ICS-3000 Ion Chromatography System
198 Doc. 065031-04 1/08
8.14 DP/SP Stops
• Program (or other remote input) instructed the pump to stop
If no error message is displayed in the Audit Trail, the DP/SP was probably
instructed to stop by the Chromeleon or Chromeleon Xpress program, the
computer, or other remote signal source. If you do not want the pump to stop,
take the appropriate preventive action (edit the program, etc.).
• Low pressure limit was tripped
1. Verify that the Minimum Pressure setting is several hundred psi below
the Current Pressure reading on the Chromeleon or Chromeleon Xpress
Control panel.
2. Make sure there are no liquid leaks in the flow system.
3. Check the Eluent Level Display on the Chromeleon or Chromeleon
Xpress Control panel to verify that eluent is present in the selected
channel. If the eluent reservoir is empty, refill it (or select a channel that
does have eluent). Prime the pump before resuming operation (see
Section 9.3
).
4. Make sure the priming valve is closed (see Figure 2-3
). To close the
valve, turn the knob clockwise until closed. Tighten no more than
fingertight.
• High pressure limit was tripped
1. Make sure that no tubing is plugged or overtightened. To determine the
source of the high backpressure, isolate segments of the flow path:
a. Remove the pump outlet tubing at the injection valve.
b. Press the
POWER button on the front of the DP/SP to turn on the
pump.
c. Set the Flow rate to 1.0 mL/min on the Chromeleon or Chromeleon
Xpress Control panel and record the backpressure.
d. One at a time, reconnect each component of the flow path. If
reconnecting a component causes an abnormal increase in
Do not use any tools to tighten the priming valve! Overtightening may
destroy the cap seal. Open or close the priming valve only when the
system pressure is down.
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