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Custom Scaling SE

I,m using Map Range Scale in custom scale.
 
prescale values  2 - 10 v
scaled values  0 - 3000 psi
 
The max value celings out at 1300.
 
When I dont use custom scale the voltage will see 10 v, so I know everthing is working.
 
Any suggestions or is this a problem in SE.
 
Thanks
 
 
 
 
 
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Message 1 of 5
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Hi Drifter,

I tried using the Map Range Scale in LabVIEW SignalExpress version 2.5 and had no problems. I mapped a 2-10 V signal to a 0-3000 scaled value. 

What version of SignalExpress are you using?


What version of the NI DAQmx driver do you have?


Did you ever calibrate your DAQ card before scaling?

Try using a Linear Scale to essentially do what the Map Range would do.  Keep me posted on your results.




Best Regards

Hani R.
Applications Engineer
National Instruments
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Using SE 2.5 with 8.6 DAQmx on a USB6210.
I installed the new drivers from 8.5 to 8.6 and it did not make a difference.
I still top out at 1.3K.  Without the custom scale I can go to 10 volts.
 
I have not done any calibration.
 
Any more suggestions?
 
By the way we taked by phone a month or so ago about the trigger problem and the signal generator.
 
Thanks
 
 
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Hi drifter,

I believe the reason your signal is railing at 1300 is that Input Range was not configured after you setup your scale.  The KnowledgeBase article, KB 33BHM4E6: DAQmx Custom Scale Type Map Ranges Do Not Display Correct Value, describes where to setup the Input Range.  For your application, you will change the Min to 0 and the Max to 3000.  Let me know if changing the values works. 





Best Regards

Hani R.
Applications Engineer
National Instruments
Message 4 of 5
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I was using the wrong values for the input range.
This worked thanks.
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