Omron ZX Series Operation Manual page 70

Reflective Sensor Heads: FUN M ode Functions
n Measuring Thicknesses of Sensing Objects: One-point Scaling C
The thickness of a sensing object can be measured by using two-sensor
operation and one-point scaling (and inverting display values). Perform the
two-sensor operation A+B to display the sum of the measured values for
two Sensor Heads. Settings are made on the 2CH Amplifier Unit.
Next, set the actual sensing object and set the value to be displayed in the
scaling mode. Then, set to enable inverting the display values so that
smaller values are displayed when larger values are measured (i.e., when
thinner sensing objects are measured). Two-point scaling can be also used
if both sensing object thicknesses are known.
Sensor Head
1CH
Sensing object
Sensor Head
2CH
Measured value = Display value
150.0
160.0
170.0
160 mm is displayed as 50 mm and
the display values are inverted.
Display value
(mm)
160.0
50.0
50
Refer to 3-5-6 Two-sensor Operation.
Sensing object thickness is required.
B
Thickness
A
Display value
60.0
50.0
40.0
Actual values measured
The larger the measured value is, the smaller the
displayed thickness value (display value) is.
160.0
Actual value measured (mm)
Example: One-point Scaling C
First connect two Amplifier Units
to perform the A + B operation.
1CH
2CH
Measured value
Current measured value A +
150.0
Measured value B = 160 mm
160.0
Sensing object thickness = 50 mm
170.0
: Scaling value input
All display values are offset
and inverted.
Display values
Section 3-5
Calculating
Unit
A + B