Dionex ICS-900 - Baseline Noise or Drift

4 • Troubleshooting
Doc. 065215-02 9/09 63
• Cell out of calibration
Recalibrate the cell from the Wellness panel (see Section 5.1
).
4.13 Baseline Noise or Drift
• Flow system leak; erratic baseline
Check all fittings and liquid lines for leaks. Tighten or, if necessary, replace
all liquid line connections. Refer to Installation of Dionex Liquid Line Fittings
(Document No. 031432) for tightening requirements. The manual is included
on the Dionex Reference Library CD-ROM (P/N 053891).
• Trapped gases
Release any trapped gases in the cell by loosening the lines to and from the
cell and then retightening them. Also loosen and retighten the fittings to and
from the MMS eluent ports.
• Pump not properly primed
Prime the pump (see Section 3.6
).
• Contaminated or incorrect eluent and/or regenerant
Remake the eluent and regenerant (see Section 3.4
).
• Rapid changes in ambient temperature
If the ambient temperature does not meet the specification of 10 to 35 °C (50
to 95 °F), verify that air conditioning and heating vents are directed away
from the ICS-900 and the ICS-900 front door is closed.
• Insufficient conductivity cell backpressure
Verify that the correct backpressure coils are installed:
Standard bore systems: Use one or two black backpressure coils
(P/N 045877) supplied in the ICS-900 Ship Kit (P/N 067768).
Flow Rate Number of Coils
1.5 to 3.0 mL/min
1 (black)
0.5 to 1.5 mL/min
2 (black)