必须查看本机交流电压选择器之预调状态是否符合本地交流电压。
Selector Setting should be checked to see that it conforms to the local AC supply voltage.
必须查看本机交流电压选择器之预调状态是否符合本地交流电压。
The voltage Selector Setting should be checked to see that it conforms to the local AC supply voltage.
该电路通过对被测电压的判断和量程选择器的控制，实现了在高精度仪表中量程的自动选择。
The circuit, through evaluating the input voltage and controlling the selector of the measuring scale, realizes automatic selection in high precision instrument.
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