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href="/article.html">技術(shù)文章</a> > 數(shù)字接地電阻測試儀使用方法</div> <div id="ihno5c4uhq" class="inpage_content"> <div id="ihno5c4uhq" class="nr_main_box"> <h1 class="inside_rnewtil">數(shù)字接地電阻測試儀使用方法</h1> <div id="ihno5c4uhq" class="inside_rnewtime">點(diǎn)擊次數(shù)：1165 更新時(shí)間：2016-11-04</div> <div id="ihno5c4uhq" class="inside_rnewcon"><p><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">1、接地電阻測量（如圖一）</span><br /><br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E5%9B%BE%E7%89%87111.jpg" style="height:auto; margin:0px auto 5px !important; width:280px" /><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">· 沿被測接地極E（C2、P2）和電位探針P1及電流探針C1，依直線彼此相距20米，使電位探針處于E、C中間位置，按要求將探針插入大地。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">· 用導(dǎo)線將地阻儀端子E（C2、P2）、P1、C1與探針?biāo)谖恢脤?yīng)聯(lián)接。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">· 開啟地阻儀電源開關(guān)“ON”，選擇合適擋位輕按一下鍵該檔指標(biāo)燈亮，表頭LCD顯示的數(shù)值即為被測得的地電阻。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">2、土壤電阻率測量（如圖二）</span><br /><br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140324135627.jpg" style="height:auto; margin:0px auto 5px !important; width:262px" /><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">· 測量時(shí)在被測的土壤中沿直線插入四根探針，并使各探針間距相等，各間距的距離為L，要求探針入地深度為L/20cm，用導(dǎo)線分別從C1、P1、P2、C2各端子與四根探針相連接。若地阻儀測出電阻值為R，則土壤電阻率按下式計(jì)算：</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">Ф=2πRL</span><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px"> </span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">其中</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">Ф—土壤電阻率（Ω·cm）</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">L—探針與探針之間的距離(cm)</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">R—地阻儀的讀數(shù)（Ω）</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">用此法測得的土壤電阻率可近似認(rèn)為是被埋入探針之間區(qū)域內(nèi)的平均土壤電阻率。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">· 測地電阻、土壤電阻率所用的探針一般用鋁合金管或圓鋼。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">3、導(dǎo)體電阻測量（圖三）</span><br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140324135716.jpg" style="height:auto; margin:0px auto 5px !important; width:287px" /><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">4、地電壓測量</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">測量接線如圖一，撥掉C1插頭，E、P1間的插頭保留，啟動(dòng)地電壓（EV）檔，指示燈亮，讀取表頭數(shù)值即為E、P1間的交流地電壓值。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">5、測量完畢按一下電源“OFF”鍵，儀表關(guān)機(jī)。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">四、注意事項(xiàng)</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">1、存放保管本表時(shí)，應(yīng)注意環(huán)境溫度濕度，應(yīng)放在干燥通風(fēng)的地方為宜，避免受潮，應(yīng)防止酸堿及腐蝕氣體。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">2、測量保護(hù)接地電阻時(shí)，一定要斷開電氣設(shè)備與電源連接點(diǎn)。在測量小于1Ω的接地電阻時(shí)，應(yīng)分別用導(dǎo)線連在接地體上，C2在外側(cè)P2在內(nèi)側(cè)如圖四所示：</span><br /><br /><img alt="" src="http://i01.yizimg.com/ComFolder/586162/201403/%E6%88%AA%E5%9B%BE20140324135754.jpg" style="height:auto; margin:0px auto 5px !important; width:315px" /><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">3、測量大型接地網(wǎng)接地電阻時(shí)，不能按一般接線方法測量，可參照電流表、電壓表測量法中的規(guī)定選定埋插點(diǎn)。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">4、測量地電阻時(shí)反復(fù)在不同的方向測量3～4次，取其平均值。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">5、本儀表為交直流兩用，不接交流電時(shí)，儀表使用電池供電，接入交流時(shí)，優(yōu)先使用交流電。</span><br /><span style="background-color:rgb(255, 255, 255); color:rgb(85, 85, 85); font-family:宋體; font-size:12px">6、當(dāng)表頭左上角顯示“←”時(shí)表示電池電壓不足，應(yīng)更換新電池。儀表長期不用時(shí)，應(yīng)將電池全部取出，以免銹蝕儀表。</span></p><p><span style="font-size:14px"><font color="#555555" face="宋體">更多產(chǎn)品信息請?jiān)L問：<a ><strong><span style="font-size:16px">數(shù)字接地電阻測試儀</span></strong></a></font></span></p></div> <div id="ihno5c4uhq" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-1055714.html">數(shù)字式絕緣電阻測試儀使用方法</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-1053681.html">絕緣油介電強(qiáng)度測試儀的基本原理和保養(yǎng)措施</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>    <div class="ihno5c4uhq" id="z_Footer"> <div id="ihno5c4uhq" class="pz_down"> <div id="ihno5c4uhq" class="w_1200"> <div id="ihno5c4uhq" class="footT"> <div id="ihno5c4uhq" class="footAddr"> <div id="ihno5c4uhq" class="footTit">上海康登電氣科技有限公司</div> <div id="ihno5c4uhq" class="dAddr"><img class="ico" 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