英语语法分析

A picoammeter is an ammeter built along the lines of the ammeter function of an electrometer.

皮安表是安培表的一个门类，其实质上是静电计中安培表功能的延续。

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。

Note that before the capacitor is switched to the picoammeter, the capacitor is connected to circuit LO.

请注意，在电容器被切换至皮安计之前，它是被连接到电路lo的。