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電(dian)(dian)容式(shi)物(wu)位(wei)計的(de)(de)電(dian)(dian)容檢測元件(jian)是根(gen)據圓(yuan)筒(tong)形電(dian)(dian)容器原理進行工(gong)作的(de)(de)，電(dian)(dian)容器由(you)兩個絕緣的(de)(de)同軸圓(yuan)柱極(ji)(ji)板內電(dian)(dian)極(ji)(ji)和外電(dian)(dian)極(ji)(ji)組成，在(zai)兩筒(tong)之(zhi)間充以介(jie)電(dian)(dian)常(chang)數為(wei)e的(de)(de)電(dian)(dian)解質(zhi)時(shi)，兩圓(yuan)筒(tong)間的(de)(de)電(dian)(dian)容量為(wei)C=2∏eL/lnD/d，式(shi)中L為(wei)兩筒(tong)相互重(zhong)合部(bu)分的(de)(de)長度(du)；D為(wei)外筒(tong)電(dian)(dian)極(ji)(ji)的(de)(de)直(zhi)(zhi)徑；d為(wei)內筒(tong)電(dian)(dian)極(ji)(ji)的(de)(de)直(zhi)(zhi)徑；e為(wei)中間介(jie)質(zhi)的(de)(de)電(dian)(dian)介(jie)常(chang)數。在(zai)實(shi)際測量中D、d、e是基本不變的(de)(de)，故測得C即可知道液位(wei)的(de)(de)高低。

E+H電容(rong)式物位(wei)計一般不受真空、壓(ya)力、溫(wen)度等環境條件的影響。安裝方便、結構牢固、易維修、價格(ge)較(jiao)低。可(ke)以用于液壓(ya)的測員(yuan)和料位(wei)、界面的測量。

    根據(ju)被測介質情況，電(dian)容測量(liang)電(dian)極(ji)的(de)形式可以有很(hen)(hen)多種(zhong)。為保證兩電(dian)極(ji)間的(de)絕緣(yuan)性，測址元件(jian)有不同的(de)結構以適(shi)應不同的(de)測縫條件(jian)。E+H電(dian)容式物位(wei)計(ji)應用中常見(jian)故(gu)障的(de)處理(li)，如果電(dian)容式物位(wei)計(ji)選項正確、安(an)裝合(he)理(li)，一般(ban)很(hen)(hen)少出現故(gu)障，因此選型(xing)和安(an)裝時應注意：

（1）介質的介電(dian)常數應穩定（對于非導電(dian)介質）

（2）對于軟纜型傳(chuan)感器，安裝時需考(kao)慮傳(chuan)感器周圍均衡，應遠(yuan)離爬梯等(deng)

（3）安裝時應遠離設備出入口

（4）同軸型傳感器應防堵

常見(jian)故障有二種(zhong)：

   1、傳感器(qi)漏電(dian)（對于導(dao)電(dian)介質用傳感器(qi)，絕(jue)緣層磨損時會(hui)漏電(dian)）

   2、電(dian)(dian)(dian)(dian)路(lu)損壞。判(pan)定(ding)方法：①用萬用表電(dian)(dian)(dian)(dian)阻擋測(ce)量傳(chuan)(chuan)(chuan)感器(qi)引線與(yu)大地間電(dian)(dian)(dian)(dian)阻，若阻值無(wu)限大，則傳(chuan)(chuan)(chuan)感器(qi)不漏電(dian)(dian)(dian)(dian)；否(fou)則傳(chuan)(chuan)(chuan)感器(qi)漏電(dian)(dian)(dian)(dian)需(xu)更(geng)(geng)換。②將傳(chuan)(chuan)(chuan)感器(qi)斷電(dian)(dian)(dian)(dian)，拆(chai)掉傳(chuan)(chuan)(chuan)感器(qi)引線，通(tong)電(dian)(dian)(dian)(dian)用手觸摸(mo)電(dian)(dian)(dian)(dian)路(lu)傳(chuan)(chuan)(chuan)感器(qi)端子，同時觀(guan)察輸出(chu)電(dian)(dian)(dian)(dian)流：若電(dian)(dian)(dian)(dian)流有變化，則電(dian)(dian)(dian)(dian)路(lu)板(ban)沒(mei)有損壞；否(fou)則電(dian)(dian)(dian)(dian)路(lu)板(ban)損壞，需(xu)更(geng)(geng)換。

   如(ru)果被測介質是導電(dian)的(de)粘滯(zhi)性(xing)介質，當液位下(xia)降時(shi)，由于電(dian)極套管上(shang)仍粘附一(yi)層(ceng)被測介質，因此(ci)會造成虛假的(de)液位指示，在這種情況下(xia)應(ying)定期(qi)清洗(xi)探頭。而在測量(liang)(liang)粘滯(zhi)性(xing)非導電(dian)液體時(shi)，當液位下(xia)降后，光(guang)電(dian)極上(shang)會附上(shang)一(yi)薄層(ceng)介質，但(dan)這不影響儀表的(de)正常(chang)測量(liang)(liang)。

E+H COM253-DX0010
E+H CPS11D-1AA21LAC
E+H CPS11D-1AA21ESA
E+H CPS11D-1AA21GSA
E+H CLS50-A3C3
E+H CLM253-ID0010
E+H CUS31-A2A
E+H CPA450-1F116
E+H CPS11-2BA2ESA
E+H CPM253-PR0005
E+H CPM253-PR8105
E+H CPS11-2AA2ESA
E+H CPM253-PR0105
E+H CPM253-MR0115
E+H CPS11D-7AA21
E+H CPA250-A00
E+H CYK10-A0101

電容式物(wu)位計(ji)最新應用

Liquicap T FMI21 量程:150...2500 mm / 0.5...8.4 ft

電極(ji)種類(lei):桿式

溫(wen)度范(fan)圍:-40...100 °C / -40...212 °F

耐壓:-1...10 bar / ...145 psi

輸(shu)出信(xin)號:4...20 mA

E H電容式物(wu)位計最新(xin)應用 Liquicap T FMI21 的詳細(xi)信息

Liquicap M FMI51 量程:100...4.000 mm / 0.3...13 ft

電極種(zhong)類:桿(gan)式

溫度范圍:-80...200 °C / -112...392 °F

耐(nai)壓:-1...100 bar / -14.5...1450 psi

輸出信號(hao):4...20 mA / HART®, PFM

Liquicap M FMI51 的(de)詳細信息(xi)

Liquicap M FMI52 量程:420...10.000 mm / 1.4...33 ft