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strain gage wiring for full bridge completion

I have ordered the 9237 full bridge strain gage module with screw terminals, for the compactRIO which has not yet arrived. In the meantime I am running wiring for all the sensors. I have 4 - three leadwire strain gages that I want to use in a full bridge. 2 for measuring bending strain and 2 perpendicular as a poisson gage. 

 

My understanding is (and let me know if it is wrong) that I do not need the third leadwire from each gage becuase of the full bridge completion, and therefore I would only need to run 8 wires back, along with 2 additional if I want to do shunt calibration?

 

Thanks for shedding some light on the situation.

 

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Correct.   you won't need the extra, thrid wire on all of those gages and will only need 2 wires (on opposite sides of the gage) from each gage.

 

If all the gages are close to each other, you should wire them to each other close to them using solder pads applied to the component.  Complete the bridge on the part and you will only need to run 4 wires from the part to the DAQ device.  As for the shunt calibration resistor, usually that is a part of the DAQ device, or is switched in close by, so extra leads from the part to the DAQ device shouldn't be needed for it.

 

Take a look at the instruction manual for more details.

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