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MODEL100 REV D.wpd
4.3 SPARE PARTS
There are no normally recommended spare parts to stock. The transducer and electronics are a matched
set and therefore are not interchangeable with others. Should a spare be needed, a complete unit should
be ordered and stocked. For AC powered units, the spare fuse is a ½A, fast acting fuse. Replace fuse
with Wickmann part number 3730500041 or equivalent. For units powered by 24 Vdc, the fuse is a 1A
slow blow fuse. Replace with Wickmann part number 3741100041.
4.4 TROUBLE SHOOTING
TABLE I. TROUBLE SHOOTING GUIDE
OBSERVATION
PROBABL E CAUSE
REMEDY
Output continually drifting
downward with constant
flow.
1.
Coating forming on wetted
surface o f transducer.
1.
Clean transducer periodically or
adju st calibration (cal)
potentiometer until layer build-
up stabilizes.
Output saturates high or
low — will not resp ond to
flow change.
1.
Loose tra nsducer cable
connections.
2.
Flow rate not yet within range
of me ter.
3.
Meter/Calib switch in wrong
position.
4.
Transducer cable damaged.
5.
Bad elec tronic com pon ent.
6.
Blown fuse.
1.
Securely connect transducer
cable.
2.
Check flow.
3.
Check Meter/C alib sw itch is in
"meter" position.
4.
Check cable continuity.
5.
Perform transducer and
electronics functional test (see
SE CT ION 3.5). W rite resu lts
down and consult factory.
6.
Replace fuse as needed.
Output varies with flow
but not stable.
1.
Fluid temperature not stable.
2.
Fluid m ixture not prop erly
blended.
3.
Gas mixed with liquid.
4.
Flow not fully developed.
1.
Tun e temp erature controller,
add insulation and/or ad d static
mixer in front of tran sducer.
2.
Add static mixer in front of
transdu cer.
3.
Reduce gas pressure or check
for air ingress on suction side of
pump. Refer to Installation
Section.
4.
Check inlet and outlet for
proper straight line length &
freedom from obstructions.