705-5100-121 Datasheet, PDF (40/56 Pages) Magnetrol International, Inc. – GuidedWave Radar Level Transmitter

7.0 Reference Information
WARNING!
Explosion hazard. Do not connect or
disconnect equipment unless power
has been switched off or the area is
known to be non-hazardous.
7.1 Troubleshooting
The Eclipse transmitter is designed and engineered for
trouble-free operation over a wide range of operating
conditions. Common transmitter problems are discussed
in terms of their symptoms and recommended corrective
actions. Information on how to handle material buildup
on the probe is also provided in this section.
7.1.1 Troubleshooting System Problems
Symptom
LEVEL and AI OUTPUT values
are inaccurate.
LEVEL readings are repeatable but
consistently high or low from actual
by a fixed amount.
LEVEL and AI OUTPUT values
fluctuate.
Problem
Solution
Basic configuration data is
questionable.
Reconfigure the Probe Model and/or Probe
Mount, Probe Length or Level Offset.
1) Ensure the Level is accurate.
2) Verify EU_0% and EU_100% values.
Interface level has significant emulsion. Examine process to reduce/eliminate
emulsion layer.
Configuration data does not
accurately match probe length
or tank height.
Ensure proper Probe Model and probe length.
Adjust trim level value by the amount of
noted inaccuracy.
Turbulence
Increase the AI Block process value filter
time until the readings stabilize.
LEVEL and AI OUTPUT values
all reading low vs. actual.
Level Reading on Display is stuck at
full scale.
LEVEL and AI OUTPUT values
values all at maximum level.
LEVEL and AI OUTPUT values
reading high vs. actual.
LEVEL value reading high when
should be zero.
High Frequency connection
Check Fid Spread (should be stable within
±10 counts).
Lower dielectric material over higher Select Fixed Threshold option.
dielectric material, e.g., oil over water
Coating, clumping or buildup on probe These may be expected inaccuracies due
to affect on pulse propagation.
Dense, water based foam
These may be expected inaccuracies due
to affect on pulse propagation.
Software believes probe is flooded
(level near very top of probe).
Check actual level. If probe is not flooded,
Check for buildup or obstructions near top
of probe. Select higher dielectric range.
Check for condensation in probe
connection. Add Blocking Distance.
Possible configuration issue
with single rod probe
1) Increase Blocking Distance
2) Increase Dielectric Range
Possible obstruction in tank
affecting single rod probe
1) Increase Dielectric Range until
obstruction is ignored
2) Relocate probe away from obstruction
Transmitter loose or disconnected
from probe
Ensure transmitter connected securely
to probe.
NOTE: When consulting the factory concerning improper operation, use proper tables on Pages 54-55. Enter all data when transmitter
is working CORRECTLY or INCORRECTLY.
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57-640 Eclipse Guided Wave Radar Transmitter - FOUNDATION fieldbus^™