ProMinent DULCOMETER Assembly And Operating Instructions Manual page 57

Incorrect calibration
An error message 'ERR' appears
if the result of the calibration lies
outside the specified tolerance
limits. In this case, the current cali‐
bration is not applied.
Check the prerequisites for calibra‐
tion and clear the error. Then
repeat calibration.
If the calibration is again incorrect,
refer to the information provided in
the sensor operating instructions.
During calibration, the controller sets the
'0' . Exception: If a basic
control outputs to
load or a manual control variable has
been set. This remains active. The mA
standard signal output is frozen.
When calibration has been completed
successfully, all the error checks relating
to the measured value are restarted. The
controller saves the data determined for
the cell constant and temperature coeffi‐
cient when calibration is successful.
The conductivity sensors can be cali‐
brated using 3 different methods. The cell
constant is adjusted directly or indirectly
with all methods:
Calibration compared to a reference
n
solution
Calibration compared to a reference
n
measurement (e.g. manual measuring
device)
Calibration by entering a precisely
n
known or determined cell constant
Operating menus
57