使测试夹具稳定。牢靠地固定或绑扎电子元件、导线和电缆。屏蔽应当牢靠、完善。

Stabilization of the test hookup. Securely mount or tie down electronic components, wires, and cables. Shielding should be sturdy.

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通过键盘可设置：功率、测试时长、记录周期、电压下限、电压上限、导线内阻、操作模式、日期、时间等参数。

Power, test time, record period, voltage lower limit, voltage upper limit, lead internal resistance, operation model, data and time parameter can be set with keyboard.

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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。

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.

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