... /1t, 2t/1t, 5t/2t, 10t/5t, 20t/10t overload detection system,cable rope chain tester,dynamometer,overload load cell, force tester ... function*. Tare/Zero function*. Easy calibrating and rectifying weighing value*. System accuracy: ±5%FS*. 3 step safety warning:1. 90% FS ...