免费观看30分钟哔哩哔哩视频_防爆聲級計原理，常見(jiàn)故障處理方法-青島路博建業(yè)環(huán)?？萍加邢薰?/title> <META NAME="Keywords" CONTENT="防爆聲級計原理,防爆聲級計常見(jiàn)故障處理方法"> <META NAME="Description" CONTENT="防爆聲級計是一種數字化、模塊化多功能聲級計，是一種電子儀器，但又不同于電壓表等客觀(guān)電子儀表。其安全性能符合GB3836.1、3836.4的有關(guān)規定。采用了先進(jìn)的數字檢波技術(shù)，具有可靠性高、穩定性好、動(dòng)態(tài)范圍寬、無(wú)需量程轉換等優(yōu)點(diǎn)。"> <link href="/Skins/410118/css/style.css" rel="stylesheet" type="text/css"> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body> <h1><a href="http://xiwind.cn/">国产在线观看成永久视频_无码日韩精品免费区_欧美日韩在线免费观看网址你懂的_深夜福利在线观看日本_精品黄色视频在线免费看_欧美日韩国产①区在线_欧美日韩综合一区_最新2021厕所偷拍精品视频_亚洲黄色特级视频_成人午夜电影福利免费</a></h1><h1><a href="http://xiwind.cn/">国产在线观看成永久视频_无码日韩精品免费区_欧美日韩在线免费观看网址你懂的_深夜福利在线观看日本_精品黄色视频在线免费看_欧美日韩国产①区在线_欧美日韩综合一区_最新2021厕所偷拍精品视频_亚洲黄色特级视频_成人午夜电影福利免费</a></h1><div id="z7txb" class="pl_css_ganrao" style="display: none;"><track 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class="mup"><div id="f9rdfrffl7j" class="mup_left">ARTICLE / <span>技術(shù)文章</span></div><div id="f9rdfrffl7j" class="mup_right"><a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > 防爆聲級計原理，常見(jiàn)故障處理方法</div></div> <h1 class="tittle">防爆聲級計原理，常見(jiàn)故障處理方法</h1> <div id="f9rdfrffl7j" class="wz_time">更新日期：2023-02-13 瀏覽次數：1005 </div> <div id="f9rdfrffl7j" class="nr"> 　　防爆聲級計是一種數字化、模塊化多功能聲級計，是一種電子儀器，但又不同于電壓表等客觀(guān)電子儀表。其安全性能符合GB3836.1、3836.4的有關(guān)規定。采用了*數字檢波技術(shù)，具有可靠性高、穩定性好、動(dòng)態(tài)范圍寬、無(wú)需量程轉換等優(yōu)點(diǎn)。<div>　　工作原理是：</div><div>　　由傳聲器將聲音轉換成電信號，再由前置放大器變換阻抗，使傳聲器與衰減器匹配。放大器將輸出信號加到計權網(wǎng)絡(luò )，對信號進(jìn)行頻率計權(或外接濾波器)，然后再經(jīng)衰減器及放大器將信號放大到一定的幅值，送到有效值檢波器(或外按電平記錄儀)，在指示表頭上給出噪聲聲級的數值。</div><p style="text-align: left;"><img src="https://img66.chem17.com/9/20230213/638119045112328575441.jpg" alt="防爆聲級計" width="751" height="695" align="middle" /></p><div>　　防爆聲級計常見(jiàn)故障應該怎么處理？</div><div>　　1、聲級計的測量讀數明顯偏低或校準時(shí)校不到94.0dB</div><div>　　(1)傳聲器靈敏度太低或損壞：更換傳聲器并重新校準。</div><div>　　(2)前置放大器的接點(diǎn)與傳聲器接觸不好：清洗接點(diǎn)</div><div>　　(3)前置放大器的插頭與主機插座接觸不好：更換插頭插座。</div><div>　　2、聲級計的低聲級測量時(shí)讀數偏高</div><div>　　前置放大器的地線(xiàn)接觸不良：旋緊外套筒。</div><div>　　3、聲級計的顯示器無(wú)顯示</div><div>　　(1)內部電池連線(xiàn)斷開(kāi)或電池接觸不好：焊好連線(xiàn)，更換電池接觸片。</div><div>　　(2)電池損壞：更換電池。</div><div>　　為保證聲級計測量的準確性，使用前及使用后要進(jìn)行校準。將聲級校準器配合在傳聲器上，開(kāi)啟校準電源，讀取數值，調節噪音計靈敏度電位器，完成校準。</div><div>　　注意事項</div><div>　　1、聲級計應避免放置于高溫、潮濕、有污水、灰塵及含鹽酸、堿成分高的空氣或化學(xué)氣體的地方。</div><div>　　2、在不知道被測聲級有多大時(shí)，必須把"衰減器"放在大衰減位置(例如120dB)，然后在測量時(shí)逐漸調整到被測聲級所需要的衰減檔位置,防止被測聲級過(guò)量程打壞聲級計。</div><div>　　3、校準放大器增益：電表功能開(kāi)關(guān)置"0"檔，"衰減器"開(kāi)關(guān)置"校準"，此時(shí)電表指針應處在紅線(xiàn)位置，否則需要調節靈敏度電位器。</div><div>　　4、測量時(shí)，聲級計應根據情況選擇好正確檔位，兩手平握聲級計兩側，傳聲器指向被測聲源，也可使用延伸電纜和延伸桿，減少聲級計外型及人體對測量的影響。聲級計使用位置應根據有關(guān)規定確定。</div><div>　　5、傳聲器切勿拆卸，防止擲摔，不用時(shí)放置妥當。</div><div>　　6、聲級計使用的電池電壓不足時(shí)應更換。</div><div>　　7、傳感器其精細且易損壞的比較昂貴的部件，在整個(gè)實(shí)驗過(guò)程中注意輕拿輕放。實(shí)驗完畢，拆下傳感器放入的地方。</div><div>　　8、聲級計使用電池供電，應檢查電池電壓是否滿(mǎn)足要求：電表功能開(kāi)關(guān)置"電池"檔，"衰減器"可任意設置，此時(shí)電表上的指示應在額定的電池電壓范圍內，否則需要更換電池。安裝電池或外接電源注意性，切勿反接。不用應取下電池，以免漏液損壞儀器。</div><p 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