通过使用样品测量管测量受控温度和压力的特定气体(液体)来固定体积。
The volume is fixed by measuring a specific gas (liquid) of controlled temperature and pressure using a sample measurement tube.
由于要测量的电流非常弱，所以用光电倍增管测量光的应用工作通常需要使用皮安计。
Applications such as measuring light with a photomultiplier tube generally require the use of a picoammeter due to the low current levels involved.
源-测量单元还可以测量其它的二极管参数，包括正向电压降和击穿电压。
The Source-Measure Unit can also test other diode parameters, including forward voltage drop and breakdown voltage.
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