Metrohm 940 Professional IC Vario ONE/Proep 2 - Manual (Page 85)

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5 Operation and maintenance
940 Professional IC Vario ONE/Prep 2 (2.940.1120)
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5.14.2.2 Replacing the filter
The filters inserted into the pump tubing connection with safety device
and filter (6.2744.180) have to be replaced regularly.
Maintenance interval We recommend replacing the filters (6.2821.130) (23-2) every 3 months.
The filters have to be replaced more frequently if the backpressure is
higher.
Accessories For this step you need the following accessories:
￭ 1 filter from the spare filter set (6.2821.130)
￭ 2 adjustable wrenches (6.2621.000)
￭ Tweezers
Replacing the filter
Figure 23 Pump tubing connection – Replacing the filter
1 Tubing olive 2 Filter (6.2821.130)
Packaging contains 10 pieces.
3 Filter screw
1 Unscrewing the filter screw
￭ Unscrew the filter screw (23-3) from the tubing olive (23-1) using
the two adjustable wrenches.
2 Replacing the filter
￭ Remove the old filter (23-2) using tweezers.
￭ Place the new filter (23-2) flat in the tubing olive (23-1) using
tweezers.
3 Mounting the filter screw
￭ Screw the filter screw (23-3) back into the tubing olive (23-1) and
start by tightening it by hand. Finish tightening it using the two
adjustable wrenches.