Endress+Hauser Liquiline CM442 User manual

BA450C/07/EN/13.10
71124075
Valid as of:
Software version 01.02.00
Operating Instructions
Liquiline CM442
Universal four-wire multichannel controller
Operation & settings

Operation concept
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Fig. 1: Pressing the soft key: selecting the menu directly
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Fig. 2: Turning the navigator: moving the cursor in the menu
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Fig. 3: Pressing the navigator: launching a function
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Fig. 4: Turning the navigator: selecting a value (e.g. from a list)
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Fig. 5: Pressing the navigator: accepting the new value
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Fig. 6: Result: new setting is accepted

Endress+Hauser
Table of contents
1 About this manual . . . . . . . . . . 4
2 General settings . . . . . . . . . . . . 5
2.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Date and time . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Automatic hold . . . . . . . . . . . . . . . . . . . . . 6
2.4 Logbooks . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Extended setup . . . . . . . . . . . . . . . . . . . . . 9
3 Information on sensors with the
Memosens protocol . . . . . . . . 13
4 Inputs: General . . . . . . . . . . . 14
5 Inputs: pH/ORP . . . . . . . . . . . 15
5.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Extended setup . . . . . . . . . . . . . . . . . . . . 16
6 Inputs: Conductivity . . . . . . . . 29
6.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 29
6.2 Extended setup . . . . . . . . . . . . . . . . . . . . 35
7 Inputs: Oxygen . . . . . . . . . . . . 42
7.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 42
7.2 Extended setup . . . . . . . . . . . . . . . . . . . . 43
8 Inputs: Chlorine . . . . . . . . . . . 56
8.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 56
8.2 Extended setup . . . . . . . . . . . . . . . . . . . . 57
9 Inputs: Turbidity and solids . . 69
9.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 69
9.2 Extended setup . . . . . . . . . . . . . . . . . . . . 70
10 Inputs: SAC . . . . . . . . . . . . . . 79
10.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 79
10.2 Extended setup . . . . . . . . . . . . . . . . . . . . 80
11 Inputs: Nitrate . . . . . . . . . . . . 89
11.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 89
11.2 Extended setup . . . . . . . . . . . . . . . . . . . . 90
12 Inputs: ISE. . . . . . . . . . . . . . . . 98
12.1 Basic settings . . . . . . . . . . . . . . . . . . . . . . 98
12.2 Extended setup . . . . . . . . . . . . . . . . . . . . . 99
12.3 Electrode slot menus . . . . . . . . . . . . . . . . 101
12.4 Limits operating hours . . . . . . . . . . . . . . 108
13 Inputs: Interface . . . . . . . . . . 110
13.1 Basic settings . . . . . . . . . . . . . . . . . . . . . 110
13.2 Manual hold . . . . . . . . . . . . . . . . . . . . . . 110
13.3 Tank configuration . . . . . . . . . . . . . . . . . 110
13.4 Sensor signal . . . . . . . . . . . . . . . . . . . . . . 111
13.5 Extended setup . . . . . . . . . . . . . . . . . . . . 112
14 Outputs . . . . . . . . . . . . . . . . . 116
14.1 Current outputs . . . . . . . . . . . . . . . . . . . 116
14.2 Alarm relay and optional relays . . . . . . . . 119
14.3 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
15 Additional functions . . . . . . . 124
15.1 Limit switch . . . . . . . . . . . . . . . . . . . . . . 124
15.2 Controller . . . . . . . . . . . . . . . . . . . . . . . . 127
15.3 Cleaning programs . . . . . . . . . . . . . . . . . 134
15.4 Mathematical functions . . . . . . . . . . . . . . 135
16 Communication. . . . . . . . . . . 140
16.1 Service interface . . . . . . . . . . . . . . . . . . . 140
16.2 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Index. . . . . . . . . . . . . . . . . . . 142

About this manual
4Endress+Hauser
1 About this manual
This manual gives a detailed account of all the configuration options in the "Setup" menu.
A description of the following menus is provided here:
• Inputs
– Input configuration
– Split into separate sections based on the different types of sensor that can be connected
Some submenus are identical for all sensor types.
These submenus are repeated in each input-specific section to make sure you can find the
information you need quickly and easily.
•Outputs
– Output configuration
– Split into separate sections based on the different output types
• Additional functions
– Settings for alarm sensors and controllers
– Cleaning program configuration
• Data management
– Firmware updates
– Saving and loading configurations
This manual does not include the following:
• Setup/General settings
--> Operating Instructions BA444C "Commissioning"
• Display/Operation
--> Operating Instructions BA444C "Commissioning"
• Calibration
--> Operating Instructions BA451C "Calibration"
•Diagnostics
--> Operating Instructions BA445C "Maintenance & Diagnostics"
• Expert
--> Internal Service Manual

General settings
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2 General settings
2.1 Basic settings
2.2 Date and time
Path: Menu/Setup/General settings
Function Options Info
Device tag Customized text, 20
characters
Select any name for your controller. Use the TAG name for
example.
Temperature unit Options
•°C
•°F
•K
Factory setting
°C
Current output range Options
• 0..20 mA
• 4..20 mA
Factory setting
4..20 mA
Decide whether you want to map your measuring range from
0 to 20 mA or from 4 to 20 mA.
Error current 0.0 to 23.0 mA
Factory setting
21.5 mA
The function meets NAMUR NE43.
Set the current value that should be output at the current
outputs in the event of an error.
The value for "Error current" should be outside the measuring range. If you decided that your Current output
range="0..20 mA", you should set an error current between 20.1 and 23 mA. If the Current output range="4..20 mA",
you could also define a value < 4 mA as the error current.
The device allows an error current within the measuring range. In such instances pay attention to possible affects this may
have on your process.
Alarm delay 0 to 9999 s
Factory setting
0 s
The system only displays the errors that are present longer
than the set delay time. This makes it possible to suppress
error messages that only occur briefly and are caused by
normal process-specific fluctuations.
Path: Menu/Setup/General settings/Date/Time
Function Options Info
Set date Depends on the format Editing mode:
Day (two-digit): 01 to 31
Month (two-digit): 01 to 12
Year (four-digit): 1970 to 2106
Set time Depends on the format Editing mode:
hh (hour): 00 to 23 / 0 am to 12 pm
mm (minutes): 00 to 59
ss (seconds): 00 to 59

General settings
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2.3 Automatic hold
Extended setup
Date format Options
• DD.MM.YYYY
• YYYY-MM-DD
•MM-DD-YYYY
Factory setting
DD.MM.YYYY
Decide which date format you want to use.
Time format Options
• HH:MM am (12h)
• HH:MM (24h)
• HH:MM:SS (24h)
Factory setting
HH:MM:SS (24h)
Decide whether you want to use the 12-hour or 24-hour
clock.Seconds can also be displayed with the latter version.
Time zone Options
•None
• Choice of 35 time zones
Factory setting
None
If no time zone is selected, then Greenwich Mean Time is
used (London).
DST Options
•Off
• Europe
•USA
• Manual
Factory setting
Off
The controller adapts the summertime/normal time
changeover automatically if you choose European or
American daylight saving time.
Manual means that you can specify the start and end of
daylight saving time yourself. Here, two additional submenus
are displayed in which you specify the changeover date and
time.
Path: Menu/Setup/General settings/Automatic hold
Function Options Info
Device specific hold
Setup menu Options
• Disabled
•Enabled
Factory setting
Disabled
Decide whether a hold should be output at the current
output when the particular menu is opened.
Diagnostics menu
Calibration menu Factory setting
Enabled
Hold delay 0 to 600 s
Factory setting
0 s
The hold is maintained for the duration of the delay time
when you switch to the measuring mode.
Path: Menu/Setup/General settings/Date/Time
Function Options Info

General settings
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2.4 Logbooks
Logbooks record the following events:
• Calibration/adjustment events
• Operator events
• Diagnostic events
Here you define how the logbooks should store the data.
In addition, you are also able to define individual data logbooks. Assign the logbook name and select the
measured value to be recorded. The data recording rate (Scan time) is then the same for all data
logbooks.
Path: Menu/Setup/General settings/Logbooks
Function Options Info
Logbook ident Customized text Part of the file name when exporting a logbook.
Event logbook Options
•Off
• Ring buffer
• Fill up buffer
Factory setting
Ring buffer
All diagnostic messages are recorded
Ring buffer
If the memory is full, the most recent entry automatically
overwrites the oldest entry.
Fill up buffer
If the memory is full, there is an overflow, i.e. no new values
can be saved. The controller displays a corresponding
diagnostic message. The memory then has to be cleared
manually.
Overflow warnings
Data logbook="Fill up buffer"
Calibration logbook Options
•Off
•On
Factory setting
Off
Decide whether you want to receive a diagnostic message
from the controller in the event of memory overrun of the
logbook in question.
Diagnostic logbook
Configuration logbook
Data logbooks
Scan time 00:00:01 ... 01:00:00
Factory setting
00:01:00
Minimum interval between two entries
Format: HH:MM:SS
New You can create a maximum of 8 data logbooks.
Logbook name Customized text, 20
characters
Source of data Options
•None
• Channel 1
• Channel 2
• Controller 1
• Controller 2
Factory setting
None
Select the input that should be the data source of the logbook
entries.

General settings
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Measured value Options
depend on Source of data
The measured value to be recorded depends on the selected
data source and thus also on the sensor connected.
Add another logbook Action Only if you want to create another data logbook
immediately.
You add a new data logbook at a later data using New.
Finished Action This allows you to exit the menu New.
"Logbook name" The menu only appears if you have created a new data
logbook.
Source of data Read only This is for information purposes only.. If you want to record
another value, delete this logbook and create a new data
logbook.
Measured value
Log time left
Data logbook="Fill up buffer"
Read only Displays the days, hours and minutes remaining until the
logbook is full.
Log size
Data logbook="Ring buffer"
Read only Displays the number of entries remaining until the logbook is
full.
Logbook name Customized text, 20
characters
You can change the name here again.
Data logbook Options
•Off
• Ring buffer
• Fill up buffer
Factory setting
Off
Ring buffer
If the memory is full, the most recent entry automatically
overwrites the oldest entry.
Fill up buffer
If the memory is full, there is an overflow, i.e. no new values
can be saved. The controller displays a corresponding
diagnostic message. The memory then has to be cleared
manually.
Overflow warnings
Data logbook="Fill up buffer"
Options
•Off
•On
Factory setting
Off
Decide whether you want to receive a diagnostic message
from the controller in the event of memory overrun of the
logbook in question.
Line plotter Menu to define the graphic display
Axes Options
•Off
•On
Factory setting
On
Should the axes (x, y) be displayed (On) or not (Off)?
Orientation Options
• Horizontal
• Vertical
Factory setting
Horizontal
Path: Menu/Setup/General settings/Logbooks
Function Options Info

General settings
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Example for setting up a new data logbook
1. Menu/Setup/General settings/Logbooks/Data logbooks/Scan time: Specify the interval between
two logbook entries.
2. .../New:
a. Logbook name: Assign a name, e.g. "01".
b. Source of data: Select a data source, e.g. the sensor connected to channel 1 (CH1).
c. Measured value: From the sensor signals, select the signal that you want to record.
3. ../Finished: Execute this action.
--> Your new logbook now appears in the list of data logbooks.
4. Select the data logbook with the name "01".
5. Activate the logbook by going to "Data logbook" and specifying Ring buffer or Fill up buffer, as the
type of memory.
6. If you selected "Fill up buffer", you can also decide whether you want to receive a diagnostic
message in the event of memory overrun.
7. Depending on the type of memory selected, your receive information about the memory space (for
"Ring buffer") or the time remaining until memory overrun (for "Fill up buffer").
8. Define the graphic display mode in the "Line plotter" submenu.
2.5 Extended setup
2.5.1 Diagnostics settings
This branch, along with the same functions, can be found in different "Extended setup" menus.
The list of diagnostic messages displayed depends on the path selected. There are device-specific
messages, and messages that depend on what sensor is connected.
X-Description Options
•Off
•On
Factory setting
On
Decide whether a description should be displayed for the
axes and whether grids should be shown. In addition, you
can also decide whether a pitch should be displayed.
Y-Description
Grids
Pitches
X Pitch/Grid distance 10 ... 50%
Factory setting
10 %
Specify the pitch.
Y Pitch/Grid distance
Path: ... /Extended setup/Diagnostics settings/Diag. behavior
Function Options Info
List of diagnostic messages Select the message to be changed. Only then can you make
the settings for this message.
Path: Menu/Setup/General settings/Logbooks
Function Options Info

General settings
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2.5.2 HART bus address
If Multidrop is active (Bus address > 0), the current at current output 1 is always set to 4 mA.
Here, it does not matter what function has been assigned to the output (measured value/controller
etc.). Current simulation is no longer possible.
Diag. code Read only
Diagnostic message Options
•On
•Off
Factory setting
Depends on the message
You can deactivate or reactivate a diagnostic message here.
Deactivating means:
• No error message in the measuring mode
• No error current at the current output
Error current Options
•On
•Off
Factory setting
Depends on the message
Decide whether an error current should be output at the
current output if the diagnostic message display is activated.
Status signal Options
• Maintenance (M)
• Out of specification (S)
• Function check (C)
• Failure (F)
Factory setting
Depends on the message
The messages are divided into different error classes in
accordance with NAMUR NE 107.
--> BA445C "Maintenance&diagnostics"
Diag. output Options
•None
• Alarm relay
• Relay 1 to n (depends on
the device version)
Factory setting
None
You can use this function to select an output to which the
diagnostic message should be assigned.
You first have to configure a relay output before being able to
assign the message to an output (Menu/Setup/Outputs,
assign "Diagnostics" function and set Operating mode to "as
assigned").
One alarm relay is always available, regardless of the device version. Other relays are optional.
Cleaning program Options
•None
• Cleaning 1
• Cleaning 2
• Cleaning 3
• Cleaning 4
Factory setting
None
Decide whether the diagnostic message should trigger a
cleaning program.
You can define the cleaning programs under:
Menu/Setup/Additional functions/Cleaning.
Detail information Read only Here you can find more information on the diagnostic
message and instructions on how to resolve the problem.
Path: ... /Extended setup/Diagnostics settings/Diag. behavior
Function Options Info

General settings
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If you reset the device to the factory settings (Diagnostics/Systemtest/Reset/Factory default), the
bus address is not reset. Your setting is retained.
2.5.3 Data management
Firmware update
Please contact your local sales office for information on firmware updates available for your controller
and its compatibility with earlier versions.
Your current firmware version can be found at: Menu/Diagnostics/System information/Software
version.
First save your current setup on an SD card since a firmware update overwrites your settings with
the factory settings. After updating the firmware, you can restore your setup by uploading it from
the SD card.
To install a firmware update, you must have the update available on an SD card.
1. Insert the SD card into the controller card reader.
2. Go to: Menu/Setup/General settings/Extended setup/Data management/Firmware update.
--> The update files on the SD card are displayed.
3. Select the desired update and select yes when the following question is displayed: The current
firmware will be overwritten. After this the device will reboot. Do you want to proceed?
--> The firmware is loaded and the device is then started with the new firmware.
Saving the setup
Saving the setup gives you the following advantages:
• Quick and easy to restore a setup following a firmware update
• Copying settings for other devices
• Quick and easy switching between various setups, e.g. for different user groups or for recurring sensor
type change
• Restoring a tried-and-tested setup, e.g. if you have changed a lot of settings and no longer know what
the original settings were
1. Insert the SD card into the controller card reader.
2. Go to: Menu/Setup/General settings/Extended setup/Data management/Save setup.
3. Assign a file name (Name).
4. Then select "Save".
Path: Menu/Setup/General settings/Extended setup/HART
Function Options Info
Bus address 0 ... 63
Factory setting
0
You can change the device address to integrate several HART
devices in a network (Multidrop mode).

General settings
12 Endress+Hauser
5. If you have already assigned the file name, you will be asked whether you want to overwrite the
existing setup.
Select "OK" to confirm, or cancel the action and give the file a new name.
--> Your setup is stored on the SD card and you can upload it quickly to the device at a later date.
Loading the setup
You can load a setup you have saved quickly and easily:
1. Insert the SD card into the controller card reader.
2. Go to: Menu/Setup/Data management/Load setup.
--> A list of all the setups on the SD card is displayed.
3. Select the desired setup.
The device then displays the following message: The current parameters will be overwritten and
the device will reboot. Do you want to proceed?
4. Select "OK" to confirm or cancel the action.
--> The desired setup is restored after restarting the device.
Exporting the setup
Exporting the setup gives you the following advantages:
• Export in xml format
• Import the data e.g. into MS Excel (drag&drop the xml file in an open Excel window)
1. Insert the SD card into the controller card reader.
2. Go to: Menu/Setup/General settings/Extended setup/Data management/Export setup.
3. Assign a file name (Name).
4. Then select "Export".
5. If you have already assigned the file name, you will be asked whether you want to overwrite the
existing setup.
Select "OK" to confirm, or cancel the action and give the file a new name.
--> Your setup is saved on the SD card.
Activation code
You require activation codes for:
• Additional functions, e.g. other inputs
• Software upgrades
1. Install the hardware or load the new software.
2. Go to: Menu/Setup/General settings/Extended setup/Data management/Activation code.
3. Enter the activation code which you received with the hardware or software.
4. Then select "Confirm".
--> Your new hardware or software is now activated and you can now be configured.

Information on sensors with the Memosens protocol
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3 Information on sensors with the Memosens protocol
Sensors with the Memosens protocol have integrated electronics that save calibration data and other
information. The sensor data are automatically communicated to the transmitter when the sensor is
connected and are used to calculate the measured value.
Data digital sensors save include:
• Manufacturer data
– Serial number
– Order code
– Date of manufacture
• Calibration data
– Date of calibration
– Calibration values
– Number of calibrations
– Serial number of the transmitter used to perform the last calibration
• Operating data
– Date of initial commissioning
– Hours of operation under extreme operating conditions
– Sensor monitoring data
The specific data that are recorded and communicated to the transmitter depend on the sensor
used. Differences can also occur within a sensor type.
This causes different menu items to be displayed or hidden depending on the sensor connected.
Pay attention to specific information in this manual.
Example:
The amperometric oxygen sensor COS51D cannot be sterilized. For this reason, you will not be able to
define limit values for sterilization in the diagnostics settings for this sensor. On the other hand, these
menu items are displayed for a sterilizable amperometric sensor, such as COS22D.

Inputs: General
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4 Inputs: General
An input can be configured in one of two ways:
1. Configuration where a sensor is not connected
►Select the appropriate channel.
►From the list of sensor types, select the sensor which you want to configure.
►Configure the channel as explained in following sections.
►Connect the selected sensor type later on.
2. Configuration where a sensor is connected
►Configure the channel as explained in following sections.
The following applies when configuring with a sensor:
• Some settings require sensor communication.
You cannot make these settings if a sensor is not connected.
• It is also possible to save a setup and transfer it to another device (see "Data management" in the
"General settings" section). This function might be a better option than performing a configuration
when a sensor is not connected.

Inputs: pH/ORP
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5 Inputs: pH/ORP
5.1 Basic settings
5.1.1 Sensor identification
5.1.2 Main value
5.1.3 Damping
The damping causes a floating average curve of the measured values over the time specified.
Path: Menu/Setup/Inputs/<Sensor type>
Function Options Info
Channel Options
•On
•Off
Factory setting
On
On
The channel display is switched on in the measuring mode
Off
The channel is not displayed in the measuring mode,
regardless of whether a sensor is connected or not.
Sensor type Read only
(Only available if a sensor is
connected)
Connected sensor type
Order code Order code of the connected sensor
Path: Menu/Setup/Inputs/pH or ORP
Function Options Info
Main value Options
• pH (only pH sensor)
•mV
• % (only ORP sensor)
Factory setting
pH (pH sensor)
mV (ORP sensor)
Select how the main measured value should be displayed.
You can display the main measured value of a pH sensor as a
pH value or as a raw value in mV.
If using an ORP sensor, here you decide which ORP mode to
use: mV or %. Subsequent configuration options depend on
the option selected here.
Path: Menu/Setup/Inputs/<Sensor type>
Function Options Info
Damping <Sensor type> 0 to 300 s
Factory setting
0 s
You specify the damping of the main measured value of the
connected sensor and that of the integrated temperature
sensor.
Damping temp.

Inputs: pH/ORP
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5.1.4 Manual hold
5.2 Extended setup
5.2.1 Temperature and medium compensation (only pH)
Path: Menu/Setup/Inputs/<Sensor type>
Function Options Info
Manual hold Options
•On
•Off
Factory setting
Off
On
You can use this function to set the channel manually to
"Hold".
Off
No hold
Path: Menu/Setup/Inputs/pH/Extended setup
Function Options Info
Temp. compensation Options
•Off
•Automatic
• Manual
Factory setting
Automatic
Decide how you want to compensate the medium
temperature:
• Automatically using the temperature sensor of your
sensor (ATC)
• Manually by entering the medium temperature
•Notatall
This setting only refers to compensation during measurement. You enter the compensation for calibration in the calibration
settings.
Medium comp. Options
•Off
•2-point
•Table
Factory setting
Off
Take a sample from the medium and determine its pH value
at different temperatures in the lab.
Decide whether you want to compensate using two points or
several points in a table.
The dissociation of water changes with increasing temperature. The balance shifts towards the protons; the pH value drops.
You can balance out this effect with the "Medium compensation" function.
Internal buffer
(only pH glass)
pH 0 to 14
Factory setting
pH 7.00
Only change the value if you are using a sensor with an
internal buffer other than pH 7.

Inputs: pH/ORP
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5.2.2 Measured value formats
5.2.3 Cleaning
5.2.4 Calibration settings
Stability criteria
You define the permitted measured value fluctuation which must not be exceeded in a certain
timeframe during calibration.
If the permitted difference is exceeded, calibration is not permitted and is aborted automatically.
Path: Menu/Setup/Inputs/pH or ORP/Extended setup
Function Options Info
Main value format
(only pH)
Options
•#.#
•#.##
Factory setting
#.#
Specify the number of decimal places for displaying the main
measured value.
Temperature format Options
•#.#
•#.##
Factory setting
#.#
Select how many decimal places should be used to display
the temperature.
Path: Menu/Setup/Inputs/<Sensor type>/Extended setup
Function Options Info
Cleaning Options
•None
• Cleaning 1
• Cleaning 2
• Cleaning 3
• Cleaning 4
Factory setting
None
Select a cleaning program.
This program is executed if:
• A diagnostics message is present at the channel and
• A cleaning process has been specified for this message
(--> "Inputs/Diagnostics settings/Diag. behavior").
You define the cleaning programs in the "Setup/Additional functions/Cleaning" menu.

Inputs: pH/ORP
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Buffer recognition (only pH)
Automatic buffer recognition
To ensure a buffer is detected correctly, the measuring signal may deviate by a maximum of 30 mV from
the value stored in the buffer table. This is approx. 0.5 pH at a temperature of 25˚C. If both buffers -
9.00 and 9.20 - were used, this would cause the signal intervals to overlap and buffer recognition would
not work. For this reason, the device would recognize a buffer with a pH of 9.00 as a pH of 9.20. --> Do
not use the buffer with a pH of 9.00 for automatic buffer recognition.
Path: Menu/Setup/Inputs/<Sensor type>/Extended setupCalib. settings
Function Options Info
Stability criteria
Delta mV 1 to 10 mV
Factory setting
1mV
Permitted measured value fluctuation during calibration
Duration 10 to 60 s
Factory setting
20 s
Timeframe within which the permitted range for measured
value fluctuation should not be exceeded
Path: Menu/Setup/Inputs/pH/Extended setup/Calib. settings
Function Options Info
Temp. compensation Options
•Off
•Automatic
• Manual
Factory setting
Automatic
Decide how you want to compensate the buffer temperature:
• Automatically using the temperature sensor of your
sensor (ATC)
• Manually by entering the buffer temperature
•Notatall
Temperature
Temp. compensation="Manual"
-50 to 250 ˚C (-58 to 482 ˚F)
Factory setting
25 ˚C (77 ˚F)
Specify the buffer temperature.
This setting only refers to compensation during calibration, not in measuring mode. You perform the compensation in the
measuring mode further down in the menu.
Buffer recognition Options
•Fixed
•Automatic(only pH glass)
• Manual
Factory setting
Fixed
Fixed
You choose values from a list. This list depends on the setting
for "Buffer manufacturer".
Automatic (only pH glass)
The device recognizes the buffer automatically. The
recognition depends on the setting for "Buffer manufacturer".
Manual
You enter any two buffer values. These must differ in terms
of their pH value.

Inputs: pH/ORP
Endress+Hauser 19
Calibration timer and calibration expiration date
You can specify the calibration interval for the sensor here.
Once the time configured elapses, the "Calibration timer" diagnostics message appears on the display.
The timer is reset automatically if you recalibrate the sensor.
Buffer manufacturer Options
• Endress+Hauser
•Ingold/Mettler
• DIN 19266
• DIN 19267
• Merck/Riedel
• Hamilton
• Special buffer
Factory setting
Endress+Hauser
Temperature tables are stored internally in the unit for the
following pH values:
• Endress+Hauser
2,00 / 4,00 / 7,00 / (9,00) / 9,20 / 10,00 / 12,00
•Ingold/Mettler
2,00 / 4,01 / 7,00 / 9,21
• DIN 19266
1,68 / 4,01 / 6,86 / 9,18
• DIN 19267
1,09 / 4,65 / 6,79 / 9,23 / 12,75
• Merck/Riedel
2,00 / 4,01 / 6,98 / 8,95 / 12,00
• Hamilton
1,09 / 1,68 / 2,00 / 3,06 / 4,01 / 5,00 / 6,00
7,00 / 8,00 / 9,21 / 10,01 / 11,00 / 12,00
You have the possibility of defining two buffers of your own with the "Special buffer" option. For this purpose, two tables
are displayed in which you can enter value pH value/temperature value pairs.
Path: Menu/Setup/Inputs/<Sensor type>/Extended setupCalib. settings
Function Options Info
Calibration timer Options
•Off
•On
Factory setting
Off
Switches the function on or off
Calibration timer
Calibration timer="On"
1 to 10000 h
Factory setting
1000 h
Specify the time after which the timer should have timed
out. Once this time has elapsed, the "Calib. Timer"
diagnostics message, along with the code 102, appears on
the display.
Calib. expiration date Options
•Off
•On
Factory setting
Off
The function checks whether the calibration of a sensor is
still valid.
Example: You install a precalibrated sensor. The function
checks how much time has elapsed since the sensor was last
calibrated. A diagnostics message is displayed if the time
since the last calibration is longer than the predefined
warning and alarm limit.
Calib. expiration date
Warning limit Factory setting
11 months
Diagnostics message: 105 "Calib. validity"
Warning and alarm limits mutually affect each other's
possible ranges for adjustment.
Path: Menu/Setup/Inputs/pH/Extended setup/Calib. settings
Function Options Info

Inputs: pH/ORP
20 Endress+Hauser
5.2.5 Diagnostics settings
This menu branch is used for specifying warning limits, and for defining whether and how diagnostics
tools should be used.
The associated diagnostics code is displayed for every setting.
Sensor check system (only pH glass)
The sensor check system (SCS) monitors the high impedance of the pH glass.
An alarm is issued if a minimum impedance value is undershot or a maximum impedance is exceeded.
• Glass breakage is the main reason for a drop in high impedance values.
• The reasons for increasing impedance values include:
– Dry sensor
– Worn pH glass membrane
Alarm limit Factory setting
12 months
Diagnostics message: 104 "Calib. validity"
General rule:
Alarm limit > warning limit
Path: Menu/Setup/Inputs/pH/Extended setup/Diagnostics settings
Function Options Info
Glass impedance (SCS) 0 to 10000 MΩSpecify your limit values for monitoring the impedance of the
pH glass.
Function Options
•On
•Off
Factory setting
On
On
SCS operates with the following settings for the warning and
alarm limits.
Off
SCS is switched off.
Upper alarm limit Factory setting
2000 MΩ
Diagnostics code and associated message text:
124 "Sensor glass"
Upper warning limit Factory setting
1600 MΩ
Diagnostics code and associated message text:
125 "Sensor glass"
Lower warning limit Factory setting
1 MΩ
Diagnostics code and associated message text:
123 "Sensor glass"
Lower alarm limit Factory setting
0 MΩ
Diagnostics code and associated message text:
122 "Sensor glass"
Path: Menu/Setup/Inputs/<Sensor type>/Extended setupCalib. settings
Function Options Info