|1. Apply the supply voltage to the sensor (10 Volts DC) by connecting Plus to pin 1 and Minus to pin 3. pin 2 is the wiper output contact and can never be connected to either Plus or Minus - this would destroy the potentiometer.
2. Attach a Volt Meter to pins 2 and 3 of the sensor.
3. Move the shaft of the potentiometer to the position where the voltage meter reads exactly 50% of the supply voltage
(10VDC / 2 = 5.000 Volts).
4. Leave the shaft in this position of the potentiometer. It is the center position.
5. Use multiple gauge blocks to add them up to 40 mm to create the 10% travel point.
6. Align the gauge blocks with the tip of the shaft.
7. Provide a mechanical stop at the other end of the gauge block.
8. Take the gauge block out and extract the shaft to the end stop.
9. Read the voltage and make a note.
10. Use multiple gauge blocks to add them up to 80 mm to create the 90% travel point.
11. Retract the shaft and fit the gauge block between the end stop and the tip of the shaft.
12. Read the voltage and make a note.
13. Subtract the lower voltage reading from the higher one.
14. The calibration factor (In this example ) = voltage difference divided by 80 mm.
The calibration factor is then added to the transfer function to take out linearity error that occurs over the range of travel leaving your output readings matching the length of travel to within the devices specifications.