What is the distance between the two grounding piles of the grounding resistance measuring instrumen

Product introduction: Double jaw grounding resistance tester is suitable for testing the grounding resistance of various equipment and building grounding devices. Soil resistivity can also be measured under a wide range of conditions.

In addition to the function of traditional auxiliary ground electrode measurement of ground resistance, the instrument also has the unique function of unassisted ground electrode measurement, which changes the traditional measurement principle and means of testing ground resistance. There is no need to play the auxiliary ground pole and isolate the grounding body from the equipment, which realizes the best measurement. This machine has an intelligent measurement function, which can store and browse the measurement results, and display the prompts using Chinese characters.

Product features: 1. Suitable for any grounding place, non-grounding contact measurement and auxiliary pile dual measurement mode, no multi-point or single-point grounding, can be tested normally;

3. Strong anti-interference ability, self-generated high-frequency current, so as to filter 50Hz, 100Hz and other harmonic interference currents in the mains, even in the environment of 500kV substation.

can also measure accurately;

4. Automatically display the resistivity of the soil, no need to calculate cumbersomely;

5. Built-in large-capacity memory, which can store 100 sets of measurement data;

6. Equipped with charger and rechargeable battery, power-saving design, automatic power-off after the specified time;

7. The four-wire method is used to measure, and the following grounding resistance can also be accurately measured.

Here's how to measure ground resistance with a multimeter:

1. Use the multimeter to measure the operating voltage at the same time, if the measurement result is lower than the line voltage, it is more grounded. If there is no voltage display, you can use the following method instead. 2. Use the multimeter to measure the resistance of the wire to the ground (there is a small resistance when grounding, depending on the nature of the grounding) is generally less than a few hundred k.

3. Necessary safety measures must be taken to prevent personal electric shock.

4. It is forbidden to use a multimeter to measure the current in place.

5. The first method cannot be blindly adopted even if there is a small voltage indication. It should be remeasured in exchange for a smaller voltage equivalent.

The working principle is that the grounding resistance measuring instrument abandons the traditional manual hand-cranked power generation working mode, adopts advanced medium and large-scale integrated circuits, and applies DC AC conversion technology to combine the three-terminal button and four-end button measurement methods into a new type of grounding resistance measuring instrument.

The working principle is that the DC converter in the machine converts DC into AC low-frequency constant current, through the auxiliary grounding electrode C and the DUT E to form a loop, the AC voltage drop is generated on the DUT, which is sent to the AC amplifier for amplification through the auxiliary grounding electrode P, and then sent to the meter head display through the detection. With the help of the magnification switch, three different limits can be obtained: 0 2 , 0 20 , 0 Mori 200.

The distance between the two grounding piles is 100 meters, and we are happy to answer for you. <>

If you mention that there are good grounding devices at both ends, the resistance between the two must be close to zero ohms before hail, if the grounding performance in both places is not ideal, the resistance will be larger, it is estimated that it should be within hundreds of ohms, the specific value depends on the grounding performance. If the grounding performance of both is up to standard, it can be measured with only a multimeter, but the resistance of the measured wire should also be within the range of consideration. Hope the above helps

The seasonal coefficients for the months January, February, March, April, May, June, July, August, September, October, November, and December are ., respectively35。

Note: 1. Multiply the actual value measured by the grounding resistance tester by the seasonal coefficient to obtain the actual grounding resistance value of the measured object Formula: grounding resistance value = the actual value measured by the grounding resistance tester Grounding resistance connection coefficient.

2. General buildings require that the comprehensive grounding resistance value is not more than 1 ohm of curved silver mold, the value of lightning protection grounding resistance is not more than 10 ohms, and the repeated grounding resistance value of the inlet line is not more than 4 ohms.

According to GB50057-94 (2000 Edition) "Code for Lightning Protection Design of Buildings" Chapter III, lightning protection measures for buildings;

1. Section II, Requirements for lightning protection measures for Class I lightning protection buildings, Article 1:

The grounding device of lightning protection induction should be shared with the grounding device of electrical equipment, and its power frequency grounding resistance should not be greater than 10.

2. Section 3, Requirements for lightning protection measures for the second class of lightning protection buildings, Article 1:

The grounding resistance of each down conductor is not less than 10, and the grounding device of anti-direct lightning should be shared with the grounding device of anti-lightning induction, electrical equipment, information system, etc.

Article: lightning arresters, cable metal sheaths, steel pipes and insulator legs, fittings, etc. should be connected together to the ground, and the impact grounding resistance should not be greater than 10. Overhead and directly buried metal pipelines should be connected to the nearest lightning protection grounding device at the entrance and exit of the building; When not connected, the overhead pipeline should be grounded, and its impact grounding resistance should not be greater than 10.

3. Section 4, Requirements for lightning protection measures for the third category of lightning protection buildings, Article 1:

The impact grounding resistance of each down conductor should not be greater than 30. Article: lightning arresters, cable metal sheath and insulator iron feet, fittings, etc. should be connected together to ground, and its impact grounding resistance should not be greater than 30.

1. Two-wire method conditions: there must be a known ground with good grounding, such as pen, etc., and the measured result is the sum of the resistance of the ground being measured and the known ground. If it is known that the hand-judged ground is much smaller than the resistance of the ground to be measured, the measurement result can be used as the result of the ground being surveyed.

It is suitable for: dense buildings or cement floors and other areas where sealing cannot be driven piles. Wiring:

E+ES receives the surveyed ground and H+S receives the known ground.

2. Three-wire method condition: there must be two grounding rods: an auxiliary ground and a detection electrode.

The spacing between the ground electrodes is not less than 20 meters. The principle is to add a current between the auxiliary ground and the ground to be measured to measure the voltage drop between the ground to be measured and the probe electrode, and the measurement results include measuring the resistance of the cable itself.

Suitable for: foundation grounding, construction site grounding and lightning protection grounding. Wiring: S is connected to the detection electrode, H is connected to the auxiliary ground, E and Es are connected to the ground to be measured.

3. The four-wire method is basically the same as the three-wire method, which replaces the three-wire method when measuring low grounding resistance and eliminating the influence of the resistance of the measurement cable on the measurement results. E and ES must be separately connected directly to the ground to be surveyed. This method has the highest accuracy among all ground resistance measurement methods.

4. The grounding resistance of each grounding point in the multi-point grounding measurement is measured by a single clamp, and the grounding connection cannot be disconnected to prevent danger. Suitable for: multi-point grounding, can not be disconnected, measure the resistance of each grounding point.

Wiring: Monitor the current at the measured grounding point with a current clamp.

5. Double clamp method: multi-point grounding, no auxiliary ground pile, measurement of single grounding. Wiring: Use the current specified by the manufacturer to clamp to the corresponding socket, and clamp the two clamps on the grounding conductor, and the interval between the two clamps should be greater than meters.