Cooper Instruments & Systems LXT 981 Torque Sensor - Manual (Page 12)

CF 189 12 Rev. E; Dec. 12, 2011
which is listed in the calibration certificate as well as on the label of the sensor. The calibration certificate
also shows the accuracy of each sensor. The accuracy class of a Cooper Instruments torque sensor
means that the largest single deviation of all values represented in percentage is either smaller than or
equal to the value listed in the accuracy class.
Calibration value:
The calibration characteristic value shows how
much the output signal changes per torque.
There is no difference whether the torque is
directed to the left or to the right.
Hysteresis:
Hysteresis expresses the biggest difference
between upwards and downwards branches at
one torque level in percentage.
Rotational Signal Uniformity (RSU):
RSU is a signal variation created during 360°
rotation of the sensor shaft without torque. The
modulation is the difference between minimal
and maximal values during this single rotation.
RSU is generated by small homogeneities in
the magnetic field and depends mostly on the
property of the sensor shaft.