2. Methods for determining resistivity

2.1 Standard methods

Resistivity determination is described in detail in standard IEC 60468 Method for measuring the resistivity of metallic materials, published in 1974 by the IEC International Electrotechnical Commission. It specifies that the method is to be used for metallic materials and also for copper, aluminum and all other metals and alloys used as electrical conductors. The measurement spectrum is very broad, extending from 1 μΩ · cm to 200 μΩ · cm.

Two measurement methods are described:

• one called "current";

• the other called "reference".

The principle of measurement is based on comparing the resistance of a linear sample with a standard...