Commissioning Liquisys M CPM223/253
38 Endress+Hauser
Factory settings
The first time it is switched on, the device has the factory setting for all functions. The table
below provides an overview of the most important settings.
All other factory settings can be found in the description of the individual function groups in
the "System configuration" section (the factory setting is highlighted in bold).
* For corresponding version
Function Factory setting
Type of measurement pH or ORP absolute,
Temperature measurement in C
Type of measurement compensation Linear with reference temperature 25 °C (77 °F)
Temperature compensation Automatic (ATC on)
Limit value for controller 1 pH 16 (ORP: -1500 mV or 0 %)
Limit value for controller 2 pH 16 (ORP: +1500 mV or 100 %)
Hold Active during configuration and calibration
Contact 1 to 4 Limit contactor pH, function off
Current outputs 1* and 2* 4 to 20 mA
Current output 1: measured value for
4 mA signal current*
pH 2
Current output 1: measured value for
20 mA signal current*
pH 12
Current output 2: temperature value for
4 mA signal current*
0.0 °C (32 °F)
Current output 2: temperature value for
20 mA signal current*
100.0 °C (212 °F)
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