After installing strain gage, the main quality verification and examination test are the isolation impedance and resistance shift.

The strain gage is made by foil alloy. Its isolation impedance after installing is more than 20 GΩ.

Use room-temperature curing adhesive, the gage resistance shift value must be less than 0.5%.

Use bake curing adhesive, the gage resistance shift value must be less than 2%.