Maintenance And Fault Rectification; Maintenance; Remove Interferences - bürkert LEVEL SWITCH 8112 Bedienungsanleitung

Reaction when malfunc-
tions occur
Failure reasons
Fault rectification
Checking the switching
signal
LEVEL SWITCH 8112 • with transistor output
7 Maintenance and fault rectification

7.1 Maintenance

If the instrument is used properly, no special maintenance is required
in normal operation.

7.2 Remove interferences

The operator of the system is responsible for taking suitable measures
to rectify faults.
LEVEL SWITCH 8112 offers maximum reliability. 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.
Error
LEVEL SWITCH
8112
signals "covered"
without being submerged
(overfill protection)
LEVEL SWITCH
8112
signals "uncov-
ered" when being sub-
merged (dry run
protection)
7 Maintenance and fault rectification
Cause
Operating voltage too
low
Electronics defective
Unfavourable installa-
tion location
Rectification
Check operating voltage
Press the mode switch. If
the instrument then
changes the mode, the
vibrating element may be
covered with buildup or
mechanically damaged.
Should the switching
function in the correct
mode still be faulty, re-
turn the instrument for
repair.
Press the mode switch. If
the instrument then does
not change the mode,
the electronics module
may be defective. Ex-
change the electronics
module.
Mount the instrument at
a location in the vessel
where no dead zones or
air bubbles can form.
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