JBS-B series digital display semi-automatic impact testers can determine the anti-impact capability of tough ferrous metal materials (like steel, iron and their respective alloys) under dynamic loads. While the operation of the tester is semi-automatic, the raising or release of the machine's pendulum is automatic. Its design meets the standard of ISO148, ASTM E23. The tester has a micro control meter or a remote control box. The pendulum automatically rises and is ready for the next impact and free releasing, all automatically on account of the remote control box or the micro control meter. It has a digital display. It has a three phase, four line, 50 Hz, 380 V power supply. Its weight is 600 kg for JSB 300 series and 800 kg for JSB 500.