1、電(dian)纜(lan)故障(zhang)定點儀由(you)電(dian)磁波(bo)傳感器，聲(sheng)波(bo)振動(dong)傳感器，數據處理器，LED距離顯(xian)示器及音頻(pin)放大(da)器五大(da)部分組(zu)成。

2、在(zai)進行(xing)沖擊(ji)高壓放(fang)電(dian)(dian)(dian)(dian)定點(dian)時(shi)，電(dian)(dian)(dian)(dian)磁傳(chuan)(chuan)感器接收到由(you)電(dian)(dian)(dian)(dian)纜(lan)輻射傳(chuan)(chuan)來(lai)的(de)(de)電(dian)(dian)(dian)(dian)磁波(bo)后，送至數(shu)據處理(li)器，經放(fang)大(da)整形處理(li)，啟(qi)動內部的(de)(de)距(ju)離(li)(li)(li)換算(suan)電(dian)(dian)(dian)(dian)路(lu)(lu)工作。當拾(shi)音傳(chuan)(chuan)感器接收到由(you)地(di)下(xia)傳(chuan)(chuan)來(lai)的(de)(de)故(gu)障點(dian)地(di)震波(bo)后也送至數(shu)據處理(li)器放(fang)大(da)整形，產生計(ji)數(shu)中斷信號，讓距(ju)離(li)(li)(li)顯示(shi)器顯示(shi)最終處理(li)結果 (故(gu)障距(ju)離(li)(li)(li)數(shu))。并(bing)凍結顯示(shi)數(shu)字(zi)，提供穩(wen)定觀察。第二次(ci)沖擊(ji)放(fang)電(dian)(dian)(dian)(dian)時(shi)重復上述過程并(bing)刷新上次(ci)顯示(shi)數(shu)據。由(you)于電(dian)(dian)(dian)(dian)磁波(bo)傳(chuan)(chuan)播(bo)(bo)速度(du)極快，遠高于地(di)表聲波(bo)傳(chuan)(chuan)播(bo)(bo)速度(du)，根據電(dian)(dian)(dian)(dian)磁波(bo)與聲波(bo)的(de)(de)傳(chuan)(chuan)播(bo)(bo)時(shi)間(jian)差，利用(yong)公式I=TV (I：距(ju)離(li)(li)(li)，單(dan)位(wei)米； T：時(shi)間(jian)差單(dan)位(wei)秒； V：聲波(bo)在(zai)地(di)表層(ceng)或電(dian)(dian)(dian)(dian)纜(lan)中的(de)(de)傳(chuan)(chuan)播(bo)(bo)速度(du)，XXX米/秒)，由(you)數(shu)據處理(li)電(dian)(dian)(dian)(dian)路(lu)(lu)換算(suan)出故(gu)障距(ju)離(li)(li)(li)來(lai)。

3、音(yin)頻放大(da)器可放大(da)拾音(yin)傳感器拾取(qu)的微(wei)弱地(di)震(zhen)波信號(hao)，由耳機監聽其(qi)(qi)大(da)小，配合顯(xian)示屏數據精確(que)定(ding)點。如果地(di)震(zhen)波太(tai)弱，形不(bu)成計數中斷(duan)(duan)信號(hao)，距離顯(xian)示器將自動發(fa)出(chu)中斷(duan)(duan)信號(hao)使其(qi)(qi)滿亮顯(xian)示99.9米(mi)。