First check the fuse to see whether the fuse, and then pull off the horn plug, using a meter measurement in the horn switch when there is electricity.

首先检查保险丝看是否熔断，然后拔下喇叭插头，用万用表测量在按喇叭开关时此处是否有电。

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Turn on the phase meter and touch each plug of the socket;

打开相位计，并碰触插座的每个插孔；

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The three - meter checking device and hydraulic machine were developed to substitute the traditional three - legged divider plug gauge and correction by the thread rod.

设计的三表式检测装置和液压机具取代了传统的三脚规及塞片检测和人工操纵螺杆校正；

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To find the energy hogs, you simply plug each appliance into the meter in turn, and then plug the meter into the wall socket and leave it switched on for a fixed time.

ECONOMIST: The much-talked-of smart grid prepares to enter the home

We can imagine the day when you'll be able to charge the battery on your plug-in hybrid car at night, because your smart meter reminded you that nighttime electricity is cheapest.

WHITEHOUSE: President Obama Explains the Smart Grid and Economic Recovery | The White House