Liquistation CSF48 Inputs: General
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The main causes of stagnating measured values are:
• Sensor fouled or outside the medium
•Sensor defective
• Process error (e.g. through control system)
Remedial action
‣ Clean the sensor.
‣ Check the position of the sensor in the medium.
‣ Check the measuring chain.
‣ Switch off the controller and switch it back on again.
9.2.6 Diagnostic behavior
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.
Path: Menu/Setup/Inputs/<Sensor type>/Extended setup/Diagnostics settings
Function Options Info
Process Check System Diagnostics code and associated message text:
904 "Process check"
Function Options
•On
•Off
Factory setting
Off
Duration 1 to 240 min
Factory setting
60 min
The measured value must change during this time.
Otherwise the error message is triggered.
Tolerance width
Not available for pH/ORP
The range depends on
the sensor
Factory setting
Depends on the sensor
Interval around the measuring signal (raw value) for
detecting stagnation.
Measured values within the set interval are regarded as
stagnating.
Path: ... /Extended setup/Diagnostics settings/Diag. behavior (optional)
Function Options Info
List of diagnostic messages Select the message to be changed. Only then can you
make the settings for this message.
Diag. code Read only
Diagnostic message Options
•On
•Off
Factory setting
Depends on the message
You can deactivate or reactivate a diagnostics message
here.
Deactivating means:
• No error message in the measuring mode
• No error current at the current output
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