Thermo Scientific Dionex ICS-2000, Operator'S Manual

Page: 189 / 390

5 • Service
Doc. 031857-03 4/06
5-79
5. Verify that the suppressor is off.
6. Verify that the
Automatically turn on with pump
option is not
selected on the ICS-2000 touch screen
SUPPRESSOR
page (see
Section C.9 ). Disabling this option lets you turn on the pump, without
automatically turning on the suppressor.
7. Set the pump flow rate to the rate required for the application.
8. Turn on the pump.
9. Verify that the system backpressure is between 14 and 16 MPa (2000
and 2300 psi). If necessary, adjust the pressure by adding or removing
backpressure tubing.
10. Set the
EGC-1
and
EGC-2
concentrations to the values required for
your application. For example, for a 3.5 mM K
2
CO
3
/1.0 mM KHCO
3
mixture, set the
EGC-1
concentration to 3.5 mM and the
EGC-2
concentration to 1.0 mM.
11. Turn on the
EGC-1
and
EGC-2
currents.
12. Run at the selected settings until the mixer is filled with the eluent
mixture. At a flow rate of 1 mL/min it will take about 45 minutes to
fill the 4-mm mixer and about 15 minutes to fill the 2-mm mixer.
NOTE The void volume of the 4-mm mixer is about
16 mL. The void volume of the 2-mm mixer is
about 5 mL.
13. Turn off the
EGC-1
and
EGC-2
currents.
14. Turn off the pump.
15. Remove the backpressure coil from the
TO INJ VALVE IN - P/ELUENT
OUT
line and the mixer inlet. Reconnect the two lines.
16. Disconnect the mixer outlet from the
TO SRS/AES REGEN OUT
line
and remove the 10-32 to 1/4-28 coupler.
17. Reconnect the
TO SRS/AES REGEN OUT
line to the suppressor
REGEN
OUT
port.
18. Reconnect the mixer outlet line to port
P
(
2
) on the injection valve.
To avoid damaging the suppressor always turn off the suppressor
before filling the mixer. The pump flow is on during filling, however,
no flow reaches the suppressor.