To determine whether the conductivity of the connector material meets the requirements, the following aspects can be taken into account:

Refer to material specifications and relevant standards

Material specification sheet: usually provided by the material supplier, which will clearly specify the electrical conductivity parameters of the material, such as conductivity, resistivity, etc. For example, the conductivity of pure copper is about 58 MS/m (megaSiemens/meter), and the conductivity of pure aluminum is about 37.7 MS/m. By comparing the parameters in the specification sheet with the parameter range required for actual use, it can be preliminarily determined whether the conductivity of the material meets the standard.

Related standards: Different industries and application scenarios have different standards and specifications for the conductivity of connectors. For example, in electrical equipment connections, national standards may specify the minimum conductivity requirements for connectors used for specific voltage levels and current carrying capacities. In the electronics industry, for some high-precision electronic component connectors, industry standards may have strict upper limits on their resistivity. Search and determine whether the conductivity of the material meets the requirements based on these standards.

Conduct laboratory testing

DC four probe method: This is a commonly used method for measuring material resistivity. By arranging four probes on the surface of the connecting piece, applying a known current, measuring the voltage drop between the probes, the resistivity of the material can be calculated, and the conductivity can be obtained. This method has high measurement accuracy and is suitable for connecting pieces of various shapes and sizes. However, for connecting pieces with insulation or oxide layers on the surface, it is necessary to first process them to ensure good contact between the probe and the material.

Eddy current method: For metal connectors with good conductivity, eddy current method can be used for non-contact measurement. When an alternating magnetic field acts on a conductive material, eddy currents are generated in the material, and the magnitude of the eddy currents is related to the conductivity of the material. The conductivity of materials can be indirectly obtained by measuring the magnetic field or induced electromotive force generated by eddy currents. This method is fast and non-destructive, but the measurement accuracy is relatively low and is greatly affected by the shape, size, and surface condition of the material.

Conduct practical application testing

Current test: In actual circuits or systems, install the connecting piece in the corresponding position and then apply the specified current. By measuring the voltage drop at both ends of the connecting piece, the resistance of the connecting piece is calculated according to Ohm's law, and its conductivity is evaluated. If the voltage drop is within the allowable range, it indicates that the conductivity of the connecting piece can meet the practical application requirements. At the same time, during the current testing process, it is also possible to observe whether there are any abnormal phenomena such as overheating or sparking of the connecting piece. If these phenomena occur, it may indicate poor conductivity or poor contact of the connecting piece.

Signal transmission testing: For connection pieces used for signal transmission, such as RF connection pieces or data transmission line connection pieces in electronic devices, their conductivity can be evaluated by measuring the attenuation, distortion, and other parameters of the signal during transmission by transmitting signals of specific frequencies and amplitudes. If the signal attenuation is too large or the distortion is severe, it indicates that there may be a problem with the conductivity of the connecting piece, which will affect the normal transmission of the signal.