FIELD-TESTING INSTRUMENT Accuracy class: 0.1 (0.05) The field-testing instrument is made by using the ... the value of single or 3 phase parameters as voltage, current, frequency, energy, power factor and etc. In the field, it ... : 45Hz 65HzInput Voltage: 10V 450VInput Current: Terminal input: 0 5A (1A)Clamp type meter input: 0 ~ 5A or 0 ~ 800AInput Current : Clamp type meter input ...