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class="news_detail"> <h1>造成便攜式水樣抽濾器采樣不準確的原因及改良方法介紹</h1> <div id="vgbiibvsk0tz" class="nwdtl_tip"><span>更新時間：2021-10-22</span><span>瀏覽：1167次</span></div> <div id="vgbiibvsk0tz" class="nwdtl_con"> <div>　　便攜式水樣抽濾器是水質(zhì)采樣后對被采集水樣的現(xiàn)場過濾的儀器設(shè)備，自帶高容量鋰電池，續(xù)航時間長達20小時以上，廣泛應(yīng)用于環(huán)境監(jiān)測系統(tǒng)、自來水公司、鋼鐵企業(yè)、高?？蒲?、教學(xué)環(huán)境科研等部門。</div><div>　　通過用戶反饋以及現(xiàn)場反復(fù)試驗總結(jié)得知，出現(xiàn)以上現(xiàn)象的場景通常是采樣液面距離采樣器的垂直距離較高，當(dāng)垂直距離達到2米以上的時候就會出現(xiàn)采樣量誤差大的情況，隨著垂直距離的變大，采樣量誤差也越來越大。造成以上現(xiàn)象的原因主要有以下幾個：</div><div>　　1、隨著垂直距離的提升，蠕動泵在吸取水樣時，真空度逐漸加大，從而使水中的空氣容易逸出形成氣泡，而通常采樣量是通過蠕動泵運行時間來確定的，相同的時間下蠕動泵內(nèi)流過的容積是一定的，但假如該容積內(nèi)混合水樣以及容易一定容積的空氣，這樣會導(dǎo)致水樣采樣量的減少，該現(xiàn)象隨著垂直距離越大，表現(xiàn)出的越明顯；</div><div>　　2、在排空水樣時，由于距離較長存在排空不*，在采樣管內(nèi)殘留少部分水樣，再次取樣時殘留的水樣首先到達液位傳感器處，致使其誤動作，從而使采樣量誤差較大；</div><div>　　3、蠕動管或采樣管質(zhì)量不良，在垂直距離提升時，由于真空度的增加造成蠕動管或采樣管發(fā)生壓扁變形狀況，導(dǎo)致采樣量不準確。</div><div>　　針對采樣量不準確的現(xiàn)象以及其現(xiàn)象產(chǎn)生的原因，便攜式水樣抽濾器進行了技術(shù)上的改良：首先，反復(fù)測試，選取合格的不易形變的蠕動管及采樣管，以解決管材壓扁變形；其次，增加采樣量均衡模塊，以解決由于空氣原因以及液位傳感器誤動作的問題；第三，在程序上做升級，用戶可以選擇根據(jù)不同的估計垂直距離選擇相對應(yīng)不同的程序編號，定制化采樣使采樣量更準確。</div><div>　　希望上述內(nèi)容能夠幫助大家更好的了解本產(chǎn)品，同時也歡迎大家持續(xù)關(guān)注本站，小編會定期為大家?guī)砀嗟南嚓P(guān)產(chǎn)品知識介紹。</div> 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