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Maintenance
Cleaning
Reaction when malfunc-
tion occurs
Causes of malfunction
Fault rectification
Checking the switching
signal
Error
OPTISWITCH 5300 C
signals "covered" without
being submerged (over-
flow protection)
OPTISWITCH 5300 C
signals "uncovered" when
being submerged (dry run
protection)
OPTISWITCH 5300 C • Two-wire 8/16 mA
7 Maintenance and fault rectification
7.1
Maintenance
If the device is used properly, no special maintenance is required in
normal operation.
The cleaning helps that the type label and markings on the instrument
are visible.
Take note of the following:
•
Use only cleaning agents which do not corrode the housings, type
label and seals
•
Use only cleaning methods corresponding to the housing protec-
tion rating
7.2
Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
The device 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.
Cause
Operating voltage too low
Electronics defective
Unfavourable installation
location
Buildup on the vibrating el-
ement
Wrong mode selected
7 Maintenance and fault rectification
Rectification
Check operating voltage
Press the mode switch on the controller. If the instru-
ment 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, return the instrument for repair.
Press the mode switch on the controller. If the instru-
ment 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 controller (overflow protec-
tion, dry run protection). Wiring should be carried out
according to the idle current principle.
33
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