January 2019
KPM KB2 Man W41100099V1.8
27
6
Maintenance
Regular maintenance
KPM KB2 does not require any regular maintenance. Built-in self-diagnostics monitors internal
signals and raises alarm flag in case of a malfunction or certain signals reach alarm limits.
Alarms
Alarm name
Possible cause
Action
Check cleaning
Sensor eyelet holes blocked.
Fiber optic cable in the
sensor getting dirty.
A LED of the RGB light
source has failed or loses the
intensity.
Check that the sensor head is free of debris.
Check that the purge air is on and flow s out from the
sensor eyelet holes (pressure 0.5 - 3 bar).
Clean the ends of the fiber optic cables using e.g. cotton
stick wetted with alcohol containing cleaning agent.
Check the signal levels of all light components. If the one
which is used f or break detection show s low intensity
select another signal (Configuration -> auto
limit calculation -> signal selection).
Ambient light too high
(on-line signals, ambient
light 60%)
Sensor head too close to the
web surface.
A shiny surf ace close to the
sensor head.
A strong light beam from a
nearby lamp aimed at the
sensor head.
Reflection from the web surf
ace still too high.
Move the sensor further away from the web or redirect the
sensor eyelet holes slightly slantwise at the surface.
Redirect the sensor to avoid the disturbing reflection.
Move the disturbing light or redirect the sensor away from
the light.
Reduce the Rx (light receiver) gain in the
"Measurement config" menu (Available gains 0.5, 1.0,
1.5, 2.0, 2.5, 3.0, 3.5, 4.0).
Optic data timeout
Communication between the
display and connection
board has jammed.
The flat cable connector in
the connection board is
loose.
Measuring Board failure.
Turn off the power and restart the unit.
Check that the flat cable connector is tight.
Replace the measuring board.
Signal out of range, clean
meas. probe
Piece of paper on the sensor
head.
Check the sensor head.
The R, G or B signal (or IR if in use) is used to monitor the light intensity drift. Gradual drift can
be caused e.g. by dust, which is slowly building up on the fiber optics or by dirty water, which
gets inside the sensor head and stains the surface of the fiber optics.