Troubleshooting
9.4 Operation troubleshooting
SITRANS Probe LR with mA/HART
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Operating Instructions, 05/2019, A5E32337711-AC
9.4
Operation troubleshooting
Symptom
Cause
Action
Display flashes LOE
and status symbol
shows
level or target is out of range
•
check specifications
•
check P006
•
increase range extension P805
Display flashes LOE
and status symbol
shows
material build-up on antenna
•
clean antenna
•
re-locate SITRANS Probe LR
Display flashes LOE
and status symbol
shows
location or aiming:
•
poor installation
•
flange not level
•
check to ensure nozzle is vertical
•
Use P837/P838
•
check to ensure nozzle is clean and free
of internal seams/welds
Display flashes LOE
and status symbol
shows
antenna malfunction:
•
temperature too high
•
physical damage
•
excessive foam
•
multiple echoes
•
check P343
•
use foam deflector or stilling well
•
relocate
•
use a defoamer
•
set P820 to 12 (First echo)
Reading does not
change, but the level
does
SITRANS Probe LR pro-
cessing wrong echo, i.e. ves-
sel wall, or structural member
•
re-locate SITRANS Probe LR
•
check nozzle for internal burrs or welds
•
rotate instrument 90°
•
use P837/P838
Level reading on Dis-
play is correct but
Loop is stuck on 4 mA
Basic configuration data is
questionable
•
set POLL ADR to 0 if not using HART
multi-drop
Measurement is con-
sistently off by a con-
stant amount
P006 not correct
P652 not correct
•
check distance from reference point to
zero level (P006)
•
check offset value (P652)
Screen blank
power error
•
check nameplate rating against voltage
supply
•
check power wiring or source