Siemens SITRANS LVL200E - Maintenance and Fault Rectification; Fault Rectification Procedures

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MAN-100411SITRANS LVL200E - Operating Instructions
55328-EN-170712
7 Maintenanceandfaultrectication
7.1 Maintenance
If the device is used properly, no special maintenance is required in
normal operation.
7.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
SITRANSLVL200Eoersmaximumreliability.Nevertheless,faults
can occur during operation. These may be caused by the following,
e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
Therstmeasuretotakeistochecktheoutputsignal.Inmanycases,
thecausescanbedeterminedthiswayandthefaultsquicklyrectied.
Error Reason Rectication
SITRANS LVL200E sig-
nals "covered" without
beingsubmerged(overll
protection)
SITRANS LVL200E sig-
nals "uncovered" when
being submerged (dry run
protection)
Operating voltage too low Check operating voltage
Electronics defective Press the mode switch on the signal conditioning in-
strument. If the instrument then changes the mode, the
vibrating element may be covered with buildup or me-
chanically damaged. Should the switching function in
the correct mode still be faulty, return the instrument
for repair.
Press the mode switch on the signal conditioning in-
strument. If the instrument then does not change the
mode, the electronics module is defective. Exchange
the electronics module.
Unfavourable installation
location
Mount the instrument at a location in the vessel where
nodeadzonesorairbubblescanform.
Buildup on the vibrating el-
ement
Check the vibrating element and the sensor for buildup
and remove the buildup if there is any.
Wrong mode selected Set the correct mode on the signal conditioning instru-
ment(overowprotection,dryrunprotection).Wiring
should be carried out according to the idle current prin-
ciple.
Controllampo Error on the vibrating el-
ement
Check if the vibrating element is damaged or extreme-
ly corroded.
Interference on the elec-
tronics module
Exchanging the electronics module
instrument defective Exchange the instrument or send it in for repair
Reaction when malfunc-
tion occurs
Causes of malfunction
Faultrectication
Checking the switching
signal