MTS SWIFT 45 GLP Sensor - Manual (Page 29)

Calibration
SWIFT ® 45 GLP Sensors Hardware Overview 29
When you press the Shunt button, the associated Shunt LED lights. As the TI
automatically switches through the series of bridges, it verifies that the outputs
are within the accepted tolerance range. If all bridge shunt values fall within the
tolerance range, the Shunt LED on the front panel will go off (after several
seconds). If any bridge fails to fall within the shunt tolerance range, the LED will
blink and error light turns on, indicating that the shunt calibration has failed. For
more information on dealing with shunt calibration failures, see the chapter,
“Troubleshooting.”
Example of Calibration File Shunt Data
The above example shows shunt data from the calibration file. This data may be
transferred, using the TIXFER program, from the transducer interface RAM to a
computer or from a computer to the transducer interface RAM. Note that items
marked ShuntDeltaMeas are uploaded from RAM, but not downloaded from the
computer.
For more information on TIXFER, see the chapter, “Software Utilities”.
Checking the
calibration
You can check the calibration of a transducer at any time by pressing the Shunt
switch. Subsequent shunt commands compare the current feedback values
against those stored in the TI. You may set the tolerance values for each TI by
editing the calibration file. See the chapter, “Setting up the Transducer Interface”,
for instructions.
If the current feedback values from a shunt calibration are outside the tolerance,
the Shunt LED blinks to indicate a failure.
ShuntTolerance=2
FX1ShuntDeltaRef=-1.379
FX2ShuntDeltaRef=-1.386
FY1ShuntDeltaRef=-1.381
FY2ShuntDeltaRef=-1.378
FY3ShuntDeltaRef=-1.382
FY4ShuntDeltaRef=-1.381
FZ1ShuntDeltaRef=-1.380
FZ2ShuntDeltaRef=-1.380
FX1ShuntDeltaMeas=-1.378
FX2ShuntDeltaMeas=-1.386
FY1ShuntDeltaMeas=-1.380
FY2ShuntDeltaMeas=-1.379
FY3ShuntDeltaMeas=-1.382
FY4ShuntDeltaMeas=-1.382
FZ1ShuntDeltaMeas=-1.385
FZ2ShuntDeltaMeas=-1.382