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ADFM® Flow Meter
Section 3 Maintenance and Troubleshooting
3.2 Desiccant
3.2.1 Box Controller
Desiccant
Part #099-0012-00
3-2
plastic are preferable; however, corrugated shipping
boxes of at least 200-lb test may also be used.
• Use a layer of shock absorbing material at least one inch
thick around all sides of the flow meter and transducer
assemblies to firmly cushion and prevent movement
within the container. Special care must be taken to
protect the transducer ceramics on the upper face of the
transducer assembly from damage.
• Seal the shipping container securely.
• Mark the container FRAGILE to ensure careful
handling.
• In any correspondence, refer to the system by model
number and serial number.
The ADFM flow meter uses desiccant to protect the internal com-
ponents from moisture damage. When the desiccant becomes sat-
urated, it must be replaced or reactivated.
If the controller is unable to connect, this could be an indication
of humidity within the controller.
Do not allow the flow meter to operate with saturated desic-
cant. In many flow environments, gases are present in the
atmosphere that can combine with available water vapor to
form acids. The acids formed this way can corrode the internal
components of the flow meter, ruining them. An active desic-
cant canister inhibits the formation of these acids by absorbing
water vapor. Keep the lid closed whenever possible. Inspect
and regenerate the canister when necessary.
Only open the controller case in a clean, dry environment.
As shown in Figure 3-1, the box controller is equipped with a
reusable desiccating canister attached to the inside of the case.
This canister contains silica gel that attracts moisture trapped
inside the flow meter's case when it is closed. This keeps the
inside of the case completely dry during shipment, storage, and
use. If you leave the case open, the desiccant will attract
moisture from the surrounding air. Eventually, its absorption
capacity will be reached, and it will no longer be able to protect
the internal components of the flow meter.
CAUTION
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Troubleshooting
