HBM TB1A Mounting Instructions page 10

10
• Different stiffness conditions in the shaft run to those of transducer
calibration
These test bench reactions on the reference transducer are calibrated in by
adaptable lever ground systems, for example.
Torque transducer
to be calibrated
Blocking device
Fig. 4.1: Typical installation in a calibration test device
Parasitic loadings
Parasitic loadings are caused by deformations in the shaft run. They result in
an additive effect on the zero signal of the torque measuring disc (see
Specifications). If they occur during a torque loading, they cause an apparent
change in sensitivity.
Countermeasures:
1. Optimum alignment of the shaft run (note alignment data in the
Specifications!).
As long as you do not exceed the permissible limits for bending moments,
transverse force and longitudinal force, no special couplings or other
measures are required to install the reference torque measuring disc
(effect on the measurement result approx. 1 % of nominal torque).
HBM
Lever force device
for static torque
TB1A
Calibration test device with
reference transducer
TB1A
A0162 7.0 en/de/fr