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推薦咨詢南儀測(cè)控技術(shù)供應(yīng)</h1><div id="updtdcr" class="proBig"><div id="mbuk2ex" class="bigimg"><div><p class="pic"><img 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 id="wh9kuej" class="smallimg"><div><p class="pic"><img 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="4xb83di" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>紹興差壓流量計(jì)訂購(gòu),流量計(jì)</p><p><span>***更新：</span>2021-01-31 00:25:37</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="bmcc8n2" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">南儀測(cè)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(hào)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="b2r2zgp" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="0rs7azg" class="box"><p><p style="text-indent:25px">造成電磁流量計(jì)誤差的主要影響因素，選型不當(dāng)：1、勵(lì)磁穩(wěn)定性：電磁流量計(jì)的勵(lì)磁方式有直流勵(lì)磁、交流正弦波勵(lì)磁和雙頻矩形波勵(lì)磁等，紹興差壓流量計(jì)訂購(gòu)，紹興差壓流量計(jì)訂購(gòu)，直流勵(lì)磁容易產(chǎn)生電極極化和直流干擾問題，交流正弦勵(lì)磁容易引起零點(diǎn)變動(dòng)，而雙頻矩形波勵(lì)磁既有低頻矩形波勵(lì)磁優(yōu)良的零點(diǎn)穩(wěn)定性，又有高頻矩形波勵(lì)磁對(duì)流體噪聲較強(qiáng)的克制能力，是一種較理想的勵(lì)磁方式。實(shí)際應(yīng)用時(shí)，應(yīng)盡量保證電源電壓和頻率的穩(wěn)定，以確保磁場(chǎng)強(qiáng)度恒定，紹興差壓流量計(jì)訂購(gòu)，減小由于磁場(chǎng)強(qiáng)度變化引起的測(cè)量誤差。2、待測(cè)液體流速：電磁流量計(jì)可測(cè)的流速范圍一般為0.5～10m/s，經(jīng)濟(jì)流速范圍為1.5～3m/s。實(shí)際使用時(shí)要根據(jù)待測(cè)流量大小及電磁流量計(jì)可測(cè)流速范圍來確定測(cè)量管內(nèi)徑。螺紋連接型渦輪流量計(jì)。傳感器以螺紋方式與管道連接。紹興差壓流量計(jì)訂購(gòu)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興差壓流量計(jì)訂購(gòu),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142302835889/3702973.png"></div><p style="text-indent:25px">智能一體化渦輪流量計(jì)產(chǎn)品特點(diǎn)：1、高精確度，一般可達(dá)±1%R、±0.5%R，高精度型可達(dá)±0.2%R；2、重復(fù)性好，短期重復(fù)性可達(dá)0.05%~0.2%,正是由于具有良好的重復(fù)性，如經(jīng)常校準(zhǔn)或在線校準(zhǔn)可得到極高的精確度，在貿(mào)易結(jié)算中是優(yōu)先選用的流量計(jì)；3、具備儀表系數(shù)三點(diǎn)修正，智能補(bǔ)償儀表系數(shù)非線性，并可進(jìn)行現(xiàn)場(chǎng)修正；4、范圍度寬，中大口徑可達(dá)1:20，小口徑為1:10；5、結(jié)構(gòu)緊湊輕巧，安裝維護(hù)方便，流通能力大；6、適用高壓測(cè)量，儀表表體上不必開孔，易制成高壓型儀表；7、**型傳感器類型多，可根據(jù)用戶特殊需要設(shè)計(jì)為各類**型傳感器，例如低溫型、雙向型、井下型、混砂**型等。8、可制成插入型，適用于大口徑測(cè)量，壓力損失小，價(jià)格低，可不斷流取出，安裝維護(hù)方便。紹興差壓流量計(jì)訂購(gòu)電池供電型電磁流量計(jì)目前所使用的不是很多，主要是用在現(xiàn)場(chǎng)沒有任何電源的情況下來使用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興差壓流量計(jì)訂購(gòu),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637402711026734705/3791399.png"></div><p style="text-indent:25px">電磁流量計(jì)磁場(chǎng)邊緣效應(yīng)對(duì)測(cè)量有什么影響：電磁流量計(jì)轉(zhuǎn)換器所輸入的阻抗在提高測(cè)量導(dǎo)電性液體時(shí)，一般是不會(huì)因?yàn)榻橘|(zhì)電導(dǎo)率稍有變化就會(huì)引起誤差，但是對(duì)于一定的轉(zhuǎn)換器所輸入阻抗，被測(cè)量介質(zhì)的電導(dǎo)率是有一個(gè)下限值，是不能低于該下限值的。被測(cè)介質(zhì)電導(dǎo)率太大也是不可以的，所以對(duì)一個(gè)電磁流量計(jì)來說，其測(cè)量不受到介質(zhì)電導(dǎo)率影響是有一定的范圍，被測(cè)介質(zhì)的電導(dǎo)率既不能太大，也不能太小。如果電磁流量計(jì)測(cè)量介質(zhì)的電導(dǎo)率偏高的話，磁場(chǎng)邊緣區(qū)就會(huì)產(chǎn)生有很大的渦電流，會(huì)引起二次磁通，會(huì)使工作磁場(chǎng)邊緣區(qū)兩側(cè)的磁場(chǎng)分別會(huì)被消弱與增強(qiáng)。所以在電磁流量計(jì)測(cè)量電導(dǎo)率介質(zhì)是不能使用交流勵(lì)磁，而使用直流激磁，在隨著電子技術(shù)持續(xù)發(fā)展，流量轉(zhuǎn)換器輸入阻抗的提高，是必可以降低被測(cè)介質(zhì)電導(dǎo)率的下限。流量計(jì)電極材質(zhì)與被測(cè)介質(zhì)配置不當(dāng)，將會(huì)有化學(xué)作用或是極化現(xiàn)象而影響到正常的測(cè)量，要根據(jù)被測(cè)介質(zhì)的腐蝕性來選擇電極的材料?？梢愿鶕?jù)被測(cè)介質(zhì)的腐蝕性、磨損性與溫度選擇電磁流量計(jì)內(nèi)襯材質(zhì)，盡量選用有防雷功能的電磁流量計(jì)。</p><p style="text-indent:25px">流量計(jì)的電磁損耗有以較幾種形式：1.金屬測(cè)量管內(nèi)的渦流動(dòng)損耗：激磁電源的頻率越高、磁場(chǎng)強(qiáng)度越強(qiáng)、磁場(chǎng)的軸向長(zhǎng)度越長(zhǎng)、測(cè)量管的管徑越較大、壁厚越厚，則渦電流動(dòng)越較大、渦流動(dòng)損耗越較大，磁感應(yīng)強(qiáng)度滯后于磁場(chǎng)電流動(dòng)的相位差角也越較大。2.磁滯損耗：磁滯損耗是由于磁性材料的磁滯特性造成的。線圈通以交流動(dòng)電后，由于磁性材料的磁滯現(xiàn)象，磁通相位比電流動(dòng)相位滯后一定的角度（磁滯角）。當(dāng)鐵芯中的磁感應(yīng)強(qiáng)度沒有達(dá)到飽和時(shí)，磁滯損耗是很小的。因此，電磁流量計(jì)的磁軛、鐵芯采用高磁導(dǎo)率的電工矽鋼片做成，矽鋼片的碾壓方向與磁力線方向一致，這樣，磁滯損耗較較大較降，可以忽略不計(jì)。3.渦流動(dòng)損耗：磁軛內(nèi)的渦流動(dòng)損耗磁軛應(yīng)采用磁導(dǎo)率高、電動(dòng)率低的薄片，每片之間應(yīng)緣，可以減少損耗，通常對(duì)幾十赫茲的市電頻率，矽鋼片厚度為0.25~0.5mm就可以使渦流動(dòng)損耗不致超過容許值。流體噪聲一直是電磁流量計(jì)要解決的重要技術(shù)問題之一。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興差壓流量計(jì)訂購(gòu),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142236116619/4092847.png"></div><p style="text-indent:25px">在石油化工、冶金、食品飲料、制藥、造紙、染料等眾多領(lǐng)域，通常采用電磁流量計(jì)對(duì)流動(dòng)的各種混濁、懸浮液體介質(zhì)（水煤漿、泥漿污水、水泥混凝土漿、紙漿、金屬流體等）的流量進(jìn)行測(cè)量。電磁流量計(jì)用信號(hào)電纜主要用于將電磁流量計(jì)的實(shí)際測(cè)量結(jié)果信號(hào)傳輸至顯示系統(tǒng)。隨著電磁流量計(jì)測(cè)量系統(tǒng)中電路的日趨復(fù)雜和對(duì)信號(hào)傳輸要求的逐步提高，傳統(tǒng)電磁流量計(jì)用信號(hào)電纜的性能已無法滿足使用要求。傳統(tǒng)電磁流量計(jì)用信號(hào)電纜的性能主要存在以下缺點(diǎn)和不足：電纜內(nèi)部產(chǎn)生較大噪音，造成信號(hào)的分辨率和精度較低。實(shí)際應(yīng)用中，傳統(tǒng)電磁流量計(jì)用信號(hào)電纜易因受振動(dòng)、沖擊、彎曲以及外界溫度變化，造成內(nèi)部摩擦，從而產(chǎn)生噪音。當(dāng)噪音夾在信號(hào)中一同輸出時(shí)，則將影響傳輸信號(hào)的分辨率和精度，這種影響在電磁流量計(jì)用于黏稠甚至難于流動(dòng)的固液兩相流介質(zhì)（如煤焦油、渣油、食物漿、紙漿、乳膠、混合膠）及脈動(dòng)流介質(zhì)等多種流體的微量*計(jì)量時(shí)更加突出，將造成計(jì)量誤差較大和計(jì)量不準(zhǔn)確。法蘭連接型渦輪流量計(jì)。傳感器以法蘭形式與管道連接。嘉興渦輪流量計(jì)口碑</p><p style="text-indent:25px">電磁流量計(jì)是基于法拉第電磁感應(yīng)定律工作的。紹興差壓流量計(jì)訂購(gòu)</p><p style="text-indent:25px">電磁流量計(jì)故障外界源頭：流體方面，液體含有均勻分布細(xì)小氣泡通常不影響正常測(cè)量，唯所測(cè)得體積流量是液體和氣體兩者之和；氣泡增大會(huì)使輸出信號(hào)波動(dòng)，若氣泡大到流過電極遮蓋整個(gè)電極表面，使電極信號(hào)回路瞬時(shí)斷開，輸出信號(hào)將產(chǎn)生更**動(dòng)。低頻（50／16Hz-50／6Hz）矩形波激磁電磁流量計(jì)測(cè)量液體中含有固體超過一定含量時(shí)將產(chǎn)生漿液噪聲，輸出信號(hào)亦會(huì)有一定程度波動(dòng)。兩種或兩種以上液體作管道混合工藝時(shí)，若兩種液體電導(dǎo)率（或各自與電極間電位）有差異，在混合未均勻前即進(jìn)入流量傳感器進(jìn)行流量測(cè)量，輸出信號(hào)亦會(huì)產(chǎn)生波動(dòng)。電極材質(zhì)與被測(cè)介質(zhì)選配不善，產(chǎn)生鈍化或氧化等化學(xué)作用，電極表面形成絕緣膜，以及電化學(xué)和極化現(xiàn)象等，均會(huì)妨礙正常測(cè)量。紹興差壓流量計(jì)訂購(gòu)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3083367.html</p></div></div></div></div></div><div id="srvnxwq" class="page-right twoColRt"><div id="a8szyk7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="3kpmm7h" 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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