... permanent magnet test system, GB3217-92, used to measure the major and minor hysteresis loops, demagnetization ... keyboard, mouse to finish testing. The non-computer mode needs only to press a start-on button and can ... choose test period from 5 seconds to 70 seconds to meet the test requirement in different ... English character, system of unit, single picture or multi-picture to be chose.The quality of DX- ...