Timing delay after an even before taking a reading

[swinchen]

Hello all,

I am working on a research project where we need to change the temperature of a device and then wait between 25 and 30 ms before starting a periodic A/D sampling loop.   Now my question is how do I accurately sample some time after a given event?  Also how do I get a timestamp on samples in relation to a given event?


For hardware we have measurement computing PCI-DAS6071 and PCI-DAC6703

Thank you in advance for your time and help.

Sam

[Christian Mergl]

Hey,

You could use an Start Trigger to start your acquisition, then it is possible to delay the acquisition after the Trigger occured using the following property:

Message Edited by Christian_M on 01-08-2008 09:23 AM

[swinchen]

Interesting,  those blocks look unfamiliar to me.  Will they work with measurement computing boards as well as NI boards?   I think that is where I am having the greatest deal of difficulty is not knowing which group to ask 🙂


Thanks!

[Christian Mergl]

This are DAQmx VIs...., and they are working with NI Boards, like the PCI-6071 you mentioned.

[Nick_F1]

Hi Swinchen,

The block that you probably do not recgonize is a DAQmx Trigger Property Node.  You can find it in the Measurement I/O >> NI-DAQmx >> Triggering Node.

Hopefully this will get you started.