Figure 4-44 shows a basic superconductor resistance measurement test system using the combination of a Model 2182a Nanovoltmeter and a Model 6220 Current Source for measuring the resistance.

图4 - 44示出一个基本的测量超导体电阻的测试系统。该系统使用2182a型纳伏表和6220型电流源来测量电阻。

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The design method of the instrument is proposed, and the block diagram and controlled current-source as well as techniques for guaranteeing the measurement accuracy are given.

提出了仪器的设计方法，给出了仪器框图、受控电流源、电流控制原理及测量精度的保证措施。

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