一个原因是科技革新使显示，电池和微处理技术大大减少了成本。

One reason is that innovations in display, battery and microprocessing technologies have greatly reduced their cost.

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因此，不会发生对比度的降低等，能够使显示图像的质量提高。

Hence, no decrease in contrast, or the like, occurs, and it is possible to improve the quality of image displayed.

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在电压源即将打开之前，关闭仪器的零点检查功能并使用REL功能抑制电荷读数，使显示为零。

Just before the voltage source is turned on, disable the meter's zero check and suppress the charge reading by using the REL function to zero the display.

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