Connecting PXIe-4081 to a 500V source while in Current Mode

Updated Sep 29, 2021

Reported In

Hardware

  • PXIe-4081

Issue Details

Can PXIe-4081 DMM withstand a 500Vdc source when we use it as an ammeter?

Solution

When in current mode the voltage driving the current is not that relevant, but the current going through the device should not exceed the maximum current range. The maximum current range for the device specifically for PXIe-4081 is 3A. As long as the current expected to flow through the DMM does not exceed this value, then it can be used as an ammeter in the circuit.

Note that the voltage protection is still maintained at 1000Vdc for input protection which is for any spike voltage that goes over the fuse.