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Wheatstone Bridge Output & Nonlinearity

One Active Gage

Description (Note 1)     Single active gage in uniaxial tension or compression.

Output Equation (Note 2)     mV/V ( Nonlinear )

Nonlinearity    

Actual Strain     microstrain

where:

  = gage factor of both gage and instrument
  = actual strain, in uniaxial tension or compression, in the axial direction
  = total strain indicated by the strain gage instrument
  = uncorrected axial strain


Note 1 : The resistance of each arm in a branch between the power corners of the bridge is nominally the same for both arms.
Note 2 : A constant-voltage power supply is assumed. Also, , and are expressed in microstrain units.