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電(dian)(dian)(dian)(dian)量變(bian)送(song)(song)器(qi)(qi)是一種將被測(ce)量參數(交(jiao)流(liu)電(dian)(dian)(dian)(dian)流(liu)、交(jiao)流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)、有(you)功(gong)功(gong)率(lv)(lv)(lv)、無功(gong)功(gong)率(lv)(lv)(lv)、有(you)功(gong)電(dian)(dian)(dian)(dian)能(neng)(neng)、無功(gong)電(dian)(dian)(dian)(dian)能(neng)(neng)、頻率(lv)(lv)(lv)、相(xiang)位(wei)、功(gong)率(lv)(lv)(lv)因數、直流(liu)電(dian)(dian)(dian)(dian)壓(ya)(ya)、直流(liu)電(dian)(dian)(dian)(dian)流(liu)等(deng))按線(xian)性比例轉換(huan)成直流(liu)電(dian)(dian)(dian)(dian)流(liu)或(huo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(電(dian)(dian)(dian)(dian)能(neng)(neng)脈沖輸(shu)出(chu))的(de)(de)測(ce)量儀表。它廣(guang)泛應用(yong)于(yu)電(dian)(dian)(dian)(dian)力、石油、煤炭(tan)、冶(ye)金、鐵道(dao)、市政(zheng)府等(deng)部(bu)門的(de)(de)電(dian)(dian)(dian)(dian)氣測(ce)量、自(zi)動控制(zhi)以及調度系統(tong)。新型變(bian)送(song)(song)器(qi)(qi)******標(biao)準(zhun)輸(shu)出(chu)的(de)(de)模(mo)擬(ni)信號電(dian)(dian)(dian)(dian)流(liu)值為4～20mA兩線(xian)制(zhi)的(de)(de)環(huan)路在(zai)發送(song)(song)數據以及控制(zhi)那些易于(yu)以這一標(biao)準(zhun)接(jie)受指令的(de)(de)某些執(zhi)行器(qi)(qi)的(de)(de)過程中(zhong)(zhong)有(you)廣(guang)泛的(de)(de)應用(yong)。******上(shang)已(yi)作(zuo)為模(mo)擬(ni)信號中(zhong)(zhong)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)遙測(ce)技術***一標(biao)準(zhun)。在(zai)利用(yong)兩根導線(xian)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)遙測(ce)電(dian)(dian)(dian)(dian)路中(zhong)(zhong)，變(bian)送(song)(song)器(qi)(qi)工作(zuo)電(dian)(dian)(dian)(dian)源與示讀裝置(zhi)，包括傳感器(qi)(qi)工作(zuo)電(dian)(dian)(dian)(dian)源和(he)發送(song)(song)導線(xian)的(de)(de)任何其(qi)它電(dian)(dian)(dian)(dian)阻都是相(xiang)串聯在(zai)環(huan)路內。