对各种电量和电参数的测量。电学量测量是电磁测量的重要内容，广泛用于科学研究和生产等部门。
把电学量传感器测量物理量的范围，平分二段，分别建立拟合回归方程，并用电路实现之。
The measuring range of electric quantity sensor is divided into two parts, the regressive equations are respectively set up and realized it using circuits.
本章对电学量直接测量的理论极限和测量用的仪器作了概述，其中包括了对仪器的介绍和基本仪器电路的介绍。
Section 1 offers an overview of the theoretical limits of DC measurements and the instruments used to make them. It includes instrument descriptions and basic instrument circuit designs.
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