Reference source and sample resistance are all thermostatic.

基准源及采样电阻均采用恒温措施。

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As with the four-point collinear probe method, a differential measurement may be required if the sample resistance is of the same magnitude as the isolation (meter common to ground) of the voltmeter.

与四点同线探针法一样，如果样品电阻和电压表的绝缘电阻（电压表的公共端到地）是同一数量级的，就可能需要使用差分测量。

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As shown in Figure 4-45, the resistance can be plotted vs. temperature as the sample temperature is changing.

如图4 - 45所示，可以画出样品温度变化时，其电阻和温度的关系曲线。

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This brief moment is all the time that the sensors inside will have to measure how the sample's electrical resistance changes, so Dr Brooks and his team have their work cut out to get good data.

ECONOMIST: Magnetism