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src="http://www.chem17.com/mystat.aspx?u=sunde17"></script>  <div id="rrhzbvv" class="ly_crumb"> <img src="/skins/342860/images/crumb_icon.png" /><p>當前位置：<a href="/">首頁</a> > <a href="/article.html">技術文章</a> > <span>林格曼數碼測煙望遠鏡的觀測方法和頻率</span></p> </div>   <div id="bjbdnv3" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">林格曼數碼測煙望遠鏡的觀測方法和頻率</h1> <div id="ffxhrjr" class="NyNewsdetail_tips">更新時間：2017-05-23 點擊次數：2711</div> <div id="h3j1xhp" class="NyNewsdetail_con"> <p><span style="font-size:12.0000pt"><span style="font-family:宋體">觀測方法與頻率</span></span></p><p><span style="font-size:12.0000pt"><span style="font-family:宋體">根據中華人民共和國環境保護行業標準 HJ/T 398-2007 固定污染源排放煙氣黑度的測定林格曼煙氣黑度圖法規定：</span></span></p><p><span style="font-size:12.0000pt"><span style="font-family:宋體">1.觀察時，將煙囪排出煙氣的黑度與林格曼煙氣黑度圖進行比較，記下煙氣的林格曼級數。如煙氣黑度處于兩個林格曼級之間，可估計一個0.5或0.25林格曼級數。如在陰天的情況下觀察，由于天空背景較暗，在讀數時應根據經驗取稍偏低的級數（減去0.25 級或0.5 級）。</span></span></p><p><span style="font-size:12.0000pt"><span style="font-family:宋體">2.每分鐘觀測4次，觀察者不宜一直盯著煙氣觀測，而應看幾秒鐘然后停幾秒鐘，每次觀測（包括觀看和間歇時間）約15秒，連續觀測煙氣黑度的時間不少于30分鐘。每次觀測15秒記錄一個讀數，連續觀測煙氣黑度的時間30分鐘，記錄120次觀測讀數，對于煙氣排放穩定的污染源，可減少觀測頻次，每分鐘觀測2次，記錄60個讀數。</span></span></p> </div> <div id="9rphzjh" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-1264753.html">水質硫化物酸化吹氣儀的操作方法</a></li> <li>下一篇：<a href="/Article-1264643.html">林格曼數碼測煙望遠鏡的工作原理</a></li> </ul> </div> </div>   <div id="3z5fxhh" class="ly_foot"> <div id="ppzj93z" class="ly_Ftmain"> <div id="tldxnpf" class="ly_FtLeft"> <div id="dpnnf9h" class="Ft_nav"><a href="/">首頁</a><a href="/aboutus.html" rel="nofollow">關于我們</a><a href="/products.html">產品展示</a><a href="/news.html">新聞中心</a><a href="/article.html">技術文章</a></div> <div id="pr93zpz" class="Ft_contact"> <div id="3vhrl3f" class="Ftcont_tit">聯系方式<em></em></div> <p>郵箱：qdsunde@qq.com</p> <p>地址：山東省青島市李滄區源頭路4號</p> </div> </div> <div id="jb97bzr" class="ly_FtCenter"> <p>咨詢熱線</p> <b>13045002690</b> <p>（周一至周日9:00- 19:00）</p> <a class="online-contact-btn" 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