Thermo Scientific Dionex ICS-2000, Operator'S Manual

Page: 342 / 390

ICS-2000 Ion Chromatography System
C-18
Doc. 031857-03 4/06
Always Off
: The degas pump is always off.
Always On : The degas pump is always on. This setting is reserved for
test purposes by a Dionex Service Representative.
Duty Cycle : The degas pump cycles on and off according to the times
specified in the
Duty Cycle
and
Time Off
fields.
Duty Cycle
specifies
for how long the degas pump runs during a cycle; Time Off specifies
the time between cycles.
Monitor : The ICS-2000 monitors the degas pressure reading and
turns the degas pump on and off as required.
C.7.3 Controlling the Eluent Valve
The eluent valve controls flow from the
eluent reservoir. During routine operation,
the valve opens and closes automatically
when the pump flow is turned on and off. However, during eluent line
priming, you can use the controls on the
PUMP
page to manually open the
valve, allowing liquid to flow through the lines when the pump is off. See
Section B.13.2
for eluent line priming instructions.
Select the Degas Mode, Always On option only when testing the vacuum
degas assembly. Do not select the Always On option for routine use.