Teledyne ADFM Hot Tap, Installation And Operation Manual, Page: 89 / 116

ADFM® Flow Meter
Section 3 Maintenance and Troubleshooting
3-3
Figure 3-1 Internal desiccant canister
Inspect the desiccant canister each time the case is opened. The
desiccant canister has a window on its side that looks blue or
yellow when the desiccant is dry. As the desiccant absorbs
moisture, the pebbles in the window will turn from blue to pink,
or from yellow to green. When the pebbles turn pink or green, the
desiccant needs to be regenerated, or replaced with the spare
canister provided in the flow meter's accessory package.
Remove the canister from the flow meter and heat it in a vented
oven at 300°F (150°C) for about three hours, or until the blue or
yellow color returns. After cooling, put the canister back in the
flow meter; make sure the window on the side of the canister
remains visible.
CAUTION
Desiccant may produce irritating fumes when heated. Leave
the room while the desiccant is being recharged.
Important Guidelines to Follow:
• Always use a vented, circulating forced air, convection
oven in a well-ventilated room.
• DO NOT use a microwave oven to recharge the desiccant
cartridge.
• Always use the recommended temperature. Never heat
the desiccant at higher than recommended tempera-
tures.
• Avoid heating the desiccant longer than necessary.
Desiccant
canister
Window