为使电流测量时的电介质吸收影响减到最小，用来做对极小的电流测量的绝缘体，应避免施加大于数伏的电压。
To minimize the effects of dielectric absorption on current measurements, avoid applying voltages greater than a few volts to insulators being used for sensitive current measurements.
当测得的电流值或 测得的电荷值大于参考值时，根据控制器（24）发出的指令终止所述 测量；
When the measured current value or the measured charge value is greater than a reference value, the measurement is terminated by an instruction from the controller (24).
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