MTS SWIFT 20 Ultra Sensor - Manual (Page 55)

TISHUNT - Low-Profile Transducer Interface Shunt
SWIFT 20 Sensors Software Utilities 55
Setting Up Shunt Calibration Reference Values
The tishunt utility provides all of the necessary functions for setting up a
Transducer Interface with valid Shunt Cal Reference values.
Note This procedure should only be performed by qualified service personnel.
Before running the tishunt utility, connect the Transducer cable and Shunt cables
from the SWIFT Low-Profile TI to the SWIFT Transducer Assembly. Power up
the SWFT Low-Profile TI and wait for the red Fail indicator on the Low-Profile
TI front panel to go out (this indicates that the Low-Profile TI is ready).
Note that it is not necessary to perform a System (Transducer) Zero prior to the
Shunt Cal.
Procedure
1. Launch the tishunt utility.
2. Using Option 2, enter the desired shunt tolerance.
3. Using Option 5, command a shunt cal, and wait for it to complete. This
causes the Low-Profile TI to apply and measure each shunt delta. These
measured values will be written as the Cal Reference values. The Shunt
indicator on the Low-Profile TI front panel should not blink (blinking
indicates that the shunt cal verification failed).
4. Using Option 1, read the current shunt parameters. It is not necessary to save
these to a file. Review the measured values and verify that they are correct.
5. Using Option 6, write the last shunt measurements to a parameter file. This
sets up a file that contains the eight Set Shunt Cal Reference commands,
with the last measured values as the values for the commands. This step
does not download the values, but forces the generation of a shunt cal
reference parameter file.
Write down the filename that is generated, as it will be required later.
6. Using Option 3, restore shunt parameters from a file. Enter the filename
used in Option 6 (Step 5). The tishunt utility then downloads the shunt cal
reference values to the Low-Profile TI. These values are written into non-
volatile memory within the Low-Profile TI, and are automatically restored
whenever the Low-Profile TI is powered up.
7. Using Option 5, command another shunt cal, and wait for it to complete.
This provides a verification, showing that the values downloaded are valid.
The Shunt indicator on the Low-Profile TI Front Panel should not blink
(blinking indicates that the shunt cal verification failed).