4210 Flow Meter
Section 5 Maintenance and Service
5-3
Figure 5-1 Location of the Internal Desiccant Canister
CAUTION
Do not allow the flow meter to operate with a saturated desic-
cant canister. 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.
5.1.5 Care of the Ultrasonic
Level Sensor
The ultrasonic level sensor requires little maintenance. It is
encapsulated for protection from the environment. The level
sensor's transducer is encapsulated behind the rubber potting
material. Do not drop the assembly, nor attempt to take it apart.
The ultrasonic level sensor contains no user-serviceable parts. If
the transducer's surface becomes contaminated due to long-term
use or accidental submersion, operation of the unit may be
impaired. If this happens, clean the unit. Clean the case with a
brush. Clean the surface of the transducer with a gently flowing
stream of water.
5.1.6 Cable Inspection Inspect the cables connecting the ultrasonic level sensor to the
flow meter periodically for deterioration caused by abuse or
exposure to the elements. Damaged cables threaten the oper-
ation of the ultrasonic level sensor; replace them. Keep con-
nectors clean and dry. In permanent installations, always install
cables so they are not at risk of damage resulting from other
activity taking place in the area.
Cables repeatedly subjected to physical abuse will fail and
should be installed in conduit for protection. In temporary instal-
lations, avoid running cables where they may trip someone or be
run over by heavy equipment.
To Next Page
Loading...
