Hach Flo-Dar, Руководство пользователя

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35
Maintenance
5.6 Hydrophobic filter replacement procedure
1. Disconnect the tubing from the top of the desiccant canister.
2. Unscrew the hex-head tubing nipple from the top of the canister and discard the old
filter.
3. Discard any remnants of Teflon tape from the nipple threads. Apply two turns of
Teflon tape (Cat. No. 1085145) to the threads, pulling the tape into the threads until it
conforms to the shape of the threads.
4. Place a new filter over the hole. Make sure that the smooth side of the filter faces the
inside of the canister (
Figure 19 ).
5. Place the threaded nipple on top of the filter.
6. With a slight pressure, press the filter into the hole with the nipple threads and begin
threading the nipple into the hole. The filter will deflect upward and feed completely
into the thread until it disappears. The filter must rotate with the nipple as it is
threaded into the cap. If it does not, it is torn. Start over with a new filter.
7. Inspect the installation. In the upper cap, a small, dim light spot should be visible
when held up to the light. A bright spot indicates a torn filter. Start over with a new
filter.
Figure 19 Replacing the Hydrophobic Filter
1 Filter, smooth side down 3 Finished assembly
2 Hex-head tubing nipple