FUTEK TRS-Series - Manual (Page 17)

17 EM1005
6. Maintenance
TRD/TRH/TRS Series sensors are almost maintenance-free where the bearing needs to be
replaced by factory after its life time.
Durability of bearings in compensated temperature range is approx. 20,000 hours.
Durability of bearings in operating temperature range is approx. 10,000 hours.
For Precision applications: Calibration of the sensor should be done at FUTEK or with adequate
calibration equipment.
Calibration: Yearly calibration is recommended but it depends on the criticality of the application &
requirement and may require smaller calibration intervals.
Inspect torque sensor cable and mating connector for damage on a monthly basis.
7. Repairs
Shaft stiff to turn Bearing failure due to:
a) Torsional or flexural
vibration
b) High axial or radial loads
c) Worn bearings
d) Bent shaft Return to factory
Fault Possible Causes Solution
Zero shift less than 2% Torsional vibration
Torsional Shock The zero reading may be
re-adjusted at display
Zero shift between approx.
2 and 5% of full scale
Zero shift more than 5%
Torque sensor has been
overloaded
Torsional vibration
Torsional shock
Torque sensor overloaded by
high alternating loads or
torsional vibration
The zero reading may be
re-adjusted at the
display
Return to factory
Return to factory Torque sensor overloaded by
high alternating loads or
torsional vibration
Hysteresis between
clockwise and counter-
clockwise torque