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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>陜西省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>一體化溫度變送器制造商,溫度變送器</p><p><span>***更新：</span>2020-11-27 04:15:51</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="bkxumdm" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">西安倫騫電器設(shè)備有限責(zé)任公司</a></p><p><span>聯(lián)系人：</span>付海飛</p><p><span>郵箱: </span>xalunqian@163.com</p><p><span>電話: </span>13891837328</p><p><span>傳真: </span>138_</p><p><span>網(wǎng)址: </span>http://xalunqian.shop.88360.com</p><p><span>手機(jī): </span>138-91837328</p><p><span>地址: </span>高新區(qū)發(fā)展大道25號(hào)軍民融合創(chuàng)新港</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="shj83dv" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="hmjlspe" class="box"><p><p> 熱電偶冷端的溫度補(bǔ)償: </p> <p> 由于熱電偶的材料一般都比較貴重(特別是采用貴金屬時(shí))，一體化溫度變送器制造商，而測(cè)溫點(diǎn)到儀表的距離都很遠(yuǎn)，為了節(jié)省熱電偶材料，降低成本，通常采用補(bǔ)償導(dǎo)線把熱電偶的冷端(自由端)延伸到溫度比較穩(wěn)定的控制室內(nèi)，連接到儀表端子上。必須指出，熱電偶補(bǔ)償導(dǎo)線的作用只起延伸熱電極，使熱電偶的冷端移動(dòng)到控制室的儀表端子上，一體化溫度變送器制造商，它本身并不能消除冷端溫度變化對(duì)測(cè)溫的影響，不起補(bǔ)償作用。因此，一體化溫度變送器制造商，還需采用其他修正方法來補(bǔ)償冷端溫度t0≠0℃時(shí)對(duì)測(cè)溫的影響。 </p> <p> 在使用熱電偶補(bǔ)償導(dǎo)線時(shí)必須注意型號(hào)相配，極性不能接錯(cuò)，補(bǔ)償導(dǎo)線與熱電偶連接端的溫度不能超過100℃。帶傳感器的變送器通常由兩部分組成:傳感器和信號(hào)轉(zhuǎn)換器。一體化溫度變送器制造商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體化溫度變送器制造商,溫度變送器" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637329347550908203/1975811.png"></div><p> 一體化溫度變送器通常由測(cè)溫探頭（熱電偶或熱電阻傳感器）和兩線制固體電子單元構(gòu)成。選用固體模塊方式將測(cè)溫探頭直接安裝在接線盒內(nèi)，然后構(gòu)成一體化的變送器。一體化溫度變送器通常分為熱電阻和熱電偶型兩種類型。熱電阻溫度變送器是由基準(zhǔn)單元、R/V變換單元、線性電路、反接維護(hù)、限流維護(hù)、V/I變換單元等構(gòu)成。測(cè)溫?zé)犭娮栊盘?hào)變換擴(kuò)大后，再由線性電路對(duì)溫度與電阻的非線性關(guān)系進(jìn)行抵償，經(jīng)V/I變換電路后輸出一個(gè)與被測(cè)溫度成線性關(guān)系的4～20mA的恒流信號(hào)。熱電偶溫度變送器通常由基準(zhǔn)源、冷端抵償、擴(kuò)大單元、線性化處理、V/I變換、斷偶處理、反接維護(hù)、限流維護(hù)等電路單元構(gòu)成。它是將熱電偶發(fā)生的熱電勢(shì)經(jīng)冷端抵償擴(kuò)大后，再帽由線性電路消除熱電勢(shì)與溫度的非線性差錯(cuò)，終擴(kuò)大變換為4～20mA電流輸出信號(hào)。為避免熱電偶測(cè)量中由于電偶斷絲而使控溫失效形成事故，變送器中還設(shè)有斷電維護(hù)電路。當(dāng)熱電偶斷絲或接解不良時(shí)，變送器會(huì)輸出大值（28mA）以使外表堵截電源。陜西防水型溫度變送器推薦DIN導(dǎo)軌裝置、儀表盤裝置型溫度變送器裝置和保護(hù)簡(jiǎn)略，能夠經(jīng)過改動(dòng)組態(tài)來匹配不一樣類型的溫度傳感器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體化溫度變送器制造商,溫度變送器" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637329346640117187/6056585.png"></div><p> 溫度傳感器元件的正常工作是要滿足其工作條件的，其中之一就是它的工作電流，由于溫度傳感器具有電阻值，當(dāng)電流流過溫度傳感器元件時(shí)，會(huì)有功率損耗，就會(huì)發(fā)熱，所以為了減小傳感器本身的發(fā)熱引起測(cè)溫誤差，所以要在滿足傳感器正常工作的條件下，盡量減少其本身的發(fā)熱。這就是為什么溫度傳感器要在恒定小電流條件下使用的原因。所以比如鉑熱電阻的常規(guī)工作電流是5MA，但我們推薦的工作電流是1MA。原因就是要減少溫度傳感器元件的自熱引起測(cè)量誤差。電流恒定，其輸出才會(huì)有溫度和電勢(shì)的線性關(guān)系。 </p> <p> 溫度傳感器的插入深度也是容易忽視的一個(gè)問題，有些客戶要求插入深度很短但是直徑比較大，這是不合理的，尤其是在高溫的情況下這是不可取的，理論上說溫度傳感器的插入深度一般可按實(shí)際需要決定。但*少插入深度不應(yīng)少于溫度傳感器保護(hù)套管直徑的8-10倍。這樣才能保證溫度傳感器性能穩(wěn)定。了解了溫度傳感器的工作電流和插入深度對(duì)我們選定和使用溫度傳感器是很有必要的。如果忽視這兩個(gè)細(xì)節(jié)問題很容易造成溫度傳感器性能不穩(wěn)定甚至損壞。 </p><p> 熱電阻隔離式溫度變送器是利用鉑電阻（銅電阻等）的阻值隨溫度改變的特性將溫度變化轉(zhuǎn)變?yōu)殡妷旱淖兓?，再?jīng)直流隔離變換，得到與輸入（溫度傳感器）完全隔離的對(duì)應(yīng)于被測(cè)點(diǎn)溫度的直流電壓或電流輸出。原理：給鉑（銅）電阻施加一個(gè)恒定電流，將電阻變化轉(zhuǎn)換成電壓變化。因鉑（銅）電阻存在非線性，為了達(dá)到高精度測(cè)溫要求，我公司在原有基礎(chǔ)上精益求精，增加了非線性校正電路，可以將大范圍變化的溫度線性轉(zhuǎn)化成電壓，再經(jīng)線性光耦隔離輸出。HCNR200/201線性光耦由高性能鋁鎵砷發(fā)光二極管（LED）和兩只緊密匹配的光電二極管構(gòu)成。輸入光電管用來控制LED發(fā)光的強(qiáng)度并使之穩(wěn)定，這樣就使LED的非線性和不穩(wěn)定性幾乎被完全消除，輸出光電管則產(chǎn)生一個(gè)光電流與LED發(fā)光的強(qiáng)度成線性關(guān)系。由于該器件兩只光電管的精密匹配和精心設(shè)計(jì)，確保了光耦具有很好的線性度和穩(wěn)定的增益。非強(qiáng)酸強(qiáng)堿均可以使用以普通材質(zhì)的溫度變送器，強(qiáng)酸強(qiáng)堿類的要求選用金屬類型的溫度變送器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體化溫度變送器制造商,溫度變送器" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637329347445859375/5427354.png"></div><p> 熱電阻與熱電偶溫度變送器: </p> <p> 溫度變送器已經(jīng)越來越多的應(yīng)用到石油、化工、化纖;紡織、橡膠、建材;電力、冶金、醫(yī)藥;食品等工業(yè)領(lǐng)域現(xiàn)場(chǎng)測(cè)溫過程控制。而熱電阻與熱電偶溫度變送器是常用的。 </p> <p> 溫度變送器采用熱電阻、熱電偶作為測(cè)溫元件，從測(cè)溫元件輸出信號(hào)送到變送器模塊，經(jīng)過穩(wěn)壓濾波、運(yùn)算放大、非線性校正、V/I轉(zhuǎn)換、恒流及反向保護(hù)等電路處理后，轉(zhuǎn)換成與溫度成線性關(guān)系的4～20mA電流信號(hào)輸出。溫度變送器將溫度變量轉(zhuǎn)換為可傳送的標(biāo)準(zhǔn)化輸出信號(hào)，將被測(cè)主回路交流電流轉(zhuǎn)換成恒流環(huán)標(biāo)準(zhǔn)信號(hào)，連續(xù)輸送到接收裝置。變送器有電動(dòng)單元組合儀表系列的和小型化模塊式的，多功能智能型的。甘肅智能溫度變送器推薦</p><p style="text-indent:25px">影響溫度變送器安全功用的主要因家有失效形式和自確診。一體化溫度變送器制造商</p><p> 熱電阻溫度變送器: </p> <p> 熱電阻溫度變送器中采用的熱電阻是用半導(dǎo)體材料，大多為負(fù)溫度系數(shù)，即阻值隨溫度增加而降低。溫度變化會(huì)造成大的阻值改變，因此它是zui靈敏的溫度變送器。熱電阻體積非常小，對(duì)溫度變化的響應(yīng)也快。但熱敏電阻需要使用電流源，小尺寸也使它對(duì)自熱誤差極為敏感。熱電阻在兩條線上測(cè)量的是yiding 溫度，有較好的精度。熱電阻溫度變送器非常適合需要進(jìn)行快速和靈敏溫度測(cè)量的電流控制應(yīng)用。 </p> <p> 熱電偶溫度變送器: </p> <p> 熱電偶溫度變送器是溫度測(cè)量中zui常用的溫度變送器。其主要好處是寬溫度范圍和適應(yīng)各種大氣環(huán)境，而且結(jié)實(shí)、價(jià)低，無需供電，也是低價(jià)的。但熱電偶并不適合高精度的的測(cè)量和應(yīng)用。一體化溫度變送器制造商</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2161001.html</p></div></div></div></div></div><div id="43ln8eb" class="page-right twoColRt"><div id="eyl79lc" 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