... . Power supply: Three phases, 380V±10%, 50Hz;h. Working environment: Indoors temperature--30, Relative humidity≤80 ... ), LCD 17 INCH displayer; g. H&P Color ink jet printer;h. High precision data acquisition chip (16 ... finishing the test;g. Mechanical limit protection;h. Overload protection: when the load exceeds 2 ... such as speed, displacement, and strain force;l. Auto shift: The speed of crosshead can ...