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7.3
Direct calibration
Adjust each WI displacement transducer to the same span of the output signal.
This enables interchangeability when the measuring amplifiers are the same.
For very precise measurements, we recommend direct calibration using gage
blocks or templates with dimensions corresponding to the displacement,
movement or change in length that you wish to measure.
When there are cable extensions, the entire cable length should be included in
the calibration procedure.
More notes on calibration can be found in the appropriate operating manual for
the selected amplifier.
7.4
Measurement circle
The measurement circle means the sum of all the dimensions included in the
displacement measurement, that is, the dimensions of the
S transducer
S core or probe pin
S workpiece
S workpiece fastener
S transducer fastener
Temperature changes shift the zero signal of the inductive measurement
system by a small amount. Also the nominal output span of the transducer
changes with temperature (for max. temperature variations see chapter 11
"Specifications", page 21).
In most cases a temperature change results in the thermal expansion of
different materials in the measurement configuration itself. When high levels of
precision are required it is essential to take account of every thermal expansion
in the measurement circle. The specifications apply to clamping with the aid of
steel parts with a thermal expansion of 11 x 10
WI
A01028_05_Y00_01 HBM: public
/ °C.
-6
Mounting
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