This machine is a new spring testing instrument,which use several advanced technologies so as to further improve the test accuracy and ensure the testing efficiency. The test load is divided into 3 grades so that the testing range is expanded. The machine can test 9 testing points at different speeds and return to the initial position automatically. 6 types of files can be stored for future usuage. It can also auto-revise the dis[lacement of the load cell. What's more, the machine also has function of peak value holding, overload protection, zero clearing at any test point, stiffness calculation, data retrieval, etc. It's suitable for the test of all precision extension & compression springs and testing fragile materials.