How to understand the strain gauge of the impact tester

andImpact testing machineThe technicians of Jinan Hengsi Shanda Instrument Co., Ltd. made a clear summary of the concepts related to strain gauge:

The working current of the strain gage of the impact test machine is the current value that allows passing through the sensitive gate without affecting its operating characteristics for the installed strain gage. Strain limit of strain gauge:Impact testing machineThe strain limit of the strain gauge is also for installed strain gauges. It refers to the true strain value when the relative relative error of the indicating strain and the real strain does not exceed the specified value when the temperature is constant.