Working principle: The digital earth resistance tester abandons the traditional manual hand-cranked power generation working method, adopts advanced medium and large-scale integrated circuits, and applies DC/AC conversion technology to combine three-terminal and four-terminal measurement methods into a new type of earth resistance tester.
Scope of Application
This instrument is suitable for measuring the earth resistance of various devices in departments such as electric power, posts and telecommunications, railways, communications, and mining, as well as measuring the resistance of low-resistance conductors; it can also measure soil resistivity and ground voltage.
Instrument Features
Structurally, high-strength aluminum alloy is used as the casing; in the circuit, to prevent power frequency and radio frequency interference, a phase-locked loop synchronous tracking detection method is adopted, combined with a switched capacitor filter, giving the instrument good anti-interference capability.
DC/AC conversion technology is used to convert direct current into low-frequency constant alternating current for ease of measurement.
Allow the auxiliary grounding resistance to vary between 0~2KΩ (RC) and 0~40KΩ (RP) without affecting the measurement results.
