MTS SWIFT 20 Ultra Sensor User Manual
Page 30
SWIFT 20 Sensors
30
Calibration
Hardware Overview
When you press the Shunt button, the associated Shunt LED lights. As the Low-
Profile 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, indicating that the shunt calibration has failed. See the chapter
on page 127, for more information on dealing with shunt
calibration failures.
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.”
Shunt verification
You can check the electrical integrity of a transducer at any time by pressing the
Shunt switch. Subsequent shunt commands compare the current feedback values
against those stored in the Low-Profile TI. You may set the tolerance values for
each Low-Profile 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=-3.91836
FX2ShuntDeltaRef=-3.91896
FY1ShuntDeltaRef=-3.92366
FY2ShuntDeltaRef=-3.91639
FY3ShuntDeltaRef=-3.91824
FY4ShuntDeltaRef=-3.92494
FZ1ShuntDeltaRef=-3.92282
FZ2ShuntDeltaRef=-3.92673
FX1ShuntDeltaMeas=-3.91854
FX2ShuntDeltaMeas=-3.9192
FY1ShuntDeltaMeas=-3.92412
FY2ShuntDeltaMeas=-3.91572
FY3ShuntDeltaMeas=-3.91815
FY4ShuntDeltaMeas=-3.92464
FZ1ShuntDeltaMeas=-3.9227
FZ2ShuntDeltaMeas=-3.92646