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class="ny_news_content_title"><span>新聞詳情</span><i>News Detail</i></div> <div id="hko1u76zd" class="ny_newsdetial"> <div id="hko1u76zd" class="news_name"> <h2>環(huán)氧地坪靜電量測(cè)試從以下幾個(gè)步驟進(jìn)行</h2> <p>時(shí)間：2024-08-21 來源：長(zhǎng)沙市博爾美環(huán)?？萍加邢薰?作者：管理員</p> </div> <div id="hko1u76zd" class="prodetail22"> <div id="hko1u76zd" class="s-component-content s-font-body"> <p> (1)<a target="_blank">環(huán)氧防靜電地坪</a>絕緣電阻的測(cè)量固體絕緣材料一般測(cè)定表面電阻和體積電阻.按照GB 1410~1989的標(biāo)準(zhǔn)要求測(cè)量工作至少應(yīng)在被測(cè)物體表面上隨機(jī)選取三個(gè)測(cè)量位置上進(jìn)行,在電極的任何點(diǎn)與樣品的邊緣之間的最小距離必須大于50ram. </p> <p> (2)靜電釋放時(shí)間的測(cè)量一個(gè)帶電物體,其電位自行衰減消散是滿足U=Ueo'.的指數(shù)規(guī)律的.放電時(shí)間常數(shù)r的物理意義是電位值衰減到原電位的e分之一所需的時(shí)間,即t-r時(shí),U一0.37U..為了使用和測(cè)量上的方便,一般用帶電體電位衰減到一半所需的時(shí)間,即半衰期來表征.由于r半一r×ln2,所以只要測(cè)量出半衰期r半,便可算出放電時(shí)間常數(shù)r.常用的測(cè)量方法如下. </p> <p> ①用靜電電位儀表帶自動(dòng)打印機(jī)每隔一定時(shí)間間隔記錄電壓衰減的數(shù)值,量取靜電電位Uo下降到0.37Uo所需的時(shí)間,即為放電時(shí)間常數(shù)r;或量取靜電電位Uo下降到0.5U0所需的時(shí)間,也就是半衰期r半. </p> <p> ②用有信號(hào)輸出口的靜電電位儀記錄靜電位衰減曲線,在曲線上可以根據(jù)曲線上的時(shí)標(biāo),分別量取靜電電位衰減到0.5U及0.37U時(shí)所經(jīng)過的時(shí)間,則分別為半衰期r半和放電時(shí)間常數(shù)r. </p> <p> ③已知或分別測(cè)出材料體電阻率.0和介電常數(shù)e,可計(jì)算出放電時(shí)間常數(shù)和半衰期.也可以由已知或分別測(cè)出材料體電阻.R.和體電容C,或地板對(duì)地電阻RE和對(duì)地電容CE,計(jì)算出r-RvC或r-RECE. </p> <p> ④利用平板電容離子平衡分析儀,將試樣放在電容平板上充分接觸后,對(duì)平板進(jìn)行充電到一定電壓,然后在斷開充電電源的瞬間,試樣加上一個(gè)接地平板電極,然后記錄靜電衰減一半或衰減到0.37U時(shí)的時(shí)間. </p> </div> </div> </div> </div> </div> </div> <div id="hko1u76zd" class="pro_tj"> <div id="hko1u76zd" class="pro_tj_content"> <div class="hko1u76zd" id="demo"> <div class="hko1u76zd" id="indemo"> <div class="hko1u76zd" id="demo1"> <a href='../Pro/73155.html'><img src='http://www.bffoo.com' border='0' /><p><font>推薦</font>超耐磨聚氨酯面漆</p></a><a href='../Pro/73015.html'><img src='http://www.bffoo.com' border='0' /><p><font>推薦</font>金剛砂地坪</p></a><a href='../Pro/61131.html'><img src='http://www.bffoo.com/Upload_file/Pro/202103/202103031657326861.jpg' border='0' 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