Rectify Faults - Siemens SITRANS LG250 Operating Instructions Manual
Guided wave radar, foundation fieldbus coax probe
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Also See for SITRANS LG250:
- Operating instructions manual (92 pages) ,
- Operating instructions manual (76 pages) ,
- Operating instructions manual (92 pages)
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Reaction when malfunc-
tions occur
Procedure for fault recti-
fication
Treatment of measure-
ment errors
PBD-51041056
Code
Cause
Text mes-
sage
M504
– Hardware defect
Error on an
device inter-
face
M505
– Sensor does not detect an
echo during operation
no measured
value avail-
able
– Process component or
probe contaminated or
defective
M506
– Error during setup
Installation/
Setup error
M507
– Error during setup
– Error when carrying out a
Error in the
reset
instrument
settings
– False signal suppression
faulty
9.4
Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The first measures are:
•
Evaluation of fault messages, for example via the display and
adjustment module
•
Checking the output signal
•
Treatment of measurement errors
Further comprehensive diagnostics options are available with a PC
with PACTware and the suitable DTM. In many cases, the reasons can
be determined in this way and faults rectified.
The below tables show typical examples for application-relevant
measurement errors. There are two measurement errors:
•
Constant level
•
Filling
•
Emptying
The images in column "Error pattern" show the real level with a bro-
ken line and the level displayed by the sensor as a continuous line.
SITRANS LG250 - Operating Instructions
Rectification
– Exchanging the electronics
– Send instrument for repair
– Check and correct instal-
lation and/or parameter
adjustment
– Clean or exchange process
component or probe
– Check and correct instal-
lation and/or parameter
adjustment
– Check probe length
– Carry out reset and repeat
setup
57
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