Check IEPE sensor connectivity and IEPE status (PCI 4472)

[Ian_Ren]

After some discussions with NI support engineers, it appears it is not possible to "poll" the status of IEPE of PCI 447X dervices. One has to either re-set IEPE or keep a track of the IEPE status with his software.

Thanks

Ian 

[swiftibis1]

Hello Ima,

I'm using an IEPE piezo impulse hammer that I'm trying to trigger off of for a modal analysis test.  In my VI I do a pre-measurement to get the DC value of the signal on my 4472, then I add to that value a little (0.002 V) and use that as my trigger level  This way when I tap the hammer it will trigger.  Sometimes this trigger value is over 10V, and the VI errors out because I set a trigger threshold higher than the allowed 10V.  If the 4472 can indeed take a higher voltage during the measurement, how do I get around this?

I usually do 25 or more taps in a measurement, so the 'ocassional' error happens frequently enough in practice to mess up my tests.

Thanks!