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壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)比較簡單，一般客戶都知道怎么接(jie)(jie)(jie)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，一根(gen)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)連(lian)接(jie)(jie)(jie)電(dian)(dian)源(yuan)(yuan)正極(ji)，另一個線(xian)(xian)(xian)(xian)(xian)(xian)(xian)也就是(shi)(shi)信(xin)(xin)號線(xian)(xian)(xian)(xian)(xian)(xian)(xian)經(jing)過(guo)儀(yi)器(qi)連(lian)接(jie)(jie)(jie)到電(dian)(dian)源(yuan)(yuan)負極(ji)，這(zhe)種是(shi)(shi)的(de)(de)(de)，壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)三(san)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)是(shi)(shi)在兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)基(ji)礎上加了一個線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，這(zhe)根(gen)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)直接(jie)(jie)(jie)連(lian)接(jie)(jie)(jie)到電(dian)(dian)源(yuan)(yuan)的(de)(de)(de)負極(ji)，較兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)麻煩(fan)一點(dian)。四(si)(si)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)肯定是(shi)(shi)兩個電(dian)(dian)源(yuan)(yuan)輸(shu)(shu)入(ru)端，另外兩個是(shi)(shi)信(xin)(xin)號輸(shu)(shu)出端。四(si)(si)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)多半是(shi)(shi)電(dian)(dian)壓(ya)輸(shu)(shu)出而(er)不是(shi)(shi)4~20mA輸(shu)(shu)出，4~20mA的(de)(de)(de)叫壓(ya)力變(bian)送(song)器(qi)，多數做成兩線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)。壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)的(de)(de)(de)信(xin)(xin)號輸(shu)(shu)出有(you)些(xie)是(shi)(shi)沒有(you)經(jing)過(guo)放大的(de)(de)(de)，滿量程輸(shu)(shu)出只(zhi)有(you)幾十毫伏，而(er)有(you)些(xie)壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)在內部有(you)放大電(dian)(dian)路，滿量程輸(shu)(shu)出為0~2V。至(zhi)于怎么接(jie)(jie)(jie)到顯示儀(yi)表(biao)，要看儀(yi)表(biao)的(de)(de)(de)量程是(shi)(shi)多大，如(ru)果(guo)有(you)和輸(shu)(shu)出信(xin)(xin)號相適應的(de)(de)(de)檔(dang)位，就可以直接(jie)(jie)(jie)測量，否則要加信(xin)(xin)號調整電(dian)(dian)路。五(wu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)壓(ya)力傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)與四(si)(si)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)相差不大，市面上五(wu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)制(zhi)的(de)(de)(de)傳(chuan)(chuan)(chuan)感(gan)(gan)(gan)器(qi)也比較少。

HYDAC賀德克壓力傳感器常見故(gu)障(zhang)

一、 壓(ya)力傳(chuan)感器的密封圈問題

當(dang)壓(ya)(ya)(ya)力(li)(li)(li)(li)傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)第一(yi)次(ci)(ci)加壓(ya)(ya)(ya)時，變(bian)送器(qi)(qi)(qi)的(de)輸出沒有改變(bian)。當(dang)壓(ya)(ya)(ya)力(li)(li)(li)(li)傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)再次(ci)(ci)加壓(ya)(ya)(ya)時，變(bian)送器(qi)(qi)(qi)輸出突然變(bian)化，泄壓(ya)(ya)(ya)后變(bian)送器(qi)(qi)(qi)零位不能返回。問(wen)題很(hen)可能是壓(ya)(ya)(ya)力(li)(li)(li)(li)傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)的(de)密(mi)封(feng)(feng)圈。常見的(de)情況是由于密(mi)封(feng)(feng)圈的(de)尺寸。擰緊傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)后，密(mi)封(feng)(feng)圈被(bei)壓(ya)(ya)(ya)縮到傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)的(de)壓(ya)(ya)(ya)力(li)(li)(li)(li)端口中，從而阻塞傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)。加壓(ya)(ya)(ya)時，壓(ya)(ya)(ya)力(li)(li)(li)(li)介質無法進入(ru)，但當(dang)壓(ya)(ya)(ya)力(li)(li)(li)(li)較高時，密(mi)封(feng)(feng)圈突然爆裂，賀德克壓(ya)(ya)(ya)力(li)(li)(li)(li)傳(chuan)(chuan)(chuan)(chuan)感器(qi)(qi)(qi)因壓(ya)(ya)(ya)力(li)(li)(li)(li)而發生變(bian)化。消除這類故障的(de)方法是(shi)拆(chai)除傳感器(qi)，直接檢查零位是(shi)否正(zheng)常(chang)。如(ru)果零位正(zheng)常(chang)，則更換(huan)密封圈并重試(shi)。

二、壓力會上升(sheng)(sheng)，變送器輸出不上升(sheng)(sheng)

在這種情況下，首先(xian)要檢(jian)查(cha)(cha)壓(ya)力接口是(shi)否(fou)(fou)有泄漏或(huo)堵(du)塞，如(ru)果(guo)沒(mei)(mei)有，檢(jian)查(cha)(cha)接線方(fang)式是(shi)否(fou)(fou)錯誤并檢(jian)查(cha)(cha)電源(yuan)(yuan)，如(ru)果(guo)電源(yuan)(yuan)正常(chang)，只需(xu)加(jia)壓(ya)看看輸(shu)出是(shi)否(fou)(fou)有變化，或(huo)者檢(jian)查(cha)(cha)傳感器(qi)的零位是(shi)否(fou)(fou)有輸(shu)出，如(ru)果(guo)沒(mei)(mei)有，則(ze)說明(ming)傳感器(qi)損(sun)(sun)壞(huai)，否(fou)(fou)則(ze)說明(ming)儀器(qi)損(sun)(sun)壞(huai)或(huo)整個系統(tong)的其(qi)他部件(jian)損(sun)(sun)壞(huai)。

三、發射機(ji)輸出信號不穩定。

這種故障肯定是(shi)壓力(li)源(yuan)的問題(ti)。壓力(li)源(yuan)本身是(shi)不穩定的壓力(li)。可(ke)能是(shi)儀表或壓力(li)傳(chuan)感器抗力(li)不強，傳(chuan)感器本身振動嚴重(zhong)或傳(chuan)感器損壞。

四、變送器與指針式壓力(li)表的偏差(cha)較大

這(zhe)種偏差(cha)(cha)是正常的(de)(de)，只需確認正常的(de)(de)偏差(cha)(cha)范圍；后(hou)故障是微(wei)差(cha)(cha)壓變送器(qi)的(de)(de)安裝位(wei)置對(dui)零輸出的(de)(de)影響。由于(yu)微(wei)差(cha)(cha)壓變送器(qi)量程小(xiao)，變送器(qi)中的(de)(de)傳感器(qi)元件會影響微(wei)差(cha)(cha)壓變送器(qi)的(de)(de)輸出。安裝時，變送器(qi)壓力(li)敏感部分的(de)(de)軸向應與(yu)重力(li)方向垂直90度。安裝固定后(hou)，切記將變送器(qi)的(de)(de)零位(wei)調整到(dao)標準值(zhi)。

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