HBM TB2 Montageanleitung Seite 9

TB2
4 Mounting
4.1 General mounting instructions
When the torque reference transducer is installed in a test bench, the test
bench components (frame, couplings, connection flanges, screw connections,
etc.) influence the deformation behavior in the shaft train and therefore also
the measurement characteristics (zero point, sensitivity, reproducibility). The
causes can be:
• Additionally occurring parasitic loads such as radial/axial forces or bending
moments
• Asymmetrical torque application in the transducer
• Stiffness conditions in shaft train deviating from the transducer calibration
These effects of the test bench on the reference transducer can be calibrated
in e.g. with adaptable mass‐lever systems.
Torque transducer
to be calibrated
Locking device
Fig. 4.1: Example for installation in a calibration test machine
Parasitic loads
Parasitic loads are produced due to tension in the shaft train. They lead to an
additive effect on the zero signal of the torque transducer (see specifications).
If they occur during a torque load, they cause an apparent change in sensitiv­
ity.
A0884-5.0 en/de
Torque generation
TB2
Calibration test machine with
reference transducer
9
HBM