The L1 terminal that carries power supply respectively and N terminal undertake metrical to disturbing noise, but when switch measures circuit, may produce high-pressured instant pulse.
英
美
- 分袂经由过程电源的L1端子和N端子对干扰噪声进行测量,但在切换测量线路时,可能会发生高压瞬间脉冲。