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<div id="aqgwbbhhdpu" class="ly_crumb"> <img src="/skins/257424/images/home.png"> <p>當(dāng)前位置：<a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > <span>分析cod氨氮測定儀的五個(gè)常見故障</span></p> </div>   <div id="aqgwbbhhdpu" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">分析cod氨氮測定儀的五個(gè)常見故障</h1> <div id="aqgwbbhhdpu" class="NyNewsdetail_tips">更新時(shí)間：2022-01-11 點(diǎn)擊次數(shù)：1284</div> <div id="aqgwbbhhdpu" class="NyNewsdetail_con" id="c_detail_wrap"> <div>　　氨氮是指游離氨或銨離子形式的氮。氨氮是水中的一種營養(yǎng)素，可導(dǎo)致水體富營養(yǎng)化，是水中主要的耗氧污染物，對魚類和某些水生生物有毒。<a href="http:///jsshengaohua-Products-19264865/" target="_blank"><strong>cod氨氮測定儀</strong></a>以游離氨或銨離子形式與氨氮反應(yīng)形成紅棕色復(fù)合物。可直接測定COD及氨氮，利用密封催化消解，然后進(jìn)行比色法測量，采用先進(jìn)的冷光源、窄帶干涉技術(shù)及微電腦自動處理數(shù)據(jù)，直接顯示樣品的COD（mg/L）及氨氮（mg/L）值。</div><div>　　在使用cod氨氮測定儀時(shí)有哪些常見的故障呢？讓我們一起來看下：</div><div>　　1、主機(jī)開機(jī)后屏幕不亮或者黑屏</div><div>　?。?）檢查電源的供電是否正常</div><div>　　（2）檢查儀器本身是否有電</div><div>　　2、空白溶液無法歸零</div><div>　?。?）重新啟動儀器</div><div>　　（2）檢查比色槽中的單色光是否存在或正常通過</div><div>　?。?）儀器在開機(jī)時(shí)上蓋是否是閉合的</div><div>　　（4）檢查空白溶液是否存在渾濁現(xiàn)象</div><div>　?。?）用空氣能否正常歸零</div><div>　　3、查看不到歷史數(shù)據(jù)，確認(rèn)在測定出結(jié)果后，是否進(jìn)行過保存，檢測出的結(jié)果均無零的原因</div><div>　?。?）檢查當(dāng)前使用的曲線值(Kv)設(shè)置是否為0</div><div>　?。?）確認(rèn)量取水樣時(shí)，包括空白在內(nèi)是否全部量取的是同一個(gè)樣品</div><div>　?。?）檢查比色槽中的單色光是否存在或正常通過</div><div>　　4、按鍵操作時(shí)無反應(yīng)</div><div>　?。?）檢查是否在特定設(shè)置界面下，部分按鍵操作無反應(yīng)是正?，F(xiàn)象</div><div>　?。?）重新啟動儀器</div><div>　　5、測定結(jié)果不穩(wěn)定，數(shù)值上下波動</div><div>　?。?）檢查比色溶液是否存在渾濁現(xiàn)象，觀察有無懸浮物</div><div>　?。?）水冷卻完成后，在向比色皿中轉(zhuǎn)移時(shí)是否進(jìn)行過反復(fù)混勻</div><div>　?。?）比色皿外壁是否有液體懸掛</div><div>　?。?）儀器在比色前是否進(jìn)行過預(yù)熱</div><div>　　（5）用空氣進(jìn)行歸零，觀察透過率是否穩(wěn)</div><div>　?。?）比色上蓋密封是否正常，有強(qiáng)光線直射干擾</div> 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