01-16-2008 07:55 PM
01-16-2008 11:28 PM
01-17-2008 01:22 PM
01-18-2008 07:17 PM
To count the pulses coming from the flow meter, I am
trying to use the Basic Level Trigger Detection VI. The VI that I have
developed is attached with this post.
I am using a modified version of the Basic Level Trigger Detection VI that I
found on this Discussion forum. I tested the VI with a simulated square wave
signal and it works very fine. But when I try to read the signal from the flow
meter, the trigger count keeps resetting, i.e. I see values like 50, 56, 58,
49, 52, 54, 56, 58, 40 ...etc. I could not find out the reason why this
was happening.
My main aim is to read the number pulses coming from the flow meter and calculate
the flow rate in grams/min. Any help in achieving this will be greatly
appreciated.
The details about the flow meter are as follows:
Manufacturer: DEA Engineering
Web site: www.deaengineering.com
Calibration Factor: 51 pulses per CC.
01-19-2008 09:17 AM
01-21-2008 12:30 PM
Lynn,
Thank you very much for your reply.
I am attaching the Detect All trigger VI with this post. Please take a look at
it and let me know why it keeps re-setting the count.
Meanwhile I replace the DAQmx Express VI with the individual VIs and see if works
better for me.
If the Detect All trigger VI can give me an accurate count of the triggers I
will not need the counter that is incremented using the Boolean output of the
VI.
I will also make the other changes suggested by you.
Thanks.
01-21-2008 11:06 PM
12-09-2010 03:58 PM
Do you have a newer version of your vis
09-05-2011 07:12 AM
hope this helps. You would need to change the "the flow meter tooth volume constant".