Calibration; Coarse Adjustment Using Marking Rings On The Plunger; Direct Calibration - HBM WA Series Mounting Instructions

Balancing
Transducer and plunger are assigned to each other by an ID; this prevents
interchanging. Plungers and coil systems that have not been matched to each
other can cause measurement errors of > 1%.
5.2

Calibration

5.2.1

Coarse adjustment using marking rings on the plunger

By using the marking rings on the plunger, you can calibrate at an accuracy of
±1mm (not to be recommended for measurement "längen" ≤10mm). The
nominal displacement is derived by inserting the plunger as far as the last
marking ring (100%) before the plunger thread (the projecting part of the
plunger corresponds to size C minus size A, see "Dimensions", page 24).
With the plunger in this position, the output signal from the displacement
transducer (nominal sensitivity 80mV/V ±1%) has to be assigned to a display
or to an output signal from the amplifier.
With WA electronics the output signal of the displacement transducer in this
end position is 10V ±0.05V.
Plunger
Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï Ï
Thread
Fig. 5.2 Plunger with markings (sensitivity balancing)
5.2.2

Direct calibration

If a high degree of precision is required, we recommend direct calibration using
gauge blocks with dimensions corresponding to the displacement, movement
or change in length that you wish to measure. Use commercially available
gauge blocks or templates for this purpose.
18
100%
A00546_11_YI0_01 HBM: public
Transducer
50% 0%
WA...