Troubleshooting – Campbell Scientific CS525 ISFET pH Probe User Manual
Page 14
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.
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