IC ET38 型号ET38 厂商 Extech 分类测试和测量 应用元件测试 产品描述 • Tests for faulty wiring in 3-wire receptacles: Correct, Open Ground, Open Neutral, Open Hot, Hot/ Ground Reverse, and Hot/Neutral Reverse • Standard North American 3-Prong Plug • ET10 also tests GFCI circuits
