直流毫伏表是针对毫伏级微小信号的精确测量，应用于实验检测、生产检测及维修使用等。

DC millivolt millivolt level table for the accurate measurement of small signals, Used in experimental testing, production testing and maintenance of the use of.

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对直流电流传感信号的检测实验表明，被测电流与检测信号之间存在良好的线性。

The experiment on measuring the direct current by optical method shows a favorable linear relationship between the current and the detective signal.

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因此微弱直流信号的检测意义重大，同时也充满挑战。

So, low level DC signal detection has great importance while full of challenges at the same time.

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