MTS SWIFT 50 GLP Sensor - Manual (Page 55)

Road and Track Vehicles
SWIFT 50 GLP Sensors Installation Installing the Transducer 55
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?
4. When the vehicle is on the ground, is the Fz reading approximately equal to
the corner weight of the vehicle, minus the tare weight? (See , “Effect of
Zero Reference on SWIFT Output,” on page 56.)
5. Perform a shunt calibration on each transducer.
A. Elevate the vehicle on a lift, or jack up each corner.
B. Connect the shunt calibration cables from the Shunt A, Shunt B
connectors on the front of the transducer to the Shunt A, Shunt B
connectors on the back of the TI box (see the next figure).
C. Connect the signal cable from the slip ring to the Slip Ring connector
on the back of the TI box.
D. Press the Shunt button on the front of the TI box, or use option 5 in the
TISHUNT program.
The shunt indicator will light continuously for 30–45 seconds. If the
indicator continues to flash after shunt calibration is complete, the
shunt calibration has failed.
Acceptable Variations for Fx, Fz Readings
Transducer Model Max Rated Load
(Fx, Fz)
Fx Reading
with Vehicle Lifted
Fz Modulation
with Vehicle Lifted
SWIFT 50 GLPS
(stainless steel) 220 kN 0.1% (220 N) 0.2% (±220–440 N)
SWIFT 50 GLPT
(Titanium) 150 kN 0.1% (150 N) 0.2% (±150–300 N)