read lvdt in MAX

[ivan1]

I'm using " measurement & automation explorer" for the first time. I'm trying to aquire a reading from AC LVDT sensor. In analog input configuration menu, I'm prompted to give exication souce voltage, sensitivity units, range?

My questions are:

exication source voltage, is that in VRMS of AC peak to peak?

sensitivity units: in specs for the sensor sensitivity is given as 4 V/inch/V, but in MAX only option with inches is mV/V/0.001in. The units seem to me different....? Should I input 4 mV/V/0.001in?

and finally, range: is that linear range of the sensor or stroke?

I've tried to find answer to these questions in the help file, but I couldn't find anything.

Please let me know,

Thanks,

Ivan

[Otis]

Hi Ivan,

In your post you mentioned that you are using MAX and trying to aquire some LVDT measurements for the first time, but you had a few questions:

1. Excitation Voltage:  The Excitation Voltage refers to the V_RMS value of the AC excitation voltage.
2. Sensitivity Units: The only values supported are mVolts/Volt/0.001 Inch and mVolts/Volt/mMeter.  In your 1 mV/V/0.001 inch = 1 V/V/1 inch (0.001/0.001 = 1).
3. Range: Refers to the maximum linear range for the sensor.

I hope this information helps you.

Regards,