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Control Menu, Set Sensor Parameter
optoNCDT 2300
7.4.5 Setting Zero and Masters
By zeroing and mastering you can set the measurement value to a set point in the measuring range. The output range is moved
thereby. This function makes sense, for example, for several adjacent measuring sensors or in the case of the thickness and planarity
measurement.
Master value in mm Value Data, for example of the thickness, of a master piece.
Value range max. – 2 x measuring range up to + 2 x measuring range
Setting masters is used to compensate mechanical tolerances in the measurement setup of the sensors or to adjust the temporal
(thermal) changes in the measurement system. The masters measurement, also a known as the calibration measurement, is given a
set point.
The value which is given during measurement on the sensor output of the “mastering object“ is the “master value”. The zero-setting is
a characteristic of the mastering, because here the master value is „0“.
100 %
x m
0 % Measuring range
643
32760
64876
Output characteristic
Output characteristic after mastering
When mastering the sensor‘s characteristic is parallel displaced. The displacement of the char-
acteristic curve reduces the usable measurement range of the sensor the further the master
value is away from the master position.
Sequence for mastering /Setting zero:
Bring target and sensor in the desired position together.
Send the master command.
The master command waits for 2 seconds on the next measurement value and masters it. If no
measurement value is received within this time, for example by external triggering, the com-
mand returns with the error “E32 Timeout“ back.
After the mastering, the sensor gives new measurement values, related to the master value.
The non-mastered condition applies by means of a reset with the button Reset master
value .
Fig. 36 Characteristic for mastering
i
“Setting masters“ or “Setting zero“ requires that a target is within the measurement range “Setting masters“ or “Setting zero“.
“Setting masters“ and “Setting zero“ has an influence on the digital outputs.
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