Hach-Lange POLYMETRON 9245 User Manual - Manual (Page 108)

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Troubleshooting
10.2 Detection of functional faults
10.3 Miscellaneous problems
Table 11 Lack of precision
PROBLEM CAUSE/SOLUTION
Electrolyte is polluted. Check parts and change the electrolyte.
Electrolyte leaks. Check parts and change the electrolyte.
Error during calibration or incorrect calibration.
Calibrate again to check the parameters. If the error is
confirmed, check the calibration current (too high, too low or
unstable).
Temperature has not been calibrated.
Check the temperature given by the transmitter and calibrate
it (see
Temperature calibration on page 92 ). If you have
chosen manual compensation check the value is correct.
Flow rate too low (6 to 9 L/hour recommended). Check the sample inlet circuit.
The sample temperature or pressure is out of specification.
Change the electrode location or modify the sample so that it
meets the specifications.
Table 12 Miscellaneous problems
PROBLEM CAUSE/SOLUTION
The electrode potential is null when measuring.
There is no electrolyte in the electrode (possible leakage).
There is no sample in the cell.
The electrode potential is negative.
Connection problem (loose contact) to the anode circuit.
Leak of electrolyte.
The sample temperature does not correspond to
specifications. There may be a short-circuit on the temperature connection or
temperature electrode calibration was not performed correctly.
Concentration displayed on the screen falls abnormally.
Replace the electrolyte.
The sample flow rate is insufficient.