Metrohm 930 Compact IC Flex ChS/Deg - Manual (Page 61)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
5 Operation and maintenance
930 Compact IC Flex ChS/Deg (2.930.1260)
￭￭￭￭￭￭￭￭ 53
5.1.4 Shutting down and starting back up
If the instrument is not used for a long period, the whole IC system (with-
out separation column) must be rinsed to be free of salts using methanol/
ultrapure water (1:4). This prevents eluent salts from crystallizing and then
causing damage.
Rinsing the IC system to be free of salts
1 In the software, stop the hardware and wait until the pressure in the
high-pressure pump has dissipated.
2 Remove the guard column and the separation column from the elu-
ent path. Connect the connection capillaries directly with each other
using a coupling (6.2744.040).
3 Rinse the IC system for 15 minutes with methanol/ultrapure water
(1:4).
4 Optional: Only if the IC system is equipped with a ChS plug-in or a
SeS plug-in.
In the software, switch the suppressor twice during the rinsing proc-
ess (STEP command).
5 Optional: Only if the IC system is equipped with a ChS/PP plug-in or a
SeS/PP plug-in.
Rinse the two pieces of pump tubing for the peristaltic pump with
water for 5 minutes at level 3. Finish by releasing the peristaltic
pump's contact pressure.
Putting the IC system back into operation
1 Check that a coupling (6.2744.040) is installed in place of the guard
column and the separation column.
2 Rinse the IC system with eluent for 15 minutes.
3 Remove the coupling and install the guard column and the separa-
tion column and (see Chapter 3.18, page 46).