Metrohm 872 Extension Module Suppression - Manual (Page 39)

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872 Extension Module Suppression ￭￭￭￭￭￭￭￭ 31
3 Mounting filter screw
￭ Screw the filter screw (10-3) back into the tubing olive (10-1) and
tighten by hand. Then additionally tighten with two 6.2621.000
adjustable wrenches.
5.4 Suppressor/SPM
5.4.1 Protection
To protect the suppressor/SPM against foreign particles or bacterial
growth, a pump tubing connection with filter (6.2744.180) (see Figure 6,
page 17) must be mounted between the peristaltic pump (see Figure 4,
page 15) and the inlet capillaries of the suppressor/SPM.
5.4.2 Operation Suppressor
Note
The suppressor units must never be regenerated in the same flow direc-
tion in which the eluent is pumped. Therefore always mount the inlet
and outlet capillaries according to the diagram outlined in figure 9.
The suppressor consists of 3 suppressor units, which are in rotation used
for suppression – regenerated with regeneration solution – rinsed with
ultra pure water. In order to record every new chromatogram under com-
parable conditions, you should normally work with a freshly regenerated
suppressor.
Caution
The suppressor must never be switched over in a dry state, as there is a
risk of jamming. If the suppressor is in a dry state, it must be rinsed for
at least 5 minutes before it may be switched over.
Caution
In the case of reduced capacity or high backpressure, the suppressor
must be regenerated (see Chapter 5.4.4.2, page 33), cleaned (see
Chapter 5.4.4.3, page 35) or replaced (see Chapter 5.4.4.4, page
36).