SL-186型電(dian)(dian)火花在線檢測儀金屬表面(mian)絕緣防腐層過薄、漏(lou)鐵及漏(lou)電(dian)(dian)微(wei)孔(kong)處(chu)的電(dian)(dian)阻值和氣(qi)隙密度都很小(xiao)，當有高(gao)壓(ya)經(jing)過時就形成氣(qi)隙擊穿而產(chan)生火花放(fang)電(dian)(dian)，給報(bao)(bao)警電(dian)(dian)路產(chan)生一(yi)(yi)個脈沖信號，報(bao)(bao)警器發出聲光報(bao)(bao)警，根據這(zhe)一(yi)(yi)原理達到防腐層檢漏(lou)目的。
SL-286型(xing)電(dian)火花在線檢(jian)測儀金屬表面絕緣防(fang)腐層(ceng)(ceng)過(guo)薄、漏鐵及漏電(dian)微孔處(chu)的電(dian)阻(zu)值和(he)氣隙密度都很小，當有高壓經(jing)過(guo)時就形成氣隙擊(ji)穿(chuan)而產(chan)(chan)生火花放(fang)電(dian)，給報(bao)警電(dian)路、打標(biao)(biao)電(dian)路和(he)計數電(dian)路各產(chan)(chan)生一個(ge)脈沖信(xin)號，報(bao)警器(qi)發出聲光報(bao)警，打標(biao)(biao)裝置對防(fang)腐層(ceng)(ceng)缺陷處(chu)做上標(biao)(biao)記，計數器(qi)計數一次，根據這一原理(li)達到防(fang)腐層(ceng)(ceng)檢(jian)漏、打標(biao)(biao)并(bing)計數的目的。
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