Interface TS14 - Natural Resonances; Disturbance Variables; Calibration Control (Option)

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TS Series Reaction Torque.doc
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Page 9 of 11
6.4.2 Natural Resonances
Estimate of the mechanical natural frequencies:











21
0
11
2
1
JJ
cf

f
0
J
1
, J
2
c
= Natural frequency in Hz
= Moment of inertia in kg*m²
= Torsional rigidity in Nm/rad
Operation of the device in natural resonance can lead to permanent damages.
6.5 Disturbance Variables
By disturbances, measured value falsifications can occur by
 Vibrations,
 Temperature gradients in the torque sensor,
 Temperature changes,
 Electrical disturbances,
 Magnetic disturbances,
 EMC (electromagnetic disturbances),
Therefore avoid these disturbance variables by decoupling of vibrations, covers, etc.
6.6 Calibration Control (Option)
By a control resistance, a signal is generated in the
sensor which corresponds to the nominal value of
the sensor.
Advantage:
Re-Calibrations are reduced. Before each
measurement the zero point and the nominal value
can be checked.
Function:
By applying positive SG supply, the measuring
bridge is electrically detuned, so that at the output a
measuring signal of 100% of the nominal value is
available.
Optionally 50%, 80% possible.
Use calibration control at unloaded torque sensor, only.
c
J
1
J
2
R
k
R
1
R
2
R
4
R
3
Supply +
Control
Signal +
Signal -
Supply -
external switch
SG
Sensor External
Speisung +