液位控製儀表故障分析

　　（1）液位控製儀表(biao)係(xi)統(tong)指(zhi)示(shi)值(zhi)變(bian)化(hua)到(dao)最(zui)大(da)或(huo)最(zui)小(xiao)時(shi)，可(ke)以(yi)先(xian)檢(jian)查(zha)檢(jian)測(ce)儀(yi)表(biao)看(kan)是(shi)否(fou)正(zheng)常(chang)，如(ru)指(zhi)示(shi)正(zheng)常(chang)，將(jiang)液(ye)位(wei)控(kong)製(zhi)改(gai)為(wei)手(shou)動(dong)遙(yao)控(kong)液(ye)位(wei)
，看(kan)液(ye)位(wei)變(bian)化(hua)情(qing)況(kuang)。如(ru)液(ye)位(wei)可(ke)以(yi)穩(wen)定(ding)在(zai)一(yi)定(ding)的(de)範(fan)圍(wei)，則(ze)故(gu)障(zhang)在(zai)液(ye)位(wei)控(kong)製(zhi)係(xi)統(tong)；如穩不住液位，一般為工藝係統造成的故障，要從工藝方麵查找原因。
    （2）差壓式液位控製儀表biao指zhi示shi和he現xian場chang直zhi讀du式shi指zhi示shi儀yi表biao指zhi示shi對dui不bu上shang時shi，首shou先xian檢jian查zha現xian場chang直zhi讀du式shi指zhi示shi儀yi表biao是shi否fou正zheng常chang

，如ru指zhi示shi正zheng常chang，檢jian查zha差cha壓ya式shi液ye位wei儀yi表biao的de負fu壓ya導dao壓ya管guan封feng液ye是shi否fou有you滲shen漏lou
；若有滲漏
，重新灌封液，調零點；無滲漏
，可能是儀表的負遷移量不對了，重新調整遷移量使儀表指示正常。 
    （3）液(ye)位(wei)控(kong)製(zhi)儀(yi)表(biao)係(xi)統(tong)指(zhi)示(shi)值(zhi)變(bian)化(hua)波(bo)動(dong)頻(pin)繁(fan)時(shi)，首(shou)先(xian)要(yao)分(fen)析(xi)液(ye)麵(mian)控(kong)製(zhi)對(dui)象(xiang)的(de)容(rong)量(liang)大(da)小(xiao)
，來(lai)分(fen)析(xi)故(gu)障(zhang)的(de)原(yuan)因(yin)，容(rong)量(liang)大(da)一(yi)般(ban)是(shi)儀(yi)表(biao)故(gu)障(zhang)造(zao)成(cheng)。容(rong)量(liang)小(xiao)的(de)首(shou)先(xian)要(yao)分(fen)析(xi)工(gong)藝(yi)操(cao)作(zuo)情(qing)況(kuang)是(shi)否(fou)有(you)變(bian)化(hua)
，如(ru)有(you)變(bian)化(hua)很(hen)可(ke)能(neng)是(shi)工(gong)藝(yi)造(zao)成(cheng)的(de)波(bo)動(dong)頻(pin)繁(fan)。如(ru)沒(mei)有(you)變(bian)化(hua)可(ke)能(neng)是(shi)儀(yi)表(biao)故(gu)障(zhang)造(zao)成(cheng)。