MTS SWIFT 50 GLP Sensor Heavy Trucks - Manual (Page 78)

SWIFT 50 GLP Sensors 78 Troubleshooting
The shunt reference values
were changed. Use the TI2XFER program to upload the
current calibration file. Check the file to verify
that the variables ShuntDeltaRef are the same
as shown on the original calibration file
provided by MTS. The eight ShuntDeltaMeas
values should read approximately 0.85 V.
The shunt tolerance is not
set correctly. Use the TI2XFER program to upload the
current calibration file. The ShuntTolerance
value should be set at 2, indicating an allowable
shunt variation of 2%. If this value is changed to
zero or a very small number, the difference
between the reference and the current shunt
measurement may fall outside of this tolerance
and be read as a shunt failure.
Transducer cable problems. If the ShuntDeltaMeas values are not the same
as (or within tolerance of the ShuntDeltaRef
values), note which shunt values are not the
same.
If all eight are not correct, check the shunt
cables, signal cable, and power supply.
If four of the signals are not correct, verify that
both shunt cables are plugged in and are not
damaged. (Each shunt cable shunts four
bridges). If connections appear correct, swap
the transducer cable and check whether the bad
shunt values follow the cable. This indicates a
damaged or faulty cable. Check that the cable is
not damaged, and that connector pins are not
missing or damaged.
Use the same swapping technique if one or
more signals is not correct. In this case swap the
slip ring bracket and note which bridge has the
different value. If the faulty shunt value stays
the same with the slip ring bracket, look at the
connectors for damage or objects plugging the
connector and contact MTS.
Troubleshooting Guide (part 7 of 11)
Symptom Possible Causes Solution