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Pressure Profile System - (ConTacts C500) - DAQ problem

I am working with a new system that my team has had for a while - a C500 ConTacts system from PPS.  First off, I am hooking the system up to a SC-2043 SG board.  The ConTacts system has a +12, ground, and out wire terminal.  I hooked the +12 to the + Ex channel, the ground is grounded, and then the out channel to the +Ch on the SC board.  When I run my program, or the test panels, all I get is a value that is what my voltage is set at. 

 

Has anyone used this type of system?  It seems to be that I have a simple connection problem, but can't solve it.  I've used tons of strain gauges with my DAQ board and Labview, but can't get this thing to work.  Any help?  I hook it up in the same manner, but nothing.  I've tried a lot of stuff to no avail, so any help would be awesome.

 

Secondly, the ConTacts system has a non-linear pressure profile.  I want to incorporate the Excel calibration file that came with the system so that it will display the actual force.  Best way to do this?  Can't seem to find any good examples.  Basically it would be a look up table where it records "x", then goes to the excel file to find the right curve, and then plot out "y".  Is the best way to best fit the curve in excel and then just use Labview to plug in the equation?  any help is also appreciated here...

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Anyone?  In the test panesl of MAX when I connect the power everything seems to be fine, but when I connect the "out" of the C500 box to the CH+ of the DAQ board, the test panel voltage jumps to -1 immediately.  Thoughts???

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Hello,

 

What Data Acquistion board are you using with the SC-2043 board?  Is your strain gauge full, half, or quarter? One thing I noticed is there is no connection to CH-, so if you wire that to ground do you see any changes?  By -1, do you mean it is railing at -1V? 

Kyle A.
National Instruments
Senior Applications Engineer
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