ICS-3000 Ion Chromatography System
186 Doc. 065031-04 1/08
NOTE The EG leak sensor cannot immediately detect leakage
from the membrane barrier because these leaks exit the
EG through the vent line.
8.9 High System Backpressure
• Restriction in the system plumbing
1. Begin pumping eluent through the system (including the columns) at the
flow rate normally used.
2. Work backward through the system, beginning at the flow cell exit. One
at a time, loosen each fitting and observe the pressure. The connection at
which the pressure drops abnormally indicates the point of restriction. If
the EluGen cartridge is the source of the high backpressure, replace the
outlet frit as instructed in the EluGen cartridge manual. The manual is on
the Dionex Reference Library CD-ROM (P/N 053891).
3. If the restriction has caused such high pressure that the system cannot be
operated, you must work forward through the system, adding parts one at
a time until an abnormal pressure increase (and hence, the restriction) is
found.
• TC temperature stabilizer is blocked
Rinse the temperature stabilizer and the temperature stabilizer inlet line, using
an appropriate solvent. If necessary, replace the temperature stabilizer
(standard bore, P/N 064548; microbore, P/N 064650).
8.10 Low Detector Output
• Insufficient sample injected
Increase the injection size or concentration.
ED Only
• Working electrode fouled
1. If a disposable working electrode is being used, replace the electrode.
2. For conventional (nondisposable) electrodes, clean the working electrode
with ASTM Type I (18 megohm-cm) filtered and deionized water. Dry
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