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Chapter 4 Maintenance and Troubleshooting
4.2 Troubleshooting
68
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ERROR No.0004 Zero calibration error
Definition
The asymmetry potential of the electrode is outside the
range of ±45 mV.
The temperature of
the sample solution
is fluctuating.
Measure after the sample solution tem-
perature stabilizes.
Cause
Countermeasure
Cause
Countermeasure
The electrode is
dirty.
Wash the electrode.
The electrode is
cracked.
Replace the electrode.
The standard solu-
tion concentration is
fluctuating.
Replace the internal solution in the refer-
ence electrode.
The electrode is not
connected correctly.
Connect the electrode correctly.
Electrode is not sub-
merged deeply
enough to cover ref-
erence junction.
Immerse the electrode in the sample, to at
least 3 cm beyond the electrode tip.
There is problem
with the standard
buffers.
Use new standard solution.
Содержание LAQUA F-71G
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