Campbell-scientific CS525 ISFET pH Probe Manual de usuario descargar pdf (Pagina 14)

CS525 ISFET pH Probe

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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Campbell-scientific CS525 ISFET pH Probe Manual de usuario Pagina 14