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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上海高精度流量計廠家,流量計</p><p><span>***更新：</span>2021-01-19 07:11:33</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qfhe3o2" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">南儀測控技術(shù)(上海)有限公司</a></p><p><span>聯(lián)系人：</span>桂經(jīng)理</p><p><span>郵箱: </span>704766500@qq.com</p><p><span>電話: </span>17802114401</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>https://www.nanicontrol.com</p><p><span>手機(jī): </span>021-61559357</p><p><span>地址: </span>滬閔路1871號9甲幢4樓407室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="cbyvcjq" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="xmjgifh" class="box"><p><p style="text-indent:25px">電磁流量計電極四氟襯里加工工藝方法：電磁流量計測量中，電解質(zhì)流動體對金屬電極的電化學(xué)反應(yīng)會產(chǎn)生直流動極化電壓。這種與流動速無關(guān)的電壓被稱為流動體噪聲。流動體噪聲一直是電磁流量計要解決的重要技術(shù)問題之一,從1832年法拉第*次應(yīng)用地磁場和電磁感應(yīng)方法測量泰晤士河流動速，到現(xiàn)在人們普遍地應(yīng)用電磁流量計測量導(dǎo)電液體流量，上海高精度流量計廠家，電磁流量計的流動體噪聲問題一直是一個困擾。尤其在進(jìn)入低頻矩形波勵磁時代以來，流動體噪聲的影響表現(xiàn)得更為突出。往往有些新裝配的流量計受電極極化的影響，輸出擺動需要經(jīng)過長時間在水中浸泡才能消除。流動體噪聲的較大小直接影響到流量計測量的靈敏度、線性度和穩(wěn)定性，上海高精度流量計廠家，因此如何深入研究流動體噪聲，探尋其產(chǎn)生的原因，找到降低流動體噪聲的方法，提高傳感器信噪比，上海高精度流量計廠家，特別是對微弱勵磁電流動（電磁水表、兩線制電磁流量計）的發(fā)展和低流動速（0.1m/s以較）及高流動速（15m/s以上）流量測量范圍的擴(kuò)展具有重較大意義。流體噪聲一直是電磁流量計要解決的重要技術(shù)問題之一。上海高精度流量計廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海高精度流量計廠家,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142465523533/8497638.png"></div><p style="text-indent:25px">電磁流量計的傳感器檢查方法與維護(hù)技巧：電磁流量計作為一種在流量測量范圍內(nèi)使用為普遍的儀表，被許多的工業(yè)企業(yè)所喜愛。需要準(zhǔn)備的測試設(shè)備：萬用表一只、500MΩ絕緣電阻測試儀一臺。測試檢查步驟：（1）在管道充滿介質(zhì)的情況較，用萬用表測量接線端子A、B與C之間的電阻值，A-C、B-C之間的阻值應(yīng)較大至相等。若差異在1倍以上，可能是電極出現(xiàn)滲漏、測量管外壁或接線盒內(nèi)有冷凝水吸附。（2）在襯里干燥情況較，用MΩ表測A-C、B-C之間的絕緣電阻（應(yīng)較大于200MΩ）。再用萬用表測量端子A、B與測量管內(nèi)二只電極的電阻（應(yīng)呈短路連通狀態(tài)）。若絕緣電阻很小，說明電極滲漏，應(yīng)將整套流量計返廠維修。若絕緣有所較降但仍有50MΩ以上且步驟（1）的檢查結(jié)果正常，則可能是測量管外壁受潮，可用熱風(fēng)機(jī)對外殼內(nèi)部進(jìn)行烘干。無錫音叉式流量計哪家好流量計橡膠襯里具有較好的彈性和耐磨性，耐沖擊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海高精度流量計廠家,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142236116619/4092847.png"></div><p style="text-indent:25px">電磁流量計的特點(diǎn)：1、電磁流量計是一種體積流量測量儀表，在測量過程中，它不受被測介質(zhì)的溫度、粘度、密度以電導(dǎo)率（在一定范圍）的影響。因此，電磁流量計只需經(jīng)水標(biāo)定后，就可心用來測量其它導(dǎo)電性液體的流量。2、電磁流量計的輸出只與被測介質(zhì)的平均流動速成正比，而與對稱分布較的流動動狀態(tài)（層流動或湍流動）無關(guān)。所以電磁流量計的量程范圍極寬，其測量范圍度可達(dá)100：1，有的甚至達(dá)1000：1的可運(yùn)行流量范圍。3、電磁流量計無機(jī)械慣性，反應(yīng)靈敏，可以測量瞬時脈動流量，也可測量正反兩個方向的流量。4、工業(yè)用電磁流量計的口徑范圍極寬，從幾個毫米一直到幾米，而且國內(nèi)已有口徑達(dá)3m的實(shí)流動校驗(yàn)設(shè)備，為電磁流量計的應(yīng)用和發(fā)展奠定了基礎(chǔ)。</p><p style="text-indent:25px">電磁流量計噪音分析：流動體摩擦襯里和電極，流動體中發(fā)生的正離子和負(fù)離子從電解液中分離出來。內(nèi)襯和電極表面越粗糙，游離離子濃度越高。一部分離子在電極信號電場的作用較向電極移動，從而形成噪聲電壓，這就是流動動噪聲。在低電導(dǎo)率測試中，流動動噪聲的影響是很明顯的。流動場噪聲與外電場強(qiáng)度有關(guān)，當(dāng)流動速較較大時，感應(yīng)信號越較大，噪聲越較大，輸出的穩(wěn)定性越差。流動體的電導(dǎo)率和pH值的急劇變化也會形成流動動噪聲，上游流量計加藥性能的測量不穩(wěn)定性就是一例。其原因是不同介質(zhì)在不均勻混合時，流動體中很容易分離出正負(fù)離子，部分離子會受到電極信號電場的影響向電極移動，產(chǎn)生流動動噪聲電壓，導(dǎo)致輸出不穩(wěn)定。由于在襯里和電極附近的高流動速流動流動體的層流動邊界層厚度變得非常薄，因此襯里和電極的粗糙度值都超過了流動速層邊界層的厚度，流動體沖擊這部分的粗糙度值，就會發(fā)生流動速擴(kuò)散和突變。部分流動速分量與測量管中心軸向相同(或相反)，受信號權(quán)函數(shù)的影響，對電極信號產(chǎn)生較較大的正向影響，這就是較高流動速噪聲。微小流量流體――橢圓齒輪流量計、電磁流量計、金屬管浮子流量計。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海高精度流量計廠家,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142352865915/7487119.png"></div><p style="text-indent:25px">24V供電電磁流量計首要用于工業(yè)現(xiàn)場不允許運(yùn)用溝通電或從安全方面思索選用低壓直流電的場所，或是配流量積算儀由積算儀給電磁流量計中止供電，只能挑選24V電池供電，電磁流量計現(xiàn)在使用不是太多，首要針對一些現(xiàn)場沒有任何電源的情況下選用。一起也有毛病報警功用，上量設(shè)置并報警功用，正反相流量中止切換功用，帶485通訊的功用。電磁流量計除了供電方法有著多樣性之外，其內(nèi)涵功用也很強(qiáng)壯，可以用于測量液體介質(zhì)的流速，可以測量介質(zhì)的正向流量和反相流量，可以測量瞬時流量和累積流量。可以做成一體式和分體式兩種，根據(jù)客戶的懇求來定。電磁流量計電路板出廠前老化運(yùn)行，且整表逐臺標(biāo)定，更適合現(xiàn)場使用。無錫音叉式流量計哪家好</p><p style="text-indent:25px">電磁流量計只需經(jīng)水標(biāo)定后，就可心用來測量其它導(dǎo)電性液體的流量。上海高精度流量計廠家</p><p style="text-indent:25px">電磁流量計液體方面（如液體電導(dǎo)率均勻性,電極污染等問題）的原因：液體電導(dǎo)率變化或不均勻,在靜止時會使零點(diǎn)變動,流動時使輸出晃動。因此流量計位置應(yīng)遠(yuǎn)離注入藥液點(diǎn)或管道化學(xué)反應(yīng)段下游,流量傳感器裝在這些場所的上游。液體若含有固相,或雜質(zhì)沉積測量管內(nèi)壁，或在測量管內(nèi)壁結(jié)垢，或電極被油脂等污穢等等,均有可能出現(xiàn)零點(diǎn)變動。因?yàn)閮?nèi)壁表面結(jié)垢和和電極污穢程度不可能完全一樣和對稱，破壞廠初始凋零設(shè)定的平衡狀況.積極措施足除去污穢和沉積垢層;若零伙變動不大也可嘗試重新調(diào)零。檢查電極接觸電阻和電極絕緣電阻分2步進(jìn)行：（1）充滿液體測量電極表面勺液體接觸電阻流量傳感器卸下信號電纜接線,用萬用表分別測量每電極與接地點(diǎn),間的電阻,兩電極對地電姐值之左應(yīng)在10％－20％.第九節(jié)中"一/電極接觸電阻的測量"將有進(jìn)一步說明。（2）空管測量電極絕緣放空測量管,用干布揩于內(nèi)表面,待完全干燥后,用H500VDC兆歐表測量各電極與地間的電阻們,阻值必須在100MΩ以上。上海高精度流量計廠家</p><p style="text-indent:25px">南儀測控技術(shù)(上海)有限公司致力于五金、工具，是一家生產(chǎn)型的公司。公司業(yè)務(wù)涵蓋壓力變送器，溫度傳感器，液位計，流量計等，價格合理，品質(zhì)有保證。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于五金、工具行業(yè)的發(fā)展。在社會各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅實(shí)有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2913699.html</p></div></div></div></div></div><div id="cryf87o" 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