PXI-5105 clipping voltage to ~ 19V

The PXI-5105 should be able to measure voltages of Ridge Crest of 30 V.  I have a set of 3, 9V batteries to give me a total of 27 volts through a resistance.  PXI clips this tension about 19V however.  I confirmed with a multimeter I have 27 volts.  I have a value of 1 Mohm input impedance.

Thanks for any help.

Hi cuxcrider,

The maximum range of 30 V on the 5105 is a peak to peak voltage, which means that the higher voltage, it can measure compared to ground (0 V) is + 15 V, except if you apply a DC offset, which unfortunately cannot be done on the 5105 OR. Generally, you will see a little higher than the specified value rail voltage, but generally you shouldn't play in this region because you may cause damage to the Board of Directors and measures out of spec. hope this helps,

Tags: NI Products

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