Before operating an instrument, make sure the line cord is connected to a properly grounded powerreceptacle.
在操作仪器之前，请确保电源线被连接到具有适当接地的电源插座。
2
An appropriate power plug has to be attached to the machine by electric technicians. Power plug has to be connected to a grounded receptacle.
电源插头应用具有电气专门知识的人来安装。电源插头必须连接到接地插座上。
3
If the power supply wire comes from ceiling, the power supply wire and receptacle should be installed outside 2 meters of supposed installation equipment.