Use effective value to figure the voltage and the current which ensure higher accuracy. Display in a cycle with prompt to accommodate better content.
电压和电流采用有效值测量，保证数据更准确。采用循环显示及具备提示性显示方式，显示内容多。
The value is not specified in current configuration set. The effective value depend on the inherited configuration set.
代表此值在本设定组不做任何设定。其最终有效值取决于本设定组所继承的设定组。
The value is "cleared" by current configuration set, meaning the parameter will not be in the effective parameter list.
此值在使用本设定组的时候会被清除。因此最终有效值里面不会包含本参数。
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