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[Daan82]

Hello i am Danny. 

Just start with labview basics, but i can use some help. 

I have a (pressure) signal from a QuantumX MX840B. The signal is from a pressure vessel and i want te count how often the barrel is at 8 bar.

This is working but it counts continulously. so i need a kind of stop or reset.

thanks 

[PalanivelThiruvenkadam]

You acquired data once and Just Increment in a loop, Even the Acquisition should be inside loop and Incremet the counter only when it is above 8.

use Shift registers to hold the previous count.

[Daan82]

Thanks 

I just use Shift registers and put a slide i it. so it easy to test. 

The pressure signal is sometimes hours above 8 (bar) and the counter should only add 1 at a time.

[GerdW]

Hi Daan,

so you should determine when the value is crossing the limit - and not, when it is greater equal limit!

There is a function named PtByPt BooleanCrossing: that will help you…

[PalanivelThiruvenkadam]

Even your Acquisition logic should be inside the loop.

Its Simple add/Increment whenever Pressure signal (in bar) is above 8, else hold with the old value using shift register.

[Daan82]

the is no PtByPt BooleanCrossing in my labview.

is there another solution?

i try to update 

[PalanivelThiruvenkadam]

Try This

[GerdW]

Hi Daan,

are you really using such a tiny font size on your computer???

See the LabVIEW help…

[Daan82]

Thanks Palanivel 

Unfortunately this is not the solution, the counter must stop at 1 now he count continues.

when the pressure vessel is empty it will pumped fully with air. when it is at 8bar a 2 must be made of the 1 

i am updating labview!

[Daan82]

I found a solution, maybe a bit cumbersome but it works for me. 

thanks for help.