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非滿管電磁流量計(jì)
CQTLD/F型非滿管流量計(jì)是一種利用流速-面積法,連續(xù)測(cè)量開放式管線(如半管流污水管道和沒有溢流堰的大流量管道)中流體流量的一種流量自動(dòng)測(cè)量非滿管流量計(jì)。
它能測(cè)量并顯示出瞬時(shí)流量、流速、累積流量等數(shù)據(jù)。
特別適用于市政雨水、廢水、污水的排放和灌溉用水管道等計(jì)量場(chǎng)所的需要。
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工作原理
產(chǎn)品簡(jiǎn)介
CQTLD/F型非滿管流量計(jì)是一種利用流速-面積法,連續(xù)測(cè)量開放式管線(如半管流污水管道和沒有溢流堰的大流量管道)中流體流量的一種流量自動(dòng)測(cè)量非滿管流量計(jì)。它能測(cè)量并顯示出瞬時(shí)流量、流速、累積流量等數(shù)據(jù)。特別適用于市政雨水、廢水、污水的排放和灌溉用水管道等計(jì)量場(chǎng)所的需要。
CQTLD/F型非滿管流量計(jì)是由一個(gè)流速傳感器、一個(gè)水位傳感器和一個(gè)流量顯示儀組成,連續(xù)測(cè)量管道中流體的流速和液位,用戶只要輸入圓形管道的內(nèi)徑或方形管道的寬度,非滿管流量計(jì)就會(huì)自動(dòng)計(jì)算出管道內(nèi)的流量,并自動(dòng)顯示出管道內(nèi)的瞬時(shí)流量、流速、累積流量等測(cè)量參數(shù)。
產(chǎn)品優(yōu)點(diǎn)
可用于開放式非滿管管道流量的測(cè)量;
可應(yīng)用于市政雨水、廢水、污水排放和灌溉用水管道等場(chǎng)所的連續(xù)計(jì)量;
可實(shí)現(xiàn)正向和反向雙向流量測(cè)量;
傳感器可在惡劣的現(xiàn)場(chǎng)和污水水質(zhì)下長(zhǎng)期工作;
流量測(cè)量精度高,而且不受下游、支流擁堵、阻塞等因素的影響;
測(cè)量管道的直管段要求為管道直徑的10倍長(zhǎng)度;
背光源液晶顯示器,不管是強(qiáng)光下還是夜晚都能夠清晰讀取測(cè)量數(shù)據(jù);
非滿管流量計(jì)顯示及輸出功能齊全,可顯示瞬時(shí)流量、流速、累積流量等數(shù)據(jù),并具有計(jì)算機(jī)通訊接口232、485(選配件)
技術(shù)參數(shù)
工作原理
根據(jù)法拉第電磁感應(yīng)原理,在與測(cè)量管軸線和磁力線相垂直的管壁上安裝了一對(duì)檢測(cè)電極,當(dāng)導(dǎo)電液體沿測(cè)量管軸線運(yùn)動(dòng)時(shí),導(dǎo)電液體切割磁力線產(chǎn)生感應(yīng)電勢(shì),此感應(yīng)電勢(shì)由兩個(gè)檢測(cè)電極檢出,數(shù)值大小與流量成正比例,其值為:
E=KBVD
式中:
E-感應(yīng)電勢(shì);
K-與磁場(chǎng)分布及軸向長(zhǎng)度有關(guān)的系數(shù)
B-磁感應(yīng)強(qiáng)度;
V-導(dǎo)電液體平均流速;
D-電極間距;(測(cè)量管內(nèi)直徑)
傳感器將感應(yīng)電勢(shì)E作為流量信號(hào),傳送到轉(zhuǎn)換器,經(jīng)放大,變換濾波用一系列的數(shù)字處理后,用帶背光的點(diǎn)陣式液晶顯示瞬時(shí)流量和累積流量。轉(zhuǎn)換器有4~20mA輸出,報(bào)警輸出及頻率輸出,并設(shè)有RS-485等通訊接口,并支持HART和MODBUS協(xié)議。
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