HBM TTS Mounting Instructions page 26

Specifications
Nominal (rated) torque M
for reference only
Relative reproducibility error b
in varying mounting positions
Relative reproducibility error b
with varying lever arm lengths
Relative zero error f
related to sensitivity
Relative reversibility error h
Relative interpolation error f
1)
The classification results from a DKD calibration certificate (which has to be ordered separately),
allowing the transducer to be used as a transfer torque wrench. The testing procedure is carried
out according to DKD guideline DKD-R 3-7.
2)
The specified values are mainly determined by the square adapter and its fixation. They are valid
if the square adapter is used which is included in the standard scope of supply. If used
appropriately, it is not possible, in practical applications, to apply bending moments and axial
forces up to the specified limits, because these are transferred by the square connector only to a
limited degree.
Each type of irregular stress (bending moment, lateral or axial load, exceeding the nominal torque)
can only be permitted with its given static load limit if none of the others can occur. Otherwise the
limit values must be reduced. If for instance 30 % of the bending limit moment and also 30 % of
the lateral limit force are present, only 40 % of the axial limit force are permitted, provided that the
nominal (rated) torque is not exceeded. With the permitted bending moments, axial and lateral limit
forces, measuring errors of about 1 % of the nominal (rated) torque can occur. The effects of the
bending moments and lateral forces on the measurement result have already been taken into
account upon determination of the class according to guideline DKD-R-3-7 as far as these result
from the intended use of transfer torque wrenches (torque generation through force application on
the lever).
The values refer to the actual torque (actual value) and are valid for torques w 20 % of M
3)
24
nom
l
0
3)
3)
a
A1571-3.0 HBM: public
NVm 100 200
kNVm
ft‐lb 75 150
%
%
%
%
%
500
1 3
375 750 2,250
0.2
0.2
0.05
0.63
0.25
.
nom
TTS