January 2019
KPM KB2 Man W41100099V1.8
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Alarm settings:
KPM KB2 can alarm in situations, where the signal level is very low (signal below Low alarm limit),
very high (signal above High alarm limit) or when signal drifts a lot.
Drift alarm limit and Drift alarm direction (falling/rising) can be determined. Ambient light is
normally always: In use.
Fig. 4.7. Alarm settings.
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Observed signal:
Select the R, G or B signal (IR in case of IR light source) which is used to
monitor this alarm. Normally the same signal is chosen into alarm as in break detection. Only
one main color can be chosen for alarming, no combination possible.
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Low/High alarm limit:
If a piece of paper gets stuck on the sensor head, signal level can go
very low or very high. The low and high alarm limits are set for this case.
Alarm will go on, if the signal goes below low limit (default value 3) or over high limit
(default value 1000). Normally default values are OK.
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Drift Alr:
Drift alarm is used to give alarm in case measurement signal drifts. For example
because of dust or dirt on top of fiber optic lens or in the opening (makes it smaller).
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There are three possibilities to use "Drift Alarm":
▪
Report only:
In case drift is detected; Alarm Relay is activated, break detection and
Break Relay continue to operate normally.
▪
Not in use:
Drift detection is not used.
▪
Prev. break:
In case of drift is detected; Alarm Relay is activated, break detection and
Break
Relay is not used (purpose is that KPM KB2 will never give false Break output).
R (G, B) Break on and R (G, B) Paper, in the bottom of display. These are stored signal values
during Break and Paper. Auto limit calculation is using these values to perform detection
limit and other values.
These are only for indication in this menu to help select correct alarm limits.