Endress+Hauser Liquistation CSF48 - Page 123

Liquistation CSF48 Inputs: pH/ORP Incl. combi sensors
123
Delta zero point (only pH glass or combi sensor) or Delta operating point (only pH ISFET)
The device determines the difference between the last calibration and the penultimate
calibration, and issues a warning or an alarm depending on the setting configured. The
difference is an indicator for the condition of the sensor. The following applies to pH glass
electrodes: The greater the change, the greater the wear experienced by the reference as a result
of contaminating ions or KCl dissolving away.
Sterilizations
--> "Inputs: General/Frequently occurring functions" section  ä 108
Diagnostic behavior
--> "Inputs: General/Frequently occurring functions" section  ä 108
10.2.6 Tag control
--> "Inputs: General/Frequently occurring functions" section  ä 108
10.2.7 Sensor replacement
--> "Inputs: General/Frequently occurring functions" section  ä 108
10.2.8 Data processing factory setting
--> "Inputs: General/Frequently occurring functions" section  ä 108
Path: Menu/Setup/Inputs/pH or pH/Redox/Extended setup/Diagnostics settings
Function Options Info
Delta zero point (pH glass or
combi sensor) Delta
operating point (pH ISFET)
pH glass
pH 0.00 to 2.00
pH ISFET
0to950mV
Specify your limit values for monitoring the zero point or
operating point differential.
Function Options
•On
•Off
Factory setting
Off
Warning limit Factory setting
pH 0.50 / 25 mV
Diagnostics code and associated message text:
520 "Sensor calib." (pH glass)
522 "Sensor calib." (pH ISFET)