1.調查(cha)(cha)(cha)法(fa)(fa)：回(hui)(hui)顧故(gu)(gu)障(zhang)(zhang)(zhang)發生前的(de)(de)打火、冒(mao)煙、異(yi)味、供電(dian)變(bian)化(hua)、雷(lei)擊(ji)、潮濕、 誤(wu)(wu)操作、誤(wu)(wu)維修。2.直(zhi)觀法(fa)(fa)：觀察回(hui)(hui)路(lu)的(de)(de)外部(bu)損傷(shang)、導(dao)(dao)壓管的(de)(de)泄(xie)漏，回(hui)(hui)路(lu)的(de)(de)過熱，供電(dian)開(kai)關(guan)狀態等。3.檢(jian)(jian)測法(fa)(fa)：1) 斷(duan)(duan)路(lu)檢(jian)(jian)測：將(jiang)(jiang)懷(huai)(huai)疑(yi)(yi)有故(gu)(gu)障(zhang)(zhang)(zhang)的(de)(de)部(bu)分(fen)(fen)(fen)與其它部(bu)分(fen)(fen)(fen)分(fen)(fen)(fen)開(kai)來，查(cha)(cha)(cha)看故(gu)(gu)障(zhang)(zhang)(zhang)是(shi)否(fou)消失(shi)(shi)，如(ru)(ru)果消失(shi)(shi)，則(ze)確(que)定故(gu)(gu)障(zhang)(zhang)(zhang)所在，否(fou)則(ze)可進下步查(cha)(cha)(cha)找(zhao)，如(ru)(ru)：智能(neng)差(cha)壓變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)不能(neng)正常Hart遠程通(tong)訊(xun)，可將(jiang)(jiang)電(dian)源從表體上(shang)斷(duan)(duan)開(kai)，用現場另加電(dian)源的(de)(de)方法(fa)(fa)為變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)通(tong)電(dian)進行通(tong)訊(xun)，以(yi)(yi)查(cha)(cha)(cha)看是(shi)否(fou)電(dian)纜是(shi)否(fou)疊(die)加約(yue)2kHz的(de)(de)電(dian)磁信(xin)號(hao)(hao)而干擾(rao)通(tong)訊(xun)。2) 短(duan)路(lu)檢(jian)(jian)測：在保證安全(quan)的(de)(de)情況下，將(jiang)(jiang)相(xiang)關(guan)部(bu)分(fen)(fen)(fen)回(hui)(hui)路(lu)直(zhi)接(jie)短(duan)接(jie)，如(ru)(ru)：差(cha)變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)輸出(chu)值(zhi)偏(pian)小，可將(jiang)(jiang)導(dao)(dao)壓管斷(duan)(duan)開(kai)，從一次取壓閥外直(zhi)接(jie)將(jiang)(jiang)差(cha)壓信(xin)號(hao)(hao)直(zhi)接(jie)引到差(cha)壓變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)雙側，觀察變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)輸出(chu)，以(yi)(yi)判(pan)斷(duan)(duan)導(dao)(dao)壓管路(lu)的(de)(de)堵、漏的(de)(de)連通(tong)性。3) 替換(huan)檢(jian)(jian)測：將(jiang)(jiang)懷(huai)(huai)疑(yi)(yi)有故(gu)(gu)障(zhang)(zhang)(zhang)的(de)(de)部(bu)分(fen)(fen)(fen)更(geng)換(huan)，判(pan)斷(duan)(duan)故(gu)(gu)障(zhang)(zhang)(zhang)部(bu)位(wei)。如(ru)(ru)：懷(huai)(huai)疑(yi)(yi)變(bian)送(song)(song)(song)器(qi)(qi)(qi)(qi)電(dian)路(lu)板發生故(gu)(gu)障(zhang)(zhang)(zhang)，可臨(lin)時(shi)更(geng)換(huan)一塊，以(yi)(yi)確(que)定原因。4)分(fen)(fen)(fen)部(bu)檢(jian)(jian)測：將(jiang)(jiang)測量回(hui)(hui)路(lu)分(fen)(fen)(fen)割成幾個部(bu)分(fen)(fen)(fen)，如(ru)(ru)：供電(dian)電(dian)源、信(xin)號(hao)(hao)輸出(chu)、信(xin)號(hao)(hao)變(bian)送(song)(song)(song)、信(xin)號(hao)(hao)檢(jian)(jian)測，按分(fen)(fen)(fen)部(bu)分(fen)(fen)(fen)檢(jian)(jian)查(cha)(cha)(cha)，由(you)簡至繁，由(you)表及里，縮小范圍，找(zhao)出(chu)故(gu)(gu)障(zhang)(zhang)(zhang)位(wei)置。
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