Syncronization beetween DAQ and Switched DMM

[Mariangela_Camarda]

Good evening to all,

I'm working on an application with QMH architecture in which I use a PXIe4309 analog input board and a 4081DMM  switched with a PXI2527.

I realized to separate loops int QMH in order to measure. Moreover I route the start trigger of the PXIe4309 on Switch.

Consider that I acquire 12 channels with 4309 and 12 channels switched with the 4081dmm.

How can I configured a correct scan rate for the DMM?

I hope that someone could help me ASAP!

Thanks!

[santo_13]

DMM and the SWITCH modules have a bunch of handshaking triggers and events to automate scanned measurements.

In the triggering structure, you can also bring in DAQmx.

I couldn't understand how you relate both 4309 and 4081? do they use the same Switch channels or measure the same signal?

Please elaborate on the signals each of the instruments measure and their significance in your application.

"Consider that I acquire 12 channels with 4309 and 12 channels switched with the 4081dmm.

How can I configured a correct scan rate for the DMM?"

[Mariangela_Camarda]

@santo_13 thank you for your answer!

I Try to explain better my needs:

I have 12 DUTs on which I make two kind of measures in parallel:

- Using PXI4309 I measure an analog voltage;

- Using PXI4081 switched with PXI2127 I measure NTC temperatures.

I need to log measures in the same time so I need to work on syncronism of them. 

Please find attached my main code: two last while loop are relative to measures I need to perform.

Waiting for your help!

Thank you,

Mariangela

[santo_13]

Are you trying to measure temperature vs voltage?

[Mariangela_Camarda]

Sorry, I cannot understand what do you exactly mean... could you explain me better?

THank you