It is mainly affected by contact material, positive pressure, surface state, use voltage and current and other factors. Contact material Electrical connector Technical conditions For different materials made of the same specifications for the insertion of contact parts, the provision of different contact resistance assessment indicators. For example, the general specification for small circular fa
Contact resistance tester is intelligent, wide range, high precision resistance tester, suitable for transformers And inductor copper resistance, relay contact resistance, switch connector contact resistance, wire resistance, component solder joint contact resistance, printed board line and welding hole resistance, etc., widely used in electronic product production line detection. Basic accuracy: 0.02%±2 words Range mode: Automatic or manual locking Test speed: 5 times/slow, 10 times/fast Test range: 1µΩ - 2MΩ nine stops Test current: 100µA-1A Sorting function :LOW,PASS,HIGH judgment and buzzer sound Test end: five-core aviation socket Operating temperature, humidity: 0--40℃ 0-- 85%RH Working power supply: 200VAC-- 240VAC 50-60Hz Machine size \ weight: 280mm(W) × 89mm(H) × 280mm(D) / 1.5Kg
Resistance between conductors The resistance between conductors in contact is called contact resistance. Generally, the contact resistance is required to be below 10-20 mΩ. Some switches require less than 0.1-0.5Ω. Some circuits are sensitive to changes in contact resistance. It should be noted that the contact resistance of the switch is the maximum allowed contact resistance of the switch in a number of contacts. On the circuit board, it refers to the contact point between the gold finger and the connector, and the resistance presented when the current passes through is called. In order to reduce the formation of metal surface oxides, usually the positive gold finger part, and the negative card clip of the connector need to be plated with metal to suppress the occurrence of its "load resistance". The plug of other electrical products is squeezed into the socket, or the contact resistance exists between the guide pin and its connector
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