Metrohm 872 Extension Module IC Pump - Manual (Page 59)

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6 Operation and maintenance
872 Extension Module IC Pump
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Mounting the pump head
Note
To prevent the pump head from being positioned the wrong way, it is
provided with different bore hole depths for the fastening bolts, i. e. a
fastening bolt is longer than all others. The bore hole with the greatest
depth must therefore be assigned to the longest bolt. If this is not the
case, the pump will not function perfectly.
1 Mount the pump head on the pump again using the four fastening
screws (20-5). Firmly tighten the screws with the 6.2621.030 hexa-
gon key.
2 Screw connection capillaries (20-1), (20-7) and (20-13) onto the
pump head again.
6.5 Inline filter
6.5.1 Maintenance
The 6.2821.120 inline filters comprise the filter housing (34-2), the filter
screw (34-4) and the flter (34-3). New filters (34-3) are available under
the order number 6.2821.130 (10 items).
The 6.2821.130 filters (23-3) should be changed every 3 months (more
frequently at higher backpressure).
1 2 3 4 1 5 5
Figure 34 Changing the filter
1 PEEK pressure screws, short
6.2744.070 2 Filter housing
Housing of the inline filter. Part of the
6.2821.120 accessories.
3 6.2821.130 filter
Packaging contains 10 items. 4 Filter screw
Screw of the inline filter. Part of the
6.2821.120 accessories.
5 Connection capillaries