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7 Maintenance and fault rectification
OPTISWITCH 4000 C • Transistor (PNP)
42372-EN-191122
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.
Error
Cause
Rectification
Green signal
lamp off
Voltage supply in-
terrupted.
Check the voltage supply and the ca-
ble connection
Electronics de-
fective
Exchange the instrument or send it in
for repair
Red signal lamp
lights (switching
output high-im-
pedance)
Error with the
electrical con-
nection
Connect the instrument according to
the wiring plan
Shortcircuit or
overload
Check the electrical connection
Red signal lamp
flashes (switching
output high-im-
pedance)
Vibrating fre-
quency out of
specification
Check the vibrating element on build-
up and remove it
Buildup on the vi-
brating element
Check the vibrating element and
the sensor if there is buildup and re-
move it
Vibrating element
damaged
Check if the vibrating element is dam-
age or extremely corroded
Maintenance
Cleaning
Reaction when malfunc-
tion occurs
Causes of malfunction
Fault rectification
Checking the switching
signal
