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Siemens SITRANS LVL200E 取扱説明書
Reaction when malfunc-
tion occurs
Causes of malfunction
Fault rectification
Checking the switching
signal
Error
SITRANS LVL200E sig-
nals "covered" without
being submerged (overfill
protection)
SITRANS LVL200E sig-
nals "uncovered" when
being submerged (dry run
protection)
Control lamp off
30
7 Maintenance and fault rectification
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 offers maximum reliability. Nevertheless, faults
can occur during operation. These may be caused by the following,
e.g.:
•
Sensor
•
Process
•
Voltage supply
•
Signal processing
The first measure to take is to check the output signal. In many cases,
the causes can be determined this way and the faults quickly rectified.
Reason
Operating voltage too low
Electronics defective
Unfavourable installation
location
Buildup on the vibrating el-
ement
Wrong mode selected
Error on the vibrating el-
ement
Interference on the elec-
tronics module
instrument defective
SITRANS LVL200E - Operating Instructions
Rectification
Check operating voltage
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.
Mount the instrument at a location in the vessel where
no dead zones or air bubbles can form.
Check the vibrating element and the sensor for buildup
and remove the buildup if there is any.
Set the correct mode on the signal conditioning instru-
ment (overflow protection, dry run protection). Wiring
should be carried out according to the idle current prin-
ciple.
Check if the vibrating element is damaged or extreme-
ly corroded.
Exchanging the electronics module
Exchange the instrument or send it in for repair
MAN-100411