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Through-beam Sensor Heads: FUN M ode Functions
n Correcting Display Values to Match Actual Width: Two-point Scaling A
Display values can be corrected if there is a discrepancy between the actual
incident beam width and the value displayed on the Amplifier Unit. When
actual widths are known, they are input at two points to correct the range and
offset of display values (see following figure).
Sensor Head Emitter
Sensor Head Emitter
Actual incident beam width
Measured value = Display value
2.0
2.5
3.0
3.5
4.0
There are discrepencies
between actual incident beam
width and display values.
To change only the offset without changing the range of display
values, refer to n Offsetting Display Values: One-point
Scaling A.
Sensing object 1
Sensing object 2
2.20
2.55
2.90
3.25
3.60
Example: Two-point Scaling A
Sensor Head Receiver
Despite the actual 2.0-mm incident
beam width, 2.2 mm is displayed.
Sensor Head Receiver
In addition, despite the actual 4.0-mm
incident beam width, 3.6 mm is displayed.
: Scaling value inputs
Actual incident beam width
Display value
2.0
2.5
3.0
3.5
4.0
Section 3-8
Measured value
2.0
2.20
2.5
2.55
3.0
2.90
3.5
3.25
4.0
3.60
83
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