Kaman digiVIT - Manual (Page 27)

www.kamansensors.com PART NO: 860525-001
Last Revised 9/16/2013
- 27 -
APPENDIX D: CALIBRATION EXAMPLES VIA ETHERNET INTERFACE
Calibrations using the Ethernet interface have the same procedure as the examples in Part 6 of
the manual. Data is entered using UDP commands from a PC instead of front panel controls.
To perform these procedures, the digiVIT must be connected by an Ethernet cable to a PC
running console software. Reference PART 5 of this manual.
Refer to Appendix B for typical offset and range of recommended sensors.
D.1 - 2 Point Linear Calibration
1) Set the sensor flush with the target and move the micrometer to the MIN (offset) position.
Zero the micrometer.
2) Position the micrometer at the desired MAX (full scale range + offset) position.
3) With the sensor at full scale, type UDP command ‘CF’. The unit will prompt 'Scanning Pls
Wait' -- this can take approximately 20 seconds. The unit is optimizing the setup for the
particular sensor, range, and target. Wait for this to finish.
4) Position the micrometer to the MIN position (offset). Type ‘CZ’, then ‘CP 0’ to take data.
5) Position the micrometer to the MAX position. Type ‘CP 2’ to take data, then ‘C2’ to
complete the calibration.
The calibration is now complete. If the calibration is good, the digiVIT will return a status of 0. A
status of 1 is returned on a bad calibration and the calibration must be performed again.
D.2 - 6 Point Polynomial Calibration
Most of the procedure is the same as the 2 point calibration except with more data points. This
calibration assumes the range is divided into 5 equal intervals. For example: a 0.5mm range
will be divided into 0.5/5 = 0.1mm intervals.
1) Set the sensor flush with the target and move the micrometer to the MIN (offset) position.
Zero the micrometer.
2) Position the micrometer at the desired MAX (full scale range + offset) position.
3) With the sensor at full scale, type UDP command ‘CF’. The unit will prompt 'Scanning Pls
Wait' -- this can take approximately 20 seconds. The unit is optimizing the setup for the
particular sensor, range, and target. Wait for this to finish.
4) Position the micrometer to the MIN position. Type ‘CZ’, then ‘CP 0’ to take data.
5) Go to the 20% position (0.1mm in our example). Type ‘CP 1’ to take data.