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铁路信号施工中，常常需要到已开通使用的信号楼内查线摸底，以便过渡使用或临时结合。传统的校线方法有2种：①利用电表的欧姆挡的电阻法测量；②利用等电位的电压法测量。这2种方法都有不足之处，电阻法测量虽然直观，但不慎封连电源会烧熔断器，顶信号，造成事故；设备在运
During the construction of railway signals, it is often necessary to check the lines in the signals that have been opened and used for transitional use or temporary bonding. There are two traditional methods of school alignment: ① meter Ohm block resistance measurement; ② the use of voltage measurement of the potential. These two methods have shortcomings, although the resistance measurement is intuitive, but accidentally seal the power supply will burn the fuse, the top signal, resulting in accidents; equipment shipped