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B. Adjustment of the analogue output (if required):
No. Action Picture
follows
1. Set 4 mA point:
Q
Q
1
I
OK
C
FA
push
15x
2. Set 20 mA point:
Q
Q
1
I
OK
C
FA
push
16x
C. Examples of use
Differential thickness measurement with wide wooden boards
Two opposite facing sensors enable non-contact measurement and control of the thickness of the wood or wooden
boards. A change in thickness is indicated at the analogue output of the master. 12 mA corresponds with the taught
reference thickness of the object.
INFORMATION
Although a FT 50 RLA sensor only has a measuring range of 70, 100, or 220 mm respectively, it is
possible to measure excess width using master-slave mode. The solution is in the alignment of both
sensors (illustr. 20). The necessary measuring range depends on the maximum difference in thickness.
For slight differences in thickness and little fluctuation in feed position, sensors with a small measuring
range can be selected.
Slave
The analogue output on the master sensor supplies information on thickness.
INFORMATION
To achieve optimum use of the measuring range, the object must be positioned in the centre of
the measuring range.
Parallel differential measurement:
Object detection (or measurement) with a fluctuating distance.
The distance between the object and sensor often fluctuates. Reliable detection is thus not possible with a back-
ground sensor. Using two FT 50 RLA 70 / 100 / 220 sensors and parallel differential measurement mode (func-
tion no. 27), reliable object detection can be achieved via the analogue output of the master or through the teach-in
of switch thresholds on the master (function no. 2 and 3).
60
Action
Select function n° 16 (set 4 mA point). Position
2
object at desired 4 mA point. Push
Select function n°17 (set 20 mA point). Position
2
object at desired 20 mA point. Push
Nominal dimension
Reaction
Once the
.
SET
the current measured value corre-
sponds with the 4 mA point of the
analogue output.
Once the
.
SET
the current measured value corre-
sponds with the 20 mA point of the
analogue output.
Master
Control
FT 50 RLA Disctance sensor - GB - 068-13671 - 19.05.2016-12
Mounting and
operating instructions
SET
key has been activated,
SET
key has been activated,
Illustr. 22
15500280
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