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<ul> <div class="ag0icou4w4" id="submenu_同高電子" style="display:none"> <li id="ag0icou4w4" class="left_nav_xl"><a href="/SonList-1408386.html" title="壓敏電阻測試儀">壓敏電阻測試儀</a></li> </div> </ul> </ul> </div> <div id="ag0icou4w4" class="page-right"> <div id="ag0icou4w4" class="onurl"> <a href="/"><img src="/Skins/333987/images/home.png"></a><a href="/">網(wǎng)站首頁</a>><a href="/article.html">技術(shù)文章</a> > 了解ETCR2000鉗形接地電阻測試儀這篇文章就會使用</div> <div id="ag0icou4w4" class="page-news"> <div id="ag0icou4w4" class="newshowheader"> <h1 class="nd_title">了解ETCR2000鉗形接地電阻測試儀這篇文章就會使用</h1> <div id="ag0icou4w4" class="article-info"> <span> 瀏覽：</span> 1628<span id="ag0icou4w4" class="split">|</span> <span id="publishtime">更新時間：2021-10-17</span> <span id="ag0icou4w4" class="split">|</span> </div> </div> <div id="ag0icou4w4" class="page-newshow"> <p><strong>了解ETCR2000鉗形接地電阻測試儀這篇文章就會使用</strong><br/></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">ETCR2000系列鉗形接地電阻測試儀</span><span style="margin: 0px; background-color: rgb(250, 250, 250); box-sizing: border-box; font-family: tahoma;">廣泛應(yīng)用于電力、電信、氣象、油田、建筑及工業(yè)電氣設(shè)備等的接地電阻測量、回路電阻測量。在測量有回路的接地系統(tǒng)時，不需斷開接地引下線，不需輔助電極，安全快速。ETCR鉗形接地電阻儀能測量出用傳統(tǒng)方法無法測量的接地故障，能應(yīng)用于傳統(tǒng)方法無法測量的場合，測量的是接地體電阻和接地引線電阻的綜合值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">ETCR2000系列鉗形接地電阻測試儀</span></span><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif; font-size: 16px;">在測量有回路的接地系統(tǒng)時，不需斷開接地引下線，不需輔助電極，只需把鉗表直接鉗在接地引下線上即可，此時鉗表顯示值是接地體電阻和接地引線電阻的綜合值，該測量方法能快速、安全的得出測量結(jié)果。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">ETCR2000系列鉗形接地電阻測試儀</span></span><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif; font-size: 16px;">能測量出用傳統(tǒng)方法無法測量的接地故障，能應(yīng)用于傳統(tǒng)方法無法測量的場合，并且廣泛應(yīng)用于各種設(shè)備的接地電阻測量。</span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">ETCR2000鉗形接地電阻測試儀</span></span><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"></span><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">現(xiàn)場應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUmAKhFuAABEQRMP8I8276.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 200px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUaAJ9JYAADrqNrVQMM633.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 455px;"/><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUeAA3MJAAJE00myCS0454.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 332px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"> <img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUiAOnhpAAJLBGoHGbQ783.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 307px;"/><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/D2/CgAGfFtWyUmAdvG-AAK__VmL2j0609.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 325px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; color: rgb(255, 0, 0);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;">ETCR2000系列鉗形接地電阻測試儀</span></span></span><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">現(xiàn)場應(yīng)用</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">1. </span></span></span><span style="margin: 0px; box-sizing: border-box; color: rgb(255, 0, 0);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">ETCR2000系列鉗形接地電阻測試儀</span></span><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">鉗表結(jié)構(gòu)</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/E0/CgAGfFtW0V2AI5riAACRJGUUtdA582.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 249px;"/></span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">1）. 鉗頭:65×32mm</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">2）. HOLD鍵：鎖定/解除顯示/存儲</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">3）. 扳機：控制鉗口張合</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">4）. ON/OFF鍵：開機/關(guān)機/退出/組合**數(shù)據(jù)</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">5）. MEM鍵：數(shù)據(jù)查閱鍵/組合**數(shù)據(jù)</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">6）. * 電阻測量切換鍵Ω/右箭頭鍵</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">7）. *電流測量切換鍵A/左箭頭鍵</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">8）. AL報警功能鍵：報警功能開啟/關(guān)閉/報警臨界值設(shè)定</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">9）. 液晶顯示屏</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">注：“*"**于C型。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">2. </span></span><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"> </span></span>ETCR2000系列鉗形接地電阻測試儀<span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"> 系列型號</span></span></span></p><div id="ag0icou4w4" class="tabledivclass" style="width: 100%; height: 129px;"><table border="1" cellpadding="0" cellspacing="0" class="ueditorTableStyle" style="margin-top: 0px; margin-right: 0px; margin-left: 0px; border-spacing: 0px; background-color: rgb(255, 255, 255); -webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; color: rgb(136, 136, 136); empty-cells: show; font-family: 微軟雅黑; max-width: 748px; outline: 0px; padding: 0px; table-layout: inherit; text-size-adjust: none; width: 853px;" align="left"><tbody style="margin: 0px; box-sizing: border-box;"><tr style="margin: 0px; box-sizing: border-box;" class="firstRow"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">型號</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">電阻量程</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">電流量程</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">說明</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">ETCR2000+</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01-1200Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"> </td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">基礎(chǔ)型</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">ETCR2000A+</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01-200Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"> </td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">實用型</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">ETCR2000B+</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01-1200Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"> </td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">防爆型</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">ETCR2000C+</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01-1200Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0-20A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">多功能</span></span></p></td></tr></tbody></table></div><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">3. </span></span>ETCR2000鉗形接地電阻測試儀<span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">主要技術(shù)參數(shù)</span></span></span></p><div id="ag0icou4w4" class="tabledivclass" style="width: 100%; height: 789px;"><table border="1" cellpadding="0" cellspacing="0" class="ueditorTableStyle" style="margin-top: 0px; margin-right: 0px; margin-left: 0px; border-spacing: 0px; background-color: rgb(255, 255, 255); -webkit-tap-highlight-color: rgba(0, 0, 0, 0); box-sizing: border-box; color: rgb(136, 136, 136); empty-cells: show; font-family: 微軟雅黑; max-width: 748px; outline: 0px; padding: 0px; table-layout: inherit; text-size-adjust: none; width: 853px;" align="left"><tbody style="margin: 0px; box-sizing: border-box;"><tr style="margin: 0px; box-sizing: border-box;" class="firstRow"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗口尺寸</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">65mm×32mm</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗口張開尺寸</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">32mm</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗表尺寸</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">長寬厚285mm×85mm×56mm</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td rowspan="2" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗表質(zhì)量</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">1160g（含電池）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">(han</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td rowspan="10" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">電阻量程</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">測量范圍</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">分辨力</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">準確度</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.010Ω-0.099Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.001Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（1%＋0.01Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.10Ω-0.99Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（1%＋0.01Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">1.0Ω-49.9Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.1Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（1%＋0.1Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">50.0Ω-99.5Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.5Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（1.5%＋0.5Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">100Ω-199Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">1Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2%＋1Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">200Ω-395Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">5Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（5%＋5Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">400-590Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">10Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（10%＋10Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">600Ω-880Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">20Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（20%＋20Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">900Ω-1200Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">30Ω</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（25%＋30Ω）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td rowspan="6" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">電流量程</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.00mA -9.95mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.05mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋1mA）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">10.0mA -99.0mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.1mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋5mA）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">100mA -300mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">1mA</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋10mA）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.30A-2.99A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.01A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋0.1A）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">3.0A-9.9A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.1 A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋0.3A）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">10.0A-20.0A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.1 A</span></span></p></td><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">±（2.5%＋0.5A）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">電源</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">6VDC（4節(jié)5號堿性干電池LR6）</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">換檔</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">全自動換檔</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">單次測量時間</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">0.5秒</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">液晶顯示器</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">4位LCD數(shù)字顯示，長寬47mm×28.5mm</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">數(shù)據(jù)存儲</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">99組</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">聲光報警</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">“嘟--嘟--嘟--"報警聲，按AL鍵開、關(guān)</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">報警臨界值設(shè)定范圍</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> 電阻：1-199Ω；電流：1-499mA</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">防爆標志</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">Exia Ⅱ BT3 Ga</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">計量制造許可證</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">粵制0000741號</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">企業(yè)生產(chǎn)標準</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">Q/（GZ）YTDZ1-2007</span></span></p></td></tr><tr style="margin: 0px; box-sizing: border-box;"><td style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">隨機附件</span></span></p></td><td colspan="3" style="margin: 0px; box-sizing: border-box;"><p style="font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: 宋體; color: rgb(85, 85, 85); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗表：1件；測試環(huán)：1件；電池LR6：4節(jié)；儀表箱： 1件</span></span></p></td></tr></tbody></table></div><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">4. </span></span>ETCR2000鉗形接地電阻測試儀<span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">電阻測量原理</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">ETCR2000系列鉗表的基本原理是測量封閉回路的電阻。如下圖所示。鉗表在被測回路上感應(yīng)一個電勢E，在電勢E的作用下被測回路上產(chǎn)生一個電流I。鉗表對E及I進行測量，并通過下面的公式即可得到被測電阻R：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EE/CgAGfFtW3LeAdXWUAAAJBolo9CM802.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 133px;"/><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EE/CgAGfFtW3LiABngnAABVNk6YWZ4583.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 141px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">因此，ETCR2000鉗表所測的接地電阻是接地極對地電阻以及接地線電阻的總和。它還可以測量回路的連接情況。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">我們在現(xiàn)場測量時必須注意被測裝置的接地是否形成回路。如果沒有回路，必須借助輔助地極和測試線也可以測出它的接地電阻值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;"> </span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">5. </span></span>ETCR2000鉗形接地電阻測試儀<span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">正確開機</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">按下鉗表的POWER按鈕后，鉗表即處于開機自檢狀態(tài)。待液晶屏上顯示“OLΩ"后，自檢狀態(tài)結(jié)束。如鉗表未能顯示“OLΩ"，請按動鉗表手柄，讓鉗口張合兩次重新開機。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">因此，當按下POWER按鈕后到液晶屏顯示“OLΩ"的這段時間內(nèi)（自檢時間約1秒），鉗表不可鉗繞任何金屬導(dǎo)體，不能翻轉(zhuǎn)鉗表，亦不可壓按鉗表的手柄和鉗口，應(yīng)使鉗表處于自然閉合的靜止狀態(tài)。否則不能完成自檢，將對測量誤差帶來很大影響。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">開機出錯鉗表顯示“Er"開機出錯符號。</span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/EF/CgAGfFtW3gaACpgbAAA3OqhOOSI377.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 135px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">開機正確鉗表顯示“OLΩ"，用戶可以如右圖所示用隨機的測試環(huán)檢驗一下。鉗表顯示值應(yīng)該與測試環(huán)上的標稱值一致（5.1Ω）。顯示值與標稱值相差一個字，是正常的。如：測試環(huán)的標稱值為5.1Ω時，顯示5.0Ω或5.2Ω都是正常的。用戶可放心使用。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">鉗表的具體操作方法請參考使用說明書。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;"> </span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">6. </span></span>ETCR2000鉗形接地電阻測試儀<span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">在各種接地系統(tǒng)的應(yīng)用。</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">一般情況下，我們將接地系統(tǒng)分為三種：多點接地系統(tǒng)、有限點接地系統(tǒng)、單點接地系統(tǒng)。下面介紹ETCR2000在這三種種接地系統(tǒng)的應(yīng)用</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">1</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">）多點接地系統(tǒng)的應(yīng)用</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">多點接地系統(tǒng)（例如輸電系統(tǒng)桿塔接地、通信電纜接地系統(tǒng)、某些建筑物等），它們通過架空地線（通信電纜的屏蔽層）連接，組成了多點接地系統(tǒng)。見下圖。當用鉗表測量時，其等效電路如下：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/F0/CgAGfFtW4EGAc2_eAACDiwEqJ2E196.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 400px;"/><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/B6/F0/CgAGfFtW4EKAQebXAABMAwZRwYA879.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 340px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">其中：R1為待測的接地電阻。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">R0為所有其它桿塔的接地電阻并聯(lián)后的等效電阻。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">由于接地點數(shù)量很多，從工程角度設(shè)定R0=0。這樣，我們所測的電阻就應(yīng)該是R1了。多次不同環(huán)境、不同場合下與傳統(tǒng)方法進行對比試驗，證明上述設(shè)定是*正確的。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">對于多點接地系統(tǒng)，無需斷開接地引線，無需輔助地極，只需用ETCR2000+鉗表鉗住接地引線即可測出阻值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">2）有限點接地系統(tǒng)的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">有些桿塔接地系統(tǒng)是由數(shù)個桿塔通過架空地線彼此相連；某些建筑物的接地也不是一個獨立的接地網(wǎng)，而是幾個接地體通過導(dǎo)線彼此連接。這種3個以上10個以下的接地系統(tǒng)我們稱為有限點接地系統(tǒng)。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">這種情況也較普遍。在這種情況下，如果將上圖中的R0視為0則會對測量結(jié)果帶來較大誤差。可以通過一組非線性方程組把阻值解算出來，但是人工解算它是十分困難的。為此，我公司提供了“有限點接地系統(tǒng)解算程序軟件"，用戶可在PC機上進行機解。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box; text-align: center;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><img src="https://0.rc.xiniu.com/g2/M00/B6/F1/CgAGfFtW4VKASxT0AAE9Y-HzKBI512.jpg" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; vertical-align: middle; width: 800px; height: auto !important;"/></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">3）單點接地系統(tǒng)的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">從測試原理來說，ETCR2000系列鉗表只能測量回路電阻，對單點接地是測不出來的。但是，用戶*可以利用一根測試線及接地系統(tǒng)附近的接地極，人為地制造一個回路進行測試。下面介紹二種用鉗表測量單點接地的方法，此方法可應(yīng)用于傳統(tǒng)的數(shù)字式接地電阻表無法測試的場合。例如地下室內(nèi)或樓層上的機房、避雷針、電梯、加油站、被混凝土覆蓋的接地體、以及無法從系統(tǒng)中分離的接地體等等，使用數(shù)字式接地電阻表測量接地電阻是非常困難的，但ETCR2000鉗表利用輔助地極和一根測試線就可以測算出它們的接地電阻。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">（</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">a</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">）．</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">二點法</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">見下圖，在被測接地體RA附近找一個獨立的接地較好的接地體RB（例如臨近的自來水管、建筑物等）。將RA和RB用一根測試線連接起來。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D0/CgAGe1tW4R6ARGVDAAB-dY1NmF0340.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 573px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">由于鉗表所測的阻值是兩個接地電阻和測試線阻值的串聯(lián)值：RT=RA+RB+RL</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">其中：RT為鉗表所測的阻值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">RL為測試線的阻值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">將測試線頭尾相連即可用鉗表測出其阻值RL。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">所以，如果鉗表的測量值小于接地電阻的允許值，那么這兩個接地體的接地電阻都是合格的。如果輔助地極接地良好（如消防栓、建筑物大地網(wǎng)等），由于輔助地極的接地電阻很小，所以被測地極的接地電阻近似于鉗表所測的阻值。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">（</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">b</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">）．</span></span><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">三點法</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">三點法可以準確測算出接地極的阻值。如下圖，在被測接地體RA附近找二個獨立的接地體RB和RC。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">di一步，將RA和RB用一根測試線連接起來，見下圖。用鉗表讀得di一個數(shù)據(jù)R1。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D4/CgAGe1tW4_eAFZH5AABydVa5mp0909.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 398px;"/></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">**步，將RB和RC連接起來，見下圖。用鉗表讀得**個數(shù)據(jù)R2。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5FGAFNqcAAB0ab3DK54104.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 397px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">第三步，將RC和RA連接起來，見下圖。用鉗表讀得第三個數(shù)據(jù)R3。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5HOAB3sFAABtzXYYdIk075.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 399px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">上面三步中，每一步所測得的讀數(shù)都是兩個接地電阻的串聯(lián)值。這樣，就可以很容易地計算出每一個接地電阻值：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">由于： R1=RA+RB R2=RB+RC R3=RC+RA</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">所以： RA=（R1+R3-R2）÷2</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">這就是接地體RA的接地電阻值。為了便于記憶上述公式，可將三個接地體看作一個三角形，則被測電阻等于鄰邊電阻相加減對邊電阻除以2。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">其它兩個作為參照物的接地體的接地電阻值為：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">RB=R1-RA RC=R3-RA</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">7. 電力系統(tǒng)的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">(1) 輸電線桿塔接地電阻的測量：</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">通常輸電線路桿塔接地構(gòu)成多點接地系統(tǒng)，只需用ETCR鉗表鉗住接地引下線，即可測出該支路的接地電阻阻值。（請見下圖）</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"> </span><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5aaADNysAABMY41dKeM113.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 560px;"/></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">注：測試時如鉗表顯示“L 0.01Ω"，說明同一個桿塔有兩根接地引下線并在地下連接，測試時應(yīng)將另一根引線解扣。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">(2) 變壓器中性點接地電阻的測量</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">變壓器中性點接地有二種情形：如有重復(fù)接地則構(gòu)成多點接地系統(tǒng)；如無重復(fù)接地按單點接地測量。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">(3) 發(fā)電廠變電所的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">ETCR2000鉗表可以測試回路的接觸情況和連接情況。借助一根測試線，可以測量站內(nèi)裝置與地網(wǎng)的連接情況。接地電阻可按單點接地測量。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">8. 電信系統(tǒng)的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">（1）樓層機房接地電阻的測量</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">電信系統(tǒng)的機房往往設(shè)在樓房的上層，使用搖表測量非常困難。而用ETCR2000鉗表測試則非常方便，用一根測試線連接消防栓和被測接地極（機房內(nèi)都設(shè)有消防栓），然后用鉗表測量測試線。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">鉗表阻值 = 機房接地電阻 + 測試線阻值 + 消防栓接地電阻</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">如果消防栓接地電阻很小，則：</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);">機房接地電阻 ≈ 鉗表阻值 - 測試線阻值</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;"><span style="margin: 0px; box-sizing: border-box; font-family: 微軟雅黑, sans-serif;">（2）機房、發(fā)射塔接地電阻的測量</span></span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">機房、發(fā)射塔接地通常構(gòu)成二點接地系統(tǒng)，如下圖。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D5/CgAGe1tW5qqAXVvBAABQN96jSuE981.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 390px;"/></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">如果鉗表的測量值小于接地電阻的允許值，那么機房、發(fā)射塔的接地電阻都是合格的。如果鉗表的測量值大于允許值，請按單點接地進行測量。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63);"><span style="margin: 0px; box-sizing: border-box; font-weight: 700;">9. 建筑物接地系統(tǒng)的應(yīng)用</span></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;">如果建筑物的各接地極是獨立的，各接地極的接地電阻測量請見下圖。</span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; color: rgb(85, 85, 85); background-color: rgb(255, 255, 255); box-sizing: border-box;"><span style="margin: 0px; box-sizing: border-box; font-size: 16px;"><span style="margin: 0px; box-sizing: border-box; color: rgb(63, 63, 63); font-family: 微軟雅黑, sans-serif;"><img alt="ETCR2000系列鉗形接地電阻儀現(xiàn)場應(yīng)用" src="https://0.rc.xiniu.com/g2/M00/AB/D8/CgAGe1tW6JeAR8AVAABZh-CXr_A269.png" style="margin: 0px; padding: 0px; border: 0px; max-width: 100%; max-height: 100%; box-sizing: border-box; height: auto; vertical-align: middle; width: 401px;"/></span></span></p><p style="margin-top: 0px; margin-bottom: 0px; padding: 0px; font-variant-numeric: normal; font-variant-east-asian: normal; font-stretch: normal; line-height: 24px; font-family: Tahoma; 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