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## Charged property of red copper

Conversion requirements for charged performance of red copper and matters needing attention in detection

Conversion of resistance coefficient and conductivity

1. The relationship between conductivity and resistance coefficient is as follows

The resistance coefficient (volume resistivity) of the material is the reciprocal of the conductivity; for example, conductivity 58, the corresponding resistance coefficient is 1 / 58 = 0.017241, that is, when the conductivity is 58, the corresponding conductivity is 100%.

2. The relationship between resistance coefficient and conductivity of International Annealed Copper is as follows
At 20 ℃, the conductivity of 100% IACS is equivalent to the resistance coefficient of 0.017241 Ω· mm? / m.

3. Conversion between resistance coefficient and conductivity:
When the conductivity (at 20 ℃) = 0.017241 Ω· mm? / m △ 20 ℃, the measured resistance coefficient × 100% IACS.

4. Comparison table of resistance coefficient and conductivity: refer to table 1.

Relationship between resistance coefficient and test temperature and its conversion

1. The standard requires the tested material to be tested at 20 ℃ for 24 hours.

2. When the temperature is higher than or lower than 20 ℃, the temperature difference coefficient should be converted.

3. The corresponding table of temperature difference coefficient in resistance coefficient test: refer to table 2.

4. Conversion of resistance coefficient: actual resistance coefficient = test resistance coefficient △ corresponding coefficient of temperature difference.

Precautions for electrical performance testing

1. As far as possible, the material to be tested was placed at 20 ℃ for 24 hours.

2. The cross-sectional area of the material to be measured should be measured with precision measuring tools and weighted average after multi-point measurement.

3. Ensure that the tested material is flat and free from crease, hard injury, distortion and other phenomena, so as to ensure the accuracy of the test results.

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