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3. Verify that the white working electrode lead is connected to junction
J1 and the reference electrode cable is connected to J2.
Look for salt on the cell pre-amp board. If salt is present, brush it off with a
clean dry brush and then spray with a quick drying solvent to dissolve the
remaining salt.
Replace the reference electrode (P/N 046333) (see Section B.5 for
instructions).
4.7
Cannot Set Amperometry Cell pH Readout to 7.0
The pH reading is displayed on the
•
Inaccurate calibration buffer
Use a pH meter to check the pH of the buffer.
•
Contaminated pH reference electrode
Soak the reference electrode in a solution containing 1 M KCl and 1 M HCl.
Replace the electrode (P/N 046333) (see Section B.5 for instructions).
4.8
Shift in Amperometry Cell pH Readout
•
Faulty reference electrode
If the pH value drifts by 0.5 pH units or more from the value observed when
the reference electrode was new, check the electrode by following the
instructions in Section 4.12. The electrode may need to be regenerated or
replaced.
4.9
No Amperometry Cell pH Readout or Intermittent
Readout
The pH reading is displayed on the
•
Disconnected or broken pH electrode leads
Check the reference electrode connections at junctions J1 and J2 on the cell
electronics card (see Figure 5-7).
Doc. 065551-01 6/13
4 • Troubleshooting
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