What units do I use for "niDMM Config Measurement" Range input?

[srgray]

I'm trying to use LabVIEW 8.2 to program my PXI-4072 DMM. I'm using "niDMM Config Measurement.vi" to select measurement type and range. The range input is a floating point value. What units does it expect for the different measurement types? (Capacitance, Inductance, DC Volts, AC Volts, Resistance)

thanks,
Stephen

[Dennis_Knutson]

There are no units. As you said, you just provide a floating point number. Simply by looking at the front panel of that function, you'll see it has no unit label.

[srgray]

Let me restate my question. For instance, if I want to do a DC Voltage measurement, I might put "1.0" in for the Range input. I assume that the VI expects my Range input to be in Volts for a DC Voltage measurement, so that would 1.0 Volts. But what about measuring capacitance? If I wire "300" in for the Range input for a Capacitance measurement, does that mean 300 Farads or 300 Picofarads?

Thanks,
Stephen

[Dennis_Knutson]

Everything is entered as a floating point number. For 300 picofarads, you would enter 3E-10 if your numeric constant/control is set for Scientific display. Set it to SI notation, and you can enter 300p. Set the display format to floating point, you enter .0000000003. They will all do the same thing.

[BrowningG]

Hello Stephen,

Dennis has pointed this out correctly.  The range input of the Configure Measurement VI uses the native units of that measurement.  This means that for 10 Volts you will use 10 and for 300 picoFarads you would use 300p or 0.0000000003. 

Please post back if you have any more questions.