Shutting Down And Recommissioning - Metrohm 883 Basic IC plus Manual

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4.1.4

Shutting down and recommissioning

883 Basic IC plus
If the instrument is no longer used for a prolonged period, remove the
guard column and the separation column. Rinse the IC system until it is
salt-free with a mixture of methanol and ultrapure water (1:4). This pre-
vents eluent salts from crystallizing and then causing damage.This prevents
eluent salts from crystallizing and then causing consequential 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 been released.
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
mixture (1:4).
4 In the software, switch the Metrohm Suppressor Module (MSM)
twice during the rinsing process at five-minute intervals in each case
(STEP command).
5 Rinse the pump tubing of the peristaltic pump used for pumping the
regeneration solution with water for 15 minutes at level 1. Finish by
releasing the contact pressure at the peristaltic pump.
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 freshly prepared eluent for 15 minutes.
3 Remove the coupling and install the guard column and the separa-
tion column (see Chapter 3.19, page 49 and Chapter 3.20, page 51).
4 Operation and maintenance
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