external timer using ni usb 6251 code with labview

[edwad]

i need help pleas 

how to write external timer using ni usb 6251 code with labview to measurment pulse width about 5 msec

[ConnorM]

 Hey edwad,

I am a little confused with your question. Do you mean..

1) You have an external clock that you want to use to take pulse width measurements.

Or do you mean

2) You want to measure the pulse width of a external clock?

[edwad]

hey connorM

I want to measure the pulse width of a external clock.

[edwad]

hey 

i wont to measure pulse width using external clock with ni usb 6251 in labview

[ConnorM]

Here are three good examples that measure a pulse width of a signal. 

https://decibel.ni.com/content/docs/DOC-25244

https://decibel.ni.com/content/docs/DOC-25245

https://decibel.ni.com/content/docs/DOC-25246

I hope these help

Connor

[edwad]

hey connor

i need to measure pulse width and if is big than 30msec i need count this pulse this process be attracted for  5 sec and stop.

the time must continue and be exact also if  no pulse at all

i try to do it with ni usb 6251.

edward

[ConnorM]

The first example above will allow you to read in pulse widths until the stop condition is met. In the example the stop condition is the stop button OR an error in the DAQ occurs. You can add more stop conditions to this to match the functionality you want.

[edwad]

hey connor

i will try 

thank you

edward