Operation Troubleshooting - Siemens SITRANS LR250 Operating Instructions Manual
Radar transmitters profibus pa
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Also See for SITRANS LR250:
- Operating instructions manual (294 pages) ,
- Quick start manual (272 pages) ,
- Instruction manual (175 pages)
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Diagnosing and troubleshooting
10.4 Operation troubleshooting
10.4
Operation troubleshooting
Operating symptoms, probable causes, and resolutions.
Symptom
Display shows
Display shows
Display shows
Display shows
Reading does not
change, but the level
does
Measurement is
consistently off by a
constant amount
Screen blank
176
Cause
level or target is out of range
material build-up on antenna
location or aiming:
poor installation
•
flange not level
•
Auto False Echo Suppression
•
may be incorrectly applied
antenna malfunction:
temperature too high
•
physical damage
•
excessive foam
•
multiple echoes
•
SITRANS LR250 processing
wrong echo, for example, vessel
wall, or structural member
setting for Low Calibration
•
Point (2.3.7.1.) not correct
setting for Sensor Offset
•
(2.3.7.3.) not correct
power error
too much load resistance
Action
check specifications
•
check Low Calibration Pt. (1.6.)
•
increase Confidence (2.5.9.1.)
•
clean the antenna
•
re-locate SITRANS LR250
•
check to ensure nozzle is vertical
•
ensure end of antenna protrudes from end of nozzle
•
review Auto False Echo Suppression (Page 236)
•
ensure Auto False Echo Suppression Range is set
•
correctly
check temperature in Maximum Value (3.3.2.)
•
use foam deflector or stillpipe
•
relocate
•
use a defoamer
•
set Algorithm (2.5.7.1.) to tF (trueFirst echo)
•
re-locate SITRANS LR250
•
check nozzle for internal burrs or welds
•
rotate device 90°
•
use Auto False Echo Suppression (2.5.10.1.)
•
if necessary: see Auto False Echo Suppression
•
(Page 236)
check distance from sensor reference point to Low
•
Calibration Point (2.3.7.1.)
check Sensor Offset (2.3.7.3.)
•
check nameplate rating against voltage supply
•
check power wiring or source
•
change barrier type, or
•
remove something from the loop, or
•
increase supply voltage
•
reduce wire distance or use larger gage wire
•
Operating Instructions, 08/2014, A5E32221386-AC
SITRANS LR250 (PROFIBUS PA)
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Table of Contents
Troubleshooting
