MASTECH MS5908C LCD Digital Circuit Analyzer Voltage GFCI RCD Fault Tester Low Voltage Distribution Line Fault Test Meter Circuit Tester

features, it can detect multiple problems on a line, such as causing to electric shock, electrical fire, abnormal operation of equipment, etc.
Features:
TRMS measuring AC voltage.
Artificial load 12A, 15A, 20A measuring line drop.
Measuring phase voltage, neutral line(zero line), voltage to earth, peak voltage, frequency.
Measuring phase(live line), neutral line(zero line), earth line conductor impedance.
Identifying 3-wire socket connection mode(zero for left and live for right, having earth line or not).
Test the reliability of residual current device(RCD) and response action time.
Test the reliability of GFCI action and response action time.
Backlight function and data hold function.