Siemens SITRANS LVL100 Betriebsanleitung - Seite 20
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Maintenance and fault rectification
Reaction when malfunc-
tions occur
Causes of malfunction
Fault rectification
Checking the switching
signal
Reaction after fault rec-
tification
20
7 Maintenance and fault rectification
7.1 Maintenance
When used in the correct way, no special maintenance is
required in normal operation.
7.2 Remove interferences
The operator of the system is responsible for taken suitable
measures to remove interferences.
A maximum of reliability is ensured. Nevertheless, faults can
occur during operation. These may be caused by the following,
e.g.:
Sensor
l
Process
l
Voltage supply
l
Signal processing
l
The first measure to be taken is to check the output signal. In
many cases, the causes can be determined this way and the
faults rectified.
? Control lamps off
Voltage supply interrupted.
l
à Check the voltage supply and the cable connection
à Exchange the electronics module
? Signal lamp flashes red
There was no load connected when connecting to
l
power supply
à Connect the instrument correctly
à Check if the tuning fork is damage or extremely
corroded
? The signal lamp flashes alternately red and green
Shortcircuit or overload
l
à Check the electrical connection
Depending on the failure reason and measures taken, the
steps described in chapter "Set up" must be carried out again,
if necessary.
SITRANS LVL100 l CONTACTLESS ELECTRONIC SWITCH