Tape Measure is a commonly used tool in daily life. What you often see is the Steel Tape Measure, which is a commonly used tool in construction and decoration, and it is also one of the necessary tools for the family. Divided into fiber tape measure, tape measure, waist circumference and so on. Luban ruler, Feng Shui ruler and Wen Gong ruler are also Steel Tape measures.
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1999, is a modern chemical measuring tool manufacturer integrating
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Ground Resistance Tester Notes
1. The grounding line must be disconnected from the protected equipment to ensure the accuracy of the measurement results.
2. There should be no stray currents and polarized soil near the measured ground pole.
3. When the soil absorbs too much water after raining, and when the climate, temperature, pressure, etc., change drastically, it cannot be measured.
4, the probe should be away from the groundwater pipe, cable, railway and other large metal body, in which the current pole should be more than 10m away, the voltage pole should be more than 50m away,
If the metal body is not connected to the grounding grid, the distance can be shortened by 1/2 to 1/3.
5, the connection line should use well-insulated wire, so as to avoid leakage phenomenon.
6. Pay attention to the position where the current pole is inserted into the soil and the grounding rod should be at zero potential.
7, the test should be selected when the soil resistivity is large, such as when the early winter or summer dry season.
8, the test site can not have electrolytic material and decayed bodies, so as not to cause illusion.
9. When the sensitivity of the galvanometer is too high, the voltage probe of the potential probe can be inserted into the soil slightly. When the sensitivity of the galvanometer is not enough, it can be humidified along with the probe water injection.
10. Check the accuracy of the instrument at any time
What should I pay attention to when using a grounded resistance tester?
The grounding resistance tester has high measuring accuracy, high speed, and convenient use. It is especially suitable for high-demand laboratory and automatic detection lines.