I just have a few questions about the best way to set up a system to measure 4-350 ohm strain gauges at the same time. Will I need to link 1 LJTick-InAmp for each bridge circuit? Will the T7 be able to provide the excitation voltage needed to run 4 bridge circuits?
.png%3Fitok=PHGBxf6M "EEV Blog Reviews LabJack T7-Pro & Software Tools")
.jpg%3Fitok=B1YcuDFK)
.png%3Fitok=Ybt-OlgU "LabJack + JEDI One Can Create a Powerful Distributed DAQ Ecosystem")
The InAmp has two differntial channels. So, one InAmp can be used to condition two bridge circuits. Each InAmp has a Vref that can be used to power the bridges in parallel. I would power the bridge from the InAmp that measures it. That would be two bridges powered by each InAmp.
Would it be possible to run the strain gauges without the InAmps?
The T7 can read the strain gauges directly. I recommend using differential mode, so you will probably need the CB37 to get to the 8 AINs you need. The Vs terminals are too noisy to be used to power the bridge circuits. The DACs may be OK, but a good reference supply would be best.
Do you have any suggestions for the reference supply?
Check out item #1 of post #13 here, and let us know if you need more help:
https://forums.labjack.com/index.php?showtopic=4376