DigiVIT User Manual - Kaman Precision | Position sensors

6.2 Calibration FixturingA good calibration starts with good calibration fixturing and reference. While in some cases thedigiVIT can be calibrated in-situ, it is typically calibrated using fixturing specially made for thepurpose. Small ranges may require special measuring equipment such as laser interferometersfor the best accuracy. If adequate fixturing is not available, Kaman offers a calibration service.Figure 4 Typical Calibration FixtureRefer to Appendix B for typical offset and range of recommended sensors.6.3 2-Point Linear CalibrationNote: Any previous temperature compensation calibration will be voided when a 2 Pt. calibrationis performed.The 2 point calibration is the simplest calibration and assumes the inherent output from thesensor is linear. Over the first 10% of the range this is true in a general sense, however evenwith 5% of the range; non-linearity is typically on the order of 1% of the calibrated full scaleoutput (though that is a pretty small absolute number typically). Over the standard full rangelinearity could be as large as 16%.1) Set the sensor flush with the target and move the micrometer to the MIN (offset) position.Zero the micrometer.www.kamansensors.com PART NO: 860525-001Last Revised 9/16/2013- 16 -