電(dian)(dian)磁流量(liang)計(ji)如果測(ce)量(liang)的(de)(de)介質(zhi)長期比較污濁，那么電(dian)(dian)磁流量(liang)計(ji)在工作(zuo)一段時(shi)(shi)間后，電(dian)(dian)極(ji)(ji)上九會(hui)(hui)產生結(jie)垢。當結(jie)垢物質(zhi)的(de)(de)電(dian)(dian)導率(lv)和(he)被測(ce)介質(zhi)的(de)(de)電(dian)(dian)導率(lv)不同時(shi)(shi)，就(jiu)會(hui)(hui)帶(dai)來丈量(liang)誤差。污泥、油污對電(dian)(dian)極(ji)(ji)的(de)(de)附著，也會(hui)(hui)使儀(yi)表輸出發生擺動和(he)漂移。因此，在這種(zhong)情況下我們(men)就(jiu)需(xu)要定(ding)期對電(dian)(dian)磁流量(liang)計(ji)電(dian)(dian)極(ji)(ji)進行維護與(yu)清(qing)洗。 

1、對無機物污(wu)染,可將(jiang)電極浸入(ru)0.1mol/L中30分鐘(zhong),用純水清(qing)洗,再浸入(ru)3.5MOL/L溶液(ye)中浸泡6小時(shi)后使用。 

2、4%氟化氫溶(rong)液中浸(jin)3～5s，取出用蒸餾(liu)水(shui)(shui)沖洗，然后在0.1mol/L的鹽酸溶(rong)液中浸(jin)泡數(shu)小(xiao)時，用蒸餾(liu)水(shui)(shui)沖洗干凈，標定。 

3、鉑金(jin)(jin)表面污(wu)染(ran)嚴重(zhong)形成氧化膜,可(ke)用(yong)牙膏對鉑或(huo)金(jin)(jin)表面進行拋(pao)光,然后(hou)用(yong)純水清洗，再浸(jin)入3.5MOL/L溶液中浸(jin)泡6小(xiao)時后(hou)使用(yong)。 

4、對有機油污(wu)和油膜污(wu)染,可用洗(xi)(xi)滌(di)劑清洗(xi)(xi)鉑或金(jin)表(biao)面(mian)后用純水(shui)清洗(xi)(xi),再浸入3.5MOL/L溶液中浸泡(pao)6小時后用。 

電磁流量計(ji)電極清洗方法有以(yi)下(xia)幾種(zhong)： 

1.電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化(hua)學(xue)方法 金屬(shu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解質(zhi)流(liu)體(ti)中存(cun)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化(hua)學(xue)現(xian)象。根據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化(hua)學(xue)原(yuan)理，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)與流(liu)體(ti)存(cun)在(zai)界面(mian)(mian)(mian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)與流(liu)體(ti)的(de)界面(mian)(mian)(mian)是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)/流(liu)體(ti)相間存(cun)在(zai)的(de)雙電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)層(ceng)所引(yin)起(qi)的(de)。對于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)與流(liu)體(ti)界面(mian)(mian)(mian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)場的(de)研(yan)究(jiu)發現(xian)物(wu)質(zhi)的(de)分子(zi)(zi)(zi)、原(yuan)子(zi)(zi)(zi)或(huo)離(li)子(zi)(zi)(zi)在(zai)界面(mian)(mian)(mian)具有(you)富(fu)集或(huo)貧(pin)乏的(de)吸附現(xian)象，而(er)且(qie)發現(xian)大(da)多數無(wu)機陰(yin)離(li)子(zi)(zi)(zi)是(shi)表(biao)面(mian)(mian)(mian)活性物(wu)質(zhi)，具有(you)典型的(de)離(li)子(zi)(zi)(zi)吸附規律，而(er)無(wu)機陽離(li)子(zi)(zi)(zi)的(de)表(biao)面(mian)(mian)(mian)活性很(hen)小。因(yin)此電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化(hua)學(xue)清(qing)洗電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)僅考慮陰(yin)離(li)子(zi)(zi)(zi)吸附的(de)情況。陰(yin)離(li)子(zi)(zi)(zi)的(de)吸附與電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)有(you)密切關系，吸附主要發生(sheng)在(zai)比零電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)更正的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)位(wei)范圍，即帶異號(hao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)表(biao)面(mian)(mian)(mian)。在(zai)同號(hao)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)極(ji)表(biao)面(mian)(mian)(mian)上，當剩余電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)荷(he)密度稍大(da)時，靜電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)斥力大(da)于吸附作用(yong)力，陰(yin)離(li)子(zi)(zi)(zi)很(hen)快就脫(tuo)附了，這就是(shi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)化(hua)學(xue)清(qing)洗的(de)原(yuan)理。 

2.機(ji)械(xie)(xie)清除(chu)(chu)法(fa) 機(ji)械(xie)(xie)清除(chu)(chu)法(fa)是(shi)通過在電(dian)(dian)(dian)(dian)磁流(liu)(liu)量計(ji)(ji)電(dian)(dian)(dian)(dian)極(ji)上安(an)裝(zhuang)特殊的(de)機(ji)械(xie)(xie)結(jie)構來實現電(dian)(dian)(dian)(dian)極(ji)清除(chu)(chu)。目前有(you)(you)兩種形(xing)式：一(yi)種是(shi)采用(yong)機(ji)械(xie)(xie)刮(gua)除(chu)(chu)器(qi)。用(yong)不(bu)銹鋼(gang)制成一(yi)把帶(dai)有(you)(you)細(xi)軸(zhou)(zhou)的(de)刮(gua)刀(dao)，通過空(kong)心電(dian)(dian)(dian)(dian)極(ji)把刮(gua)刀(dao)引出(chu)，細(xi)軸(zhou)(zhou)和空(kong)心電(dian)(dian)(dian)(dian)極(ji)之間采用(yong)機(ji)械(xie)(xie)密封以防止(zhi)介(jie)質外流(liu)(liu)，于是(shi)組成了(le)機(ji)械(xie)(xie)刮(gua)除(chu)(chu)器(qi)。當從外面轉(zhuan)(zhuan)動(dong)(dong)細(xi)軸(zhou)(zhou)時候，刮(gua)刀(dao)緊(jin)貼電(dian)(dian)(dian)(dian)平(ping)面轉(zhuan)(zhuan)動(dong)(dong)，刮(gua)除(chu)(chu)污(wu)(wu)垢。這種刮(gua)除(chu)(chu)器(qi)可以手動(dong)(dong)，也可以用(yong)馬達驅(qu)動(dong)(dong)細(xi)軸(zhou)(zhou)自動(dong)(dong)刮(gua)除(chu)(chu)。國產電(dian)(dian)(dian)(dian)磁流(liu)(liu)量計(ji)(ji)中西安(an)云儀的(de)刮(gua)刀(dao)型電(dian)(dian)(dian)(dian)磁流(liu)(liu)量計(ji)(ji)就有(you)(you)這樣(yang)的(de)性(xing)能(neng)，而且性(xing)能(neng)穩定，操作方便。另一(yi)種是(shi)在管狀(zhuang)電(dian)(dian)(dian)(dian)極(ji)中，裝(zhuang)上清除(chu)(chu)污(wu)(wu)垢用(yong)的(de)鋼(gang)絲(si)刷，軸(zhou)(zhou)裹在密封的(de)“O"形(xing)圈里，以防止(zhi)流(liu)(liu)體泄(xie)露。這種清洗裝(zhuang)置需要有(you)(you)人經常(chang)拉動(dong)(dong)鋼(gang)絲(si)刷來清洗電(dian)(dian)(dian)(dian)極(ji)，操作起來不(bu)是(shi)很(hen)方便，沒(mei)有(you)(you)西安(an)云儀的(de)刮(gua)刀(dao)型電(dian)(dian)(dian)(dian)磁流(liu)(liu)量計(ji)(ji)方便。 

3.超聲(sheng)(sheng)波(bo)清(qing)洗(xi)方法 將超聲(sheng)(sheng)波(bo)發生器產生的(de)(de)45~65kHz的(de)(de)超聲(sheng)(sheng)波(bo)電壓加到(dao)電極(ji)上，使超聲(sheng)(sheng)波(bo)的(de)(de)能量集中在電極(ji)與介(jie)質接觸面(mian)上，從而利用超聲(sheng)(sheng)波(bo)的(de)(de)能力將污垢擊碎(sui)，達(da)到(dao)清(qing)洗(xi)的(de)(de)目的(de)(de)。 

4.電(dian)擊穿法(fa) 這種方法(fa)使用交流(liu)高壓電(dian)定期加(jia)到電(dian)極(ji)和介質之間，一般加(jia)30~100V。由(you)于電(dian)極(ji)被附(fu)著，其表面接觸電(dian)阻(zu)變大，所加(jia)電(dian)壓幾乎集中在(zai)附(fu)著物(wu)上，高電(dian)壓會將(jiang)附(fu)著物(wu)擊穿，然后被流(liu)體(ti)沖走(zou)。總安(an)全(quan)出(chu)發，使用電(dian)擊穿法(fa)必須是在(zai)流(liu)量計中斷丈量、傳感器與轉換器間信(xin)號(hao)線(xian)斷開(kai)、停(ting)電(dian)情況(kuang)下將(jiang)交流(liu)高壓電(dian)直(zhi)接在(zai)傳感器信(xin)號(hao)輸(shu)出(chu)端(duan)子上進行清洗。 

以上(shang)(shang)介紹了幾種(zhong)電(dian)(dian)(dian)(dian)(dian)磁(ci)流(liu)量(liang)計電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)的(de)維護和清(qing)洗方法，其(qi)(qi)實如果我(wo)們(men)在(zai)(zai)前期選(xuan)型(xing)的(de)時候能充分考慮到以后測量(liang)介質會對(dui)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)產(chan)生污(wu)染(ran)，那么就應該選(xuan)擇刮(gua)(gua)(gua)(gua)刀(dao)型(xing)電(dian)(dian)(dian)(dian)(dian)磁(ci)流(liu)量(liang)計，可以很方便(bian)的(de)對(dui)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)進行維護和清(qing)洗，省去很多麻煩。電(dian)(dian)(dian)(dian)(dian)磁(ci)流(liu)量(liang)計，是由(you)顯示儀表、殼體(ti)、上(shang)(shang)線圈(quan)、下線圈(quan)、電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)組件等組成，其(qi)(qi)中(zhong)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)組件為(wei)可拆卸刮(gua)(gua)(gua)(gua)刀(dao)式電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)結構(gou)，這種(zhong)結構(gou)是將(jiang)信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)穿套在(zai)(zai)帶(dai)刮(gua)(gua)(gua)(gua)刀(dao)的(de)刮(gua)(gua)(gua)(gua)刀(dao)桿上(shang)(shang)，通(tong)(tong)過(guo)壓緊(jin)螺母將(jiang)信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)和刮(gua)(gua)(gua)(gua)刀(dao)桿固定(ding)在(zai)(zai)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)杯(bei)中(zhong)，電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)杯(bei)焊固在(zai)(zai)內表體(ti)上(shang)(shang)，信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)與(yu)內表體(ti)、電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)杯(bei)、壓緊(jin)螺母間(jian)通(tong)(tong)過(guo)絕緣材料隔開;當信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)需要維護和保養(yang)時，只(zhi)需打開封(feng)蓋，用手(shou)轉(zhuan)動手(shou)柄，帶(dai)動刮(gua)(gua)(gua)(gua)刀(dao)桿旋(xuan)轉(zhuan)，使(shi)緊(jin)貼信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)的(de)刮(gua)(gua)(gua)(gua)刀(dao)刮(gua)(gua)(gua)(gua)去信(xin)(xin)(xin)號(hao)(hao)(hao)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)(ji)表面上(shang)(shang)的(de)污(wu)垢(gou)，清(qing)理后將(jiang)刮(gua)(gua)(gua)(gua)刀(dao)的(de)方向(xiang)旋(xuan)至與(yu)流(liu)體(ti)流(liu)動的(de)方向(xiang)(旋(xuan)鈕上(shang)(shang)有方向(xiang)標志)，操作非常(chang)的(de)方便(bian)。