Simultaneous Temperature and Strain Measurement

[Danny_Nelson]

Good Afternoon! I was looking for advice on how construct a vi file to measure temperatures from two type k thermocouples and quarter bridge type two configured strain gauges on my NI9219. I have been able to build a vi to accurately measure and record my thermocouple data, but when I try to add the strain gauges to the block diagram the file no longer functions. Any ideas/suggestions would be greatly appreciated!

[GerdW]

Hi Danny,

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@Danny_Nelson wrote:

I was looking for advice on how construct a vi file to measure temperatures from two type k thermocouples and quarter bridge type two configured strain gauges on my NI9219.

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I suggest to stay away from DAQAssistent ExpressVI and use simple plain DAQmx functions instead!

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@Danny_Nelson wrote:

I have been able to build a vi to accurately measure and record my thermocouple data, but when I try to add the strain gauges to the block diagram the file no longer functions.

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The thermocouple VI uses a lot of ExpressVIs and relies heavily on DDT wires. Atleast you should improve it like this:

Why is there a "stop" button connected to the DAQAssistent? As there is no loop in your VI it will automatically stop after the FileWrite! (You don't use the RunContinuous button, don't you?)

Where and how did you try to "add" the strain measurement? You only attach another VI, which is not related to the thermocouple VI in any way.

What means "no longer functions"? Do you get wrong measurements? Do you get error messages? Does LabVIEW crash? Does Windows crash in a BSOD?