Can I synch up a continuous DMM measurement with a DAQ measurement?

[GS]

I need to get continuous measurements with a PXI-4071 DMM (current measurement) and a PXI-6254 DAQ (voltage measurement) but I can't figure out how to synchronize the two measurements. I'll be grabbing data at reqular intervals from the acquisition to compute a running average energy so I need the two measurements to line up in time. It's possible (but not as desireable) to get the current measurement with the DAQ, but the DMM would give us a better measurement. The only way I can see to come close to what I want is to trigger both measurements, but then there will be a gap in the measurement while I read the data and setup for another trigger.

George

[aNIta B]

Hi George,

       There are a few resources that I think would benefit you:

Configuring a PCI-4070 DMM to Share Triggers from Another PCI Device

Synchronizing Two DMMs with an External Trigger

PXI-407x DMM Synchronization Q&A

Take a look at those and let me know if you have other specific questions.  Using your DAQ counter as your trigger source while doing a continuous acquisition shouldn't make you lose samples.  Have a great day!

[GS]

Thanks. That answered my question. Unfortunately it wasn't the answer I was hoping for.

George

[aNIta B]

Hi George,

     Sorry it wasn't the answer you were looking for.  Do you have any other specific questions?  The second link I posted gives some example code, and the first link explains how to use the trigger lines of the DMM.  I'd be happy to shed more light on this topic if there are more questions that you have.  Have a good one!

[GS]

Sorry, I worded my response ambiguously. Your answers were fine. It's just that I can't do what I was hoping to do with the two DMMs. We're going to have to use DAQ boards instead.

George