NI PCI 4060 overrange question

[redly1]

I want to use the NI PCI 4060 multimeter card and Labview 7.0 to measure AC voltage and current from an AC power supply (and some other stuff). The problem is, the power supply has an output range of 0-267VAC. The 4060 product description says "0-250VAC, with overrange up to 300VAC." What I would like to know is, above 250VAC, will the card tell Labview the voltage or just OVERRANGE??

thanks

[Mark_S1]

You will get the voltage back, up to 300V. Above 250V however, the specs aren't guaranteed. Above 300V the OVERRANGE value (NaN) will be returned.

Mark

[Sonya W.]

The following excerpts from the NI 4060 User Manual (see link below) address your question:

page 2-7:
The NI 4060 can measure AC voltages to its specified accuracy as long as the voltage is at least 10% and no more than 100% of the selected input range. The DC component in any of these ranges can be as high as 50 VDC. Each range has a 10% overrange. The 250 VAC range can overrange up to 300 V.

The AC voltage measurement accuracy depends on many factors, including the signal amplitude, frequency, and waveform shape.

page G-6 (definition of overrange):
overrange - a segment of the input range of an instrument outside of the normal measuring range. Measurements can still be made, usually with a degradation in specifications.

So the DMM should return measurements for the entire range of your power supply (up to 267 VAC). However, there will be a degradation in specifications above 250 VAC.

I hope this helps!

Sonya Wornson
Applications Engineer
National Instruments

[redly1]

I wondered about that.

Anyone know if there is a PCI 4070 card in the works?
Any idea what it will cost, if there is?
I see the PXI 4070 is $1000 more than the PXI 4060.

[Mark_S1]

Yes, there is a PCI 4070 in the works and the price will be in the neighborhood of the PXI 4070.