Thermo Scientific Dionex ICS-2000, Руководство оператора

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ICS-2000 Ion Chromatography System
4-22
Doc. 031857-03 4/06
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 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 suppressor eluent ports.
•
Pump not properly primed
Prime the pump (see Section B.13 ).
•
Incorrect eluent
Check the EGC concentration setting.
•
Inadequate system backpressure
Add backpressure tubing between the injection valve and the
ELUENT OUT
port on the EGC to maintain a pressure of 16 ± 0.7 MPa (2300 ± 100 psi). See
Section B.16.1 for details.
•
Rapid changes in ambient temperature
Make sure the ambient temperature is between 4 and 40 °C (40 and 104 °F).
Make sure air conditioning and heating vents are directed away from the ICS-
2000 and the ICS-2000 front door is closed.
•
Insufficient system equilibration following changes to operating
parameters; especially apparent when operating at high sensitivities
Allow a longer system equilibration time (up to 2 hours) before starting
operation.
•
Incorrect suppressor operating conditions
Refer to the suppressor manual for troubleshooting information. Suppressor
manuals are included on the Dionex Reference Library CD-ROM
(P/N 053891).