... class 0.1 Advanced power source technology, and operation software Test 3~60 various meters Comprises of PWM power sourceStandard meter configuration ... power: accuracy 5%3~60 meters testing stations are availableBasic tests: intrinsic error test, hidden acction test, start test, standard deviation testInput power ... -2, 4-3, 1-2-4-3 (or 1-4,3-2,1-4-3-2) can be performed 1-PH KWH Meter Test Bench