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cellpadding="0" cellspacing="0"> <tr> <td class="ziti25"><span id="fc04p4qthk6q" class="text13">公司名稱：上海化工研究院有限公司（上海坦聯化工科技） <br /> 電　　話：<span style="line-height:20px "></span><br /> 傳　　真：<span style="line-height:20px "></span><br /> 聯系人：錢衛(wèi)兵<br /> 手　　機：<span style="line-height:20px ">13524774377</span><br /> 詳細地址：<span style="line-height:20px ">上海市普陀區(qū)云嶺東路345號</span><br /> 郵　　編：<span style="line-height:20px ">200062</span><br /> 郵　　箱：<span style="line-height:20px "><a href="mailto:qwbing70@163.com">qwbing70@163.com</a></span> <br /> </tr> </table></td> </tr> <tr> <td bgcolor="#f1f1f1" height="5"></td> </tr> <tr> <td height="5"></td> </tr> </table> </td> </tr> <tr> <td><img src="/skins/110457/images/left_title_foot.gif" width="209" height="5" /></td> </tr> </table> </td> <td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="20" background="/skins/110457/images/m_bg.jpg"> </td> </tr> </table> <table width="724" border="0" align="center" 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cellspacing="0"> <tr> <td height="30"><div align="center"> <h3><strong>高純氮氣分析儀相關知識普及</strong></h3> </div></td> </tr> <tr> <td><hr width="98%" noshade="noshade" size="1" color="#BEBEBE" style="margin:0px" /></td> </tr> <tr> <td height="25"><div align="center">發(fā)布日期：[2020-06-27] 共閱[816]次 </div></td> </tr> <tr> <td valign="top" class="hj14-25"> 　　<strong><a href="http:///ybchemical-Products-18268095/ " target="_blank">高純氮氣分析儀</a></strong>是采用測量氧濃度的方法來換算出氮氣的濃度，首先利用氧電極將氣體中的氧濃度轉換成電信號，然后經減法器換算，直接讀出被測氣體中氮氣的濃度。該儀器采用空氣中的氮含量為79.0%進行定標，操作簡便，儀器測量范圍為50.0%～99.999%。該儀器還設有下限預置報警電路,當氮氣濃度低于下限設定值時,儀器便給出報警信號,報警指示燈亮,并有一路控制觸點輸出,報警設定范圍為99.00%～99.99%。同時，該儀器還有4～20mA的電流信號輸出（氧含量為0～0.1%）供記錄儀或微機連接監(jiān)測。<div>　　高純氮氣分析儀安裝：</div><div>　　將儀器表面板上開152×75mm的長方孔，然后將儀器插進開好的方孔內，再裝上安裝架并擰緊固定螺絲，儀器固定好后，接上220V交流電，再將氧電極插入儀器后面板的插座上，并接好輸出控制觸點開關，氧電極一頭接被測氣體，另一頭排空，氣體流量應控制正200～800ml/min為宜，流量可裝針閥調節(jié)。</div><div>　　高純氮氣分析儀工作原理：</div><div>　　儀器傳感器為電化學極譜法隔膜式氧電極。它采用鉑陰極、銀氧極、氯化鉀作電解液，隔膜材料采用聚四氟乙烯，此膜選擇性的透過氧。</div><div>　　電極反應如下：</div><div>　　陰極：O2+2H2O+4e→4OHˉ</div><div>　　陽極：Ag+Clˉ→AgCl↓+e</div><div>　　反應迅速達到平衡，同時產生一個極化擴散電流，此電流的大小正比于氣樣中氧的體積百分含量，此電流經放大器、減法器、A/D轉換器由LED數字顯示器顯示出氮氣的濃度。</div></td> </tr> </table> </td> </tr> </table> </td> </tr> </table> <table width="998" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td height="10"></td> </tr> <tr> <td height="28" background="/skins/110457/images/foot_Bg.jpg">　</td> </tr> <tr> <td 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