pressure transducer set up

[gamma6]

I have been having trouble setting up pressure transducers.  I am using Omega transducers with models from the Px602 series (10mv/v output) and px603 series (1-5vdc output)

I have a SCXI 1000 chassis with a SCXI 1600 usb connected to a laptop (windows XP)

I then have a SCXI1121 module with an SCXI 1321. From there I connect the transducer.

I was wondering if someone could help/guide me on setting these up.  What i mean is how to properly set gain jumper settings on the 1121 module for a certain transducer. Excitation jumper settings are straight forward.  I could also use some help how to set up a scale in MAX. 

For the Px602 series (10mv/v output) I use a linear scale in max.  the equation is y=10(psi rating)+b.  I simply multiply my transducer rating by ten and then offset the intercept according to how much it is off scale.  My gain setting is 1 for this type of transducer.  I am not sure how I got that scale nor why my gain setting is 1.  I used an old coworkers notes, but would like to understand why those particular settings were used for that certain transducer. 

If anyone can provide a link or some material on how to properly set up any type of tranducers it would be helpful.  Something with all the proper steps to get it running would be great.

[WillPwr]

Hello, gamma6!

The 1121 user manual should have all the information you need on the jumper settings for a given type of wiring/signal, starting on page 2-1 (page 18 of the manual found here).

In terms of the scale, ther could be a few things going on. The factor of 10 could have been to scale the data in volts to mV, since your sensitivity is 10mV/V. If you're sure it is, indeed, scaling the psi reading and not the raw voltage, then perhaps it was an attempt to account for the gain of 10 on the card. (Gain jumper settings for the card can be found in the above maual as well). If your PSI gain is 1, and PSi is the value in that scale, then there is probably no need for the scale at all.

For making your own custom scale, take a look at this article: How Do I Make a Custom Scale in Measurement & Automation Explorer (MAX)?

For more information on setting up sensor measurements in MAX, take a look here:  Getting Started with NI-DAQmx: Measurement & Automation Explorer (MAX) Functionality

You're on the right track so far, and I think the above information will help you get up-and-running. Let us know if you have any questions on the above!