Can I use a probe with my NI4461 to measure the 100vpp(permanent)?

Hello

I use a NI4461 card with 2 inputs and 2 outputs. I have a signal generator with a signal of 125 Hz 100vpp(permanent) I want to characterize using labview (FFT, amplitude, etc.).

The limits of entry on the NI4461 being +/-42 .4V, I was hoping to use a X 10 probe, which is similar to a scope.

However I find this works do not correctly in the mitigation of the probe doesn't seem to be a constant 10 x. Although my reach (with a second probe) reads 100vpp(permanent), my NI4461 detect 82Vpp.

Am I missing something? Are there alternatives to read > 42.4 v reports on the 4461 with a probe?

I checked and exchanged probes and they both work find on the scope, but not on the 4461. Is there a special probe that has a match of good impedance for the 4461 you can recommend?

Thank you

Thanks for the suggestion.

I actually build an out two very large resistance voltage divider which seems to work fine.

The circuit is simple, two resistors in series connected to the ground at the same time on my main unit. By attaching the son of sense of tension on a single resistance I can divide the voltage in two (two resistors have the same index). I calibrated the system and it seems to work.

Thank you for your suggestions.

Tags: NI Products

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