LF 170 What to do if ...
117
ba54104e09 11/2010
6 What to do if ...
The conductivity
measuring cell cannot
be activated
Display OFL
The cell constant is
outside the valid range
The measurement
provides implausible
measured values
Cause Remedy
– Contact problems – Check the connections of the
conductivity measuring cell
Cause Remedy
– The measured conductivity or
temperature value is outside
the measuring range
– Check the measurement
conditions
Cause Remedy
– Conductivity measuring cell
soiled
– Clean conductivity measuring
cell acc. to operating manual
– Control standard soiled – Use new control standard
– Only immerse clean and
virtually dry conductivity
measuring cell in the control
standard
Note:
Only ever use the control
standard once.
– Fluctuating temperature
measured values
– Ensure stable temperatures
Cause Remedy
– Contact problems – Check the electrode
connections
– Conductivity measuring cell
soiled
– Clean conductivity measuring
cell acc. to operating manual
– Air trapped in the vicinity of
the measuring cell electrode
– Ensure a measuring
environment free of air bubbles
– Incorrect temperature
compensation
– Use the linear temperature
function to check/correct
compensation temperature
during compensation
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