Regarding measurement of electric contact

High Current Application

The key to control heat generation is to know the contact resistance.
The higher contact resistance is, the more heat is generated, and vice versa.
Therefore, a critical issue for a measurement under high current is
“how far the values of the contact resistance can be kept low and stable”.

1.Spring Force : Strengthen as much as possible
Strong force enables the probe tip to penetrate contaminants or the oxide layer on the surface of the target (DUT). This can obtain stable data.


2.Material of the Probe Tip : Use a conductive material for the tip
Conductive materials on the tip can keep intrinsic resistance of the probe low.
It can also lead to low contact resistance.
A recommended material is silver alloy / copper alloy.


3.Tip Shape : Use a serrated tip (having multiple points)
More points can disperse (reduce) the electric current for each point. It results in retarding the heat generation at the contact points.


※These are not always effective for every measurement under high current.

Readings by probing can be different depending on the period of electric charge or measurement circumstances. Wiring methods can vary readings even in the same condition of the measurement.
We suggest you take a trial measurement in advance.