Custom Scaling Issue

[J.A.C.K.]

Hardware: I have a SCXI - 1000 being controlled by a SCXI 1600 module. I am reading a voltage into a SCXI-1100 with a SCXI-1303 as a terminal block.

Software: SignalExpress 2.5

OS: Windows XP

Signal Input range is set at -10 to 10 Volt range. I tried to setup a linear custom scale =>  

Temp = 233.4(Voltage) - 18

With this scale the temperature maxes out at 28.678, but if I take the scale off the voltage is not capped and keeps moving. Can anyone tell me what is going on?

[Russ@Davis]

Is this response you get in Signal Express, MAX, or both?

[J.A.C.K.]

Both

[hoffiz]

Hi Jack

Let see if your temperature maxes out at 28.678 that will correspond to a voltage of 0.199 and can infer from your post that without the scale you are able to read more than 0.199 volts.

I have two solutions for you: first you can change the “Signal Input Ranges” to a range including the result in temperature that you are expecting, see how the “scaled units” changes from volts to “custom”. Second you can create a formula to scale the volts to temperature and avoid changing the “Signal Input Range” to the new custom scale.

I hope it helps

Message Edited by Jaime F on 11-07-2007 05:54 PM

[J.A.C.K.]

The issue was the limits on the custom scale. Thank you Jane. 😄