MTS SWIFT 20 Ultra Sensor - Manual (Page 95)

Test Track Vehicle for Slip Ring Sensor
SWIFT 20 Sensors Installing the Transducer 95
Verifying the Quality of the Zero Procedure
Important This section includes information related to the Low-Profile
Transducer Interface (TI). For SWIFT transducers designed to
operate with the newer Mini TI, there is a separate manual that
documents the Mini TI (MTS part number 100214316).
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? (See , “Effect of Zero Reference on SWIFT
Output,” on page 96.)
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.
Acceptable Variations for Fx, Fz Readings
Transducer Model Max Rated Load
(Fx, Fz) Fx Reading
with Vehicle Lifted Fz Modulation
with Vehicle Lifted
SWIFT 20 A (Aluminum) 21 kN 0.1% (±15–20 N) 0.2% (20–40 N)
SWIFT 20T (Titanium) 30 kN 0.1% (±25–30 N) 0.2% (40–60 N)