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changeTableHeight(); } function changeTableHeight(){ $(".proshowParameter table th").each(function?(i,o){ ????var $this=$(o),? ????height=$this.next().height(); ????$(this).css("height",height); var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); $(".proshowParameter table td").each(function?(i,o){ var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); } </script> <section class="proshowParameter"> <table style=" margin-bottom:20px;"> <tbody> <tr><th>品牌</th><td>其他品牌</td><th>產(chǎn)地類別</th><td>國產(chǎn)</td></tr><tr><th>應用領域</th><td>石油,地礦,能源,電子/電池,電氣</td> <th></th><td></td></tr> </tbody> </table> </section><p><span>ZX79JD型兆歐表接地表標準電阻器（下稱電阻器）是專為計量檢定規(guī)程《JJG622－97絕緣電阻表（兆歐表）》和《JJG366－2004接地電阻表》，用來檢定兆歐表和接地電阻表而設計的旋轉(zhuǎn)式標準電阻器，并依據(jù)行業(yè)標準JB/T8225－99《試驗室直流電阻器》所規(guī)定的有關技術要求制造，它具有超高阻的電阻值，阻值調(diào)節(jié)范圍寬，體積小，造型美觀，使用方便等優(yōu)點。</span></p><p>1、檢定額定電壓為5000V或低于5000V的各類絕緣電阻表。<br/></p><p>2、供各類絕緣電阻表生產(chǎn)或修理中刻劃標度盤。</p><p>3、適用于絕緣高阻計的校對或檢定。</p><p>4、檢定各類型號的接地電阻表。</p><p>5、作高、中、低阻值標準電阻箱使用。</p><p>三、主要技術指標</p><p>（一）兆歐表標準電阻器</p><p>1、檢定兆歐表的標準電阻器，由九個十進盤組成，即：</p><p>11×104 MΩ＋10×（103＋102＋10＋1＋0.1＋0.01＋0.001</p><p>＋0.0001）MΩ</p><p>電阻值調(diào)節(jié)范圍為0～121111.1110MΩ，最小步進值為100Ω。</p><p>2、各十進盤的等級指數(shù)和使用電壓或電流（即參考電壓或電流）見表1</p><p>3、殘余電阻值＜0.1Ω，變差＜0.01Ω。</p><p>4、環(huán)境的參考條件為溫度23 ℃，相對濕度40％～60％。</p><p>5、環(huán)境的標稱使用范圍為溫度23±5℃，</p><p>相對濕度25％～75％。雙金屬溫度計</p><p>6、線路對外殼的絕緣電阻＞1×1012Ω。</p><p>7、線路對外殼的絕緣強度能承受50Hz正弦波交流電壓8KV，歷時1分鐘不擊穿。</p><p>（二）接地電阻表標準電阻器</p><p>1、模擬接地電阻主要技術指標見表2</p><p>2、模擬輔助接地電阻主要技術指標見表3</p><p>3、當裝置接入電阻小于1Ω時，殘余電感小于5μH。</p><p>4、環(huán)境的參考條件為溫度20±5℃，相對濕度40％~60%。</p><p>5、環(huán)境標稱使用范圍為溫度20±15℃, 相對濕度25％～75％。</p><p>6、線路對外殼的絕緣電阻＞1×109Ω。</p><p>7、線路對外殼的絕緣強度能承受50Hz正弦波交流電壓2000V，歷時1分鐘不擊穿。</p><p>（三）其它</p><p>1、本電阻器外形尺寸：602×323×210mm。</p><p>2、重量：＜15kg</p><p><br/></p> </div> <link rel="stylesheet" type="text/css" href="/css/MessageBoard_style.css"> <script language="javascript" src="/skins/Scripts/order.js?v=20210318" type="text/javascript"></script> <a name="order" id="order"></a> <div id="iqaqewgi6e" class="ly_msg" id="ly_msg"> <form method="post" name="form2" id="form2"> <h3>留言框 </h3> <ul> <li> <h4 class="xh">產(chǎn)品：</h4> <div id="iqaqewgi6e" class="msg_ipt1"><input class="textborder" size="30" name="Product" id="Product" value="ZX79JD接地電阻絕緣電阻表檢定裝置" 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