現場の計器の測定端子に電圧はあるが電流がない、これはなぜでしょうか？現場の送信機の故障は除外されました。
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アナログ値。セーフガードのダイオード設定について説明してください！
回路は接続されておらず、測定された電圧は端子電圧で、電流はゼロです。
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