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src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142302835889/3702973.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="utpg3q3" 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>寧波超聲波流量計哪家便宜,流量計</p><p><span>***更新：</span>2021-02-06 05:11:38</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hq2q2g9" 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: </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="2yurt3y" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="wv8pkb2" class="box"><p><p style="text-indent:25px">電磁流量計自然干擾源主要是來源于較大氣層的電噪聲、地球外層空間的宇宙噪聲，它既是地球電磁流量計環(huán)境上基本要求組成的，同時又是對無線電通訊與空間技術(shù)造成干擾的干擾源。電磁流量計自然噪聲會對人造衛(wèi)星與宇宙飛船所運行產(chǎn)生干擾，也會對彈道導(dǎo)彈運載火箭的發(fā)射產(chǎn)生干擾。人為干擾源是有機電或是其他人工裝置而產(chǎn)生電磁流量計能量的干擾，其中一部分是專門用來發(fā)射電磁能量的裝置，列如有廣播，寧波超聲波流量計哪家便宜、電視、通信與導(dǎo)航等無線電設(shè)備，就稱為有意發(fā)射干擾源。還有一部分是在完成自身功能的同時附帶所產(chǎn)生的電磁能量的發(fā)射，寧波超聲波流量計哪家便宜，列如是在交通車輛、照明器具，寧波超聲波流量計哪家便宜、電動機械以及工業(yè)、醫(yī)用射頻設(shè)備，這些是稱為無意發(fā)射干擾源。電磁流量計已經(jīng)是工業(yè)企業(yè)測量液體介質(zhì)的流量計。寧波超聲波流量計哪家便宜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波超聲波流量計哪家便宜,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142302835889/3702973.png"></div><p style="text-indent:25px">電磁流量計使用中的常見故障，有的是由于儀表本身元器件損壞引起的故障，有的是由于選用不當(dāng)、安裝不妥、環(huán)境條件、流動體特性等因素造成的故障，如顯示波動、精度較降甚至儀表損壞等。它一般可以分為兩種類型：安裝調(diào)試時出現(xiàn)的故障（調(diào)試期故障）和正常運行時出現(xiàn)的故障（運行期故障）。1、調(diào)試期故障：調(diào)試期待故障一般出現(xiàn)在儀表安裝調(diào)試階段，一經(jīng)排除，在以后相同條件較不會再出現(xiàn)。常見的調(diào)試期故障通常由安裝不妥、環(huán)境干擾以及流動體特性影響等原因引起。2、運行期故障：運行期故障是電磁流量計經(jīng)調(diào)試并正常運行一段時期后出現(xiàn)的故障，常見的運行期故障一般由流量傳感器內(nèi)壁附著層、雷電打擊以及環(huán)境條件變化等因素引起。溫州油罐流量計哪家便宜電磁流量計可以用來測量水煤漿或泥漿等成份復(fù)雜的介質(zhì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波超聲波流量計哪家便宜,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637402711069791454/9673165.png"></div><p style="text-indent:25px">電磁流量計的特點：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的可運行流量范圍。3、電磁流量計無機械慣性，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的實流動校驗設(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">電磁流量計其他安裝注意事項：(1)直管段長度要求：為獲得正常測量精確度，電磁流量傳感器上游也要有一定長度直管段，但其長度與大部分其它流量儀表相比要求較低。90o彎頭、T形管、同心異徑管、全開閘閥后通常認(rèn)為只要離電極中心線(不是傳感器進口端連接面)5倍直徑(5D)長度的直管段，不同開度的閥則需10D；下游直管段為(2～3)D。(2)負(fù)壓管系的安裝：氟塑料襯里傳感器須謹(jǐn)慎地應(yīng)用于負(fù)壓管系；正壓管系應(yīng)防止產(chǎn)生負(fù)壓，例如液體溫度高于室溫的管系，關(guān)閉傳感器上下游截止閥停止運行后，流體冷卻收縮會形成負(fù)壓，應(yīng)在傳感器附近裝負(fù)壓防止閥。聚氨酯橡膠的耐磨性能極好，但是耐酸堿比較差。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧波超聲波流量計哪家便宜,流量計" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142352865915/7487119.png"></div><p style="text-indent:25px">如何避免電磁流量計中氣泡噪聲：1、應(yīng)從安裝上滿足電磁流量計上游直管段長度要求,規(guī)范儀表的安裝,選擇遠(yuǎn)離熱源的安裝場所,合理使用管道流動速,選用光潔度高的PFA氟塑料襯里和高純氧化鋁工業(yè)陶瓷導(dǎo)管。這些措施將有助于防止或減小旋渦和氣體分離的發(fā)生。也就是說,改進傳感器制造工藝、改善使用儀表環(huán)境條件和安裝條件、采用儀表上游加裝排氣閥等措施,有可能避免問題的發(fā)生。2、合理地設(shè)置流量計阻尼時間和功能,也可以解決出現(xiàn)氣泡噪聲測量的誤報警。阻尼時間的選擇是根據(jù)流量信號中發(fā)生氣泡噪聲的脈沖寬度來選取。一般應(yīng)取阻尼時間為氣泡噪聲脈沖寬度的3~5倍。如氣泡噪聲脈沖寬度是10s,阻尼時間應(yīng)取30~50s。具體選擇應(yīng)根據(jù)要求的控制精度,3倍脈沖寬度控制誤差在5%,5倍脈沖寬度控制精度高于1%。電磁流量計兼容液體、氣體、導(dǎo)熱油以及蒸汽計量。溫州油罐流量計哪家便宜</p><p style="text-indent:25px">我們選擇電磁流量計的襯里材料主要是根據(jù)被測介質(zhì)的腐蝕性、耐磨性、及溫度和壓力等參數(shù)。寧波超聲波流量計哪家便宜</p><p style="text-indent:25px">電磁流量計磁場邊緣效應(yīng)對測量有什么影響：若電磁流量計流動是氣泡流或是塞狀流，故障是除了測量值與實際值不符合之外，還會因為氣相瞬間遮蓋了電極表面而出現(xiàn)的輸出晃動。若是水平管道分層流中的流通面積氣相部分增大，就是液體未滿管程度增大，也是會出現(xiàn)有輸出晃動。電磁流量計液體未滿管到液體表面在電極以下，是會出現(xiàn)輸出超滿渡的現(xiàn)象，流量計在使用過程中，會遇到流量轉(zhuǎn)換器顯示流量不穩(wěn)定，會有波動情況。尤其是在電磁流量計管道存有散電流干擾時，只要有良好的接地保護，就能使電磁流量計準(zhǔn)確的測量，在不接地的情況下并不會影響到流量計準(zhǔn)確測量，但是一旦環(huán)境有所改變，就會造成流量計不能準(zhǔn)確穩(wěn)定的工作。所以在安裝時好是做好電磁流量計傳感器接地的保護，可以給電磁流量計創(chuàng)造出一個良好的工作環(huán)境。流量計在使用過程中，會遇到有轉(zhuǎn)換器顯示流量不穩(wěn)定，有波動的現(xiàn)象，在其管道存散電流干擾時，只要能良好的接地保護，就能使電磁流量計測量的準(zhǔn)確性。寧波超聲波流量計哪家便宜</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3187402.html</p></div></div></div></div></div><div id="u7hqcyh" class="page-right twoColRt"><div id="y93deq8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="jf2wy2p" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" 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