MTS WIFT Mini Transducer Interface - Manual (Page 61)

Data Collection
SWIFT ® Mini TI Installation 61
Data Collection
After you zero the TI, you are ready to collect data.
Note If you turn off power to the TI boxes, the zero values will remain valid, but
after power is restored, the wheels should be rotated at least one full
revolution so that the encoder can detect the index pulse to properly
convert the rotating coordinates to stationary coordinates. The
transducer outputs will not be correct until this happens.
1. Remove the vehicle from the lift or jacks.
2. When the vehicle is on the ground, check to see if the Fz reading is
approximately equal to the corner weight of the vehicle.
3. Ensure that the connector that attaches the signal cable to the top of the slip
ring is secured with high quality duct or electrical tape.
This will prevent dust, dirt, and water from entering the connector and
causing wear on the pins and sockets.
4. Perform a final inspection of the SWIFT sensor and the electronics to ensure
that everything is secure and that the TI boxes are on (see the note above).
After the zeroing procedure, the settings are stored in non-volatile memory
in each TI box and will be retained when power is cycled. However, if the
environment temperature changes significantly, or the anti-rotate is
modified, rezeroing is recommended.
Note Rezeroing the transducer is good practice when thermal changes occur.
Rezeroing the transducer at conditions and temperatures closest to the
test conditions will provide a more accurate zero and reduce thermal
errors.
5. Turn on the data recorder.
6. Start data collection.
Important Before beginning data collection, read the following cautions.
The SWIFT assembly will protrude from the side of the vehicle.
Bumping the SWIFT assembly into hard surfaces such as garage doors,
ramps and railings, or objects such as rocks, stumps, and earth, will
damage the anti-rotate device, cable, slip ring, slip ring bracket (spider), and
transducer.
Do not allow the SWIFT assembly to bump into any hard surfaces or objects while
you are driving the vehicle. Remember to allow extra space on each side of the
test vehicle when driving through areas with possible hazards.
CAUTION