使用通常的万用表,可以简便地鉴别出可控硅的好坏。可控硅在控制极不加触发电压状态时是关断的,所以,如果在可控硅的阳极和阴极之间接一只万用表(用欧姆档),这时不论接那个方向为正,都没有电流通过,指针指向∞。但是,当把万用表(欧姆档)的黑棒(内接电池正极)接触阳极,红棒接触阴极,并移 Using a common multimeter, you can easily identify the quality of the SCR. The thyristor is turned off when the control voltage is not applied to the trigger voltage. Therefore, if a multimeter is connected between the thyristor’s anode and cathode (using an ohmic file), then no matter which direction is taken, it is not. The current passes and the pointer points to ∞. However, when the multimeter (Ohm) black rod (inner battery cathode) contacts the anode, the red rod contacts the cathode and moves