digital input pin transition

[Lawrob]

I am in need a help fellow Labview users. I am using an external controller board with a digital pin that will used to synchronize thermocouple temperature measurements.

In doing this the following is the logic I am trying to implement.

1. Detect a low to high pulse transition
2. Then, start a timer
3. Detect, high to low pulse transition
4. Then, stop timer
5. Then record time delta

I am using a NI-6009 multichannel I/O module

I truly do appreciate help with this!

Lawrob

[crossrulz]

This sounds like what you really want to use is a counter.  You can setup a Two-Edge Separation counter that will do what you want.

[Lawrob]

Thanks for the response but I do not have a counter and only have the NI-6009 I/O module. Do I need a specific type of counter or equipment to do what you recommended?

[crossrulz]

Actually, most NI DAQ devices have a counter.  In the case of the US-6009, it just counts negative sloped edges.  If you want to keep with USB, you should go with a USB-6210.  It has 2 counters on it that you can perform the two-edge separation measurement with.