Description
Professional lightning rod earth meter
This professional range lightning rod earth tester measures the resistance of the earth connection using the three-point method. Compact and light (2,602 kg), its dimensions are 240x250x100 mm. In addition, this meter is supplied in a carrying case. Also with three equipped cables and two measuring rods.
Measuring range
The lightning rod earth meter performs earth resistance measurements by constant current of 800 Hz, 2 mA in a voltage range of 0-200 V AC (40 ~ 500 Hz).
Therefore, it offers several measurement ranges: 0-20 Ω, 0-200 Ω, and 0-2000 Ω, with a resolution of 0.01 Ω. Powered by 6 1.5 V batteries, it incorporates functions such as open circuit indication and measurement memory. It complies with IEC 1010, overvoltage category III.
As a reminder, the measured resistance of the grounding conductor earth must be less than 10 Ohms to be valid. Otherwise, improving the earth connection is mandatory. For this, we offer several earthing materials to reduce the value of the earth connection resistance.
Additionally, you can consult our services for advice. So, do not hesitate to consult us: info@lpsfr.com
3 point method
The three-point method for measuring earth resistance is a precise technique that uses three electrodes and a tellurometer. Then, two electrodes are placed at a fixed distance to generate an electric current in the ground.
At the same time, the third electrode, located between the two, is used to measure voltage. The lightning rod earth meter injects a current into the ground via the external electrodes. In fact, the potential difference is measured between the third electrode and one of the injection electrodes.
Thus, this method makes it possible to determine the specific resistance of the ground by calculating the resistance between the central electrodes. It is essential for evaluating the effectiveness of earthing systems, particularly for the safety of electrical installations and protection against lightning.
