A real-time multi-point ground resistance monitoring device comprises a plurality of monitoring ports 141 connected to multiple test ground points in parallel via conductive wires 300 and measures the resistance between each ground and an AC mains 200 earth using a power supply 130. Each monitoring port is configured with a range of acceptable ground resistances and operates an alarm when the measured ground resistance of a monitoring port exceeds a threshold or safe range. The monitoring device can be calibrated to automatically offset the resistance of conductive wire 300 from the measurement result when the conductive wire is too long by comparing its resistance with that of an identical wire. The monitoring device further comprises a display and keypad 120, a processor 110 and a two-way interface 150 allowing remote operation and monitoring over a network 500.
Real-time multi-point ground resistance monitoring device