GD2571 digital ground resistance tester is a new type of digital portable ground resistance tester, which has abandoned the traditional manual power generation working mode, adopted advanced large-scale integrated circuit and applied DC\/AC conversion technology to combine the three-end button and four-end button measurement methods into one model.
The working principle is that the DC\/AC converter in the machine changes the DC into AC low-frequency constant current, and the circuit is formed by the auxiliary grounding pole C and the measured object E, and the AC voltage drop is generated on the measured object, which is sent to the AC amplifier through the auxiliary grounding pole P for amplification, and then sent to the watch head for display through the detection. With the power switch, three different limits can be obtained: 0 ~ 2Ω, 0 ~ 20Ω, 0 ~ 200Ω.
2, instrument range:
This table is suitable for power, post and telecommunications, railway, communication, mining and other departments to measure the ground resistance of various devices and to measure the conductor resistance of low resistance; This table can also measure soil resistivity and ground voltage.
3, instrument characteristics:
l structure adopts high-strength aluminum alloy as the shell, the circuit adopts phase-locked loop synchronous tracking detection mode to prevent power frequency and radio frequency interference, and is equipped with switched capacitor filter to make the instrument have better anti-interference ability.
l Using DC\/AC conversion technology to change DC into AC low-frequency constant current for easy measurement.
l This instrument does not need manual adjustment balance, 3(1\/2) LCD display, in addition to measuring ground resistance, but also low resistance conductor resistance, soil resistivity and AC voltage.
The commonly used instrument for testing and measuring grounding resistance is also an indispensable tool for electrical safety inspection and grounding project completion acceptance. In recent years, due to the rapid development of computer technology, the advanced grounding resistance tester can meet all the requirements of grounding measurement. Using the new clamp method, on-line direct measurement can be carried out without piling and laying out. A powerful ground resistance tester is controlled by a microprocessor, which can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network, and has unique functions such as numerical retention and intelligent prompt