ENERGY METER Loop Resistance (RL) measurement Measures AC phase voltage between 0V to 440V AC Measures line frequency ENERGY METERMS5910RCD/LOOP TesterFeatures·· Trip ... –440V AC·· Measures line frequency between 45Hz –65Hz, DC·· Test Current Multipliers 0.5, 1 and 5·· Fast/Slow testing ... of 10, 30, 100, 300, 500mA·· 1000 test result memory·· Data storage function and uploading to PC by ...