5-1
4210 Flow Meter
Section 5 Maintenance and Service
This section of the 4210 instruction manual provides detailed
instructions on the care and routine maintenance necessary to
keep the flow meter in top operating condition. Included are sec-
tions on cleaning the flow meter, reactivating the desiccator,
maintaining the ultrasonic level sensor, and servicing the
internal printer.
Isco strongly recommends that you become familiar with the
maintenance procedures presented here. While the 4210 is rug-
gedly built to withstand severe field conditions, it will function
best and remain most reliable if these simple procedures are
learned and followed.
5.1 Routine Maintenance
5.1.1 Care of the Flow Meter
Case
If the lid is tightly latched, and all the M/S connectors on the side
of the case are tightly capped, you can clean the case by spraying
it with a hose or washing it with soapy water. Do not use a hose
with a nozzle or a high pressure hose-and-wand such as is found
at car washes. Do not immerse the flow meter in a tank of water
to wash it. While designed to withstand accidental submersion in
water, if that should occur, the flow meter is not intended for
routine submersion.
5.1.2 Care of the Case Seal Periodically inspect the case seal and clean it, if necessary. The
ridge extending around the edge of the back half of the flow
meter cabinet forms a seal with the groove in the cabinet door. It
should be free of dirt, sand, etc. If it isn't, the case may not seal
completely when closed. Clean it carefully with a damp cloth.
The rubber gasket in the lid should also be clean; if not, clean it
with a small brush and a damp cloth.
If you do any cleaning while the case is open, be careful not to
allow any dirt or debris to fall inside the flow meter case; it is
best to work on the flow meter with the case standing upright. If
the seals are not properly maintained, they may leak, causing
damage and eventual failure of the components inside.
5.1.3 Preventing Moisture
Damage
To prevent moisture damage to internal components, keep the lid
tightly latched at all times, except when you need to access the
front panel to change the program or the paper roll. Do not run
the flow meter with the case open as a matter of routine. If you
do, you will expose the internal components to dirt and moisture;
you will also cause the case desiccant canister to prematurely
saturate. Inspect the desiccant canister periodically and recharge
it as necessary.
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