Teledyne 4250, Инструкция по установке и эксплуатации, Страница: 144 / 204

4250 Flow Meter
Section 5 Maintenance and Service
5-4
CAUTION
There have been reports of irritating fumes coming from the
desiccant during regeneration. While our attempts to duplicate
the problem have been unsuccessful, we still urge you to use
caution.
• Use a vented oven in a well-ventilated room.
• Do not remain in the room while the regeneration is
taking place.
To regenerate the desiccant cartridge:
1. Carefully snap it out of its bracket.
2. Pull the silicone tubing from the end of the cartridge.
3. Remove one of the end caps from the cartridge by twisting
and pour the saturated desiccant into a metal, ceramic, or
other heat-resistant container.
4. Identify the desiccant and heat it at the proper tempera-
ture two to three hours, or until the blue or yellow color
returns.
5. Do not try to regenerate the desiccant inside the cartridge;
the cartridge is plastic and will melt.
6. Refill the cartridge with the regenerated desiccant (or with
the extra desiccant provided in the accessory package.
7. Replace the end caps.
Notice the foam filters in the end caps; they keep small pieces of
the desiccant material from falling out of the cartridge. You can
clean these filters from time to time using ordinary dish soap and
water, then allow to dry.
Note
Regeneration of the desiccators is extremely important.
Saturated desiccators let the flow meter draw moisture inside,
exposing both mechanical and electronic components to water
and/or chemical contamination. The air in many installations
contains fumes that will form acids in the presence of moisture.
These acids may corrode electrical components, particularly
connectors and circuit boards.
Moisture drawn into the area-velocity probe’s reference port
vent tube will disable the probe.
Unseen damage caused by moisture will eventually ruin the
flow meter. For maximum equipment life and reliability, inspect
the desiccators regularly and regenerate them when neces-
sary.