KROHNE OPTISWITCH 4000C Transistor EN - Manual (Page 20)

7 Maintenance and fault rectification
7.1 Maintenance
When used as directed in normal operation, OPTISWITCH
4000 C is completely maintenance free.
7.2 Rectify faults
OPTISWITCH 4000 C offers maximum reliability. Nevertheless
faults can occur during operation. These may be caused by the
following, e.g.:
l
Sensor
l
Process
l
Power supply
l
Signal processing
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
l Voltage supply interrupted.
à
Check the voltage supply and the cable connection
à
Exchange the electronics module
?
Signal lamp flashes red
l There was no load connected when connecting to
power supply
à
Connect the instrument correctly
à
Check if the tuning fork is damage or extremely
corroded
l Frequency error
à
Adjust the instrument correctly
?
The signal lamp flashes alternately red and green
l Shortcircuit or overload
à
Check the electrical connection
Causes of malfunction
Fault rectification
Checking the switching signal
20 OPTISWITCH 4000 C - with transistor output
Maintenance and fault rectification
31763
-EN
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