Consider the selection of test machines from the perspective of test accuracy level

Consider the selection of test machines from the perspective of test accuracy level

The accuracy of the test machine directly affects the test results. When purchasing a test machine, we should first understand in detail. Currently, the accuracy of tensile testing machines in China is generally used in level 1 and level 0.5. It is sufficient to choose a level 1 test machine for general material tests. There is no need to spend more money to improve the accuracy. A level 0.5 test machine is required for scientific research and material analysis. In fact, the technical differences for level 0.5 and level 1 test machines are not obvious. The calibration methods and means are basically the same. This is the difference in correction points. With the development of sensor technology, the linearity of the sensor elements has reached a very high level. As long as the measurement circuit has no defects and the anti-interference performance is good, all test machines will reach level 0.5 accuracy. The electrical measurement has far exceeded the limit of level 0.5. The relative error defined by the national standard is still to be discussed.

The above technical data of the test machine is provided by Jinan Hengsi Shanda Instrument Co., Ltd.