... low-high display judge;4, 8 different kinds of impact device are available; distinguish automatically, no need calibration;5. 128 ... value, Average value, Max/ Min value, Material, Type of impact device connected, measurement times, operating instructionAccuracyWithin ±0.5% (at HLD= ... (steel only)Thickness coupled: Minimum 3mm or more( Impact device G:10mm)Testable work pieceMass:5kg or more(2-5kg on ...