CS525 ISFET pH Probe
8
7. Troubleshooting
The most common causes for erroneous pH data include:
•
poor sensor connections to the datalogger
•
damaged cables
•
scratched chip
Problem:
Output signal is at its maximum value.
Possible reason:
•
Probe is not in fluid.
•
Chip is polluted.
•
Diaphragm is polluted.
•
Chip is scratched.
Suggestion:
•
Put probe in fluid.
•
Clean probe using soapy water method.
•
Probe can not be fixed if chip is scratched.
Problem:
Probe response is very slow.
Possible reason:
•
Diaphragm is chipped or polluted
Suggestion:
•
Clean probe with soapy water method.
Problem:
Probe signal is drifting.
Possible reason:
•
Diaphragm can be dried out.
•
Chip is scratched.
Suggestion:
•
Soak probe for 10 minutes in saturated KC1 solution (CSI PN 16349).
•
Probe can not be fixed.
