Instruction Manual

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 contactless electronic switch
Maintenance and fault rectification
31762-EN-060830