Dynasonics 902_903 Series Portable Doppler Ultrasonic Flow Meter - Manual (Page 21)

Rev. 10/08
- 19 - D902/3
The D902/3 is equipped with a DESICCANT CARTRIDGE,
which is located in the face plate of the meter. The
purpose of the cartridge is to absorb the humidity that was
present inside of the enclosure when the product was
manufactured and to absorb moisture that may seep into
the enclosure during field operation. Observing the color
indicator of the DESICCANT CARTRIDGE and replacing it
when it turns PINK will decrease the chance of corrosion
and resulting failure of the internal components of the
D902/3.
Procedure:
1. Obtain a new DESICCANT CARTRIDGE from
Dynasonics (Dynasonics P.N. D005-9909-001).
2. Replace the cartridge in a temperature and humidity
controlled environment. Allow the meter to reach the
same ambient temperature as the area in which the
cartridge will be replaced. (Do not attempt to change
the cartridge if the meter is below the Dew Point
Temperature.)
3. Remove the old cartridge with a 1-3/8" open-end
wrench or appropriate adjustable wrench.
4. Insert the new cartridge and tighten with the wrench.
5. Discard the used cartridge.
Desiccant Cartridge
PART 2 - SERVICE AND MAINTENANCE