The Picoammeter的意思|示意

Figure 4-16 shows a Model 6485 Picoammeter measuring the current from the ion collector, which is operating at ground potential.

图4 - 16示出6485型皮安计从离子收集电极测量电流的情况，这时仪器工作在地电位。

Note the top electrode is guarded, so that only current flowing across the insulator is measured by the picoammeter.

注意，顶部的电极接保护，所以只有流经绝缘体表面的电流才为皮安计所测量。

If this is the case, a simple coaxial vacuum feedthrough can be used to make connections from the collector to the picoammeter.

在这种情况下，可以使用简单的真空同轴接头来进行从收集电极到皮安计的连接。

The voltage across RL1 is the picoammeter voltage burden, normally less than one millivolt, so the resulting current will be quite small.

RL1上的电压为皮安计的输入端压降，通常小于1mV，所以产生的电流是相当小的。

To make the measurement, a constant voltage is applied for a predefined period, usually 60 seconds, and the resulting current is measured with a picoammeter or electrometer.

为了进行测量，在预定的时间(通常为60秒钟)内，给样品施加恒定的电压。然后，用皮安计或静电计测量产生的电流。

Ir measurements often involve multiple conductors, so a switching system is often required to switch the picoammeter and the source to all the conductors in the test circuit.

由于IR测量往往涉及到多芯导线，所以通常需要一套切换系统来将皮安计和源切换至测试电路中的所有导线。