With this connection method, the picoammeter reads a negative current.

采用这种连接方法时, 皮安计读出的电流为负值.

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The picoammeter is commonly a readout because of its high sensitivity.

由于皮安计具有很高的灵敏度,所以通常用作阳极电流的读出装置.

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The basic configuration of the constant - voltage method using electrometer or picoammeter is shown in Figure 2 - 30 a.

使用静电计和皮安计的恒压法的基本电路配置如图 2-30a 所示.

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Usually, this method requires two instruments: a voltage source and a picoammeter or electrometer.

通常, 这种方法需要使用两台仪器: 一台电压源和一台皮安计或静电计.

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The guard terminal of the electrometer ammeter or picoammeter is the LO input terminal.

静电计安培计和皮安计的保护端为LO输入端.

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Thus, the picoammeter reading is 69.99μ A vs . the ideal measurement of 70μ A - an error of only 0.01 %.

所以, 安培计的读数为69.99μA,与理想情况的70μA相比,误差为0.01%.

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