MTS SWIFT 20 Ultra Sensor - Manual (Page 134)

SWIFT 20 Sensors 134 Troubleshooting
Shunt Calibration indicator
light blinks after shunt
calibration indicating
Shunt Calibration failed. The shunt cables are not
connected, or are damaged,
or their connectors are not
secured. Check that the shunt connectors were securely
installed during the shunt calibration procedure.
Verify that the cables are not nicked, cut, or
damaged, and that no connector pins are
damaged. Make sure that pins shown in the
cable drawings are securely positioned in the
connector.
The signal cable is not
connected to the SWIFT
transducer. During a shunt calibration, the shunt cables
provide the shunt across the individual bridges,
but the outputs that are verified in the TI come
from the output signal cable. Check that the
output signal cable is not damaged and is
securely fastened to both the TI and the
transducer.
Excessive noise on the
signal caused the shunt
tolerance to be exceeded. Electrical Noise: The SWIFT sensor has power
conditioning, shielded cables, and on-board
amplification to reduce electrical noise.
However, if the TI or transducer are very near a
powerful noise source, some noise can be
picked up with the signal.
Check that the TI electronics are grounded
properly at the power cabling or grounding bar
located on the back panel of the TI box. If
possible, perform the zeroing and shunt
calibration procedure away from the powerful
noise source.
Physical Noise: If the transducer is part of an
assembly that is connected to active hydraulics
or other assemblies that may experience
physical vibrations, these vibrations may be
picked up as inertial forces read by the
transducer. Check that the transducer is not
experiencing dynamic loading or vibrations
during the zero process or shunt calibration.
A temporary fix is to increase the shunt
verification tolerance by changing the setting in
the TI. Note that any temporary fix by
increasing the tolerance may allow a shunt
calibration to pass, when it may be indicative of
a problem that should not be ignored.
The slip ring or road
simulator connector housing
assembly is not transmitting
a signal. The shunt procedure requires the output through
the slip ring or connector housing. Make sure
that the slip ring and connector housing
connections are secure and that no connectors
appear to be damaged. If possible, swap it out
with another connector housing to verify that
the component has not failed or been damaged.
Troubleshooting Guide (part 8 of 14)
Symptom Possible Causes Solution