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ADFM® Flow Meter
Section 3 Maintenance and Troubleshooting
3-4
3.2.2 Canister Controller
Desiccant
The canister controller desiccant is in a bag that cannot be regen-
erated and must be replaced.
CAUTION
Opening the electronics cover on the canister will void the
NEMA/IP rating. To preserve the NEMA/IP rating, send the
canister controller to the factory for service and inspection of
the desiccant.
If you choose to void the NEMA/IP rating, only open the case in a
clean, dry environment. You can access the desiccant bag for
replacement and inspect the controller interior for humidity by
performing the following steps:
1. Remove the four
3
/
16
" Allen screws holding the electronics
cover in place.
Figure 3-2 Canister controller: opening the electronics lid
2. The interior electronics are attached to the lid. Laying the
controller on its side, very carefully ease the lid a few
inches away from the case (Figure 3-3).
Wiring from the battery compartment is connected to the
electronics.
Do not attempt to pull the electronics all
the way out of the case.
3. A humidity indicator card is located inside the case along
with the desiccant bag. The indicator turns pink or white
when the humidity level exceeds the printed value. Ideally,
all three sections of the indicator should be blue. If the 20%
and 30% sections are pink or white, replace the desiccant.
(The card may be square or round.)
Part #099-0002-01
Allen
screws (4)