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
