Orion Instruments Eclipse 705 - Manual (Page 43)

43 57-600 Eclipse ® Guided Wave Radar Transmitter
LEVEL, % OUTPUT and LOOP values Basic configuration data is Reconfigure the Probe Model and/or Probe
are all inaccurate. questionable. Mount, Probe Length or Level Offset.
1) Ensure the Level is accurate.
2) Verify 4 mA and 20 mA Loop values.
Interface level has significant emulsion. Examine process to reduce/eliminate
emulsion layer.
LEVEL readings are repeatable but Configuration data does not Ensure proper Probe Model and probe length.
consistently high or low from actual accurately match probe length
by a fixed amount. or tank height. Adjust trim level value by the amount of
noted inaccuracy.
LEVEL, % OUTPUT and LOOP Turbulence Increase the Damping factor until the
values fluctuate. readings stabilize.
High Frequency connection Check Fid Spread (should be stable within
±10 counts).
LEVEL, % OUTPUT and LOOP Lower dielectric material over higher Select Fixed Threshold option.
values all reading low vs. actual. 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.
LEVEL reading on Display is correct Basic configuration data is Set POLL ADR to 0 if not using
but LOOP is stuck on 4 mA. questionable. HART multi-drop.
HART device only: handheld will only Most current Device Descriptors Contact local HART service center for the
read Universal Commands. (DDs) are not installed in handheld. latest DDs.
Level Reading on Display is stuck at Software believes probe is flooded Check actual level. If probe is not flooded,
full scale, loop is stuck at 20.5 mA. (level near very top of probe). Check for buildup or obstructions near top
of probe. Select higher dielectric range.
Check for condensation in probe
connection. Add Blocking Distance.
LEVEL, % OUTPUT and LOOP Possible configuration issue 1) Increase Blocking Distance
values all at maximum level. with single rod probe 2) Increase Dielectric Range
LEVEL, % OUTPUT and LOOP Possible obstruction in tank 1) Increase Dielectric Range until
values all reading high vs. actual. affecting single rod probe obstruction is ignored
2) Relocate probe away from obstruction
LEVEL value reading high when Transmitter loose or disconnected Ensure transmitter connected securely
should be zero. from probe to probe.
Symptom Problem Solution
3.3.1 Troubleshooting System Problems — Model 705
NOTE: When consulting the factory concerning improper operation, use proper tables on Pages 66-67. Enter all data when transmitter
is working CORRECTLY or INCORRECTLY.
3.3 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.
WARNING! Explosion hazard. Do not connect or disconnect equip-
ment unless power has been switched off or the area is
known to be non-hazardous.