1. Features This product adopts advanced microcomputer technology to automatically monitor the whole welding process, and has a timing AC voltage transformer with constant voltage. It has strong function, stable performance, small size, strong applicability, safe and reliable use, and is an ideal machine for PE pipe electrofusion welding. Processing scope: 20-315 other models: 250 motor 2KW 450 motor 5kw manual/bar code dual-use automatic welding machine input voltage: AC220V +20%/-10% rated output power 3KW working temperature: -10- +45 degrees relative humidity: 90%, no condensation control mode: constant pressure effective welding voltage: 15-40V (2.5/3KW) Series) Resolution: 0.1V Effective welding time: 1-9999 seconds, resolution 1 second Effective tube fitting resistance sampling range: 0.1-50 ohms, resolution: 0.1 ohms.