On and Off signal

[KowdTek]

Hello, I'm trying to do a life test for air valves and I want a ON ang OFF cycles.

The estemated time for this test is about 5 days. What is the best way to do this.

My circuit (valve driver) requires 0 vdc for ON and 10 vdc for ON.

Any help will be appreciated. Thanks!

[arvin_labrat]

What kind of DAQ hardware do you have available.

You can generate a square wave with the Analog Out.

[KowdTek]

I'm using PCI-6024E with SCB 68.

So square waves from 0-10vdc will do. All I need to figure out is to put the ON/OFF time intervals.

I'm thinking to turn the valves ON for 30 sec then 5 sec OFF.

Thanks Arvin!

[David L.]

Hi Flip Tek,

Another option is to output an analog value, and update this as needed. To build upon the times you listed, you can output a 10v signal for 30 seconds, and then a 0v signal for 5 seconds, and have this sequence repeat (see picture below).

Regards,

Message Edited by David L. on 08-08-2007 12:05 PM