PXI-4070 limit voltage

[boit2201]

I search the correct and low cost multimeter for my project. The PXI-4070 is perfect for my application. But I have questions about specifications of limits voltage.

For one measure of voltage, the signal to measure is 240VACrms, 60Hz so ±340V peak.

In datasheet of PXI-4070, the voltage limit for AC measurement is 300Vrms and ±450Vpeak. It's ok for my application.

But the spec in isolated digitizer mode are ±100 mV to ±300 V (DC or AC coupled). If i want to do acquisition of signal curve. I can or not? Because ±450Vpeak are greater than ±300VDC but my signal is 240Vrms and 240Vrms is less than 300Vrms. The limit voltage in digitizer mode is not clear.

If the limit is ±300Vpeak in digitizer mode. What will happen if i measure the signal 240Vac ±340Vpeak? I will see clipping in signal curve? The PXI-4070 will domaged by this measure?

Thank you!

[GarPar]

Hi boit2201-

     The +/- 300V spec will result in a clipped signal just above 300V (at about 315V).  The 340V will not damage the 4070 since we have overvoltage protection at 450V as you previously stated.

     The PXI-4071  has +/- 1000V range.  That may be another option for you.

     I hope this helps.  Best of luck with your application!