Regarding measurement of electric contact

Wiring Method Difference

There are several methods for wiring. Each method has both merits and demerits.
Choose a suitable method for your measurement.

Wiring directly to a probe by soldering

Wiring directly to a probe by soldering

  • There are no other components preventing the electrical charge between the wire and the probe.
    ⇒Intrinsic resistance can be kept low in spite of the increased number of contacts.
  • Exchanging probes can take time.
  • A discrepant value of intrinsic resistance can result from different uses methods of working or different way of soldering.

Wiring with a terminal

Wiring with a terminal

  • This method facilitates to exchange probes.
  • There are no surplus components preventing the electrical charge between the wire and the probes.
    ⇒Intrinsic resistance can be kept low in spite of the increased number of contacts.
  • This method can reduce the discrepancy of intrinsic resistance even after exchanging probes.

Wiring to a receptacle by soldering

Wiring to a receptacle by soldering

  • This method facilitates to exchange probes.
  • There is one component (the receptacle), which may affect the electric charge.
    ⇒Intrinsic resistance can vary by the deteriorating fitting position between the probe and the receptacle. This is due to the increasing number of contacts.

Screwed wiring with a ring terminal or a spade terminal

Screwed wiring with a ring terminal or a spade terminal

  • The use of appropriate materials on the terminal can prevent the change of intrinsic resistance even under high current.
  • When using these terminals, it is sometimes difficult to install in a narrow space.

See comparison of contact resistance by different wiring methods.

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