Well, we know that the VOLTAGE resolution is 20 V divided by 2^11 steps = 0.009766 Volts per step. Suppose your LVDT produces 0-5 V for a displacement of 0-10 inches. That's a factor of 10 inches divided by 5 Volts = 2 inches per volt.
Multiply 2 inches per Volt times 0.009766 Volts per step, and you get 0.019532 inches per Step - that's your displacement resolution. If you can possibly configure the DAQ card to use a 0-5 V range instead of +/- 10V, you're better off doing that. That will get you 5-mil (.004883 inches) resolution instead of 20-mils (.019532). In any case just remember: Inches Volts Inches ------- x ------ = ------- Volt Step Step <p>
