EOP-D65-002-041-05E EL-700A 取説(英文) · EOP-D65-002-041-05E E.J. OZONE PRODUCTS INSTRUCTION...

EOP-D65-002-041-05E

E.J. OZONE PRODUCTS

INSTRUCTION MANUAL

DISSOLVED OZONE MONITOR Model EL-700A Detector Unit

Published on March 02, 2012

EBARA JITSUGYO CO., LTD. MEASURING INSTRUMENT

AND MEDICAL DIVISION

MEASURING INSTRUMENT SALES DEPARTMENT

EAST JAPAN SALES BRANCH WEST JAPAN SALES BRANCH

:

:

3-12, Kurigi 2-Chome, Asao-ku, Kawasaki-shi, Kanagawa, 215-0033 Japan Tel. +81-44-981-0560 Fax. +81-44-981-0561E-mail [email protected] 2-13, Hiranocho 3-Chome, Chuo-ku, Osaka-shi, Osaka, 541-0046 Japan Tel. +81-6-6231-3528 Fax. +81-6-6231-2929E-mail [email protected]

TECHNICAL ENGINEERING DEPARTMENT

3-12, Kurigi 2-Chome, Asao-ku, Kawasaki-shi, Kanagawa, 215-0033 Japan Tel. +81-44-981-0560 Fax. +81-44-981-0561E-mail [email protected]

EOP-D65-002-041-03E/a

E.J. OZONE PRODUCTS 1

Introduction

This time, we are pleased that you have purchased our ozone monitor, Model EL-700A made by Ebara Jitsugyo Co., Ltd. This instruction manual is made out in order to install the system-in type ozone monitor correctly and to use the monitor sufficiently, so that the important message upon the application is described in this manual.

The ozone monitor, Model EL-700A is possible to measure ozone concentration easily only by connecting the EC-755 which is indicator & control unit.

Users are required to read this manual carefully before using the UV ozone monitor and related instruments. And then, regarding precautions in the matter of safety, refer to the following marks and their descriptions, and also see giving attention to the next “Dangerous Characteristics for Ozone Treatment” and “Caution items when put the monitor (densitometer) in use”.

Important Safety Message

Note 1: The serious injury indicates the injury such as sight loss, hurt, burn (hot or cold), electrical shock, fracture and toxic reaction which leaves after-effects or requires hospitalization or long-term outpatient treatment for cure.

Note 2: The minor or moderate injury indicates the injury such as burn and electrical shock which does not require hospitalization or long-term outpatient treatment for cure, and the material damage indicates the damage which may lead to property damage or product failure.

Mark Description

DANGER DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING WARNING indicates a potentially hazardous situation which,

if not avoided, could result in death or serious injury.

CAUTION CAUTION indicates a potentially hazardous situation which,

if not avoided, may result in minor or moderate injury.

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DANGER

Dangerous Characteristics for Ozone Treatment

Ozone has powerful oxidation effect, and it is used for many kinds of substance by the reaction, such as Oxidation/Dissolution, Sterilization and etc, but it is also informed that Ozone has ‘Toxicity’ for human bodies. Therefore, any exposure by Ozone should be free from the leakage on the piping connections for Ozone sampling system and/or the wetted parts, and also the related equipments. The following table shows the effects, for Ozone concentration to human bodies.

Biological influences caused by ozone

Ozone concentration

[ppm] Influences

0.01 ～ 0.02 Sensible odor (with the sense of smell becoming gradually accustomed to the smell)

0.1 Strong odor stimulant to the nose and throat. 0.2 ～ 0.5 Eyesight weakens by 3 to 6 hour’s exposure.

0.5 Apparently stimulant to the upper respiratory tract.

1 ～ 2 Exposure for 2 hours presents a headache, a pain in the chest, and thirsty at the upper respiratory tract and coughing.

Repeatable exposures will lead to chronic toxicities. 5 ～ 10 Increase of pulses and pulmonary edema will be caused. 15 ～ 20 Small animals will die within 2 hours.

50 Life of man will be jeopardized in one hour.

‘Report on Ozone Processing’ by Japan Water Works Association, August 1984, P. 40 Threshold limit value: Japan

USA : 0.1 [ppm] (recommendation by Japan Association of Industrial Hygienists)(2006) : 0.1 [ppm] TLV of TWA by ACGIH (1993 － 1994) ＊

＊ TLV

TWA

ACGIH

: Threshold limit value

: Time Weighted Average Concentration

: American Conference of Governmental Industrial Hygienists

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DANGER

This instrument is not designed to be explosion proof. Using the ozone monitor in a location where flammable or combustible gas is present can cause explosion. Never use the ozone monitor in such locations.

Never introduce a sample gas which has high pressure than its specification limit into the monitor. It can cause each container and part to be damaged or disrupted, which results in ozone leakage.

WARNING

If there are ozone smell, confirm whether the ozone monitor has enclosure crack, piping damage and slackness on joints or not after power switch was turned off.

The monitor has a high voltage power source for igniting the mercury lamp use (normal condition: typical 200 V AC and when ignition: typical 1000 V AC at a moment). As you may have an electric shock when adjusting and/or repairing the monitor, it is recommended to perform its works with a specialist.

UV rays emitted from the low-pressure mercury lamp may harm your eyes and skin. Do not attempt to take the low-pressure mercury lamp out of the holder or look at it while it is turned on.

CAUTION

When replacing the parts and also when connected and disconnected the interface cable (cable for connecting the multi-point controller, Model EC-755), it should be performed after when power supply was stopped. And then, take care so as not to give mass of the cable on the monitor. The monitor may have a trouble if it is used under condition when the cable is pulling and/or adding with the excessive force. Regarding connector, it should be surely fixed with screws and also fixed the cable mount by using the union band.

Do not affect a shock and /or vibration to this monitor, this instrument is a precise equipment.

Regarding accident and trouble that had happened as a result of remodeling or modifying the monitor, we cannot take the responsibility, even if it is in the warranty term.

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CAUTION

Caution items when put the monitor (densitometer) in use

Sealing materials such as joint and packing etc. which are used in the monitor, are not intended to be effective permanently. These materials are deteriorated by ozone gas and other material and this may cause in ozone gas leakage. Perform the increased tightening of the joints and check and replace these materials regularly (every 1~2 years) by our service man.

When confirmed ozone leakage or if smelling the ozone, please check the related equipments contained with the monitor at once. In case of installing dissolved ozone monitor, consider about ozone leakage so as to set a drain pan at the bottom for pre venting its magnification of flow out.

Withstand pressure force in the monitor has its limit. Never introduce into the monitor a sample of which pressure is higher than the limit. Otherwise, it would cause a leak. Don’t forget to check the pressure specifications of the monitor and to perform periodical inspections.

The low-pressure mercury lamp as consumable part contains harmful component to the humans, so that the used lamp should be scrapped in accordance with your local regulation.

In case of removing the monitor from the related device when maintenance and etc, confirm that there is not the residual ozone (the indicating value of the ozone concentration is 0) and perform the works after when the power supply shut down. Still more, even for replacing the parts, perform this works after turning off the power supply surely.

If the sample water contains materials other than ozone, such as hydrogen fluoride and moisture, the inner part of the monitor which is exposed to water may be eroded, damaged or clouded. In case that the monitor had trouble and it becomes impossible to measure ozone by influence of another material, take care that the monitor will not be guaranteed, even if it is in the warranty term.

When a sample gas measurement is finished, it should be discharged after decomposing ozone.

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Contents

1 General description .............................................................................................................................7 2 Measuring principle ............................................................................................................................7 3 Specifications .......................................................................................................................................8 4 Description of each position ..............................................................................................................11 5 Function.............................................................................................................................................12

5.1 Function of taking off the bubble ..................................................................................................12 6 Function.............................................................................................................................................12

6.1 Sapphire cell ..................................................................................................................................12 6.2 Length of interface cable ...............................................................................................................12 6.3 Introduction of purging the air .....................................................................................................12

7 Requirements of installation .............................................................................................................12 7.1 Requirement of installation and how to install .............................................................................12 7.2 How to install the monitor.............................................................................................................13

8 Measuring procedure ........................................................................................................................17 8.1 Preparation before the measurement............................................................................................17 8.2 Measurement .................................................................................................................................17

9 Span calibration ................................................................................................................................18 10 Maintenance and inspection..............................................................................................................19

10.1 Preparation before the measurement............................................................................................19 10.2 Consumable parts ..........................................................................................................................20 10.3 Replacement of consumable parts.................................................................................................21 10.4 Trouble shooting ............................................................................................................................25

11 Warranty ...........................................................................................................................................26

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Illustrations

Figure - 1 Logic diagram ......................................................................................................................7 Figure - 2-1 Outside appearance of the enclosure with small caliber joint........................................... 11 Figure - 2-2 Outside appearance of the enclosure with large caliber pipe............................................ 11 Figure - 3 Installing pitch ...................................................................................................................13 Figure - 4 Direction of installation......................................................................................................13 Figure - 5 Connecting of the interface cable.......................................................................................14 Figure - 6 Maintenance space .............................................................................................................14 Figure - 7 Example of the piping connection......................................................................................16 Figure - 8 Removing the front cover...................................................................................................21 Figure - 9 Removing the lamp cover...................................................................................................22 Figure - 10 Replacement of mercury lamp...........................................................................................22 Figure - 11 Lamp cover.........................................................................................................................22 Figure - 12 Connector for electric power of lamp................................................................................22 Figure - 13 Position of Trimmer on the PCB........................................................................................24 Figure - 14 OUTLINE DRAWING of EL-700A-04 (1/4 inch)..............................................................27 Figure - 15 OUTLINE DRAWING of EL-700A-06 (3/8 inch)..............................................................28 Figure - 16 OUTLINE DRAWING of EL-700A-08 (1/2 inch)..............................................................29 Figure - 17 OUTLINE DRAWING of EL-700A-12 (3/4 inch)..............................................................30 Figure - 18 OUTLINE DRAWING of EL-700A-16 (1 inch) ................................................................31

Lists

Table - 1 Inspection items..................................................................................................................19 Table - 2 Consumable parts list.........................................................................................................20 Table - 3 Trouble shooting.................................................................................................................25

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1 General description

This equipment is a small size and light weight dissolved ozone monitor with the possibility of In-line type continuous measuring and it is composed of EL-700A detector unit which can detect ozone in water and EC-755 control unit which can indicate ozone concentration and also control the detector. It is mainly attached to the ozone supplying devices for study experimentation or process control and is developed and manufactured to monitor ozone concentration as main object.

The equipment is not necessary to measure the follow-up zero as it is usual equipment. Regarding zero correction, as the equipment introduces zero water into it at when electric power is switched on, and in others, it is performed once a day, it can be measured ozone concentration in steady state. Zero correction is possible to adjust zero point simply and also regularly by using outside signal to EC-755 or switches on the front panel. A corrected value to the zero point is keeping even if electric power is switched off.

Regarding of correcting sample water, it should be collected if the supplying source has its water pressure, a piping can be connected directly from the spot to the detector, and when has not the water pressure, a pump must be used.

2 Measuring principle

This equipment is an UV absorption type ozone monitor which detects and measures quantity of absorption of UV rays by ozone in the sample water introduced into the detector. A low-pressure mercury lamp (emission wavelength 253.7 nm) is used for the light source. As the quantum of light absorbed by ozone existing within the optical path ‘T’ obeys the Lambert-Beer’s Law, concentration of ozone can be measured as follows.

A Ｉo C = × log αT Ｉx where : C α T I o I x A

= Ozone concentration = Specific absorption coefficient = Path length of cell = Light intensity through the sample free of Ozone = Light intensity passed through sample Ozone = Constant

ozoneＴ

sensor１

lamp

sensor２

Figure - 1 Logic diagram

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3 Specifications

Model & Product name Fundamental model

Note

Measuring principle

Service Measuring ranges

Note Measuring method

Note Sampling method Flow rate

Note Span drift Zero drift Linearity

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:

Dissolved Ozone Monitor, Model EL-700A Detector Unit EL - 700A - ××

In the above ×× marks, it makes an entry of codes for piping size which is attached to this detector unit. -04 : 1/4 inch pipe with fitting for connecting small size caliber -06 : 3/8 inch pipe ditto -08 : 1/2 inch pipe ditto -12 : 3/4 inch pipe with fitting for connecting large size caliber -16 : 1 inch pipe ditto

UV absorption method dissolved ozone without impurities selectable in the following measuring range 0 ~ 5, 0 ~ 10, 0 ~ 20, 0 ~ 30, 0 ~ 50, 0 ~ 60, 0 ~ 100 mg/L

Please specify your suitable range when its order. Regarding other concentration range, please consult us when your inquiry. continuous measurement

Please confirm and adjust zero point with material water previous supplying ozone water. inserting with water pressure or by the sucking pump different by the following pipe size -04 (1/4 inch) : 0.3 ~ 2 L/min -06 (3/8 inch) : 0.5 ~ 5 L/min -08 (1/2 inch) : 1.5 ~ 10 L/min -12 (3/4 inch) : 3.0 ~ 20 L/min -16 (1 inch) : 5.0 ~ 40 L/min

Ozone measuring is possible on condition that it is less than each flow range. However in the above condition, it may have low concentration by destructing phenomena of the ozone or its corresponding speed may become late. within±1 % FS/month within±2 % FS/month within±1 % FS

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Repeatability

Note Zero correction Offset adjustment Span adjustment Process wetting

materials

Note

Note Connecting mouth

of piping

Normal pressure

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:

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1 % FS or less

However, perform zero point adjustment after one hour over from when power was turned on. And thereafter, perform zero point adjustment once a day. The above specifications are applicable to conditions less than ambient temperature variation ±3 °C and sample water temperature variation of ±3 °C. Zero correction of this ozone monitor can be performed with a panel operation on the control unit, Model EC-755 or using outside signal and/or with its built in timer. Be sure to introduce sample water without ozone at all. When performing zero correction by the internal timer, the magnetic solenoid valve could be operated by its operational signal. When containing the interference components and etc., the ozone monitor can be indicated to the suitable value by adding or reducing the measuring result. By putting the numerical value into the control unit (EC-755) directly, it is possible to set up to ±Full scale. digital setting (in an inclement of 0.1 %) but, from the control unit, Model EC-755 Super PFA, quarts, PTFE material of fitting (Only small size caliber model, by its manufacturer)

Deterioration and corruption of the materials by ozone reaction is not our duty for warrant.

If the sample water contains materials other than ozone, such as hydrogen fluoride and moisture, the inner part of the monitor which is exposed to water may be eroded, damaged or clouded. In case that the monitor had trouble and it becomes impossible to measure ozone by influence of another material, take care that the monitor will not be guaranteed, even if it is in the warranty term. selectable from the following table

additional code no.

pipe size

Super 300 P series fitting made by Nippon Pillar Packing

Final lock fitting made by Kurabo

20 series fitting made by Flowell

- 04 1/4 inch 〇〇 not applicable

- 06 3/8 inch 〇〇〇


- 12 3/4 inch

- 16 1 inch

Attaching the connecting pipe （Super PFA tube）

0.3 MPa(G) or less

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Max. withstand pressure

Note

Note Environment Temperature of

sample

Note Mass Outside dimension

Note Installation pitch Power supply Interface cable

Note

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0.7 MPa(G) or less

The normal pressure and maximum withstand pressure become to be the decided value on condition that the water temperature and ambient temperature are in their specific temperature range (5 ~ 40°C). If the monitor is used in the different range from its temperature specification, it could result in leakage trouble because the materials such as seal portion, fitting and piping made of PFA/PTFE have much expansion or compression by temperature change. And then, it is confirmed that PFA/PTFE has a permeable character for ozone gas, so that its gas can be permeable though the optical cell block and will make to corrode the parts inside of the monitor when using it on condition that ozone has too much concentration (more than 100 mg/L) and also the pressure is applied. At that time, to prevent the phenomena, it can be done to purge the ozone gas in the monitor by a purge air. Still more, for the details, please consult us.

This instrument is not designed to be explosion proof. 5 ~ 40°C, 80% RH below (not condensed) 5 ~ 40°C

In case that the monitor is used under 10°C, please consult us. To prevent the dew-drop, flowing the purge gas according the degree of Humidity is necessary. Please refer to Item 6.4 “Introduction of purging the air”. different from pipe size ● enclosure with small caliber (1/4~1/2 inch): 0.9 kgf (typical) ● enclosure with large caliber (3/4~1 inch): 1.1 kgf (typical) two kinds from pipe size (unit: mm) ● enclosure with small caliber (1/4 ~ 1/2 inch) : 84 W × 115 H × 80 D ● enclosure with large caliber (3/4 ~ 1 inch) : 84 W × 126 H × 80 D

But projection and leg are not included. Refer to figure - 12 ~ 16 “OUTLINE DRAWING”. 95 × 50 (unit: mm), with screw of M4 from the control unit, Model EC-755 3 m (standard products)

This is cable in order to connect control unit, Model EC-755 and detector unit, Model EL-700A. Regarding cable length in the above, refer to optional item.

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4 Description of each position

Figure - 2-1 Outside appearance of the enclosure with small caliber joint (drawing shown with Super 300P 3/8 inches fitting made by Nippon Pillar Packing)

Figure -2-2 Outside appearance of the enclosure with large caliber pipe

① inlet for sample ② connecting port for interface cable: connected with EC-755 using the cable ③ cable mount: This is cable mount for fixing interface cable. It is fixed with union band. ④ port for getting the synchronized signal from electromagnetic valve (optional) ⑤ front cover ⑥ screw for fixing the front panel ⑦ top cover ⑧ installing leg ⑨ earth terminal

⑦

⑥

⑤

③

②

④

⑨

①

⑧

⑦

⑥

⑤

③

②

④

⑨

①

⑧

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5 Function

5.1 Function of taking off the bubble

This means that Optical cell has organization for avoiding the bubble. As this dissolved ozone monitor, EL-700A has organization of avoiding the bubble which is generated in optical cell, so that the monitor can measure dissolved ozone concentration without influence of bubble in ozone water.

6 Function

6.1 Sapphire cell

The optical cell is changeable from Quartz to one of Sapphire based on your optional order.

Note : This is not the material which is warrant eternally, and then, it has not also limited of a guarantee that corrosion and corruption on the cell which is occurred with complex condition made from other component.

6.2 Length of interface cable

You can choice one of cable, 1.5 m, 5 m, 10 m, 20 m and 50 m when your optional order (standard length 3 m).

6.3 Introduction of purging the air

Also it is used in case that is in low temperature and dew drop is expected. Pour dried air into inlet for purging the air. Its suitable flow rate is 0.1 ~ 0.3 L/min limit. Regarding air compressor for use, it should be one of oil-less type so as not to enter dust and mist into the compressor. The attachable piping size is O.D. 6 mm, and its coupling is one-touch method type.

7 Requirements of installation

7.1 Requirement of installation and how to install

In order to protect the monitor from any damage and to ensure stable operation, installation at places as shown below should be avoided.

(1) Dusty place or any place where such corrosive gas as hydrogen sulfide gas, sulfurous acid gas, or halogen gas is floating in the atmosphere.

(2) A place having characteristic of high temperatures, high humidity or a place of radical temperature changes.

(3) A place with characteristic of strong vibrations or heavy intermittent vibrations.

(4) Places under direct sun shine.

(5) A place close to the source of generation of a strong electromagnetic field, electric field or a high frequency.

(6) A place lacking a sufficient space for maintenance and/or inspection of the monitor.

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(7) Process plant where explosive gas may be made up in the environment.

(8) Outdoor setting of the EL-700A detector

DANGER

This instrument is not designed to be explosion proof. Using the ozone monitor in a location where flammable or combustible gas is present can cause explosion. Never use the ozone monitor in such locations.

7.2 How to install the monitor

(1) Mounting the monitor

Mount the monitor in the place which can be fully taken in order to connect the piping and wiring. The installing pitch is 50Ｘ95 mm, and its size of mounting hole is M4. Figure - 3 Installing pitch

(2) Direction of installation

To install the monitor has two possibilities as it is shown in Fig.-4 Direction of installation.

Floor installation : This installation has not directional characteristic for flow-channel.

Wall installation : On characteristics of the bubble, it will flow from the bottom to one of the top, inlet of the sample water would be mounted so as to become lower. Figure - 4 Direction of installation

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CAUTION

When bubbles get mixed in a small size caliber model (1/4 - 1/2 inch) and use it in the vicinity of the lower limit of the flow rate range, bubbles stay in the monitor, and there may not be measuring ozone precisely when establish floor installation. Please use it in wall installation.

(3) Connecting of the interface cable

Connect this cable to its inserted port which is located at the side of monitor. At this time, perform surely fix it to the cable mount with union band.

CAUTION

When wiring the cable, take care of that mass of this cable will not affect the monitor (control unit). If pull the cable or when using it in case of applying an unjust force, it may cause in failure.

Figure - 5 Connecting of the interface cable

(4) Maintenance space

Prepare the maintenance space as it is the drawing of Fig.-5 and remove the front cover. The maintenance works such as removing the lamp should be performed, please put the detector unit as it is possible to remove the equipment. Regarding dimension in Fig.-5, the

minimum bending radius is not in consideration of the piping.

① Front face, right side face and top face are used in maintenance works. For front face, to inspect and operate the detector unit needs its maintenance space.

Figure - 6 Maintenance space

② To prevent an equipment covered with water, do not install it under water piping.

③ Avoid to install the electrical apparatus and its wiring under this detector unit, so as not to covered with water.

fixing with a union band

200

80200

front face

right side face(interface

cable side)

upper direction：200mm

80

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(5) Connecting the piping for sample

Connecting method to the piping is differing in each model code of the detector unit, so as to be large caliber or small caliber (see the following table). If connected each piping with much difference, much pressure more than ones of the same caliber is applied by pressure loss and also it may has a possibility to become source of the bubble. Use the pipes as same as possible in connecting the each one to prevent the density decline by destructing phenomena of the ozone, and supply and drain the ozone water.

① Install a stop valve having withstand ozone characteristics between diverging point of sample

water and inlet of the detector unit, and perform work so that it can stop sample water and also can adjust its flow-rate. If equip the flow-meter, as you can confirm the flow-rate, it is convenient. To install the filter will avoid dust for mixing the sample and make to reduce generation of failure.

② Be sure to use ozone registration materials for piping/fitting and valve. And then, regarding piping, make it with very few vending position in the distance as short as possible.

③ Perform the piping so as not to add force on the fitting.

④ When changed material water or also when using the monitor for long term, perform regularly to adjust zero point by supplying water without ozone.

⑤ When water temperature is low (less than 5°C) in comparison with ambient temperature may sometimes put out of order for indicating the measured value because surface of the optical cell will make a dew drop. Perform to rise its water temperature or reduce the room humidity so as not to make the dew drop. In case of performing the measuring in these environments, please consult with us (our company) about this problem.

classified caliber

additional code No.

pipe size

Super 300 P series fitting made by Nippon Pillar Packing

Final lock fitting made by Kurabo

20 series fitting made by Flowell

- 04 1/4 inch 〇〇 not applicable


small caliber


- 12 3/4 inch large caliber - 16 1 inch

Attaching the connecting pipe (Super PFA tube)

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Figure - 7 Example of the piping connection

Case 1 : In case of sample water without pressure, it must be sucking by using the pump. Regarding the pump, a by-pass valve (needle valve) should be installed in parallel with it and perform to adjust its flow-rate. Even if the pump is installed at the place before the detector unit, its measuring is possible. And then, it is convenient to install a flow-meter between the detector unit and its pump because flow control can be done.

Case 2 : In case that there is much flow rate in the main piping, the measuring is performed as sampling method. And then, install a needle valve and etc. and perform to adjust the flow rate, so that ozone water can not flow in excess. In the other way, if the flow-rate is too little, please take care that ozone has destructed in the piping and the detector unit may have to measure the corrected concentration value.

Case 3 : When all quantity of ozone water is flowed, it can be measured in condition that a needle valve is installed for maintenance.

(6) Connecting of the earth cable

Please use the earth cable which is higher than thickness AWG18( 1.02mm in diameter). ※ It is not grounding for safe protection. The detector side, after having performed crimp of round solderless terminal (M4.3 use), please

connect the earth cable using earth terminal (M4). The connection of the grounding side, after having performed crimp of round solderless terminal suitable for the thickness of the earth cable, please connect the earth cable to ground terminal of the device or frame GND (F.G).

P

valve

pump

by-pass valveCase 1: on condition without water pressure

Case 2: on condition with water pressure as sampling method

Case 3: on condition with water pressure as in- line methodvalve

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CAUTION

When use sample water (example; pure water) which static electricity is easy to produce, please ground by all means. Otherwise, electrostatic charged phenomenon is caused in a measuring portion (cell block) and the plumbing department of the detector, the indication of the monitor disappears and may malfunction.

8 Measuring procedure

8.1 Preparation before the measurement

(1) The detector unit, EL-700A and its control unit, EC-755 should be connected with interface cable. In this working, be sure to confirm that the electric power is not supplied to the control unit (if supplied, the equipment may have defect).

(2) Make to flow the zero water after confirming the fitting having no slackness.

(3) Supply power source (24 V DC) to EFC-755 control unit of the monitor, and then, its detection unit EL-700A is supplied with this power. Then, the internal electronic circuit becomes to be operated and it will light the mercury lamp.

(4) The warming-up operation (10 minutes) is started soon (leave the detector unit on condition that zero water is flowing).

(5) Perform to adjust the zero point after warming-up operation. ※ Refer to an instruction manual of EC -755.

8.2 Measurement

(1) Supply ozone water to EL-700A detector unit, and start to measure ozone concentration.

(2) Ozone concentration value and each kind of signal outputs become outputs from EC-755 control unit.

~ In order to measure in steady state ~

10 minutes for warming-up operation is the minimum required time till a low-pressure mercury lamp in the detector unit, EL-700A becomes to be in steady state. If required that it is more steady state in order to have measuring & detecting, it should be perform zero correction again after passing three hours over from when power was turned on, and also perform zero correction once a day. Still more, even if the monitor is not used for long term, it is recommended that the monitor is always supplied with power source.

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CAUTION


9 Span calibration

As this equipment was designed and manufactured paying attention to take a high stability on the electronic circuit operation and still more the monitor was calibrated when shipping so that changing the calibration ratio and/or adjusting the equipment is not required over again. If the measured value is different from value that it is gotten by analyzing the Ozone water and if it has to fit the analyzed one, perform its calibration according the following procedure.

(1) Perform zero correction according to “Preparation before measurement, item 8.1”.

(2) Supply ozone sample water to the detector unit, EL-700A.

(3) The measured value should be recorded after when indication of the monitor becomes to be in steady state.

(4) Perform the analyzing ozone water, and fit the indicated value to one of analyzed ozone. For detail, refer to the following. And yet, adjustable span range is ‘0.001’~ ‘2.000’and its adjustable minimum value is 0.1 % notch of full scale.

Span of this equipment is calibrated and adjusted when shipping. When there is difference between measured value of sample water and your one of analyzed ozone, value of span calibration ratio on the span setting display appeared when pushed enter switch (see item 4.1 (2) “Setting mode” on the instruction manual, EC-755) as formula of the new calibration ratio is,

“your analyzed value ÷ measured concentration value” × “old span calibration value on the display”. Example of calculation where;

Indicated concentration value ······································· 20.2 mg/L Analyzed value ································································· 18.3 mg/L Span calibration ratio when shipping ·························· 1.021

Thus, new span calibration ratio = 18.320.2 × 1.021 ≒ 0.925

In this case, span calibration ratio of this monitor should be revised to ‘0.925’.

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(5) There is the following method in order to analyze the ozone water.

① Look for concentration by performing the chemical analysis. • Collect sample used for chemical analysis. And at the same time, record indication on

the control unit of monitor. • Perform chemical analysis of collected sample by using Iodometric method or another

one.

② Measuring instrument (standard unit) that the chemical analysis performed and also confirmed, is put in the same flow channel and fit the indicating value on the monitor to one of this standard unit.

(6) Span calibration ratio of this equipment is shown on the name plate of EL-700A control unit and

monitor test report when it’s shipping. Please refer to them if you use the value when shipping the monitor.

10 Maintenance and inspection

10.1 Preparation before the measurement

Table - 1 Inspection items

Items of inspection Inspection time

Check of light intensity for low pressure mercury lamp

Sensor 1 & 2 of the suitable range is in 500 ~ 4000. If becomes less than 500, recommend to replace the lamp quickly.

Confirming Zero point 1. once a day 2. Before starting measurement after when the power is on.

Span check arbitrary

The light intensity of the low pressure mercury lamp will decrease over time of use, eventually

presenting such a symptom that zero level adjustment is no more possible or unsuitable indications.

Light quantity just after when the equipment is delivered or also when replaced that the low pressure mercury lamp is set so as to come to 2700 ± 300 when warming-up operation is performed over than 3 hours (in case of ambient temperature 25 ± 2°C). This is increased or decreased with much light quantity by influence of ambient temperature.

Regarding lighting the lamp after leaving it for long term, take care that measurement value will fluctuate for sometime after finishing the warming-up operation.

To stock the mercury lamp for long term may sometime cause in its deterioration. We recommend replacing the lamp regularly.

Regarding replacing the mercury lamp, we recommend to replace it once a year as standard.

The used mercury lamp should be scrapped in accordance with your local regulation.

EOP-D65-002-041-05E


10.2 Consumable parts

The each part used in the detector unit, EL-700A, has an operation life. And then, deterioration and/or corruption of materials by ozone reaction are out of our duty for warranty. Warranty term of all parts is 12 months after when your delivery.

Table - 2 Consumable parts list

Product

name

Goods code quantity

/unit

Replacement

term

Remarks working

level

low pressure

mercury

lamp

BZ 104A 1 pc Every 2

years

The mercury lamp has a life, so

that it may have a drop of light

quantity or it may allow the lamp

not to give light.

possible to

replace by

user

O-ring

(PTFE)

NO 050A 2 pcs at any time

O-ring for

back-up ring

(Echo-Perflu

oro)

NO 085A 2 pcs at any time

As sealing characteristics will

decrease by ozone reaction, it

should be replaced when

maintenance.

Optical cell different

from

concent-ratio

n range

1 pc at any time

Cell block different

from piping

size

1 pc at any time

Contamination in the sample

water will attach on the cell or

corrosion & corruption may

sometimes occur by another

material except ozone. If it will

be existed, correct measurement

or zero correction is not

performed.

When this detector unit has

much corrosion and stain, it is

needed to replace this cell block.

UV sensor BZ 072B 2 pcs at any time Sensing change or deterioration

will occur under using condition.

Needed to be replaced once for 4

~ 5 years.

PCB ― 1 set at any time Every part on the PCB has a life.

necessary to

replace by

our service

man

CAUTION


EOP-D65-002-041-05E


connector for electric power lamp

fixing screws for lamp coverlamp cover

10.3 Replacement of consumable parts

(1) Replacement of mercury lamp

WARNING

Be sure to work in state of power off, because you may have an electrical shock.

After turning off the power source, the mercury lamp is heating in high temperature, do not work after about 20 minutes.


UV rays emitted from the low-pressure mercury lamp may harm your eyes and skin. Do not attempt to take the low-pressure mercury lamp out of the holder or look at it while it is turned on.

① Turn off the power source supplying to EC-755 (control unit).

② Remove the fixing screws (4 pcs) on the front cover, and take off the cover.

Figure - 8 Removing the front cover

③ Using with precise minus driver (approx. 2.0 mm at the tip), loosen the connector screw for electric power lamp and remove its cable.

④ Remove the fixing screws for lamp cover and also remove the lamp cover.

EOP-D65-002-041-05E


fixing screw for lamp

mercury lamp (at the rear side)

outlet for cable

face used with driver

(front side)

Insertion mouth of cable

Figure - 9 Removing the lamp cover

⑤ Remove the fixing screw for lamp and then take out mercury lamp which is equipped on its back side of PCB.

⑥ Fix a new lamp with a screw and take care the wiring of lamp so as not to put it between its cover and the screw. At this time, pay attention so as not to stick oil and fats such as fingerprint on the surface of glass of the mercury lamp, PCB and fixing portions for the detector. If attached them, wipe off the points with no dust paper having alcohol.

Figure - 10 Replacement of mercury lamp

⑦ When fix the lamp cover, take out lamp cable from outlet, so that lamp cable may not be held with the cover.

⑧ Connect lamp cable to the connector for electric power of lamp. After fixing wirings, do confirm not to pull it up easily.

Figure - 11 Lamp cover

Figure - 12 Connector for electric power of lamp

⑨ Regarding reassembling of this, perform it in reverse procedure.

EOP-D65-002-041-05E


WARNING and CAUTION

A low-pressure mercury lamp is in state of high temperature after power turned off. Handle it with paying much attention to it till after when the temperature has decreased.

UV rays emitted from the low-pressure mercury lamp may harm your eyes and skin. Do not attempt to take the low-pressure mercury lamp out of the holder or look at it while it is turned on. When working with the monitor, the anti UV ray glasses should be used.

The low-pressure mercury lamp as consumable part contains harmful component to the humans, so that the used lamp should be scrapped in accordance with your local regulation.


(2) Adjustment of intensity of light

Basically, this monitor is not needed to adjust light intensity. But in some case when replacing a mercury lamp, it may need to be adjusted light intensity. If

indicate error after replacement of mercury lamp, perform to adjust this instrument in accordance with following procedure. And when it does not appear, it can be used with no problem.

The tools which it is necessary: driver and precious minus driver 1.0 mm (extra fine)

① Perform warming-up operation for over than one hour with the front cover. (In case of doing the adjustment, perform warming-up operation sufficiently till the instrument becomes to be in steady state.)

② Indicate sensor 1 (S1) for light quantity of the indicator. At this time, it’s adjustment is not needed if the indicating value of light quantity value is 2700±300.

③ Turn a trimmer VR1 (see figure - 11) with precise driver and set the light quantity value to 2700±100. Three sheets of PCB are assembled in parallel inside of it and trimmer is assembled on the top of all.

④ This will make to indicate light intensity of sensor 2 (S2) on the indicator. Turn VR2 with precise driver and set the indicated light intensity to 2700±100.

EOP-D65-002-041-05E


CAUTION

The indicating value of light intensity when adjustment, ambient temperature is 25±2 °C.

As light intensity will change, if the indication value of light intensity is setting to 2700 in lower temperature than the above, this instrument will become error when the temperature increased. So be careful about this matter.

There is a possibility that inside of the cell has a stain, when the indication value of light intensity before its adjustment, is the half value or less as compared with the one of sensor 1 (S1). Please have an inspection by any specialist.

Figure - 13 Position of Trimmer on the PCB

⑤ With the above, adjustment of intensity of light is finished now. Start measure after shutting the front panel.

trimmer VR2 (S2) : at the third place from the right

trimmer VR1 (S1) :at the first place from the right

EOP-D65-002-041-05E


10.4 Trouble shooting

Table - 3 Trouble shooting

Symptom Cause Confirmation & Correcting action Mercury lamp burned out.

Confirm the light quantity value of sensor 1 & 2.

Replace the mercury lamp, if the light quantity becomes to be lower than 500. Refer to 10.3 (1) “Replacement of mercury lamp”.

impossible to perform zero correction.

spotted of optical cell There is a possibility for spotted of the cell, if the light quantity value of sensor 2 (S2) is lower than half in comparison with sensor 1 (S1).

If the sample water contains materials other than ozone, such as

hydrogen fluoride and moisture, the inner part of the monitor which is

exposed to water may be eroded, damaged or clouded.

When it is not improved, you must change a cell. Please contact us.

Mercury lamp has its ignition failure.

Turning on the lamp becomes to be not in the steady state. The mercury lamp has a tendency which it becomes unsteady regarding the used times. Replace the mercury lamp. Refer to 10.3 (1) “Replacement of mercury lamp”. (Still more, if the lamp is not in steady state, after when turn off the power once, there is the case that this phenomenon may sometimes resolve.)

Indication value will not come to steady state.

When measuring ozone water, the bubble is mixed.

This instrument has a function which will avoid the air bubbles, but they have too much quantities, it may have the chance which it becomes to be pulse noise and this will make the indication to unsteady state. When the indication is not in steady state, cope it in accordance with the procedure.

① Regulate the flow-rate Confirm flow-rate on the specification after it should be adjusted, so that inside of the monitor may not become minus pressure. It becomes easily to generate bubble in such case.

Attach a needle valve and flow-meter referring the Fig.-6 “Example of the piping connection”. When perform sampling by sucking pump, attach outside a needle valve at outlet side of the monitor, and when use its water pressure, it should be install at inlet side of the monitor. Then, adjust flow-rate by a needle valve in accordance with indication of the flow-meter.

② The cell of this instrument is designing for avoiding the air bubbles, but this function has its limit. If the flow-rate is not regulated in the above, attach the device for reducing the air bubbles.

EOP-D65-002-041-05E


Symptom Cause Confirmation & Correcting action The flow-rate is not enough (small).

Specified flow-rate of EL-700A is different by its piping. This could measure concentration even if its flow-rate is lower than one of specified value, however it may have indicate lower value than the actual one, and also its responsibility speed becomes late.

The indication value will display in low than the one of the actual value.

Zero adjustment is shifted.

Perform zero adjustment in the state by flowing zero water without ozone. If perform it in condition by flowing ozone water, the concentration value will not indicate its zero point, and the reference becomes in mistake because that ozone may shift it. Deterioration of sensitivity of sensor, spotted cell and ambient temperature may shift zero point, adjust zero point once a day.

11 Warranty

Our products are warranted for 12 months from the date of delivery. However, note that the following cases are not covered by this warranty.

◇ Following failures or damages occurred within the warranty period.

① Failure caused by misuse. ② Failure caused by inappropriate repair or modification using non-genuine parts. ③ Failure or damage occurred during transportation or by drop after delivery. ④ Failure or damage resulting from fire, brine, gas, earthquake, wind, flood, lightning,

abnormal voltage or other natural disasters. ⑤ Failure caused by degradation of consumable parts (packings or seals).

Well, we can not warrant you for defects of the related devices, injury of human body and your any loosed profits even if when their in and out of guarantee terms.

◇ Others

(1) Contact the dealer when repair is needed. (2) This instrument is repaired at our side after it is sent from the user. (3) The minimum storage period of repair parts and necessary parts for this instrument is

seven years after discontinuation of the instrument’s production. * The “repair parts and necessary parts” stated here means the parts required to keep

the product performance. (4) The coverage of warranty for any event that has not occurred in the past is discussed

as it arises.

The specification may have to change without its announcement for improving and remodeling the equipment.

EOP-D65-002-041-05E


Figure - 14 OUTLINE DRAWING of EL-700A-04 (1/4 inch) (The drawing is shown on the specification of fitting made by Nippon Pillar Packing)

110 5

84

95

70 50

80(55)

55.7

5

3

R2.5

DetailofMountinghole

(36)22.6

(10)

(86)

108

(56)

EOP-D65-002-041-05E



8480

(55)

55.7

R2.5

3

5


(56）

(10)

24.6

(86)

(36)

110 595108

5070

EOP-D65-002-041-05E



5070

(86)

3

5

R2.5


(36)24.6

(10)

55.7

80

(55)

110 5

84(56)

95108

EOP-D65-002-041-05E


Figure - 17 OUTLINE DRAWING of EL-700A-12 (3/4 inch)

84

121 5

70 50

O.D.19I.D.15.8

3

5

R2.5


(56)

(55)

80

(10)

54

(100)

35.1(36)

10895

EOP-D65-002-041-05E


Figure - 18 OUTLINE DRAWING of EL-700A-16 (1 inch)

84(56)

235

50

80

(55)

O.D.25.4I.D.22.2

R2.5


121 5

(10)

54

(100)

33.3(36)

70

95108

5

3

EOP-D65-002-041-05E


MEMO

荏原実業株式会社

計測器・医療本部

計測器営業部 ■東日本営業課：〒215-0033

神奈川県川崎市麻生区栗木2丁目3番12号 TEL 044-981-0560 FAX 044-981-0561 E-mail ej-ozone＠ejk.co.jp

■西日本営業課：〒541-0046 大阪市中央区平野町3丁目2番13号平野町中央ビル5階 TEL 06-6231-3528 FAX 06-6231-2929 E-mail ozon-osaka＠ejk.co.jp 技術部：〒215-0033

神奈川県川崎市麻生区栗木2丁目3番12号 TEL 044-981-0560 FAX 044-981-0561 E-mail ejozndsn1＠ejk.co.jp

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