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<p>聊一聊溶氧儀的那些注意事項</p><p>　　溶氧儀是為鍋爐給水和凝結(jié)水等溶解氧測量設(shè)計的，確保了在（超）低濃度的穩(wěn)定性和準確性，在測量性能和使用環(huán)境等方面有很大的提高。溶氧儀主要用于化工化肥、冶金、環(huán)保、制藥、生化、食品和自來水等溶液中溶解氧值的連續(xù)監(jiān)測。</p><p>　　溶氧儀一般采用浸入式安裝，在此應(yīng)注意，一定要選用原廠的安裝支架。廠家配帶的安裝支架為不銹鋼制成，帶有塑料鏈條，通過調(diào)整鏈條長度可以改變傳感器的浸入深度，支架上的引導(dǎo)管保證了傳感器始終處于垂直位置。支架部分都經(jīng)過特殊設(shè)計，它可以將水面的波動傳至浸入管，從而引起浸入管的輕微振動，使得通過浸入管在探頭的表面產(chǎn)生一個附加的清洗效果。有的用戶為了減少投資，自己制作安裝支架，往往導(dǎo)致支架上的浸入管和傳感器之間密封不嚴，污水滲入，使得電纜和傳感器的連接處長期浸泡在污水中，容易造成傳感器的損壞；有的甚至不做安裝支架，直接將傳感器投入水中，這樣在傳感器和電纜之間會形成較大的拉力，傳感器更容易損壞。溶解氧探頭每周應(yīng)用水輕輕清洗，發(fā)現(xiàn)膜頭損壞應(yīng)及時更換，電解液受污染也應(yīng)及時更換。</p><p>　　溶氧儀注意事項：</p><p>　　1.每天使用前做一次標定，采用水飽和氣法，一天內(nèi)即使關(guān)過機也不必再標定；</p><p>　　2.標定和測量時的溫度不要相差太大，不超過+-5℃為宜；</p><p>　　3.讀數(shù)不正常一定要換溶解氧儀膜（如開機后讀數(shù)不穩(wěn)定或不是從高到低趨于穩(wěn)定）；</p><p>　　4.換溶氧儀膜時電解液內(nèi)不能留有氣泡，膜不能折皺，多余的膜割除干凈；</p><p>　　5.傳感器電解液干了一定要換溶氧膜；</p><p>　　6.換溶氧膜時要用去離子水或蒸餾水沖掉舊電解液，滴入2-3滴新電解液甩干。普通溶氧傳感器要滴滿新電解液至液面鼓起，壓上溶氧膜，不留氣泡；蓋膜要注入半量新電解液，旋緊；</p><p>　　7.蓋膜更換后即可使用，普通膜更換后應(yīng)放置一夜，讓膜*恢復(fù)平衡；</p><p>　　8.溶氧膜表面受到沾污要細心清洗干凈，不能損傷膜；</p><p>　　9.推薦2-4周換一次溶氧膜，但在水質(zhì)條件好、維護得當?shù)那闆r下，甚至可長達半年換一次溶氧膜，前提是每次標定讀數(shù)正常；</p><p>　　10.測量時如果底部不斷冒氣泡，應(yīng)將傳感器頭朝上，綁在電纜上，不能讓氣泡停留在溶氧膜表面；</p><p>　　11.溶氧儀測量時需要攪拌，適當?shù)臄嚢栌欣讷@得真實的溶氧讀數(shù)。快速脈沖法和微電ji陣列測量時無需攪拌；</p><p><br/></p> 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