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<li><em></em><a href="/Article-3119431.html">在線cod分析儀日常維護(hù)注意事項</a></li> </ul> </div> </div>  </div> <script type="text/javascript" src="/skins/425871/js/pt_js.js"></script> <div id="msycia6gyuc" class="lyNyProDetail_right"> <div id="msycia6gyuc" class="lyNyProDetail_ConTit"><p>詳細(xì)介紹</p></div> <div id="msycia6gyuc" class="lyNyProDetail_ConText"> <p>一、應(yīng)用領(lǐng)域</p><p>儀器廣泛應(yīng)用于科研院所、污水處理、環(huán)境監(jiān)測、石化、造紙、制藥、印染、紡織、皮革、釀酒、電子、市政、高校等行業(yè)并受到廣大用戶的*。</p><p><img style="max-width:800px;max-height:300%;" src="https://img77.chem17.com/gxhpic_943be60474/75f0e85efce44cd26a8c9432beb64656c74495411a4ac2f0559d4daf056b1d34d163b9dcb258d759.jpg" title="SJ-CODcr2101型在線COD監(jiān)測儀詳情.jpg" alt="SJ-CODcr2101型在線COD監(jiān)測儀詳情.jpg"/></p><p><br/></p><p>二、測定原理</p><p>水樣、重鉻酸鉀消解溶液、硫酸銀溶液（硫酸銀作為催化劑加入可以更有效地氧化直鏈脂肪化合物）、以及硫酸汞溶液的混合液加熱到 165℃，重鉻酸離子氧化溶液中的有機(jī)物后顏色會發(fā)生變化，分析儀檢測此顏色的變化，并把這種變化換算成 COD 值輸出出來。消耗的重鉻酸離子量相當(dāng)于可氧化的有機(jī)物量。</p><p>水樣中還原性的無機(jī)物，例如亞硝酸鹽、硫化物和亞鐵離子，會和重鉻酸鉀反應(yīng)，影響測量結(jié)果，它們消耗的重鉻酸鉀的量會記入測量結(jié)果中，使測量結(jié)果偏高。</p><p>水樣中氯離子的干擾可以通過加入硫酸汞消除，因氯離子能與汞離子形成非常穩(wěn)定的HgCl2。</p><p><br/></p><p>三、<strong>在線COD檢測儀</strong>產(chǎn)品特點(diǎn)</p><p>（1）選擇閥組件：選擇試劑采樣時序，通道靈活多樣性，功能萬變，易維護(hù)高壽命等優(yōu)點(diǎn)。</p><p>（2）具有打印功能，可以鏈接打印機(jī)（選購），及時打印所測量數(shù)據(jù)。</p><p>（3）采用7寸觸摸屏，以及簡潔的操作界面，可達(dá)到用戶易學(xué)，易操作，易維護(hù)。</p><p>（4）超大的數(shù)據(jù)存儲容量，實現(xiàn)了不低于5年的歷史數(shù)據(jù)的保存(測量間隔為1次/1h)，滿足了客戶的需求。</p><p>（5）自動漏液報警功能，當(dāng)出現(xiàn)試劑泄漏時，儀器自動報警，提示用戶進(jìn)行維護(hù)。</p><p>（6）定量采用光信號識別功能，保證了定量的高準(zhǔn)確性。</p><p>（7）化學(xué)試劑維護(hù)簡單化，便攜化，每月更換1次試劑，大大減少了用戶的維護(hù)工作。</p><p>（8）可以實現(xiàn)對含氯離子35000mg/L的COD準(zhǔn)確測量。</p><p>（9）U盤一鍵升級，軟件更新更輕松。</p><p><br/></p><p>四、<strong>在線COD檢測儀</strong>技術(shù)參數(shù)</p><div id="msycia6gyuc" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" style="max-width: 748px;"><tbody><tr class="firstRow"><td><p>型號</p></td><td colspan="2"><p>SJ-CODcr 2101型在線COD監(jiān)測儀</p></td></tr><tr><td><p>方法依據(jù)</p></td><td colspan="2"><p>重鉻酸鹽分光光度法</p></td></tr><tr><td><p>執(zhí)行標(biāo)準(zhǔn)</p></td><td colspan="2"><p>HJ 377-2019</p></td></tr><tr><td><p>測量范圍</p></td><td colspan="2"><p>0-5000mg/L</p></td></tr><tr><td><p>定量下限</p></td><td colspan="2"><p>≤15mg/L（示值誤差±30%）</p></td></tr><tr><td><p>重復(fù)性</p></td><td colspan="2"><p>≤±5%</p></td></tr><tr><td><p>低濃度漂移</p></td><td colspan="2"><p>±5mg/L</p></td></tr><tr><td><p>高濃度漂移</p></td><td colspan="2"><p>≤5%</p></td></tr><tr><td rowspan="4"><p>示值誤差</p></td><td colspan="2"><p>基本量程 0-200mg/L</p></td></tr><tr><td><p>標(biāo)液濃度為 40.0 mg/L 時</p></td><td><p>± 10.0%</p></td></tr><tr><td><p>標(biāo)液濃度為 100.0 mg/L 時</p></td><td><p>± 8.0%</p></td></tr><tr><td><p>標(biāo)液濃度為 160.0 mg/L 時</p></td><td><p>± 5.0%</p></td></tr><tr><td rowspan="2"><p>記憶效應(yīng)</p></td><td><p>標(biāo)液濃度為 40.0 mg/L 時</p></td><td><p>±10.0%</p></td></tr><tr><td><p>標(biāo)液濃度為 160.0 mg/L 時</p></td><td><p>±8.0%</p></td></tr><tr><td rowspan="2"><p>實際水樣比對試驗</p></td><td><p>水樣濃度<50.0 mg/L</p></td><td><p>≤ 5 mg/L</p></td></tr><tr><td><p>水樣濃度≥50.0 mg/L</p></td><td><p>≤10.0%</p></td></tr><tr><td><p>擴(kuò)展量程</p></td><td colspan="2"><p>示值誤差：±3%，重復(fù)性：≤5%，高濃度漂移：≤3%</p></td></tr><tr><td><p>氯離子影響試驗</p></td><td colspan="2"><p>±10%</p></td></tr><tr><td><p>測量周期</p></td><td colspan="2"><p>測量周期為 20 分鐘，據(jù)實際水樣，可在 5～120min 任意修改消解時間</p></td></tr><tr><td><p>采樣周期</p></td><td colspan="2"><p>時間間隔（10～9999min 任意可調(diào)）和整點(diǎn)測量模式</p></td></tr><tr><td><p>校準(zhǔn)周期</p></td><td colspan="2"><p>1～99 天任意間隔任意時刻可調(diào)</p></td></tr><tr><td><p>維護(hù)周期</p></td><td colspan="2"><p>一般每月一次，每次約 60 min</p></td></tr><tr><td><p>輸出</p></td><td colspan="2"><p>RS-232，RS-485，4-20mA（選配）</p></td></tr><tr><td><p>環(huán)境要求</p></td><td colspan="2"><p>溫度可調(diào)的室內(nèi)，建議溫度+5～28℃；濕度≤90%（不結(jié)露）</p></td></tr><tr><td><p>電源</p></td><td 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