曾經有剛接觸雷達料位計的用戶，第一次使用時測量過程中出現了一些問題，很不解很疑惑。其實很多剛接觸的用戶或許都有這樣的問題，其實不管是高頻雷達料位計，導波雷(lei)達(da)料位計(ji)還(huan)是(shi)(shi)低頻雷(lei)達(da)料位計(ji)，在測(ce)量中出現(xian)問(wen)題都是(shi)(shi)正常現(xian)象(xiang)。用個比喻，人(ren)都會生病，況且是(shi)(shi)儀(yi)表(biao)呢(ni)?出現(xian)問(wen)題，及時找到(dao)原因并(bing)解(jie)決才(cai)是(shi)(shi)最重要的，今(jin)天我們通(tong)過一個導波(bo)雷(lei)達(da)料位計(ji)測(ce)量導電炭黑的案例來一起了解(jie)儀(yi)表(biao)測(ce)量中的問(wen)題和解(jie)決方法。

導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)炭黑(hei)是(shi)具(ju)有(you)低電(dian)(dian)(dian)(dian)阻或(huo)(huo)高電(dian)(dian)(dian)(dian)阻性能的(de)(de)炭黑(hei)，可(ke)(ke)賦予(yu)制(zhi)品導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)或(huo)(huo)防靜(jing)電(dian)(dian)(dian)(dian)作用。其特點為粒徑小，比表面(mian)積大且粗(cu)糙，結構高，表面(mian)潔(jie)凈等(deng)(deng)。炭黑(hei)同碳(tan)黑(hei)，碳(tan)黑(hei)本(ben)身是(shi)半導(dao)(dao)(dao)(dao)(dao)體材料(liao)，導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)碳(tan)黑(hei)具(ju)有(you)較低的(de)(de)電(dian)(dian)(dian)(dian)阻率(lv)，能夠使(shi)橡(xiang)膠或(huo)(huo)塑(su)料(liao)具(ju)有(you)一定的(de)(de)導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性能，用于不同的(de)(de)導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)或(huo)(huo)抗靜(jing)電(dian)(dian)(dian)(dian)制(zhi)品，如抗靜(jing)電(dian)(dian)(dian)(dian)或(huo)(huo)導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)橡(xiang)膠、塑(su)料(liao)制(zhi)品、電(dian)(dian)(dian)(dian)纜料(liao);還可(ke)(ke)以(yi)做干(gan)電(dian)(dian)(dian)(dian)池的(de)(de)原材料(liao)。導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)碳(tan)黑(hei)按其導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性能和制(zhi)造方法(fa)可(ke)(ke)分為：導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)槽黑(hei)、導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)爐法(fa)碳(tan)黑(hei)、超導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)爐法(fa)碳(tan)黑(hei)、特導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)爐法(fa)碳(tan)黑(hei)等(deng)(deng)，乙(yi)炔(gui)碳(tan)黑(hei)也是(shi)導(dao)(dao)(dao)(dao)(dao)電(dian)(dian)(dian)(dian)性能很好的(de)(de)碳(tan)黑(hei)。

某公司用(yong)戶(hu)(hu)需要測量導(dao)電炭(tan)黑，經過了(le)解(jie)，現(xian)(xian)場環境較好，我(wo)們(men)的(de)(de)工程師(shi)建議使(shi)用(yong)我(wo)司導(dao)波(bo)(bo)雷(lei)達料(liao)(liao)位(wei)計HBRD701，采用(yong)接觸式測量，對測量炭(tan)黑的(de)(de)穩定性和精確度(du)具有(you)(you)保障。測量范(fan)圍是1.5米左(zuo)右，使(shi)用(yong)長時(shi)間后(hou)，客(ke)戶(hu)(hu)反饋(kui)出(chu)現(xian)(xian)故障無法自行解(jie)決，明明料(liao)(liao)倉沒(mei)有(you)(you)料(liao)(liao)，但(dan)儀(yi)表顯示卻還有(you)(you)0.5米多的(de)(de)料(liao)(liao)位(wei)高度(du)，于是求助我(wo)們(men)。從客(ke)戶(hu)(hu)發回(hui)波(bo)(bo)曲線顯示距離值可(ke)以看出(chu)，料(liao)(liao)位(wei)是1.5-0.984=0.516米，最(zui)初我(wo)們(men)的(de)(de)售后(hou)工程師(shi)認為現(xian)(xian)場師(shi)傅(fu)安裝調(diao)試出(chu)現(xian)(xian)了(le)問題(ti)，現(xian)(xian)場師(shi)傅(fu)耐心的(de)(de)按照售后(hou)工程師(shi)指(zhi)導(dao)的(de)(de)步驟調(diao)試好儀(yi)表后(hou)，該問題(ti)仍然無法解(jie)決。于是又懷(huai)疑是料(liao)(liao)倉有(you)(you)擋板，造成(cheng)虛假(jia)回(hui)波(bo)(bo)，但(dan)是料(liao)(liao)倉里(li)沒(mei)有(you)(you)障礙物，最(zui)終這個懷(huai)疑也被排除了(le)。經過售后(hou)工程師(shi)數次的(de)(de)測試分析，發現(xian)(xian)是下面磁場太強，導(dao)波(bo)(bo)桿被磁化(hua)了(le)，造成(cheng)這個問題(ti)的(de)(de)出(chu)現(xian)(xian)，隨(sui)后(hou)寄(ji)了(le)一根1.5米的(de)(de)桿，安裝好后(hou)，問題(ti)得到解(jie)決，測量正(zheng)常。

通(tong)過這個案例我(wo)們也可以清楚(chu)的(de)發現(xian)，導波桿會被(bei)磁場影響，有這方面問題的(de)用戶可以參(can)考。另(ling)外專業(ye)工程(cheng)師在(zai)查找問題時是(shi)不斷摸索排除的(de)，任(ren)何事情都不是(shi)一蹴而就的(de)。這次(ci)測量(liang)(liang)導電炭黑是(shi)這樣，下次(ci)測量(liang)(liang)其(qi)他介質，面對其(qi)他工況(kuang)時也是(shi)這樣。