求翻译：电焊机启动后，必须空载运行一段时间。调节焊接电流及极性开关应在空载下进行。直流焊机空载电压不得超过90V，交流焊机空载电压不得超过80V。是什么意思？

null

Electric welder start running after a period of time, it must be empty. Adjust welding current and polarity switch should be empty. DC welding machine load voltage shall not exceed 90 V welding machines, exchange V load voltage shall not exceed 80.

After the electric welding machine starts, must lost motion period of time.The adjustment welding current and the polarity switch should carry on under the idling.The direct-current welding machine idling voltage does not have to surpass 90V, exchanges the welding machine idling voltage not to have

Electric welding machine starts, must be no load running for some time. Regulation of welding current and polarity switch should be carried out under no load. Unloaded voltage DC welding machine should less than 90V, no load voltage not exceeding 80V AC welding machine.

Welding start, you must load operation for some time. Adjust the welding current and polarity switch should be carried out under no load. Welding load voltage not exceeding DC 90V, AC welding machine no-load voltage shall not exceed 80V.