Pointer ground hybrid combiner n-female Note:

I. Test method:

1. Place the instrument in the horizontal position and check whether the pointer of the galvanometer is on the center line. Otherwise, apply the zero regulator to adjust it on the center line.

2. Set the "multiplier scale" to the maximum multiple, slowly turn the crank of the generator, and turn the "measuring scale dial" to make the galvanometer pointer point to the center line.

3. When the galvanometer pointer is connected to the ** scale, speed up the rotating speed of the generator handle, so that it reaches more than 120 revolutions per minute, and adjust the "measuring dial", so that the pointer refers to the center line.

4. If the reading of the "measuring scale" is less than 1, the multiplier should be placed in a smaller multiple, and the "measuring scale" should be readjust to get the correct reading.

5. When filling in this record, the plan of resistance test points shall be attached, and the test points shall be numbered sequentially.

Ii. Precautions:

1. Disconnect the ground line from the protected device to ensure the accuracy of the measurement results.

2. It can not be measured after rain and when the soil absorbs too much water, and when the climate, temperature, pressure and other rapid changes.

3. There can be no stray current and polarized soil near the measured pole.

4. The probe needle should be kept away from large metal bodies such as underground water pipes, cables and railways. The current pole should be kept away from 10m or more, and the voltage pole should be kept away from 50m or more.

5. Pay attention to the position where the current pole is inserted into the soil, and the ground rod should be in a state of zero potential.

6, the connection line should use well-insulated wire, so as not to have leakage phenomenon.

7, the test site can not have electrolytic substances and rotten bodies, so as not to cause illusion.

8. The test should be carried out when the soil resistivity is high, such as in early winter or summer during the dry season.

9. Check the accuracy of the instrument at any time (send it to the measuring unit for testing and identification once a year)

10. When the galvanometer sensitivity is too high, the voltage pole of the potential probe can be inserted into the shallow soil. When the galvanometer sensitivity is not enough, water can be injected along the probe to moisten it.

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