SYMPTOM CAUSE ACTION
Measurement Consis-
tently Off By Constant
Amount
measurement offset - refer to P-60 & 62 & e.g. 4
Reading Error Progres-
sively Worsens With
Distance
temp. compensation - insure that J2 is properly set,
refer to fig. 2
sound velocity compen-
sation
- P-61 & 63, e.g. 4
Screen Blank, Neon L1
Not Flashing
loss of power - check power wiring jumpers &
fuse. Refer to fig. 2.
Screen Will Not Re-
spond To Programmer
programmer improperly
positioned
- refer to installation page 3 — 1
infra-red window ob-
structed
-clean
calibrator defective - test programmer P-95
Reading Erratic echo confidence weak - refer to P-85, 86, 87 & 88
liquid surface agitated - increase damping, P-68 & 69
turn on fuzz filter P-72
material filling - relocate transducer
increase damping, P-68 & 69
electrical noise - check P-84 under quiescent
conditions, noise should be un-
der 15 dB.
- transducer cable must be in
grounded metal conduit and
cable grounded only at TB-1.
Refer to fig. 4.
- increase damping, P-68 & 69
agitator blades - set P-73 to 1
Reading ’EEEE’ reading to large - re-calibrate, i.e. P-3, 4, 37, 52
& 53
PL-399 8 — 6
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