After installing strain gage that main quality verify and examine test are isolation impedance and resistance shift.
The strain gage is maded by foil alloy whose isolation impedance value after installing is bigger than 20GΩ.
Use room-temputer curing adhesive the gage resistance shift value must less 0.5%.
Use bake curing adhesive the gage resistance shift value must less 2%.
When G.F. is 2 GT2 being a strain indicator then whose resolution is 2.

● A compact, instrument used to verify the electrical quality of a strain gage installation BEFORE it is placed in service
● Reads insulation resistance ( leakage ) to 20,000MΩ with 15Vdc
● Measures deviation of installed gage resistance from precise standards to a resolution of 0.0001%
● Ohmmeter scale for troubleshooting questionable installations
● Verifies the complete gage circuit, including lead-wires