servicexx l tailored services easy clean 400 training

ServiceXXLTailored Services

Easy Clean 400 Training


2

Welcome

Your Trainer is Raymond Augustine- Service Technician & Training Specialist

- Background In Electronics

- Housings, Sensors, Transmitters & Cleaning Systems Specialist

Contact Information- Mettler-Toledo Ingold, Technical Services 1-888-687-7687

- Web site for technical information & manuals mtpro.com


3

Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


4

Objectives

To learn the function and importance of the Easy Clean 400

To learn why is it important to regularly clean and calibrate pH electrodes

To learn about the methods of control that can be interfaced with the Easy Clean 400

To learn about the valves and safety features of the Easy Clean 400 system


5

The EasyClean 400

Introducing the EasyClean 400- Total flexibility to fit your application

Offers multiple control possibilities and can be programmed extensively

Version for applications in explosion hazardous areas is available

Connection to a supervisory process control system can easily be realized in a conventional way or via Profibus PA


6

Benefits of EasyClean

Automatically cleaning and calibrating the electrode reduces maintenance effort

Proper and periodic cleaning substantially increases electrode lifetime

Cleaning and calibration of electrodes means continuous accurate measurement

Regular cleaning ensures less downtime

Maintenance Contamination Accuracy Downtime

Reduced costs for maintenance

Reduced replacement costs

Higher yield due to better accuracy

Better production efficiency


7

EasyClean 400 System Layout

The complete EasyClean 400 system

consists of:

Transmitter M 700

Module EC 700 (pH measuring and EC 400 control)

InTrac housing (with pneumatic check- back position indicators)

pH electrode and cable


8

Components of the EC 400(x)

Just like the M 700, the EC 400(x) is available in either Stainless Steel or

MT blue powder coat


9


Filter, water trap

Water pressuregauge

Add valve

Purge air

Water valve

Air valve

Piezo valve

Air pressure-regulator

Air pressure-gauge

PLC

TerminalsFree place for add valveo

pti

on

al

Double valve technology


10

Leak sensor

Water pressure manometer asabsorber and switch with warning

Double secured pressure monitor

(Piezo valve in sequence & as switch)

Monitor of pH and temperature recognize false media / buffer (Done by the M700 EC400 module)

Fully encapsulated electronics


All tubing is color coded and sized for Easy setup


11

RS 485

PS 6.8V

Emergency stop (optional)

M 700

Media Island

EC400

EC700

InTrac7XX



12


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

Connection for external cleaning agent, for example

The media adaptor offers up to three ports

Classic media island for two buffer and one cleaning agent container


13

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

All materials are made of PEEK or PVDF !



14


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.


15

RS 485

PS 6.8V


M 700

Media Island

EC400

EC700

InTrac7XX



16


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 and PROFIBUS© technology


17

pH probe interfaces with the EC 400(x) module like a standard 2700 pH Module

EC 400(x) communication is established through these two lines

Power for the EC 400(x) is supplied through these lines



18

Interface and control of the EC 400(x) is done through the M 700 and the pH EC400 Module



19


RS 485

PS 6.8V


M 700

Media Island

EC400

EC700

InTrac7XX


20

Any InTrac housing can be used as long as it is pneumatically controlled and has pneumatic indicators


Pneumatic Insert/retract ports

Pneumatic Position Indicators


21


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

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


22


The EC 400(x) comes with a housing conversion kit

This kit is used to convert the proper housing so it can be used with the EC 400(x) system


23


RS 485

PS 6.8V


M 700

Media Island

EC400

EC700

InTrac7XX


24


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



25

System Integration Architecture

The EC 400(x) is designed to

integrate into existing systems

in one of two ways

PLC/DCS Control

Digi Com (Profibus)


26

Digital Communications


PFB PA

Complete system control via M 700 or PROFIBUS communications

RS 485

Profibus PA


27

PLC/DCS Control


Complete remote system control via digital inputs and outputs

RS 485

4.. 20 mAPFB PA

Digital Inputs

Digital Outputs


28

Safety & Diagnostics Features

Media monitoring- Actual media in the flushing chamber can be checked related to process value

or temperature

Level monitoring- Buffers and cleaning agent will be monitored with the level indicator which is a

part of the pump

Sensor detection- The insertion of the sensor in the housing can be detected (cable removed

from the sensor). Function is only available with electrodes with temperature probe

Air and water pressure monitoring- Supplying air and water is monitored via pressure switches

Flooding monitoring- A leak sensor, mounted on the bottom of the EasyClean 400, detects a

floating of the box.


29

Questions

What is the function of the Easy Clean 400?

Why is it important to regularly clean and calibrate pH electrodes?

What will happen if one of the valves within the Easy Clean (gating fluid) fails?

Can the buffer island run properly with only two bottles attached?

How does the Easy Clean communicate with the M700 transmitter?

What methods of control can be interfaced with the Easy Clean 400?

Can the umbilical cord for this unit be incorrectly installed?

Are their any moving mechanical serviceable parts on the buffer island?


30

Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


31

Objectives

To understand the requirements for air pressure/ water pressure and filtration for the system

To understand the 4-20milliamp outputs and the difference between the various grounding points

To understand how the Easy Clean 400 always knows the position of the housing and probe

To learn about the various diagrams and wiring color codes


32

Assembling the EC 400(x)

Getting StartedTools you will need:

Screw Drivers:• 1 small flat head• 1 regular Philips

Adjustable Wrench(Medium)

Utility Knife

EasyClean 400(x) BoxesQty=2

Quick Start Guide


33


Remove all the parts from the boxes and layout on the floor how you would like to mount the unit.

Check with the minimum requirements to make sure your layout meets those requirements.

Make sure all cables and connections will be easily accessible after mounting.


34

Water- To hook up a water supply both a ¼” threaded female

connection and a ¾” male connection is provided. Choose the fitting that fits your needs and install.

- The EasyClean 400(X) is operated with a water pressure of 2 ... 6 bars.

- The water supply lines shall not contain a check valve.

- Water: filtered 100 μm, temperature 5 ... 65°C.

Air- To hook up an air supply a ¼” female connection is

provided. Choose a fitting that fits your needs and install.

- The EasyClean 400(X) is operated with an air pressure of 4 ... 10 bars.

- Adjust the pressure regulator so that the internal operating pressure is kept within 4 and 7 bars. The air must be condensate- and oil-free. Maximum air consumption during probe activation is 300 L/min.

- Air quality to ISO 8573-1 Quality class 5.3.3



35


Start by installing the tubing side of the umbilical

cable in the EC 400(x)

1. Unscrew the retaining nut from the cable and place the end into the EC 400(x)

2. Unscrew the retaining nut from the cable and place the end into the EC 400(x)


36


Insert all the push connect tubing into the appropriate size fitting.

Note: Along with the tubing being sized for the correct fitting they are also color coded (i.e. red with red, green with green).


37


Place the blue tube into the threaded “L” fitting and tighten using an adjustable wrench.

Do not over tighten!


38


When installing the Probe Position Cable, make note of color and terminal from the callout label mounted on top of the terminal block. Then locate the number on the terminal below the callout label and install. Tighten terminals with a small flathead screwdriver.


39


Unscrew the cable gland and remove the yellow plug. Place the cap on the cable and feed the cable into the EC 400(x) case. Using an adjustable wrench, tighten down the gland nut until it is tight around the cable casing.

Anytime a cable must be inserted through a gland this procedure must be used.

Using the color coding and terminal assignment on the callout label, install each wire as indicated.


40


Install the Buffer Island electrical connection. This connecter is keyed so lightly push the connector on to island connector and twist slowly until the connector falls into its seat.

Twist and hand tighten the locking ring.


41


The connector for the Buffer Island on the umbilical cord is keyed for easy assembly.

Simply line-up the flat on the connector with the flat on the island connection.

Push to seat the connector and tighten the screws with a Philips screwdriver.


42


The bottle connection on the Buffer Island comes with blind plates. Remove the plate and place the bottles on to the connectors. Tighten screws with a Philips screw driver.

NOTE: If a bottle is not connected you must have the blind plate installed!


43


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


44


Attach the Housing Adapter connection to the housing.

Use a Philips screwdriver to tighten it down.


45

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

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


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


46

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



47

Questions

Why is it very difficult to incorrectly tube the Easy Clean 400?

What are the requirements for air pressure/water pressure for the system?

What grade of filter is required for the water supply to the Easy Clean 400?

What distance/height limits must be respected when mounting the Easy Clean 400 system?

Why is it important not to connect a digital ground to Earth ground?

How many 4-20milliamp outputs does the M700 transmitter have?

How does the Easy Clean 400 know if the housing/ probe is in the correct

position?

What is the most important rule when making screw and bolt connections?


48

Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


49

Objectives

To gain a working knowledge of the “Sensoface” feature

To be able to set Calibration and cleaning cycles for weekly or daily intervals

To understand the importance of configuring the voltage limits for the system when using a DCS to remotely control the Easy clean 400

To gain an understanding of the “sealing water” feature, and why is it important

To understand the “start up “ function feature and why it is important


50

EC400 /M 700

Now that we have our EasyClean 400(x) assembled we need to set up our M 700 for use with the EC 700(x) module and the pH probe we have selected.

This is done by configuring the system and each “Module” of the M 700.

1. SYSTEM Control

2. FRONT Module

3. BASE Module

4. EC 700 Module

a. pH 2700 module

b. EasyClean 400


51

SYSTEM Module

1. Call up parameter setting. Select Administrator level. Enter passcode (1989).

2. Select System control using arrow keys, confirm with Enter.

3. Select Time/date using arrow keys, confirm with Enter.

4. Select date format, and adjust time and date.


52

FRONT Module

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.


53

BASE Module

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.


54

pH 2700 / EC400 Module

Setup the EC 400 Module

To begin, press the Meas button on the front of the M 700.

Choose par from the menu and then Module pH 2700 / EC 400.

This is where we will set-up the type of sensor used and its limits.


55


Sensor Data

Sensor Type:- The default for this is standard. All

MT sensors use the Standard setting.

Temperature Detection:- Default setting is a PT1000. Choose

the RTD that fits your sensor.

Sensoface:- Default setting is on. Sensoface is the

M 700 live diagnostics feature.

Slope, Zero Point, and Sensocheck Ref El are setting for use with diagnostics.


56

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

-For calibration, you must then use 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.



57

Sensoface provides information on the sensor condition (evaluating the sensor data). Great deviations are signaled.

The following parameters are monitored:- Slope

- Zero

- Reference impedance (for ISFET sensors)

- Glass impedance (pH electrodes)

- Response time

- Calcheck

The use of smiley faces give the user the ability to gauge the state of the sensor at a glance.

Sensoface


58

Parameter Setting – Sensoface


59

Now we need to set up the EC400 program.

Press the Return softkey twice this will bring you out to the Parameter setting menu. Scroll down the EC 400 folder. This is just below the Module M 700 EC 400.

This will bring up the Module EC 400 Menu


Setting up the EC400 Module


60

EC 400 Control - This is a software switch

for the EC 400. It consists of 2 states.

Off: The M 700 will default to a standard pH 2700 Module.

On: The EC 400 will take over all calibration functions.



61

Cal Preset Values Menu- In this menu we can set up which module to

monitor, whether or not we want to use predefined values or Calimatic for our buffers, and what calibration mode we will be using.

- Measuring Module If you have more than one pH module,

select which module will be monitored by the EC 400.

- Cal Buffer 1 and 2 Specify Calimatic for auto buffer

recognition or choose the value of the buffer you want for buffer bottle one or two (respectively).

- Cal Mode Adjustment: Values determined by a

calibration are used immediately. Check: Values that are determined by

calibration are logged but do not take over.



62

Time Control

Fixed Interval:- Fixed interval timing control allows

you to set up three independent time programs. Any of the 7 programs can be chosen.

From the EC 400 menu, choose the time control fixed interval and then choose the fixed interval folder to setup each of the three programs

Specify times (000.0 h ... xxx.x h)(Please note: 000.1 h = 6 min)



63

Week Program

Allows selection of up to ten programs per day and you can choose between “Individual start” or “Interval” (the program is executed within a start and an end time at a specified interval).

From the Timing interval option choose Week Program. In the week folder you find each day of the week. After a day is chosen you are taken to the view screen. From this screen you can see each program and the interval they will run. You can also edit, copy, or create program from this screen



64

Installation Menu

Measuring procedure - two different measuring procedures available

Continuous measurement- Electrode is normally in measurement position

- Electrode will be only retracted for cleaning, calibrating or servicing

- Used for continuous processes

Short time measurement- Electrode is normally in service position

- Electrode will be only inserted to the process for a specified measurement time

- Can be used for continuous process with abrasive media or batch processes

NOTE:

Program flows for continuous and short time measurement are different and will be loaded, depending on the chosen measuring procedure.



65

External DCS Menu- If Control via a DCS or PLC is planned, use

this menu to setup how the DCS inputs and outputs will functions.

- Control On: Enables control through the DCS

inputs Off: Disables control through the DCS

inputs

- Inputs DCS, M/S, and A/M Active 10…30V: Contact will activate

between 10 and 30 Volts. Active < 2V: Contact will activate if a

voltage drops below 2 volts.

- Output DCS (34) Measure: Contact will activate when the

housing is in the Measurement position. Alarm: Contact will activate when the EC

is in an alarm state.

- Outputs DCS (31…34) Specify desired contact type. Either N/O

or N/C



66

Sensor Detection

Sensor detection “On” prevents accidental probe movement when the electrode has been removed. This is done by checking whether the temperature probe integrated in the sensor is connected.

Note: The default for this is “Off”



67

Probe Menu- From this menu you can select the style of

housing, set the amount of time to set for movement, whether or not to use the sealing water function and set the wear counter.

- Probe Type Select the retractable housing to be used.

Here, the max. move time is automatically adjusted (depending on model).

- Max. Move Time A default value will be set for predefined

housings. If required you can alter this value to fit your application.

- Sealing Water When set to on, sealing water is switched

on shortly before the probe movement is started to keep the rinsing chamber free from medium.

- Max Wear Counter Permits the specification of the max

number of movement cycles to help aid in maintenance of the housing.



68

Rinse Water Menu- In this menu we can specify whether

or not to monitor the rinse water. You can choose to monitor either process value or temperature.

-Monitoring Off: No monitoring Process Value: Monitor the pH

value of the rinse water Temperature: Monitor a defined

temperature of the rinse water

-Setpoint Set this to the value that will be

monitored

-Adm. Deviation This is the acceptable deviation

to the setpoint. This is a plus or minus value.



69

Media Adapter Menu- In this menu we can specify the way we

want the media port to be used and if we want monitoring of the port.

Port I, II, and III

- Metering Pump: Sets the port to be used as a buffer pump

- Cleaning Agent: Sets the pump to be used for metering a cleaning agent

- Off: Turns off the pump Medium

- Used for entering a name for the port. This value will be displayed during all functions of the port.

Displaced Volume

- Choice of 50, 75, or 100mL. This is housing dependent and is defaulted to the 77Xe series.



70

Residual Volume- This feature allows for a custom

alarm setting indicating the level of unused buffers and/or cleaning solution

Monitoring- Off: No monitoring

- Process Value: Monitor the pH value of the bottle media

- Temperature: Monitor a defined temperature of the rinse water

Setpoint- Set this to the value that will be

monitored

Adm. Deviation- This is the acceptable deviation

to the setpoint. This is a plus or minus value.



71

Start-Up-When you are sure to have set all

parameters, select “Yes” to confirm. The pumps will perform the number of stroke movements required for filling the media tubes completely. The necessary rinsing cycles are automatically started and the EC400 will return to the state it was at prior to the Start-Up.



72

Questions

Why is it important to configure the time and date on the M700 transmitter?

What does the “Sensoface” icon tell you at a glance?

What will the M700 system default to if “system control” is switched off?

Can you set the Easy Clean system to perform a Calibration and cleaning at

weekly or daily intervals?

Why is it important to configure the voltage limits for the system when using a DCS to remotely control the Easy clean 400?

What is the function of the “sealing water” feature, and why is it important?

What is the function of the “start up “feature and why is it important?

How does the M700 transmitter know when the incorrect buffers are being used for calibration?

What is the default code for the administrator?


73

Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


74

Objectives

To learn about the binary bit sequence used to initiate the various easy clean programs

To learn about the important “park” feature

To gain an understanding of the different program sequences

To gain an understanding of how to edit the systems programs


75

Programming

Control Programs of EasyClean 700(X)

Six programs and one service program can be called up. Five program flows are preset. Two further programs can be entered by the user (User 1, User 2).The programs are called up- for manual operation via the M 700(X)

- Remote via DCS or switch with passive input Bin 1…3 (24 V must be supplied externally, see specs)


76

Programming


77

The Park Program- The park program includes the programming step “Wait position”. When the

program is started via the DCS inputs BIN 1 ... BIN 3 on the EC 400, the program will be executed until the “Wait position” is reached. There it stops until the signal status at the DCS inputs changes.

- The program is started by a short signal at the DCS inputs: Wait position is skipped.

Programming


78

Program sequences – 5 programs predefined, 2 User specific 2-point calibration

- Executes a two-point calibration

1-point calibration- Executes a one-point calibration

Cleaning- Rinse with water and clean with cleaning agent

Parking- Cleaned electrode will be stored in the flushing chamber (can only be activated via

DCS)

Service- Housing will be retracted to service position

User defined 1- Can be defined to the customer’s need

User defined 2- Can be defined to the customer’s need

Programming


79

Cleaning

Two- point calibration

One- point calibration

User program (1)

User program (2)

Park

Service program

The EasyClean 400(x) uses seven programs. Of these programs, four are pre-installed.

Three of the programs are defaulted to a two-point calibration. These are meant to be defined by the user.

Note: Even though five programs are pre-installed, they are also capable of being modified to meet the customers needs.

01: probe in SERVICE

02: Cleaning agent 0003 s

03: Rinse on 0010 s

04: Rinse off 0002 s

05: Buffer 1 0000 s

06: Cal Buffer 1

07: Rinse on 0010 s


09: Buffer 2 0000 s

10: Cal Buffer 2

11: Rinse on 0010 s


13: Probe in MEASURE

14: Latency 0010 s

15: Program End

Programming


80

Program EC 400…

Rin

se O

ff

Rin

se o

n

Rin

se o

n

RetractC

lean

Pum

p 1

Wai

t tim

e

Pum

p 2

Cal

Buf

f. 2

Insert Measure

Cal 2 point Default

All program sequences are alterable.

This allows for total customization of the 5 installed default programs and the 2 user programs to meet your, the customer, needs.

Rin

se o

n

Cal

Buf

f. 1

Rin

se O

ff

Rin

se O

ff

Programming


81

Adjusting the programs to the customers need

32 program steps possible

Max. time per step: 9999s

Change order of the program flow by inserting new steps Valve function

Pump function

Programming


82

Editing a Program- Every program can be edited. To

begin, choose the program you would like to edit and press the enter key to bring up the options menu. Scroll to desired option and press enter.

Enter program name- A new program name can be entered

using the arrow keys.

Programming


83

Edit program step- Select the program step you want to edit

using the arrow keys. Press enter: Now you can choose between “Edit, Insert, Delete”.

Edit: Allows selecting a function Insert: Inserts an empty step above

the selected program steps and then allows selecting a function – by “editing” empty step –

Delete: The program step is deleted.

Programming


84

Activate monitoring-With several functions, you can monitor

the media used (e.g. cleaning agent, buffers, rinsing water) in the calibration chamber. (“Monitoring: On” must have been enabled in the Installation menu.) A minimum response time > 2 s is required. The respective program step is then marked with “Chk”.

-Note: In any case, it is necessary that you select the monitoring function for the respective medium in the “Installation” menu and specify valid tolerance limits for temperature or process value; otherwise the respective line is not displayed.

Programming


85

Questions

How many different programs can be initiated via the Binary bit inputs?

What will happen if a program is initiated via the Binary inputs with a

continuous signal?

Which of the programs can be altered by the customer?

When adding a step to an existing program such as “purge air on” what is the next mandatory step that must be added to avoid an error?

What does the term “exposure time” refer to?

The active monitoring function can be activated when editing a program line, but where must it have been enabled first?

How many steps are allowed for any given program?

What does the Latency feature refer to and why is it important?


86

Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


87

Objectives

To understand the inner workings of the combination pH electrode

To understand the importance of regular calibration

To understand the effect of temperature on pH measurement

To learn about the various types of calibration offered by the Easy Clean 400 system

To understand the various types of calibration available to the user


88

Calibration

pH is a measure of the hydrogen ion activity of a solution resulting in a mV signal

Acids = Positive mV Signal

Base = Negative mV Signal

7.0 pH = 0 mV Output

Sensor Output Changes with Temperature- 0o C ~ 54.2 mV/pH

- 25oC ~ 59.2 mV/pH

- 50oC ~ 64.1 mV/pH

Sensor Output is Corrected to 25oC with Automatic Temperature Compensation

-500

-400

-300

-200

-100

0

100

200

300

400

500

0 2 4 6 8 10 12 14

pHm

V

0C 25C 50C


89

Why do we measure and control pH?- to produce products with defined properties

- to produce products with less costs

- to avoid damage to people, materials and environment

- to fulfil regulatory requirements

- Proper control will optimize yield

Opt

imal

pH

con

trol

Yieldkg/batch

pH

Calibration


90

Why Calibration is Important

Every Electrode is different

Electrodes “live” and age in process or storage

Parameters change after cleaning

Aging accelerates if stored dry

-450

-350

-250

-150

-50

50

150

250

350

450

0 7 14

Ideal

85% slope

0.5pH offset


91

pH VALUE is measured by POTENTIOMETRY

The measuring chain consists of a:- pH (also called glass) electrode

- reference electrode

The difference between the potentials of the pH and reference electrodes is a function of the solution being measured.


92

pH is a Potentiometric Measurement

The Measuring System consists of a pH Measuring Electrode and Reference Electrode

The Potential Difference Between the Two Electrodes is a Function of the pH Value of the Measured Solution

The Solution Must Be Conductive and is Part of the Electrical Circuit

pH Measuring Electrode Reference Electrode


93

pH Sensor Components

pH Measuring Electrode- Purpose is to develop a millivolt

potential directly proportional to the free hydrogen ion concentration in an aqueous solution

Reference Cell- Purpose is to maintain a constant

reference potential regardless of ph change or other ionic activity in the solution

Reference Cell Liquid Junction- Purpose is to maintain electrical

contact between the reference electrode and the measuring electrode by way of the solution


94

How the pH Sensitive Glass Works

Positive charged free hydrogen ions (H+) develop positive mV Potential relative to inner buffer- Acidic solutions

Fewer hydrogen ions relative to inner buffer produce a negative mV potential- Alkaline solutions


95

Temperature Compensation

Corrects for slope change with temperature

Performed automatically by the transmitter

-500

-400

-300

-200

-100

0

100

200

300

400

500

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14

pH

E (

mV

)

25 C

77 C

)7(303.2

pHnF

RTEE O


96

M 700 Calibration

Parameters by Calibration- Zero Point

pH Value exhibits a millivolt output of zero millivolts. The zero millivolt reading will change with age and wear.

- Temperature: Temperature is a critical value for pH since the pH value is

dependent on temperature. Most probes today have an integrated temperature probe.

- Slope: The voltage change per pH unit. The theoretical pH slope is

-59.2mV/pH.


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Calibration

Calibration Methods- One-point calibration

The electrode is calibrated with one buffer solution only. Here, only the electrode zero point is detected and taken into account by the M 700 after an adjustment. One-point calibration is appropriate and permissible whenever the measured values lie near the electrode zero point so that slope changes do not have much of an impact.

- Two-point calibration The electrode is calibrated with two buffer solutions. In that case, zero point and

slope of the electrode can be detected and taken into account by the M 700 after an adjustment. Two-point calibration is required if:- the electrode has been replaced- the measured pH values cover a wide range,- there is great difference between the measured pH value and the electrode

zero,- the pH measurement must be very accurate,- the electrode is exposed to extreme wear.

- Three-point calibration (only for manual calibration) The electrode is calibrated with three buffer solutions. Zero and slope are

calculated using a line of best fit according to DIN 19268.


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Calibration

Sensor Replacement- When an electrode is replaced, a calibration must be done on the probe

initially.- All data of the electrode is input into the Statistics menu in the Diagnostics

section of the M 700.- Here is where zero, slope, glass and reference impedance, and response time

of last three calibrations will be stored in reference to the first calibration.- This will enable data trends for drift and aging of the electrode.


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pH Module EC700

Calibration


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Calibration

You have 6 options for calibration. This allows for maximum accuracy and calibrations that will be relative to the process- EC 400 - Calibration with the EC700 module

- Calimatic: Automatic Cal - Cal with auto buffer recognition

- Manual: Entry of Buffers - Cal with manual buffer values

- Product Calibration - Cal in-situ

- Data Entry - Cal using sensor data

- ORP Calibration - Cal for ORP Measurement


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Calibration

Select Calibration Method and Probe goes into service mode

Start the calibration of the probe

Use “End Service” to move probe Back into process at position it started


102

Calibration

Manual Calibration- For a manual calibration to be

performed, the electrode must be withdrawn from the process.

- Once the housing is moved into the service mode, the calibration menu is activated.


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Calibration

Manual calibration is performed with one or two buffer solutions.

The analyzer automatically detects the nominal buffer value on the basis of the electrode potential and the measured temperature.

Any sequence of buffer solutions is possible, but they must belong to the buffer set defined during parameter setting


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Calibration

If only doing one point calibration, then press “End” .

For two point calibration, rinse probe then press “Start”

Once a calibration has taken place you have the option to end and disregard the calibration data or to accept it and make an adjustment to the calibration data.

Press adjust for the calibration to be stored into memory


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Questions

How many options does the Easy Clean 400/ M700 have for calibration?

When would it be most important to do a two point calibration?

What is the electrode measuring when it takes a pH reading?

How does temperature effect pH?

What ideally forms on the pH glass of an electrode during measurement?

Is it possible to trend your calibration data with the M700 transmitter?

What is the term “in situ” imply?

What is the default code for calibration?


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Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


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Objectives

To learn about the serviceable parts of the Easy clean400 system and the interval at which they should be changed


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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


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Maintenance


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pH Module EC700

Maintenance


111

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).


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Maintenance

Reset wear counter - The wear counter indicates the

number of probe movements.

Manual control (requires access code*)- 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.


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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.


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Questions

Why is it important to replace the orings in a retractable housing?

What is the “wear counter” and why is it important?

How often should you inspect the orings in a retractable housing for abnormalities?

What is the default code for the maintenance/ manual control menus?

How often should a Mettler Toledo service Technician be scheduled for preventative maintenance?

What position should the probe housing be in before starting any maintenance and why is that important?


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Agenda

System Overview

Installation

Configuration

Programming

Calibration

Maintenance

Troubleshooting


116

Objectives

To get an overview of the powerful troubleshooting tools in line with the Easy Clean 400


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Diagnostics

Troubleshooting


118

Sensor Monitor- The Sensor Monitor function

shows the millivolt value directly measured by the sensor. Also displayed is the glass and reference impedance along with the RTD resistance and temperature value.

- All are very important functions for diagnostics and validation!

Troubleshooting


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EC 400 status-The media / ports at the media adapter. The texts for the media are entered by the user during the installation (here, for example “Buffer 7.00”)

Troubleshooting


120

Sensor Network Diagram- The Sensor Network Diagram is a

great tool for visualizing, in one graphic, the over all state of the loop. Because the measured values are continuously monitored during the measurement process, you can quickly determine where a possible problem might be and affect quicker troubleshooting techniques.

- If a tolerance limit has been exceeded, the respective parameter is flashing.

- Values in gray: Monitoring is switched off.

Troubleshooting


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Troubleshooting Matrices

Extensive troubleshoot guide for the EC 400 and the M 700 are included in their respective manuals.

EasyClean 400 Troubleshooting Matrix M 700 Troubleshooting Matrix


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Questions

Why is the sensor monitoring screen excellent for validation of the electrode?

Where do you initiate the self check function for the Easy Clean 400?

What does it mean (in the network diagram window) when the lines are touching the innermost circle?

What is your instructor’s name?


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servicexx l tailored services easy clean 400 training

Documents

module ec

flexible membrane tube

easy setup

periodic cleaning

electrode lifetimecleaning

switchmonitor of ph

ph electrodesto

check valves