接通电源，并接地，开启电源开关。
开启电源，于力量显示器上设定施力值，计时器上设置作用力时间；
Turn on power, setting force value on power display, and time of acting force on counter.
在t1期间，通过半导体闸流管维持一反向电压，并且正是在这之后，设备易于保持一正向电压，而无需开启电源。
During t1 a reverse voltage must be maintained across the thruster and only after this time is the device capable of blocking a forward voltage without going into its on-state.
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