND sensor).

The measuring ranges as well as the fields of application of the three procedures overlap to a certain extent.

SIPAN 34 measuring equipment, selection table according to fields of application

HACH LANGE 2/17


SIPAN 34

Twoelectrode procedure (2EL sensor)

The two-electrode procedure (2EL sensor) is used to measure the conductivity of ultra-pure water and highly diluted aqueous solutions from

0.04 µS/cm to 25 000 µS/cm

where contamination and deposits on the electrodes extendinginto the measured medium are not expected (higher conductivi-ties - above 5 000 µS/cm - lead to polarization effects and thusto errors in measurement).

Media with conductivities < 5 µS/cm (VE water, ultra-pure water) exhibit a distinct non-linear temperature dependence. The ana-lyzer is therefore provided with a temperature compensation function for ultra-pure water.

Applications

• Steam generation (boiler feedwater, condensation)

• Semiconductor manufacture (ultra-pure water, chip cleaning)

• Water processing (reverse osmosis, ion exchanger)

• Leak testing of heat exchangers

• Drinking water and surface water.


• Measurement of very small ranges (< 0.1 µS/cm) by using stain-less steel sensors resistant to pressure and corrosion with a con-centric electrode arrangement, with integrated thermometer

• Calibration of measurement is unnecessary for 2EL concentric sensors (even following replacement of sensor); if needed, a tem-perature calibration has to be carried out

• Low price for stainless steel pin electrodes with plastic shaft with or without temperature compensation for measuring ranges ≥ 2 µS/cm

• Compact electrode, as combination with a pH/redox measure-ment in one fitting.

Fourelectrode procedure (4EL sensor)

The four-electrode procedure is used in media of average conduc-tivity from

0.01 mS/cm to 500 mS/cm.

The advantages of this procedure are the insensitivity of the sensor towards contamination and the avoidance of polarization errors.

In addition to output of the conductivity, it is also possible to output a display in percentage by weight following automatic conversion.

Applications

• Municipal and industrial sewage treatment plants

• Service water and waste water

• Drinking water purification

• Cooling water

• Determination of concentrations of brines, alkalis and acids

• Monitoring of concentrates

• Bleaching and washing baths.


• Four concentric ring electrodes - potted level with the shaft - thus particularly resistant to contamination

• Automatic compensation of contamination

• Sensors with integrated thermometer for automatic temperature compensation

• Particularly compact design possible even in combination with a pH/redox measurement.

Inductive procedure (IND sensor)

The inductive procedure can be used to measure the conductivity of small to very high values from

1 µS/cm to approx. 2 500 mS/cm.

This procedure is particularly suitable for the measurement of cor-rosive media since there is no direct contact between the elec-trodes and the medium.

In addition to output of the conductivity, it is also possible to output a display in percentage by weight following automatic conversion (determination of concentration).

Applications

• Determination of concentrations of brines, alkalis and acids, in particular sulphuric acid and oleum

• Corrosive industrial waste water

• CIP control

• Regeneration of concentration

• Phase separation of product/water mixtures

• Product monitoring in filling and cleaning plants.


• Extremely wide dynamic range (> 106) with one type of sensor

• Three types of sensor manufactured from the high-tech polymer PEEK with integrated thermometer and with special leak tight-ness of sensor and thermometer since moulded from one piece. Permanent overload capacity 10 bar at +130 ºC

• FEP sensor with large wall thickness for measurements in highly concentrated acids and alkalis

• DURAN glass sensor absolutely resistant to diffusion in hot, su-per-saturated acids (oleum), resistant to organic solvents, with integrated thermometer.

HACH LANGE2/18

Liquid Analysis

SIPAN 34


Design

SIPAN 34 analyzer, mode of operation

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HACH LANGE 2/19


SIPAN 34

SIPAN 34 are analyzers of the new four-wire generation with state-of-the-art micro-power technology with microprocessor control and multi-segment display.

The SIPAN 34 analyzer is optionally available with special features for process use.

It contains the analog and digital data processing functions for the signal delivered by the sensor.

A SIPAN 34 analyzer can be parameterized for all measuring ranges.



Conductivity

With all three measuring procedures (2EL, 4EL and IND), a square-wave or sine-wave AC voltage is applied to the sensors. The mag-nitude and frequency depend on the measuring procedure. The current output by the sensor is a measure of the conductivity of the medium.


Either Pt100 or Pt1000 thermometers can be connected to the analyzers. The measurement is designed as a two- or three-wire system. The type of thermometer connected is recognized auto-matically.

Functions

Function

Measuring procedure for conductivity measurements

The conductivity of liquids is based on the electrolytic dissociation of acids, bases or salts in water into electrically charged particles (ions).

The magnitude of the electrical conductivity K is the reciprocal value of the electric resistance of the solution.

The dimension for electric conductivity is S/m (Siemens per meter).

The conductivity of a dilute electrolyte solution depends on:

• The number of ions in the solution, i.e. its concentration

• The number of unit charges capable of being transported by each ion, i.e. the ion charge number

• The migration velocity or mobility of the ions.

The conductivity of an electrolyte is a linear function of the concen-tration at a constant temperature since the valency - and also the ion mobility in dilute aqueous solutions - remain constant.

Examples of the dependence of conductivity on the concentration are shown in the figure.

Conductivity of dilute solutions at 18 °C

The total conductivity of a solution is the sum of the conductivities of all ion pairs present in the solution and is thus usually a non-spe-cific variable.

In practice, however, the concentration of a component can be de-termined directly from the conductivity of a solution if

• only one substance is present in the solution

• all constituents of the solution change in approximately the same ratio

• the variation of one constituent of the solution compared to that of the others is so predominant that it alone practically determines the conductivity.

In the case of concentrated solutions of electrolyte there is usually no linear relationship between the conductivity of the solution and the concentration of the electrolyte. The conductivity frequently de-creases as the concentration increases since the degree of disso-ciation drops on the one hand and the ion mobility is reduced on the other because of inter-ionic interactions.

A concentration measurement can nevertheless be carried out if it is only made in a reliable range, i.e. where the conductivity either rises or falls. This assumes that the relationship between conduc-tivity and concentration of the electrolyte is known.

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HACH LANGE2/20

Liquid Analysis

SIPAN 34


Conductivity of concentrated solutions at 18 °C

The conductivity of electrolytes is highly temperature-dependent since both the number of dissociated modules and the ion mobility are highly temperature-dependent. A reference temperature of 25 °C is therefore selected and the measured conductivity values are corrected accordingly using the temperature coefficient α.

The temperature coefficient α depends on

• the composition of the electrolyte solution

• the concentration of the solution.

Values from 1 to 6%/K are possible.

The figure shows that the resistance depends non-linearly on the temperature for an NaCl solution.

Dependence of the resistance of an NaCl solution on the temperature at var-ious concentrations

Three different measuring procedures enable measurement of the conductivity individually adapted to the task and the concentration of the electrolyte:

• Two-electrode procedure

• Four-electrode procedure

• Inductive procedure without electrodes.

The conductivity measuring equipment consists of the following basic components:

• Conductivity sensor

• Temperature sensor to compensate the influence of temperature

• Analyzer.

Twoelectrode procedure

A square-wave AC voltage is applied to the two current electrodes. The current flowing through the solution is inversely proportional to the electrical resistance and directly proportional to the conductivity.

Two-electrode procedure, mode of operation

Fourelectrode procedure

A square-wave AC voltage is applied to two current electrodes.The four-electrode procedure uses two current electrodes and two volt-age electrodes. A square-wave AC voltage is applied to the current electrodes, and the current flowing through the solution is inversely proportional to the electrode resistance and directly proportional to the conductivity. The AC voltage is measured at the voltage elec-trodes and used to control the output voltage at the current elec-trodes. The generation of a deposit on the sensors is thus taken into account and compensated.

Four-electrode procedure, mode of operation

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SIPAN 34

Inductive procedure

The sensor consists of two coils which are positioned on toroidal tape cores. The primary coil is driven by a sinusoidal AC voltage. An AC voltage is induced in the liquid loop (= measured medium) which constitutes the secondary winding of this "transformer". In the case of electrically conducting liquids, a current flows which is proportional to their conductivity. The liquid loop is simultaneously the primary winding of the secondary coil which operates as a cur-rent transformer. This current is rectified in-phase and amplified.

Inductive procedure, mode of operation


• Power supply (24 V AC/DC, 115 V AC, 230 V AC)

• Complete basic configuration

• Self-explanatory menu operation in plain text in five languages (German , English, French, Spanish, Italian), help function

• Operation according to NAMUR, i.e. complete local operation with directly accessible keypad with 8 keys and large, illuminated, full-graphic display

• Display of S/cm, mS/cm, µS/cm, µS/m, MΩcm, kΩcm, % w/w, H2SO4, oleum, HNO3, HCl, HBr, NaOH, NaCl, KOH

• Direct output of concentration values instead of conductivity (19 stored material tables)

• Additional permanent bargraph of measuring range

• Graphic trend display of measured value

• Additional permanent temperature display in °C

• Output signal 0/4 to 20 mA, floating

• Freely-programmable, permanent measuring-point designation (saves tag labels)


• Fault and limit contacts

• Non-linear ultra-pure water temperature compensation for con-ductivity

• All conductivity measuring procedures (2EL/4EL/IND) can be selected, i.e. only one analyzer is required for the complete conductivity range

• Program for automatic recording of user-specific temperature compensation

• Maintenance switch with automatic HOLD function

• Comprehensive fault diagnosis and preventive maintenance sys-tem in plain text

• Three operating levels with coded protection for monitoring, rou-tine and specialists

• Selectable tests for: keys, RAM, EPROM, EEPROM and display

• Output of freely-defined current values for test purposes


• Panel housing made completely of metal, CE safety for every con-trol cabinet installation engineer

• Robust field housing (IP65) with cable screwed glands for easy connection.

Additional optional characteristics

• Second current output for temperature with additional limit

• Individual calibration of each parameter set possible

• Two-point controller for pulse length (dosing valves) or pulse fre-quency (diaphragm pumps)

• Additional switching contact for maintenance (function check) and pre-alarm (warning)

• Cleaning function; three relay contacts can be operated via timer to control an alternating fitting, as well as to give up cleaning and flushing solutions

• The analyzer has four complete parameter sets for four methods, not only for measuring ranges, e.g. also for limits, physical units, temperature compensation with complete characteristic (not only TC value), hysteresis to be set independently from each other. This allows an optimal adaptation in a process when different me-dia have to be measured at one measuring point. Switchover to the correspondent parameter set can be controlled externally.

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2/22 HACH LANGE

Liquid Analysis

SIPAN 34


SIPAN 34 analyzer, display and control panel

HACH LANGE 2/23


SIPAN 34

Technical data

Display Graphical

• Measured value Four 15-mm digits or trend display

5 bars, 3 mm high

• Temperature, alarms, measuring-point identification

3-mm digits

Current output as bargraph, 3 mm high

• Operator control 8 lines of text

1 heading (inverted display) and 6 text lines, letters 4 mm high

• Illumination LED

Languages 5: German, English, French, Italian, Spanish; selectable

Coding 3 coding levels for operations (display level, user level, specialist level)

Dimension µS/cm, mS/cm, S/cm, µS/m, mS/m, S/m, % w/w, MΩcm, kΩcm

Measuring range Observe technical data of sensors



Measuring span for temperature Any, but at least 10% of measuring range

Temperature compensation with conductivity measurement

Linear TC value, 0 to 10%/K

Non-linear response (max. 9 characteristics)

2 characteristics defined as stan-dard for ultra-pure water and beer

Temperature compensation with % w/w

Conductivity tables stored for H2SO4, oleum, HNO3, HCl, HBr, NaOH, KOH, NaCl

Error limits

• With conductivity measurement <1.0% of measuring range (at rated conditions)

• With temperature compensation <1.0% for characteristic (with conductivity)

<0,5% of measured value (for pure liquids)

Influencing effects According to DIN IEC 746, Part 1




• Power supply <0.1%

• Load <0.1%/100 Ω

• Zero error <0.2% of full-scale value

Output signal 4 to 20 mA, floating, linear to mea-sured value or bilinear to measured value (2 linear partial ranges with a knee at 10 or 12 mA, see figure

Max. permissible load in Ω 750


Limit 1 NO or 1 NC contact selectable, hysteresis and response time can be set

Alarm contact 1 alarm (failure)

Relay contacts NO contact, rating 24 V AC/DC, 1 A, floating, non-sparking









-5 °C ... +70 °C corresponds to 3K3 but highest temperature +70 °C for panel mounting



- Temperature -25 °C ... +70 °C corresponds to 1K4 but highest temperature +70 °C



- Temperature -25 °C ... +70 °C correspondsto 2K3


Water protection DIN EN (IEC) 60529

IP65 for field devices

IP54 for panel mounting





Material of panel housing Aluminium


Power supply 120 V AC (94 V ... 132 V), 48 ... 63 Hz, 10 VA

230 V AC (187 V ... 264 V), 48 ... 63 Hz, 10 VA

24 V AC (20 V ... 26 V), 48 ... 63 Hz, 10 VA

24 V DC (20 V ... 30 V), 8 VA, protection class II (field housing)

Electrical isolation Input and output are isolated

Weight 2.5 kg field housing

2.0 kg panel mounting housing

HACH LANGE2/24

Liquid Analysis

SIPAN 34


Programmed data of measured medium in SIPAN 34 for the concentration display (the possible measuring ranges are maximum indications and are in-fluenced by the temperature)

Linear and bent characteristics in SIPAN 34 analyzer

Options

Second output signal 0/4 ... 20 mA linear to temperature

Additional limit 1 x NO or NC contact selectable, any assignment to measured value or temperature

Parameter sets 4

Diagnostic contacts 2, pre-alarm and maintenance

Range signalling Signalling of current measuring range (3 contacts)

Cleaning contacts with timer 3, fitting control, cleaning and flushing

Range switchover 4, parameterizable as desired using range selection; external control possible

Controller 2 floating contacts (instead of limits) as PI controller

Measured medium

Temperature range °C

Possible measuring ranges % w/w

H2SO4 -20 ... +120 0 ... 3432 ... 8592 ... 99.5

Oleum +10 ... +120+10 ... +60

12 ... 4560 ... 70

HNO3 -20 ... +55

0 ... +100

0 ... 3034 ... 8592 ... 95

0 ... 12

HCl -20 ... +55

0 ... +100

0 ... 1624 ... 42

0 ... 12

NaOH 0 ... +100 0 ... 2618 ... 32

NaCl 0 ... +100 0 ... 26

KOH 0 ... +100 0 ... 3432 ... 42

HBr -20 ... +55 0 ... 3039 ... 52

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HACH LANGE 2/25


SIPAN 34

Certificate according to DIN 55350-18-4.1.1 for SIPAN analyzer on request. Please order together with the analyzer in cleartype.

Ordering data Order No..

Analyzer SIPAN 34fourwire system, for conductivity measurementmicroprocessor-based with illuminated graphic display, membrane keyboard, trenddisplay, menu-based operation (5 languages),logbook, concentration display, 1 parameter set,1 signal output 0/4 to 20 mA,1 alarm contact,1 limit contact,2 diagnostic contacts

7MA 2 0 3 4

0 0 0

Power supply

• 24 V DC/24 V AC, 48 ... 63 Hz 0

• 120 V AC, 48 ... 63 Hz 1

• 230 V AC, 48 ... 63 Hz 2

Measuring procedure

• Two-electrode procedure (2EL) A

• Four-electrode procedure (4EL) B

• Inductive procedure (IND) C

Instrument design

• Field housing A

• Panel housing 96 x 96 B

Without additional option 0

With second signal output 0/4 ... 20 mA, and second limit

1

With four selectable parameter sets and three range signalling contacts

2

With second signal output 0/4 ... 20 mA and with four selectable parameter sets and three range signalling contacts

3

Limits with controller function

• Without A

• With B

Automatic cleaning/flushing (3 contacts + timer for fit-ting, cleaning, flushing)

• Without A

• With B


Order No.

For mounting the analyzer on a pipeline


C79451A3177D12



2/26 HACH LANGE

Liquid Analysis

SIPAN 34



SIPAN 34 analyzer as field housing, dimensions in mm

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SIPAN 34

SIPAN 34 analyzer as panel mounting instrument, dimensions in mm

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Liquid Analysis

SIPAN 34


Schematics

Electric connections

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3/2 Overview

3/2 Benefits

3/2 Application

3/4 Design

3/5 Function

3/8 Technical data

3/10 Ordering data


3/12 Schematics

Analyzer for pH Valueand Redox PotentialSIPAN 32 and SIPAN 32X

HACH LANGE3/2

Liquid Analysis


Measuring equipment for pH value and redox potential

Liquid Analyzers

Overview

The SIPAN 32 and SIPAN 32X measuring equipment can be used to measure the pH value and/or redox potential of aqueous solutions.

SIPAN 32 for pH value and redox potential

Benefits

Usefulness of SIPAN 32 and SIPAN 32X

• Two-wire connection

• Sensor diagnosis

• Redundant pH measurement with 2 pH electrodes (increased safety, reduced maintenance costs)

• Standard buffer stored for selection




• Use of all commercial pH and redox glass electrodes

• Differential pH sensors made of enamel (with two high impedance inputs) can be used



• Field enclosure IP65

• Second, passive output, freely parameterizable (for second mea-sured value or temperature (analog) or pre-warning or purging function or limit (binary)).

Application

The application range for pH measurements covers the complete pH scale (see Fig.) from pH = 0 to pH = 14 and for redox potential measurements from -2000 mV to +2000 mV.

Measuring equipment SIPAN 32 and SIPAN 32X, pH scale, examples

pH measurement

pH measurements are carried out in aqueous solutions for the fol-lowing purposes:

• Manufacture of a product with defined characteristics

• Cost-saving production

• Protection of mankind, environment and material from damage

• Satisfy statutory requirements.

In the case of processes with varying temperatures, measurements are usually carried out with temperature compensation because the pH value changes with temperature according to the Nernst equation.

Redox potential measurement

Redox potential (ORP) measurements permit statements to be made on the oxidation or reduction power of an aqueous solution.

Metal combination electrodes (platinum or gold) are used for the measurements and can be installed in the same fittings as the pH sensors.

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HACH LANGE 3/3

Liquid AnalysisMeasuring equipment for pH value and redox potential


Applications

• Monitoring of automatic sewage detoxification

• Monitoring of electrolytic baths and bleaching baths

• Measurements on developers with reducing action, and starting products for dyestuffs, e.g. methylene blue, anthraquinone sul-phonate, indigo sulphate and naphthoquinone

• Monitoring of disinfection action in swimming pools.

Special characteristics

• Use of combination electrodes with integrated Pt1000 tempera-ture sensor for applications where only one mounting location is available

• Special, robust and low-maintenance electrodes for complex measurements in the food/paper industries and in flue gas desul-phurization plants

• Sterilizable electrodes for the food and pharmaceutical industries

• Low-maintenance electrodes with polymer or gel electrolytes which are insensitive to contamination

• Electrodes for installation in pipes or vessels where the measured medium is under pressure

• Replacement fittings for inline installation in reactors or process lines

• Automatic sensor cleaning

• All versions with explosion protection for zone 1/event. zone 0

• Refillable electrode for use in water with low grade ion concentra-tion.

Application field Application example

Biology, medicine, bacteriology Fermenter (antibiotics)

Breweries and yeast factories Brewing water, mash, fermentation (favourable growth of yeast), cleaning solutions (CIP)

Chemical industry Fat synthesis (saponification of fatty acids),

esterification of alcohols,

formation of aldol (production of plastics, etc.),

condensates and waste water in refineries,

glue, gelatine and soap manufacture,

production of acids and alkaline solutions,

chlor-alkali electrolysis

Electrical engineering, electroplating Electrolytic capacitors, electrolytic baths, waste water

Tanneries Steeping the skins, alkalinity of the lime-pit,

decalcification, staining, tanning, bleaching, dying

Rubber industry Stability of latex

Iron and steel works, coke ovens, gas works Ore preparation (flotation), gas purification

(sulphur removal), waste water and water purification

Power plants Avoidance of corrosion in steam circuit, waste water control

Food industry Preservation of fruit juices, gelatinization of jams, souring of milk, cheese preparation, maturing of cream,

yogurt production,

sugar factories: purification and refining of juices (pre-separation and saturation), inversion of glucose, fermentation of molasses, press water,

breweries

Paper, cellulose, rayon and explosives industries Water treatment, sulphite liquor,

bleaching, soaping and wash baths,

sizing with resin soap and aluminium sulphate, neutralization of waste water

Pharmaceutical industry High-purity water,

fermentation process,

product quality

Textile industry Cleaning (soap) baths, bleaching baths,

dye baths (efficiency, hue), wash water (acid-free to avoid spots)

Hydroeconomy Sewage treatment plants (optimum growth conditions in biological stages), river water (monitor-ing of sewage ingress because of danger to fish),

sedimentation and precipitation of colloidal suspensions, softening of water (optimum precipita-tion), neutralization with lime (danger of corrosion for pipes and concrete tanks), base exchange methods (Permutite, Wolfatite)

Oil and gas Acidic water from power refiner or flare zone,

biological sewage preparation,

water charge by NH3, H2S and hydrocarbons of low viscosity

3/4 HACH LANGE

Liquid Analysis



Design


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• a sensor (measuring and reference electrodes, usually as combi-nation electrode)


• a temperature sensor (Pt1000 or Pt100) with temperature-com-pensated pH measurements



They contain the analog and digital data processing functions for the signal delivered by the sensor.

The SIPAN 32 and SIPAN 32X analyzers are available in field hous-ings.




pH value

A potential depending on the concentration of hydrogen ions in the measured medium is generated on the pH sensor. The voltage be-tween the pH electrode and the reference electrode is described by the Nernst equation:

U = Uo + 2,3RT/F x lg a H3O+

The voltage which is proportional to the pH value is converted by the transmitter into a standardized output signal of 58.16 mV per ∆pH = 1 (at 20 °C).

ORP value

The redox potential measurement determines the reduction or ox-idation power of a solution. Oxidizing agents take up electrons, re-ducing agents give up electrons. The process is an equilibrium re-action:

Ox+ + e- ↔ Red

The resulting potential U between the reference and measuring electrodes is applied to the analyzer as a proportional voltage. There is no temperature compensation.

Functions

Function

Sensors

The pH value is defined as the negative decimal logarithm of the hy-drogen ion activity "a" (simplified: hydrogen ion concentration c)

pH = -log a H3O+

and indicates whether a solution (the measured medium) is acidic, neutral or alkaline.

An assembly comprising a measuring electrode (glass electrode) and reference electrode is used to measure the pH value (see Fig.).

In the measuring electrode, use is made of the dependence of the potential of the glass membrane on the hydrogen ion activity. A spherical glass membrane as the pH sensor is usually joined by melting onto the end of the glass shaft. This sphere is filled with a buffer solution of known pH (usually pH 7.0). The tapping electrode is immersed into the glass sphere. The potential difference between the inner and outer surfaces of the glass membrane is used for the pH measurement.

The reference electrode has electrical contact to the measured me-dium via a diaphragm so that the circuit is closed via the measured solution.

The Ag/AgCl tapping system is located in a KCl electrolyte which may be liquid or bound to a gel-type or polymer carrier material.

The measuring and reference electrodes must always have the same tapping system. They can also be supplied as combination electrodes and thus require only one mounting location. The Pt100/1000 sensor for temperature compensation can also be in-tegrated in the combination electrode.

Combination electrodes with integrated Pt100/1000 are preferably used in replacement or immersion fittings in which only one mount-ing location is available.

Reference electrodes with a liquid electrolyte can be filled with KCl via a filling opening and subjected to pressure if necessary.

Mode of operation of pH sensors

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Liquid Analysis



pH sensors, cross-section


• Two-wire analyzer with state-of-the-art micro-power technology




• Display of pH, mV, T


• Limit monitoring

• Monitoring of sensor


• Software clock

• Automatic HOLD function during calibration



• Selectable tests for display, keys, RAM, EPROM, EEPROM



• Robust field housing (IP65/NEMA 4X) with cable screwed glands for easy connection.

Optional characteristics of SIPAN 32

• Redundant pH value, or redundant ORP value, or pH + ORP value measurements with 2 measured-value outputs for increased measuring reliability

• Cleaning and timer function (option).



• Analyzers with type of protection Increased intrinsic safety EEx ib[ia] can be used within the potentially explosive atmo-spheres (zone 1, CENELEC)

• The measuring electrode can also be used in Zone 0 with the rel-evant intrinsic safe approval.









• Additional communication via handheld communicator or PC









• Data transmisson and device supply via common bus connection

• Communication via PROFIBUS PA (Profile B, Version 3.0); thereby all settings completely parameterizable (up to three syn-chronous measured values, measuring range, limits, sensor diag-nostic, operation simulation, etc.)







• Interoperability (replacement with parameter conservation possible)



Parameter sets

The analyzer has four parameter sets for four methods that can be set independently from each other. This allows an optimal adapta-tion in a process when different medias have to be measured. Switchover to the correspondent parameter set can be controlled externally (via HART or PROFIBUS PA).

HACH LANGE 3/7




HACH LANGE3/8

Liquid Analysis



Technical data

Display


• Secondary display/temperature Four 8-mm digits





Unit pH, mV

Measuring range 0 to +15 pH, -2000 to +2000 mV (observe technical data of sensors)



Temperature compensation Input: Pt100/Pt1000, automatic selection, two-wire or three-wire system

Compensation of Nernst voltage, automatic, manual, adjustable tem-perature

Measuring range for temperature -50 to +200 °C, -60 to +400 °F


Electrical isolation Input and output electrically iso-lated

Input resistance

• Glass electrode >1012 Ω

• Reference electrode >1010 Ω

Offset current

• Glass electrode <5⋅10-12 A (at 20 °C)

• Reference electrode <1⋅10-10 A (at 20 °C)

Electrodes

• Electrode assembly zero point pH 0 ... 14

• Slope range 50 ... 60 mV (per ∆pH = 1) at 20 °C

Isothermal intersection Uis -1000 ... +1000 mV

Measuring impedance

• Glass electrode 5 ... 1000 MΩ

• Reference electrode 1 ... 100 kΩ

Error limits

• with pH/ORP measurement <0.03 pH or 2 mV

• with temperature compensation < 0.5% of measured value




• Linearity <0.01 pH or 1 mV

• Ambient temperature <0.02 pH/10 K or 1 mV/10 K

• Power supply <0.01 pH or 1 mV

• Load <0.01 pH/100 Ω or 1 mV/100 Ω

• Zero error <0.01 pH or 1 mV

Output signal 4 to 20 mA, linear to measured value

Max. permissible load in Ω R = (U [power supply] -14) V/0.02 A

Power supply 14 V ... 30 V DC, 0.8 W, protection class II









- Temperature -20 °C ... +60 °C corresponds to 3K6 but lowest temperature -20 °C without condensation








Water protection DIN EN (IEC) 60529IP65 for field devices

EMV DIN EN (IEC) 61326 and NAMUR NE 21






HACH LANGE 3/9



Options

2nd passive analog output 0/4 ...20 mA linear to second mea-sured value to temperature, or con-tact for flushing function or limit or warning (pre-alarm)

Input resistance of high-resistance inputs

pH 1 >1012 Ω, pH 2 >1012 Ω





-20 ... +60 °C

Output signal circuit With type of protection Intrinsic safety only for connection to certi-fied intrinsically-safe circuits with the following maximum values: Ui = 30 V, Ii = 100 mA, Pi = 750 mW, Ri = 300 Ω

Communication



250 ... 500 Ω

Load with connection of HART com-municator

250 ... 500 Ω



Option PROFIBUS PA



• Max. current increase in case of er-ror






• C2 connection 4 connections to Master Class 2 are supported



HACH LANGE3/10

Liquid Analysis



Certificate according to DIN 55350-18-4.1.1 for SIPAN Analyzer on request. Please order together with the analyzer in cleartype.


SIPAN 32 analyzer

twowire system, for pH or ORP measurementsSingle measurement:1 x pH or 1 x ORP, membrane keyboard with LC dis-play, menu control, logbook, measured-value display, temperature compensation, 1 parameter set, microprocessor-controlled, in field housing

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Standard version, 1 signal output: 4 to 20 mA

A


B


Temperatur or switching function for limit or flushing or warning

C


Ordering data Order No..

Analyzer SIPAN 32

twowire system, for pH or ORP measurementsDouble measurement:2 x pH or 2 x ORP, or 1 x pH and 1 x ORPmembrane keyboard with LC display, menu control,logbook, measured-value display, temperature com-pensation, 1 parameter set, microprocessor-con-trolled, in field housing

7 M A 1 1 4 0

8 A

2 signal outputs• 1st signal output: measured value 4 to 20 mA• 2nd, passive signal output: 0/4 to20 mA for pH or

ORP

B

2 signal outputs: 4 to 20 mAwith HART interface

C


Order No.



HART version with Ex protection EEx ia IIC, Smart, with 24 V AC/DC power supply, compact subassem-bly, DIN rail mounting

7NG41221AA10


7NG41221BA10


SIPAN 32X analyzer with Ex protection,

intrinsically safe version,

II (1)2 G EEx ib [ia] II C T4, twowire system, for pH or ORP measurementsSingle measurement:1 x pH or 1 x ORP, membrane keyboard with LC dis-play, menu control, logbook, measured-value display, temperature compensation, 1 parameter set, microprocessor-controlled, in field housing

7 M A 1 0 4 1

8 A

Standard version, 1 signal output: 4 to 20 mA

A


B


Temperatur or warning

C



SIPAN 32X analyzer with Ex protection,

intrinsically safe version,

II (1)2 G EEx ib [ia] II C T4, twowire system, for pH or ORP measurementsDouble measurement:2 x pH or 2 x ORP, or 1 x pH and 1 x ORPmembrane keyboard with LC display, menu control, logbook, measured-value display, temperature com-pensation, 1 parameter set, microprocessor-con-trolled, in field housing

7 M A 1 1 4 1

8 A

2 signal outputs• 1st signal output: measured value 4 to 20 mA• 2nd, passive signal output: 0/4 to20 mA for pH or

ORP

B

2 signal outputs: 4 to 20 mAwith HART interface

C



Order No.



C79451A3177D12



HACH LANGE 3/11





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Liquid Analysis



Schematics

Electric sensor connections for pH or redox potential measurement

Electric sensor connections for pH or redox potential measurement with sensor monitoring

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Please look at the current product list attached, if the product is still available.

HACH LANGE 3/13



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Electric sensor connections, on left for simultaneous pH or redox potential measurement, on right differential pH sensor with sensor monitoring

HACH LANGE3/14

Liquid Analysis




Note:When the SIPAN 32 is used with two measuring electrodes (pH + pH, pH + ORP, ORP + ORP), observe that the two electrodes and the temperature sensor are in the same medium because only one reference electrode is used for both measuring electrodes. the two measuring electrodes (pH + pH, pH + ORP) always must be calibrated together.

HACH LANGE

3/16 Overview

3/16 Benefits

3/16 Application

3/18 Design

3/19 Function

3/22 Technical data

3/24 Ordering data


3/27 Schematics

Analyzer for pH Valueand Redox PotentialSIPAN 34

HACH LANGE3/16

Liquid Analysis

SIPAN 34



Overview

The SIPAN 34 measuring equipment can be used to measure the pH value and/or redox potential of aqueous solutions.

SIPAN 34 for pH value and redox potential

Benefits

Usefulness of SIPAN 34

• Four-wire connection


• Redundant pH measurement with 2 pH electrodes (increased safety, reduced maintenance costs)

• Standard buffer stored for selection




• Use of all commercial pH and redox glass electrodes

• Differential pH sensors made of enamel (with two high impedance inputs) can be used



• Second output for measured value or temperature (option).

Application

The application range for pH measurements covers the complete pH scale (see Fig.) from pH = 0 to pH = 14 and for redox potential measurements from -2000 mV to +2000 mV.

Measuring equipment SIPAN 34, pH scale, examples

pH measurement

pH measurements are carried out in aqueous solutions for the fol-lowing purposes:

• Manufacture of a product with defined characteristics

• Cost-saving production

• Protection of mankind, environment and material from damage

• Satisfy statutory requirements.

In the case of processes with varying temperatures, measurements are usually carried out with temperature compensation because the pH value changes with temperature according to the Nernst equation.

Redox potential measurement

Redox potential (ORP) measurements permit statements to be made on the oxidation or reduction power of an aqueous solution.

Metal combination electrodes (platinum or gold) are used for the measurements and can be installed in the same fittings as the pH sensors.

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HACH LANGE 3/17


SIPAN 34

Applications

• Monitoring of automatic sewage detoxification

• Monitoring of electrolytic baths and bleaching baths

• Measurements on developers with reducing action, and starting products for dyestuffs, e.g. methylene blue, anthraquinone sul-phonate, indigo sulphate and naphthoquinone

• Monitoring of disinfection action in swimming pools.


• Use of combination electrodes with integrated Pt1000 tempera-ture sensor for applications where only one mounting location is available

• Special, robust and low-maintenance electrodes for complex measurements in the food/paper industries and in flue gas desul-phurization plants

• Sterilizable electrodes for the food and pharmaceutical industries

• Low-maintenance electrodes with polymer or gel electrolytes which are insensitive to contamination

• Electrodes for installation in pipes or vessels where the measured medium is under pressure

• Replacement fittings for inline installation in reactors or process lines

• Automatic sensor cleaning

• All versions with explosion protection for zone 1/event. zone 0

• Refillable electrode for use in water with low grade ion concentra-tion.

Application field Application example

Biology, medicine, bacteriology Fermenter (antibiotics)

Breweries and yeast factories Brewing water, mash, fermentation (favourable growth of yeast), cleaning solutions (CIP)

Chemical industry Fat synthesis (saponification of fatty acids),

esterification of alcohols,

formation of aldol (production of plastics, etc.),

condensates and waste water in refineries,

glue, gelatine and soap manufacture,

production of acids and alkaline solutions,

chlor-alkali electrolysis

Electrical engineering, electroplating Electrolytic capacitors, electrolytic baths, waste water

Tanneries Steeping the skins, alkalinity of the lime-pit,

decalcification, staining, tanning, bleaching, dying

Rubber industry Stability of latex

Iron and steel works, coke ovens, gas works Ore preparation (flotation), gas purification

(sulphur removal), waste water and water purification

Power plants Avoidance of corrosion in steam circuit, waste water control

Food industry Preservation of fruit juices, gelatinization of jams, souring of milk, cheese preparation, maturing of cream,

yogurt production,

sugar factories: purification and refining of juices (pre-separation and saturation), inversion of glucose, fermentation of molasses, press water,

breweries

Paper, cellulose, rayon and explosives industries Water treatment, sulphite liquor,

bleaching, soaping and wash baths,

sizing with resin soap and aluminium sulphate, neutralization of waste water

Pharmaceutical industry High-purity water,

fermentation process,

product quality

Textile industry Cleaning (soap) baths, bleaching baths,

dye baths (efficiency, hue), wash water (acid-free to avoid spots)

Hydroeconomy Sewage treatment plants (optimum growth conditions in biological stages), river water (monitoring of sewage ingress because of danger to fish),

sedimentation and precipitation of colloidal suspensions, softening of water (optimum precipita-tion), neutralization with lime (danger of corrosion for pipes and concrete tanks), base exchange methods (Permutite, Wolfatite)

Oil and gas Acidic water from power refiner or flare zone,

biological sewage preparation,

water charge by NH3, H2S and hydrocarbons of low viscosity

HACH LANGE3/18

Liquid Analysis

SIPAN 34


Design


The SIPAN 34 measuring equipment consists of:

• a sensor (measuring and reference electrodes, usually as combination electrode)


• a temperature sensor (Pt1000 or Pt100) with temperature-com-pensated pH measurements

• a SIPAN 34 analyzer.

SIPAN 34 are analyzers of the new four-wire generation with state-of-the-art micropower technology with microprocessor control and multi-segment display.

The measured signal delivered by the sensor is processed in the SI-PAN 34 analyzer and at disposition in analog form.

The SIPAN 34 analyzers are available in field and in panel housings.




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HACH LANGE 3/19


SIPAN 34

pH value

A potential depending on the concentration of hydrogen ions in the measured medium is generated on the pH sensor. The voltage be-tween the pH electrode and the reference electrode is described by the Nernst equation:

U = Uo + 2.3RT/F x lg aH3O+

The voltage which is proportional to the pH value is converted by the transmitter into a standardized output signal of 58.16 mV per ∆pH = 1 (at 20 °C).

ORP value

The redox potential measurement determines the reduction or oxidation power of a solution. Oxidizing agents take up electrons, reducing agents give up electrons. The process is an equilibrium reaction:

Ox+ + e- ↔ Red

The resulting potential U between the reference and measuring electrodes is applied to the analyzer as a proportional voltage. There is no temperature compensation.

Functions

Function

Sensors

The pH value is defined as the negative decimal logarithm of the hy-drogen ion activity "a" (simplified: hydrogen ion concentration c)

pH = -log a H3O+

and indicates whether a solution (the measured medium) is acidic, neutral or alkaline.

An assembly comprising a measuring electrode (glass electrode) and reference electrode is used to measure the pH value (see Fig.).

In the measuring electrode, use is made of the dependence of the potential of the glass membrane on the hydrogen ion activity. A spherical glass membrane as the pH sensor is usually joined by melting onto the end of the glass shaft. This sphere is filled with a buffer solution of known pH (usually pH 7.0). The tapping electrode is immersed into the glass sphere. The potential difference between the inner and outer surfaces of the glass membrane is used for the pH measurement.

The reference electrode has electrical contact to the measured me-dium via a diaphragm so that the circuit is closed via the measured solution.

The Ag/AgCl tapping system is located in a KCl electrolyte which may be liquid or bound to a gel-type or polymer carrier material.

The measuring and reference electrodes must always have the same tapping system. They can also be supplied as combination electrodes and thus require only one mounting location. The Pt100/1000 sensor for temperature compensation can also be in-tegrated in the combination electrode.

Combination electrodes with integrated Pt100/1000 are preferably used in replacement or immersion fittings in which only one mount-ing location is available.

Reference electrodes with a liquid electrolyte can be filled with KCl via a filling opening and subjected to pressure if necessary.

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HACH LANGE3/20

Liquid Analysis

SIPAN 34


Mode of operation of pH sensors

pH sensors, cross-section


• Four-wire analyzer with extremely easy operation

• Universal power supply (24 V AC/DC, 115 V AC, 230 V AC)


• Self-explanatory menu operation in plain text in five languages, without Instruction Manual, HELP function


• Display of pH, mV, additional permanent bargraph of measuring range




• Freely-programmable, permanent measuring-point designation (saves TAG labels)


• Sensor monitoring


• Automatic recognition of buffer (NIST and technical buffers)



• Three operating levels with coded protection for monitoring, rou-tine and specialists

• Selectable tests for: keys, RAM, EPROM, EEPROM, display




• Robust field housing (IP65) with cable screwed glands for easy connection.

Additional, optional characteristics

• Second current output for measured value or temperature with additional limit

• Four parameter sets with remote selection for complete methods, not only for measuring ranges, e.g. also limits, temperature com-pensation, hysteresis

• Automatic cleaning function (3 relays) for cleaning, flushing, fitting control with cyclic time input, waiting and holding functions


• Additional switching contact for maintenance (function check) and pre-alarm (warning)

• Redundant pH or ORP measurement with 2 measured-value out-puts for increased measuring reliability.

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HACH LANGE 3/21


SIPAN 34


HACH LANGE3/22

Liquid Analysis

SIPAN 34


Technical data

Display Graphical


5 bars, 3 mm high


3-mm digits

Current output as bargraph, 3 mm high

• Operator control 8 lines of text

1 heading (inverted display) and 6 text lines, letters 4 mm high


Languages 5: German, English, French, Ital-ian, Spanish; selectable


Dimension pH, mV

Measuring range -3 ...+15 pH, -2000 ...+2000 mV (observe technical data of sensors)



Temperature compensation Input: Pt100/Pt1000, automatic selection, two-wire or three-wire system

Compensation of Nernst voltage, automatic, manual, adjustable tem-perature



Electrical isolation nput and output electrically isolated

Input resistance

• Glass electrode >1012 Ω


Offset current

• Glass electrode <5⋅10-12 A (at 20 °C)

• Reference electrode <1⋅10-10 A (at 20 °C)

Electrodes

• Electrode assembly zero point pH 0 ... 14

• Slope range 50 ... 60 mV (per ∆pH = 1) at 20 °C

Isothermal intersection Uis -1000 ... +1000 mV

Measuring impedance

• Glass electrode 5 ... 1000 MΩ

• Reference electrode 1 ... 100 kΩ

Error limits

• with pH/ORP measurement <0.03 pH or 2 mV

• with temperature compensation < 0.5% of measured value




• Linearity <0.01 pH or 1 mV

• Ambient temperature <0.02 pH/10 K or 1 mV/10 K

• Power supply <0.01 pH or 1 mV

• Load <0.01 pH/100 Ω or 1 mV/100 Ω

• Zero error <0.01 pH or 1 mV

Output signal 0/4 ... 20 mA, linear to measured value



Limit 1 NO or 1 NC contact selectable, hysteresis and response time can be set


Diagnostic contacts Two, pre-alarm and maintenance

Relay contacts Rating 24 V DC, 1 A





Protection According to IEC 79-15; conformity certificate













HACH LANGE 3/23


SIPAN 34








Material of panel housing Aluminium



230 V AC (187 V ... 264 V), 48 ... 63 Hz, 10 VA

24 V AC (20 V ... 26 V), 48 ... 63 Hz, 10 VA




Options

Second output signal 0/4 ... 20 mA linear to second measured value or to temperature


Parameter sets 4


Cleaning contacts with timer 3, fitting control, cleaning and flushing



• pH electrode pH 1 >1012 Ω, pH 2 >1012 Ω


HACH LANGE3/24

Liquid Analysis

SIPAN 34


1) The measuring procedures B and C require analyzers with the additional options 1 or 3, because the second output (for the second measured value) would not be at disposal.

Certificate according to DIN 55350-18-4.1.1 for SIPAN analyzer on request.

Please order together with the analyzer in cleartype.


Analyzer SIPAN 34fourwire system, for pH or ORP measurementsmicroprocessor-based with illuminated graphic display, membrane keyboard, trenddisplay, menu-based operation (5 languages),logbook, temperature compensation, 1 parameter set,1 signal output 0/4 to 20 mA,1 alarm contact,1 limit contact,2 diagnostic contacts

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Power supply

• 24 V DC/24 V AC, 48 ... 63 Hz 0

• 120 V AC, 48 ... 63 Hz 1

• 230 V AC, 48 ... 63 Hz 2

Measuring procedure

• 1 x pH- or 1 x redox input A

• 2 x pH inputs 1)B

• 1 x pH- and1 x redox input or2 x redox inputs 1)

C

Instrument design

• Field housing A




1


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• Without A

• With B


• Without A

• With B


Order No.



C79451A3177D12



HACH LANGE 3/25


SIPAN 34



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Liquid Analysis

SIPAN 34



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HACH LANGE 3/27


SIPAN 34

Schematics

Electric sensor connections for pH or redox potential measurement

Electric connections

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Please look at the current product list attached, if the product is still available.

3/28 HACH LANGE

Liquid Analysis

SIPAN 34


Electric sensor connections for redundant pH and/or redox potential measurement with sensor monitoring, 2 pH sensors in one measured medium

Electric sensor connections, on left for simultaneous pH or redox potential measurement, on right differential pH sensor with sensor monitoring

Note:When the SIPAN 34 analyzer is used with two measuring electrodes (pH + pH, pH + ORP, ORP + ORP), observe that the two electrodes and the temperature sensor are in the same medium because only one reference electrode is used for both measuring electrodes. the two measuring electrodes (pH + pH, pH + ORP) always must be calibrated together.

Please check availability within attached product list.

HACH LANGE

4/2 Overview

4/2 Benefits

4/3 Application

4/5 Design

4/6 Function

4/9 Technical data

4/11 Ordering data


4/13 Schematics

Analyzer for Dissolved OxygenSIPAN 32 and SIPAN 32X

HACH LANGE4/2

Liquid Analysis


Analyzer for Dissolved Oxygen


Overview

The SIPAN 32 and SIPAN 32X measuring equipment is designed to determine the concentration of oxygen in aqueous solutions within wide concentration ranges.

SIPAN 32 for the measurement of dissolved oxygen

Benefits

Benefits of SIPAN 32 and SIPAN 32X

• Two-wire technology


• Automatic Hold function


• Local operation following NAMUR




• Second, passive output, freely parameterizable (for temperature (analog) or pre-warning/purging function/limit (binary))

• Manual correction of atmospheric pressure during calibration.

HACH LANGE 4/3

Liquid AnalysisAnalyzer for Dissolved Oxygen


Application

Utilization

• Monitoring of very low oxygen concentrations in the steam circuit of steam generating plants to prevent corrosion

• Checking of the oxygen content of food, especially for monitoring storage life in the drinks industry

• Oxygen concentration as a decisive parameter for the environ-mental analysis of rivers and lakes

• Oxygen measurements in sewage treatment plants up to very high concentrations in the aeration tank

• Monitoring of the O2 requirement of microorganisms in biotech-nology

• Checking the oxygen concentration in chemical processes, also in potentially explosive atmosphere.


• Almost independent of flow rate (minimum flow only 0.005 m/s), dependent on sensor

• Extremely long service life

• Automatic sensor monitoring and regeneration display

• Fast replacement of membrane as result of robust special mem-brane, insensitive to contamination

• O2 sensor for food applications can be sterilized and can be fitted in a bypass or inline using an attachment fitting or a replacement fitting

• Single-point calibration of sensor using air (sensor is free of resid-ual current)

• No calibration liquid required

• Design with explosion protection for zone 1.

Measurement of dissolved oxygen in water

• The amount of dissolved oxygen in water may be important for various reasons

• We use the polarographic measuring procedure for the different fields of application for oxygen measurements which differentiate by three to four orders of magnitude.

Measurement of dissolved oxygen in boiler feedwater (ultrapure water)

Measured medium with low concentrations of 1 µg/l to 10 mg/l dissolved oxygen

It is important that there is as little oxygen as possible in the water of steam circuits of large power plants to prevent damage caused by corrosion. The dissolved oxygen should be monitored there with an order of magnitude µg O2/l water.

In these water/steam circuits, water with an extremely low contam-ination is required to prevent deposits which could lead to a reduc-tion in economy and to faults. Such ultra-pure water is aggressive. A layer of insoluble Fe3O4 is formed in the pipelines and therefore builds up a protective layer. However, if dissolved oxygen is present in a water/steam circuit, it is assumed that this protective layer is attacked at the high temperatures and pressures which exist, and that damage due to corrosion may result following further effects of the dissolved oxygen.

Such trace measurements can only be carried out with great diffi-culty in a laboratory since sampling completely free of oxygen is dif-ficult. Furthermore, the time intervals are usually too great if it is considered that even completely invisible leaks can already easily lead to a dangerous oxygen concentration of 100 µg O2/l which would probably be detected too late by occasional laboratory mea-surements.

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HACH LANGE4/4

Liquid Analysis



Therefore industrial measuring instruments are appropriate for such cases. Such instruments should require little maintenance to pro-vide economic use and high operational reliability, and they must also be highly sensitive trace analyzers.

The feedwater inlet upstream of the boiler is recommendable as the measuring location, although measurements are occasionally also made upstream of the feedwater pump because it is then unnec-essary to have expansion equipment.

A second measuring location is the outlet line from the condenser. The measurement is important here in order e.g. to rapidly detect leaks on the condenser and the machine.

Similar or even higher water quality demands are placed during semiconductor (chip) manufacturing.

Measurement of dissolved oxygen in rivers, lakes and waste water

Measured medium with medium concentrations of 50 µg/l to 60 mg/l dissolved oxygen

In this case, the dissolved oxygen in the water is essential to pre-serve life. Sufficient quantities of dissolved oxygen must be present in rivers or lakes to preserve animal life and the biological equilib-rium. In sewage treatment plants, oxygen must even be introduced into the waste water to preserve and promote bacterial cultures for the biological decomposition of contaminants in the water. Econom-ical operation is also an important factor here. In these cases, the oxygen concentration has an order of magnitude of several mg O2/l.

The increasing contamination of rivers and lakes by toxic materials, organic and inorganic ballast, and by increased water temperatures resulting from the use of cooling plants means that water monitor-ing is becoming increasingly important.

The main task of such monitoring is to guarantee biological equilib-rium by using appropriate measures. This equilibrium is essential to preserve animal life and to prevent the contamination of surface water for drinking and service purposes.

One of the most important measured variables is the dissolved ox-ygen, where concentrations of several mg O2/l must be measured.

In addition to mechanical cleaning, biological clarification is used in sewage treatment plants to break down organic compounds using bacteria. A dissolved oxygen concentration of approx. 1.5 to 2.5 mg O2/l must be present in the waste water to activate and sustain this treatment process. This oxygen is passed mechanically into the aeration tanks using air.

The energy required for input of air/oxygen is quite significant, and the amount of oxygen entered should therefore be carried out as economically as possible. Measurement of the dissolved oxygen in the waste water is therefore necessary.

Measurement of dissolved oxygen in the food industry and in biotechnology process plants


A long storage life for manufactured products is becoming increas-ingly important in the food industry for economy reasons. For this reason, the individual parameters must be strictly checked in the production plants.

The amount of dissolved oxygen is of decisive importance for the storage life of a number of products. For example, a typical value for freshly filled beer is 20 µg/l, and a lower amount increases its life. This is particularly important if beer is brewed according to the Ger-man beer purity regulations which forbid the addition of conserva-tion agents.

It is important to exactly control the process sequence of biotech-nology plants. An important variable is the amount of dissolved ox-ygen. Since food and biotechnology plants are sensitive to foreign germs, all used components must have a sterilizable design.

Cleaning using steam sterilization is carried out regularly at defined intervals. It is therefore important to have a temperature-stable de-sign of the wetted parts materials. Our stainless steel components have been proven as suitable for this technology.

HACH LANGE 4/5



Design



• a sensor


• a temperature sensor



The SIPAN 32 and SIPAN 32X analyzers are optionally available with special features for process use.

The SIPAN 32 and SIPAN 32X analyzers are available in field housing.



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HACH LANGE4/6

Liquid Analysis



Functions



Oxygen

Oxygen is reduced by the polarization voltage present between the working and reference electrodes according to the simplified equa-tion:

O2 + 2H2O + 4e- → 4OH-

The electrons are supplied by the silver reference electrode, simpli-fied according to:

4Ag → 4Ag+ + 4e-


Oxygen:

The input signal supplied by the sensor is converted into a stan-dardized output signal by a range-dependent amplifier circuit.

Temperature:

The temperature of the measured medium is converted into a stan-dardized output signal corresponding to a measuring range of the sensor. An NTC resistor is fitted in the sensor as the thermometer.

Function

Water free of oxygen absorbs oxygen when in contact with atmo-spheric air depending on the atmospheric pressure and the temper-ature until a state of equilibrium has been reached, i.e. the partial pressure of oxygen in the water is equal to that of the surrounding air.

The sensors which can be combined with the SIPAN 32 analyzers operate according to the polarographic principle.

The so-called Clark sensors basically consist of a precious metal working electrode (cathode), a silver reference electrode (anode) and a membrane which is permeable to oxygen.

The analyzer delivers a constant polarization voltage at the cath-ode. The O2 molecules diffusing through the FEP or PTFE mem-brane are reduced at the gold cathode, and at the same time an-ode metal (silver) passes into solution in the electrolyte following oxidation.

Thus the circuit between the anode and cathode is closed by the passage of ions via the electrolyte.

The resulting current is proportional to the partial pressure of oxy-gen in the measured medium and is measured by the amplifier.

The quantity of oxygen diffusing through the membrane per unit of time not only depends on the external partial pressure of oxygen but also on the temperature of the membrane.

To permit temperature compensation, a temperature sensor (NTC thermistor) is fitted in the oxygen sensor such that it is connected thermally to the measured medium and can therefore signal its tem-perature to the analyzer.

Mode of operation of oxygen sensors with two-electrode system

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Calibration and regeneration of the oxygen sensors

The sensor is calibrated using a single point (sensor is free of resid-ual current), preferably using air. The sensor is adjusted for 100% saturation.

The calibration cycle depends on the conditions of use and the re-quired accuracy.

The sensor must be regenerated, i.e. the electrolyte must be refilled and the membrane head replaced, if it can no longer be calibrated or if the membrane is damaged.

The microprocessor analyzer operates with a non-linear tempera-ture characteristic which is individually matched to the sensor to permit temperature compensation.


• Two-wire analyzer with state-of-the-art micro-power technology




• Display of µg/l, mg/l, mbar, ppb, hPA, % saturation


• Limit monitoring

• Software clock




• Automatic HOLD function



• Selectable tests for: display, keys, RAM, EPROM, EEPROM



• Robust field housing (IP65/NEMA 4X) with four cable screwed glands for easy connection.



• Analyzers with type of protection "Increased intrinsic safety" EEx ib[ia] can be used within the potentially explosive atmospheres (zone 1, CENELEC)

• With a corresponding Ex approval the measuring electrode can also be used in Zone 0.






• Optional second passive output, freely-parameterizable as addi-tional current output, for temperature or contact for flushing func-tion or limit or warning (pre-alarm).



• Additional communication via PC





• Optional second passive output, freely-parameterizable as addi-tional current output, for temperature or contact for flushing func-tion or limit or warning (pre-alarm).




• Data transmission and device supply via common bus connection

• Communication via PROFIBUS PA (Profile B, Version 3.0); thereby all settings completely parameterizable (up to three syn-chronous measured values, measuring range, limits, sensor diag-nostic, operation simulation, etc.)







• Interoperability (replacement with parameter conservation possi-ble)




The analyzer has four parameter sets for four methods that can be set independently from each other. This allows an optimal adapta-tion in a process when different media have to be measured. Switchover to the correspondent parameter set can be controlled externally (via HART or PROFIBUS PA).

4/8 HACH LANGE

Liquid Analysis




HACH LANGE 4/9



Technical data

Display


• Temperature Four 8-mm digits




Coding 3 coding levels for operations (display level, user level, specialist level)

Unit µg/l, mg/l, mbar, ppb, hPa, % saturation

Temperature units Celsius, Fahrenheit

Measuring range observe technical data of sensors



Temperature compensation Dependent on sensor type

Measuring range for temperature -50 ... +150 °C, dependent on sensor type


Compensation of atmospheric pressure

Manual input

Sensor calibration Manual using air

Error limits

• Oxygen measurement(at rated conditions)

<1.5% of measured value

• Temperature (at rated conditions)

<0.3 K






• Power supply <0.2% of full-scale value

• Load <0.1%/100 Ω

• Zero error <0.2% of measured value, dependent on sensor type

• Salinity correction Possible

Output signal electrically isolated from sensor, 4 to 20 mA linear to measured value or bilinear to measured value (2 linear partial ranges with a knee at 12 mA), see figure

Max. permissible load in Ω R = (U [power supply] – 14 V) / 0.02 A


Power supply 14 V DC (14 V ... 30 V), 0.8 W, pro-tection class II



Device self-test Testing of RAM, EPROM, EEPROM, display, keyboard













Water protection DIN EN (IEC) 60529IP65 for field devices






Weight 2.5 kg, field housing

Options

2nd passive analog output 0/4 to 20 mA linear to temperature, or contact for flushing function or limit or warning (pre-alarm)





-20 ... +60 °C

Output signal circuit With type of protection Intrinsic safety EEx ia IIC only for connec-tion to certified intrinsically-safe cir-cuits with the following maximum values: Ui = 30 V, Ii = 100 mA, Pi = 750 mW, Ri = 300 Ω

HACH LANGE4/10

Liquid Analysis



Linear and bent characteristic

Communication



250 ... 500 Ω

Load with connection of HART-communicator

250 ... 500 Ω



Option PROFIBUS PA



• Max. current increase in case of error






• C2 connections 4 connections to Master Class 2 are supported



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HACH LANGE 4/11





SIPAN 32 analyzertwowire system, for the measurement of dissolved oxygenmicroprocessor-controlled, membrane keyboard with LC display, menu control, measured-value display, logbook, concentration display, temperature compensation, 1 parameter set, in field housing

7MA 3 0 4 0

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Order No.



HART version with Ex protection EEx ia IIC, Smart, with 24 V DC power supply, p.c.b., single locking

7NG41221AA10


7NG41221BA10


SIPAN 32X analyzer with Ex protection, intrinsicallysafe version,II 2 (1) G EEx ib [ia] II C T4,twowire system, for the measurement of dissolved oxygenmicroprocessor-controlled, membrane keyboard with LC display, menu control, measured-value display, logbook, concentration display, temperature compensation, 1 parameter set, in field housing

7MA 3 0 4 1

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Order No.



C79451A3177D12



HACH LANGE4/12

Liquid Analysis





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Schematics

SIPAN 32 or SIPAN 32X analyzer, electric connections

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Liquid Analysis




HACH LANGE

4/16 Overview

4/16 Benefits

4/17 Application

4/19 Design

4/20 Function

4/23 Technical data

4/25 Ordering data


4/28 Schematics

Analyzer for Dissolved OxygenSIPAN 34

HACH LANGE4/16

Liquid Analysis

SIPAN 34



Overview

The SIPAN 34 measuring equipment is designed to determine the concentration of oxygen in aqueous solutions within wide concen-tration ranges.

SIPAN 34 for the measurement of dissolved oxygen

Benefits

Benefits of SIPAN 34

• Four-wire technology


• Automatic Hold function


• Local operation following NAMUR

• Three freely-programmable relays



• Second output for temperature (option)

• Automatic atmospheric pressure correction during calibration.

HACH LANGE 4/17


SIPAN 34

Application

Utilization

• Monitoring of very low oxygen concentrations in the steam circuit of steam generating plants to prevent corrosion

• Checking of the oxygen content of foods, especially for monitor-ing storage life in the drinks industry

• Oxygen concentration as a decisive parameter for the environ-mental analysis of rivers and lakes

• Oxygen measurements in sewage treatment plants up to very high concentrations in the aeration tank

• Monitoring of the O2 requirement of microorganisms in biotech-nology.


• Almost independent of flow rate (minimum flow only 0.005 m/s), dependent on sensor

• Extremely long service life

• Automatic sensor monitoring and regeneration display

• Fast replacement of membrane as result of robust special mem-brane, insensitive to contamination

• Automatic correction of atmospheric pressure during calibration

• O2 sensor for food applications can be sterilized and can be fitted in a bypass or inline using an attachment fitting or a replacement fitting

• Single-point calibration of sensor using air (sensor is free of residual current)

• No calibration liquid required.

Measurement of dissolved oxygen in water

• The amount of dissolved oxygen in water may be important for various reasons

• We use the polarographic measuring procedure for the three dif-ferent fields of application for oxygen measurements which differ-entiate by three to four orders of magnitude.

Measurement of dissolved oxygen in boiler feedwater (ultrapure water)

Measured medium with low concentrations of 1 µg/l to 10 mg/l dissolved oxygen

It is important that there is as little oxygen as possible in the water of steam circuits of large power plants to prevent damage caused by corrosion. The dissolved oxygen should be monitored there with an order of magnitude µg O2/l water.

In these water/steam circuits, water with an extremely low contam-ination is required to prevent deposits which could lead to a reduc-tion in economy and to faults. Such ultra-pure water is aggressive. A layer of insoluble Fe3O4 is formed in the pipelines and therefore builds up a protective layer. However, if dissolved oxygen is present in a water/steam circuit, it is assumed that this protective layer is attacked at the high temperatures and pressures which exist, and that damage due to corrosion may result following further effects of the dissolved oxygen.

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HACH LANGE4/18

Liquid Analysis

SIPAN 34


Such trace measurements can only be carried out with great diffi-culty in a laboratory since sampling completely free of oxygen is dif-ficult. Furthermore, the time intervals are usually too great if it is considered that even completely invisible leaks can already easily lead to a dangerous oxygen concentration of 100 µg O2/l which would probably be detected too late by occasional laboratory mea-surements.

Therefore industrial measuring instruments are appropriate for such cases. Such instruments should require little maintenance to pro-vide economic use and high operational reliability, and they must also be highly sensitive trace analyzers.

The feedwater inlet upstream of the boiler is recommendable as the measuring location, although measurements are occasionally also made upstream of the feedwater pump because it is then unnec-essary to have expansion equipment.

A second measuring location is the outlet line from the condenser. The measurement is important here in order e.g. to rapidly detect leaks on the condenser and the machine.

Similar or even higher water quality demands are placed during semiconductor (chip) manufacturing.

Measurement of dissolved oxygen in rivers, lakes and waste water


In this case, the dissolved oxygen in the water is essential to pre-serve life. Sufficient quantities of dissolved oxygen must be present in rivers or lakes to preserve animal life and the biological equilib-rium. In sewage treatment plants, oxygen must even be introduced into the waste water to preserve and promote bacterial cultures for the biological decomposition of contaminants in the water. Econom-ical operation is also an important factor here. In these cases, the oxygen concentration has an order of magnitude of several mg O2/l.

The increasing contamination of rivers and lakes by toxic materials, organic and inorganic ballast, and by increased water temperatures resulting from the use of cooling plants means that water monitor-ing is becoming increasingly important.

The main task of such monitoring is to guarantee biological equilib-rium by using appropriate measures. This equilibrium is essential to preserve animal life and to prevent the contamination of surface water for drinking and service purposes.

One of the most important measured variables is the dissolved ox-ygen, where concentrations of several mg O2/l must be measured.

In addition to mechanical cleaning, biological clarification is used in sewage treatment plants to break down organic compounds using bacteria. A dissolved oxygen concentration of approx. 1.5 to 2.5 mg O2/l must be present in the waste water to activate and sustain this treatment process. This oxygen is passed mechanically into the aeration tanks using air.

The energy required for input of air/oxygen is quite significant, and the amount of oxygen entered should therefore be carried out as economically as possible. Measurement of the dissolved oxygen in the waste water is therefore necessary.

Measurement of dissolved oxygen in the food industry and in biotechnology process plants


A long storage life for manufactured products is becoming increas-ingly important in the food industry for economy reasons. For this reason, the individual parameters must be strictly checked in the production plants.

The amount of dissolved oxygen is of decisive importance for the storage life of a number of products. For example, a typical value for freshly filled beer is 20 µg/l, and a lower amount increases its life. This is particularly important if beer is brewed according to the Ger-man beer purity regulations which forbid the addition of conserva-tion agents.

It is important to exactly control the process sequence of biotech-nology plants. An important variable is the amount of dissolved ox-ygen. Since food and biotechnology plants are sensitive to foreign germs, all used components must have a sterilizable design.

Cleaning using steam sterilization is carried out regularly at defined intervals. It is therefore important to have a temperature-stable de-sign of the wetted parts materials. Our stainless steel components have been proven as suitable for this technology.

HACH LANGE 4/19


SIPAN 34

Design


SIPAN 34 are analyzers of the four-wire generation with state-of-the-art micro-power technology with microprocessor control and illuminated graphic display.

The SIPAN 34 analyzers are optionally available with special fea-tures for process use.

The SIPAN 34 analyzer is available in two designs:

• in field housing and

• in panel housing 96 x 96.



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Liquid Analysis

SIPAN 34




Oxygen

Oxygen is reduced by the polarization voltage present between the working and reference electrodes according to the simplified equa-tion:

O2 + 2H2O + 4e- → 4OH-

The electrons are supplied by the silver reference electrode, simpli-fied according to:

4Ag → 4Ag+ + 4e-


Oxygen:

The input signal supplied by the sensor is converted into a stan-dardized output signal by a range-dependent amplifier circuit.

Temperature:

The temperature of the measured medium is converted into a stan-dardized output signal corresponding to a measuring range of the sensor. An NTC resistor is fitted in the sensor as the thermometer.

Functions

Function

Water free of oxygen absorbs oxygen when in contact with atmo-spheric air depending on the atmospheric pressure and the tem-perature until a state of equilibrium has been reached, i.e. the partial pressure of oxygen in the water is equal to that of the sur-rounding air.

The sensors which can be combined with the SIPAN 34 analyzers operate according to the polarographic principle.

The so-called Clark sensors basically consist of a precious metal working electrode (cathode), a silver reference electrode (anode) and a membrane which is permeable to oxygen.

A silver counterelectrode is also present in sensors with a three-electrode system.

The analyzer delivers a constant polarization voltage at the cath-ode. The O2 molecules diffusing through the FEP or PTFE mem-brane are reduced at the gold cathode, and at the same time an-ode metal (silver) passes into solution in the electrolyte following oxidation.

Thus the circuit between the anode and cathode is closed by the passage of ions via the electrolyte.

The resulting current is proportional to the partial pressure of oxy-gen in the measured medium and is measured by the amplifier.

The quantity of oxygen diffusing through the membrane per unit of time not only depends on the external partial pressure of oxygen but also on the temperature of the membrane.

To permit temperature compensation, a temperature sensor (NTC thermistor) is fitted in the oxygen sensor such that it is connected thermally to the measured medium and can therefore signal its tem-perature to the analyzer.

Mode of operation of oxygen sensors with three-electrode system

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HACH LANGE 4/21


SIPAN 34

Calibration and regeneration of the oxygen sensors

The sensor is calibrated using a single point (sensor is free of resid-ual current), preferably using air. The sensor is adjusted for 100% saturation.

The calibration cycle depends on the conditions of use and the required accuracy.

The sensor must be regenerated, i.e. the electrolyte must be refilled and the membrane head replaced, if it can no longer be calibrated or if the membrane is damaged.

The microprocessor analyzer operates with a non-linear tempera-ture characteristic which is individually matched to the sensor to permit temperature compensation.


• Four-wire analyzer with extremely easy operation

• Universal power supply (24 V AC/DC, 115 V AC, 230 V AC)


• Self-explanatory menu operation in plain text in five languages (German, English, French, Spanish, Italian), without Instructions Manual, help function


• Display of µg/l; mg/l; mbar; ppb; hPa; % saturation

• Additional permanent bargraph of measuring range




• Freely-programmable, permanent measuring-point designation (saves tag labels)






• Selectable tests for: keys, RAM, EPROM, EEPROM, display




• Robust field housing (IP65) with seven cable screwed glands for easy connection

• No special or expensive mounting set required for wall or panel mounting.

Optional characteristics

• Second current output for measured value or temperature with additional limit

• Four parameter sets with remote selection for complete methods, not only for measuring ranges, e.g. also limits, physical dimen-sions, hysteresis

• Individual calibration of each parameter set possible

• Automatic cleaning function (3 relays) for cleaning, flushing, fitting control with cyclic time input, maintenance and holding functions


• Additional switching contacts for maintenance (function check) and pre-alarm (warning).

An NTC thermistor is mounted in the sensor as thermometer.


The analyzer has four complete parameter sets for four methods that can be set independently from each other. This allows an op-timal adaptation in a process when different media have to be mea-sured one after another with one line. Switchover to the correspon-dent parameter set can be controlled externally.

Method switchover

Methodnumber

1 2 3 4

Medium Biofermenter Water Biofermenter Water

Range 20 ... 30 0.001 ... 1 30 ... 400 0.001 ... 1

Dimension µg/l mg/l µg/l mg/l

Limit 30 max. 0.5 max. 300 min. 0.8 min.

HACH LANGE4/22

Liquid Analysis

SIPAN 34



HACH LANGE 4/23


SIPAN 34

Technical data

Display graphic


5 bars, 3 mm high


3-mm digitscurrent output as bargraph 3 mm high

• Operator input 8 lines of text 1 heading (inverted display) and 6 text lines, type size 4 mm


Languages 5: German, English, French, Italian, Spanish; selectable


Dimension µg/l, mg/l, mbar, ppb, hPa, % saturation

Measuring span O2 (expansion) Any, but at least 10% of smallest measuring range


Temperature compensation Dependent on sensor type

Measuring range for temperature Input: NTC: -10 to +140 °C, dependent on sensor type

Measuring span for temperature Any, but at least 10% of measuring range

Compensation of atmospheric pressure

Automatic, by barometric pressure correction or manual

Sensor calibration Manual using air

Electrical isolation Input and output are electrically isolated

Error limits

• Temperature(at rated conditions)

<0.3 K






• Power supply <0.2% of full-scale value

• Load <0.1%/100 Ω

• Test voltage 500 V AC, 50 Hz, 1 min

• Zero error <0.2% of measured value

± 1 µg/l (7MA3100-8CC, -8CE, -8CD)

± 5 µg/l (other sensors),dependent on sensor type

• Salinity correction Possible

Output signal 4 to 20 mA, floating, linear to mea-sured value or bilinear to measured value (2 linear partial ranges with a knee at 12 mA), see figure


Current limiting 0 or 21 mA (0 to 20 mA)

3.6 mA or 21 mA (4 to 20 mA)

Limit 1 NO or NC contact selectable, adjustable hysteresis and response time


Diagnostic contacts Two, pre-alarm and maintenance

Relay contacts Rating 24 V DC, 1 A

Logbook Automatic recording of warning and failure messages with date and time, 20 entries with overflow, non-eras-able




Protection According to IEC 79-15; conformity certificate


HACH LANGE4/24

Liquid Analysis

SIPAN 34


Linear and bent characteristic



















Panel mounting housing Aluminium



230 V AC (187 V ... 264 V), 48 ... 63 Hz, 10 VA

24 V AC (20 V ... 26 V), 48 ... 63 Hz, 10 VA




Options

Second output signal 0/4 ... 20 mA, linear to temperature


Parameter sets 4


Cleaning contacts with timer 3, fitting control, cleaning and

flushing



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HACH LANGE 4/25


SIPAN 34



SIPAN 34 analyzerfourwire system, for the measurement of dissolved oxygenmicroprocessor-based with illuminated graphic display, membrane keyboard, menu-based operation (5 languages), trend display, concentration display, logbook, temperature compensation, barometric pressure compensation,1 parameter set,1 signal output 0/4 to 20 mA,1 alarm contact,1 limit contact,2 diagnostic contacts

7 M A 3 0 3 4

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Power supply

• 24 V DC/24 V AC, 48 ... 63 Hz 0

• 120 V AC, 48 ... 63 Hz 1

• 230 V AC, 48 ... 63 Hz 2

Measuring procedure

• Food A

• Waste water B

• Ultra-pure water C

Instrument design

• Field housing A




1


2


3


• Without A

• With B


• Without A

• With B


Order No.



C79451A3177D12



4/26 HACH LANGE

Liquid Analysis

SIPAN 34



SIPAN


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Liquid Analysis

SIPAN 34


Schematics

SIPAN 34 analyzer, electric connections

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Welcome to HACH LANGE!

Now you have the new SIPAN catalog.

Liquid analyzers of the SIPAN series for continuous

measurement of pH value/redox potential, conductivity

and dissolved oxygen supply important data to

process control systems or process control devices.

HACH LANGE is the market leader for Liquid Analytics

in the Water/Waste water sector. With product characteristics

such as explosion protection, etc. SIPAN products will ideally

complement the existing HACH LANGE product lines to an even

more extensive product range.

Whether field or laboratory analysis, samplers or process

measurement technology, HACH LANGE stands for the total

spectrum of water analysis - from visual methods to comprehensive

systems of reagents, measurement technology and accessories.

Solutions from HACH LANGE are tailor-made for every application

in wastewater, drinking water or process water - for reliable

control of operational processes and monitoring of legally prescribed

limit values.

HACH LANGE stands for water analysis from a single source.

For you, this means more products and applications, more experience

and on-site support than ever before

Your water-analysis team at

Core capabilities.

Wastewater.

Made-to-measure solutions for

wastewater analysis in the

municipal and industrial sectors.

Drinking water.

Assured safety — analysis for

suppliers and consumers.

Process water.

Process and laboratory analysis for

special analytical problems and

production conditions.

HACH LANGE services.

Ordering, information and advice: [email protected]

Seminars and workshops: further training and exchange ofexperience for analysis in practice.

On-site support by our technicalfield staff.

Quality assurance, complete withstandard solutions, instrument checksand test solutions.

www.hach-lange.com up to date and secure, with downloads,information and shop.

Assurance of legal compliance, togetherwith environmental protection throughcollection of used reagents.

Reliable operation of all instrumentsthanks to flexible service andmaintenance contracts.

Regular customer information by postand email.

WW

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HACH LANGE GMBHWillstätterstraße 11D-40549 DüsseldorfTel. +49 (0)2 11 52 88-0Fax +49 (0)2 11 52 [email protected]

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SIPAN LIQUID ANALYSIS

SIPAN 32 and 34Controllers and Sensors for pH, Conductivity and O2

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