MTS SWIFT 10 MC Sensor - Manual (Page 77)

Road and Track Vehicles
SWIFT 10 MC Sensors Installing the Transducer 77
Verifying the Quality of the Zero Procedure
Perform the following consistency checks for each SWIFT sensor while the
vehicle (or corner) is elevated.
1. Does Fz measure the approximate weight of the tire/rim assembly?
2. Is Fx small (less than 0.1% of the rated load)?
3. What is the variance in Fz (modulation) when the tire is slowly rotated? The
typical value should be <100 N.
4. When the vehicle is on the ground, is the Fz reading approximately equal to
the corner weight of the vehicle? (See , “Effect of zero reference on SWIFT
output,” on page 78.)
5. Perform a shunt calibration on each transducer.
Press the Shunt button on the front of the TI box (see the next figure), or use
the TI2SHUNT program.
The shunt indicators will toggle until the process completes. If the red failed
indicator lights, the shunt calibration has failed.
6. Verify that the outputs from the TI box matches those on the calibration
report.
Use either the TI2SHUNT or TI2XFER program to look at the shunt values
of the individual bridges.
The shunt calibration will fail if the measured shunt values are >2% (the
shunt tolerance) of the reference values that were set at the factory.
Typically, the shunt values will vary a maximum of 0.020-0.030 V from the
reference values.
Refer to the chapter, “ Troubleshooting ”, for more information on dealing
with shunt calibration failures.
Shunt Button
and Indicators