GE AKTAprocess, Руководство по эксплуатации

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Conductivity
The table below describes error symptoms that may occur with conductivity measure-
ments, together with possible corrective actions.
Corrective action Possible cause Error symptom
Tighten the clamps. If necessary, re-
place the clamps. Leaking tube connections Baseline drift or noisy signal
See separate manual Bad pump
Clean the conductivity cell, refer to
Clean the UV and conductivity cell, on
page 136 Dirty conductivity cell
Calibrate the conductivity cell, see
separate manual Bad calibration Absolute conductivity value is
wrong
Recalibrate using a new calibration
solution Calibration solution not cor-
rectly prepared
Check the pump and the valves Bad pump or valve action Incorrect or unstable reading
Check the temperature compensation,
see separate manual Temperature compensation
not properly set
pH curve
The table below describes error symptoms that may occur with pH measurements,
together with possible corrective actions.
Corrective action Possible cause Error symptom
Check the cable connection The cable to the electrode not
properly connected No response to pH changes
Replace the electrode The electrode membrane
might be cracked
Clean the electrode, see manufactur-
ers's manual The electrode membrane
might be contaminated Small or slow response to pH
changes
Calibrate the pH sensor as described
in Section 6.5 Calibration of pH probe,
on page 148 pH sensor not properly cali-
brated pH reading appears to be in-
correct
162 ÄKTAprocess Operating Instructions 29-0252-49 AA
7 Troubleshooting