A Wheatstone bridge with a strain gage is shown above. The nominal gage resistance is 120 Ohm. The gage factor is 2.065. Assume that the temperature dependence of the resistance of the strain gage is R = R_0(1+0.004 Delta T). (Delta T in units degree C) V_s = 10V. a.) You apply a strain of 500 mu strain to the gage. What resistance of R_2 do you require to compensate the bridge? b.) Express the effect of temperature in units mu strain/degree C. Assume that the temperature in the lab has a maximum change of 3 degree C. what would be the systematic uncertainty on a strain measurement? Note that this estimate is not including self-heating.

45 - A Wheatstone bridge with a strain gage is shown above. The nominal gage resistance is 120 Ohm. The gage factor is 2.065. Assume that the temperature dependence of the resistance of the strain gage is R = R_0(1+0.004 Delta T). (Delta T in units degree C) V_s = 10V. a.) You apply a strain of 500 mu strain to the gage. What resistance of R_2 do you require to compensate the bridge? b.) Express the effect of temperature in units mu strain/degree C. Assume that the temperature in the lab has a maximum change of 3 degree C. what would be the systematic uncertainty on a strain measurement? Note that this estimate is not including self-heating.

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images - A Wheatstone bridge with a strain gage is shown above. The nominal gage resistance is 120 Ohm. The gage factor is 2.065. Assume that the temperature dependence of the resistance of the strain gage is R = R_0(1+0.004 Delta T). (Delta T in units degree C) V_s = 10V. a.) You apply a strain of 500 mu strain to the gage. What resistance of R_2 do you require to compensate the bridge? b.) Express the effect of temperature in units mu strain/degree C. Assume that the temperature in the lab has a maximum change of 3 degree C. what would be the systematic uncertainty on a strain measurement? Note that this estimate is not including self-heating.

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