January 2019
KPM KB2 Man W41100099V1.8
25
5
Start-up
Tuning sensor position
Purpose of tuning is to direct light beam so that reflectance from paper is strongest.
To observe the signal levels:
1.
Go to "Maintenance" -
› "On
-line signals".
2.
Locate large piece of paper on the estimated place of measured sheet to simulate paper on
situation to find the maximum signal level. Paper distance has effect on the signal level.
3.
Rotate the sensor head until the signal levels indicated in the display unit are at their
strongest (normally from 50
–
500 with paper). This is usually the perpendicular position
against the web.
4.
Check the ambient light percentage ("Maintenance" -
› "On
-line signals"). This should be
below 60 % level. If the ambient light is too high, reduce the receiver sensitivity Rx Gain.
5.
Fasten the position memory ring.
Fig. 5.1. Sensor head light and position memory ring adjustment.
Reference values for Paper and Break
1.
Teach the unit to recognize the Break-ON conditions.
Press "SAMPLE". After a short time measured values are displayed. Save those numbers as
reference v
alues for break “S
ave as break lev
el”.
2.
Teach the unit to recognize the Paper-ON conditions. While Paper is on, press "SAMPLE".
After a short time measured values are displayed. Save those numbers as reference value
for paper “S
ave as Paper lev
el”.
Auto Limit = Configuring KPM KB2 for break detection
Auto-limit Calculation can be performed when above mentioned both reference values have
been stored in KPM KB2 memory. This procedure calculates detection limit for break detection.
1.
Go to "Configuration" -
›
"Auto-limit&Auto-alarm" -
›
"Calculate Auto-Limit". KPM KB2 has
calculated from the Paper ON / Break ON signals "Ratio" (Paper to Break) for all the light
components plus 7 calculated combinations thereof. The highest rated signal normally gives
the best performance.
2.
Select the 1st displayed signal for break detection with arrow right and "ENTER". KPM KB2
sets the break trigger level (Detection limit) to the mid-point (50 % value) between the
"Break"-on/"Paper"- on levels of the selected signal. KPM KB2 selects the detection
"Direction".
3.
Set "Configuration" -
›
(operating) "Mode: Detect enabled" to activate the break
measurement. In the "Maintenance" mode the break relay is deactivated to prevent false
alarms while working on the unit.
Auto Alarm
1.
Go to "Configuration" -
› "Auto
-limit&Auto-alarm" -
› "Calculate
Auto-Alarm".
2.
Choose a signal for alarming purposes. Only one base color R, G, B or IR (no combination)
can be chosen. Normally, the same signal should be taken for alarming than for the break
detection.
