Automated pH Measurement MedImmune, Frederick MD Roger Govaert March 2011.

Automated pH Measurement

MedImmune, Frederick MDRoger Govaert

March 2011

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance

© by METTLER TOLEDO

EasyClean 400(X): Overview

Functionality

Fully automated electrode maintenance system.

Automatically rinses cleans and calibrates an electrode mounted in an InTrac 7XXe housing.

Type EC 400X for hazardous areas. System integration via Profibus PA or Foundation Fieldbus possible.

TransmitterM 700 with EC 700 Module

InTrac7XXe housing All pH sensors

System requirements:

Sensors suitable for InTrac7XXe

Internal usage only

System Components


EasyClean Automation

Cleaning & Calibration at the Heart of the System

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance


EasyClean 400 Base

Filter, water trap

Water pressuregauge

Purge air

Water valve

Air valve

Piezo valve

Air pressure-regulator

Air pressure-gauge

PLC

Terminals


Media Adapter

Buffer and cleaning agent container (3.5 l / 0.92 gal)

Self-sustaining assembly with integrated pump

Media adaptor for connecting the container island with the EasyClean 400

The media adaptor offers up to three ports

Classic media island for two buffer and one cleaning agent container


NO moving mechanical parts

NO wear out

All wetted parts are chemical resistant

NO stored energy according to

ATEX 94/9/EG

Floating body for level indication

Suction pipe

Expansion pump

Connection to the media adapter

Media Pump


Media Pump

How the Expansion Pump works

Air/Liquid is drawn out of a main cylinder. This causes a

flexible membrane tube in

the center to expand. During this expansion,

the media is drawn from the bottom of the

membrane tube. Check valves

maintain proper direction of flow.

Air/Liquid is forced into main

cylinder. This causes a flexible membrane tube in the center to

constrict. During this constriction,

the media is pushed out of the

top of the membrane tube.

Check valves maintain proper direction of flow.


Sample Cleaning Agents

Cleaning Agent Chemical Concentration Sample Application

Diluted acids: e.g. against limy depositis

Hydrochloric acid HCl Max. 5 %

Sulfamic acid H3NO3S Food industry

Acetic acid CH3COOH

Nitric acid HNO3 Max. 5 %

Diluted alkaline solutions: Proteins, starch, fats, ZIP

Sodium hydroxide NaOH Max. 5 %

Organic solvents: e.g. against limy depositis

Ethyl alcohol C2H5OH Food industry

Isopropyl alcohol C3H8OH

Other cleaning agents:

Pepsine solution Starch


Media Connection

Buffer Island End

• Unique shape for error free connection

Buffer Island End


Tubing Connection End

• Unique size and colors for easy connection

Tubing Connection End

• Unique size and colors for easy connection

InTrac Interface End


InTrac Interface End



Housing Adapter

Tip: Orient this module opposite the pneumatic connections as shown in insert

Housing adapter distributes buffer, cleaning agent, control air and air for indicators


Housing Adapter

Standard connections should look like this.

1. Media connection to rinsing chamber

2. Rinsing chamber outlet

3. Feedback of “SERVICE” position

4. Feedback of “MEASURE” position

5. Control air for “SERVICE” position and supply for “SERVICE” position feedback unit

6. Control air for “MEASURE” position and supply for “MEASURE” position feedback unit

7. Holding bracket for strain relief of media connection

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance

M 700

M 700 – pH 2700(i), O2 4700(i), Cond 7700, CondInd 7700

Open flexible system

Reduce cost per loop through multi channel system

Optional Software allows application specific solutions

Common features VariPoWer (VPW) supply: 20 to 250 V Plain-text user interface with intuitive menu guidance Four configurable relay contacts (extendable to 8) Logbook function Sensor network diagram 2 channel recorder

M 700 – Modular Concept

Components of the EC 400(x)

The M 700 EasyClean 400 Module

Integrates in to the M 700. Communication with the EasyClean 400 via RS 485 interface

Has an integrated pH measurement Module

Provides the power supply for EasyClean 400

Module design allows for easy interfacewith M 700, ISM, PA and FF technologies

Clear – Measure (Terminal 2)Red – Ref. Elec. (Terminal 8)Green – RTD (Terminal 14)White – RTD (Terminal 13) Green &Yellow – Shield (Terminal 15)Blue – Sol. Ground (Terminal 12)

PT100 - Remove Jumper Term. (18 & 19) connect Gray wire.

EC400 Module Wiring

Wire the EC400(x) Module with a VP cable according the diagram.

Not Used with ISM Systems

Intelligent Sensor Management pH Module

Clear Coax

Colored GroundTo ISM pH Sensor

ISM pH Module is connected to EasyClean 400 Module for automated pH functionality of ISM Sensors/Systems

Wire the BASE Module of the M 700 as follows:- Power Lead 1* – Terminal 18

- Power Lead 2* – Terminal 19

- Earth Ground – Terminal 17

- Output 1 (+) – Terminal 7

- Output 1 (-) – Terminal 8

- Output 2 (+) – Terminal 9 “if required”

- Output 2 (-) – Terminal 10 “if required”

* There is no polarity for power on the M 700

1 1 2 2

M700 Base Connections

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance

Internal usage only

Main Menu Structure

ALL DEMO UNIT PASS CODES ARE SET TO 0000

Internal usage only

FRONT Module – Display Configuration

1. Press Menu key to select menu. Select parameter setting using arrow keys, confirm with Enter. Select: “Administrator level”: Passcode 1989

2. Select “M 700 FRONT”

3. Select “Measurement display”

4. Set the number of primary values (large display) to be displayed

5. Select process variable(s) to be displayed and confirm with Enter. Pressing the Meas key returns to measurement.

Notice the Module Icons for each variable!

Make sure you are displaying the variable that you really want.

Internal usage only

BASE Module – Output Settings

1. Call up parameter setting. Enter passcode.

2. Select M 700 BASE

3. Select “Output Current I1”

4. Select your measured variable

5. Select Curve, e.g. “Linear”: The measured variable is represented by a linear output current curve. The desired range of the measured variable is specified by the values for “Start” and “End”.

6. Enter your “Start” 4(0)mA value

7. Enter your “End” 20mA value

8. Press Meas to return to main display.

If you’re using a second output, follow the same steps but when

choosing the Output Current choose I2 instead of I1.

Internal usage only

Calibration Buffer Presets

Calimatic buffer

For automatic calibration, you must define the buffer set you want to use.

Select a buffer solutions from this buffer set in any order.

The selected buffer set with the nominal values of the individual buffer solutions is displayed in gray. The “Calimatic buffer” menu shows all buffer sets available.

Check module manual for buffer set details

Internal usage only

EC Parameter Settings

Select Module to control

Ensure you have selected correct module (2700i pH)

Fixed of Weekly Programming

Fixed time interval or daily/weekly custom programming

Program Selection

Select and Edit (as desired) programs you wish to run


Available Automated Programs

Cleaning- Retract, Clean and Measure

2-Point Calibration- Retract, Clean, Cal Point 1, Cal Point 2 and

Measure

1-Point Calibration- Retract, Clean, Cal Point 1 and Measure

Service - Retract, Clean, Extended Hold and Measure

Parking- Retract, Clean, External Hold, and Measure

User Defined Program 1

User Defined Program 2


2-Point Calibration Example

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance


System Integration

Integration via Fieldbus Network

Internal communication

4.. 20 mADI

Conventional integration: Digital Inputs/Outputs, Current Output

Internal communication

DO


DCS Control Options

Internal usage only

Agenda

System Overview

Main Components

M700 Transmitter

Programming Basics

Communications

Maintenance


Maintenance

Replacing seals in contact with the process medium- All seals that come in contact with the process medium should be replaced at least

every six months for reason of safety.

- With aggressive media the seals may need to be changed at correspondingly shorter intervals.

- Medium–wetted seals must be examined at least monthly, as well as during normal maintenance procedures to check for dirt or damage.

- Frequent insertion and retraction motion of the immersion tube can also have an influence on the necessary maintenance intervals


Maintenance


MC 700 Maintenance

Start probe maintenance- Here you can select a preset

program (Cleaning, Cal 2point, Cal1point, etc.) or one of the 2 user-specific programs. Select using arrow keys confirm with enter.

Probe maintenance- With the EC 400 “SERVICE”

program, the probe is moved into SERVICE position. The individual program steps are indicated in the display. After having terminated the servicing work, press the “End Service” softkey to move the probe back to “Measuring” position (PROCESS).


Maintenance

Reset wear counter - The wear counter indicates the

number of probe movements.

Manual control- Select function using arrow keys.

Symbol flashes, activate with enter. “ON” appears below the icon. Terminate function with enter. (“ON” disappears again.)

* The access code is specified in the “Parameter setting / EC 400 / Installation” menu.


Maintenance

It is recommended that a service visit be scheduled once a year. This check-up will ensure that the Easy Clean 400 is maintained properly. Site visits will include inspection and maintenance of O rings, seals, pumps, filters, hosing and armature. These visits will also provide an opportunity for additional training as required.


Questions?

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Automated pH Measurement MedImmune, Frederick MD Roger Govaert March 2011.

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