IFM Electronic 150 KNM Bedienungsanleitung Seite 10

Empty adjustment
The unit must be adjusted after installation in the empty tank (empty
adjustment). The tank can be considered to be "empty" when the
medium to be detected is min. 20 mm away from the active zone. If
the sensor detects a medium after adjustment, its switching status
changes.
Note:
The sensor is operational just with empty adjustment. However, it is
recommended to carry out a "full adjustment" with the active zone
being completely covered after empty adjustment. On the basis of the
values for the empty state/full state the internal microprocessor deter-
mines the optimum position of the switching thresholds between the
two states. Using both adjustment criteria (empty and full adjustment)
results in the maximum operational reliability for the application. For
empty adjustment the internal microprocessor generates 2 values.
The first value corresponds to the sensor signal measured in the empty
state. The second value is an assumed measured value for the full
state. It is calculated from the just measured empty state and a facto-
ry signal preset. For full adjustment this second value is replaced by a
real measured value.
10
All manuals and user guides at all-guides.com
Press the programming pushbutton until the
1 ... 5 s
green LED flashes (for min.1 s and max. 5 s; unit
is in the adjustment mode).
For the normally open version all LEDs are off
after adjustment. For the normally closed version
the yellow LED lights.