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CS525 ISFET pH Probe

7. Troubleshooting

The most common causes for erroneous pH data include:

x poor sensor connections to the datalogger

x damaged cables

x scratched chip

Problem:

Output signal is at its maximum value.

Possible reason:

x Probe is not in fluid.

x Chip is polluted.

x Diaphragm is polluted.

x Chip is scratched.

Suggestion:

x Put probe in fluid.

x Clean probe using soapy water method.

x Probe can not be fixed if chip is scratched.

Problem:

Probe response is very slow.

Possible reason:

x Diaphragm is chipped or polluted

Suggestion:

x Clean probe with soapy water method.

Problem:

Probe signal is drifting.

Possible reason:

x Diaphragm can be dried out.

x Chip is scratched.

Suggestion:

x Soak probe for 10 minutes in saturated KC1 solution (CSI PN 16349).

x Probe can not be fixed.

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Campbell CS525 Spezifikationen Seite 14