Shunt Calibration in The Real World.

[@malgailany]

Measuring very low resistance in the field could be challenging even with a Kelvin (4-wire) measurement device. Thanks for the well explained, theoretical, and practical tips.

[@MicroMeasurements]

You are welcome!

[@victoral5396]

Thank you for explaining it in such a clear and approachable way! Amazing stuff... Just one question, when it comes to half bridge circuits, how do I shunt calibrate my gauges? Can I just shunt my secondary strain-gauge or do I have to shunt both of them? I am using this configuration bc I would like to correct for temperature related errors...

[@darrylpeterson5394]

Hi Victor. Under normal circumstances, you can shunt calibrate just one arm of the Wheatstone bridge. This could be active one of the active strain gages or the fixed precision resistors that complete the bridge. Keep in mind that you may have to take into account the number of active arms if trying to determine the strain response of your part because now you have two strain gages contributing to the signal, not just one. We have a pretty good explanation and equations for this found in the Technical Note TN-514 on Shunt Calibration- Starts on page 36: docs.micro-measurements.com/?id=2415

[@victoral5396]

@@darrylpeterson5394 Hi Darryl. Thank you for the reply, much appreciated. The document was very helpful! 😁

[@박광일-m1w]

Please also ask how to attach a 1000 degree strain gauge.