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更新時間：2021-05-20</div> <div id="pvhr3jx3r5" class="inside_rnewcon"><div>　　<strong>進口驗電器是一種檢測物體是否帶電以及粗略估計帶電量大小的儀器。</strong>當(dāng)被檢驗物體接觸驗電器頂端的導(dǎo)體時，自身所帶的電荷會傳到玻璃鐘罩內(nèi)的箔片上。<br /> </div><div>　　由于同種電荷相互排斥，箔片將自動分開，張成一定角度。根據(jù)兩箔片張成角度的大小可估計物體帶電量的大小。其實這是箔片所受電場力包括箔片上同名的電荷的斥力和器皿內(nèi)壁異名電荷的吸引力。<br /> </div><div>　　如果將玻璃瓶改為使用金屬盒以便屏蔽靜電、金屬棒和器皿引出導(dǎo)線以便測量兩點間電勢差、增加刻度以便將結(jié)果量化，那么驗電器可以改造為更精確的靜電計。<br /> </div><div>　　下面讓我們主要來了解一下進口驗電器的故障檢修方法<br /> </div><div>　　1、按高壓驗電器上的試驗按鈕，指針高壓兆歐表報警音很小。用電壓表測量HD14011BP⑦腳對地電壓9V正常.對HD14011BP外圍元件檢查均正常，經(jīng)對三極管Q2檢查發(fā)現(xiàn)其性能不良，更換一只C9014，故障排除。<br /> </div><div>　　2、按高壓驗電器上的試驗按鈕，壓陶瓷片和發(fā)光二極管無報警。<br /> </div><div>　　根據(jù)故障現(xiàn)象判斷是前級感扁平橡套軟電纜，，應(yīng)檢測源觸發(fā)控制電路Q1、R1、R2、R3損壞，用萬用表對以上幾個元件檢查，均正常，再對HD14011BP外圍元件檢查，也沒發(fā)現(xiàn)問題，判斷為HD14011BP損壞.<br /> </div><div>　　3、按高壓驗電器上的手表式近電報警器，試驗按鈕，發(fā)光二極管發(fā)出的間歇性閃爍光正常，無壓電陶瓷片發(fā)出的警報音響檢查Q3、R10、R11、L均正常.壓電陶瓷片到電路板連接線良好，更換壓電陶瓷片，故障排除。<br /> </div><div>　　高壓驗電器電滑線變阻器，器必須定期檢查。在使用時應(yīng)輕拿輕放，不要劇烈搖動、震動。應(yīng)擺放到固定的櫥內(nèi)，切忌放于潮濕、電力測試導(dǎo)線，污物的地方，避免置超低頻高壓發(fā)生器，于含腐蝕性的空氣(如酸、堿等氣體)環(huán)境。高壓驗電器每隔半年應(yīng)進行一次預(yù)防性試驗。如發(fā)現(xiàn)驗電指示器的外殼有缺損，絕緣桿有裂紋等明顯缺陷時不宜進行預(yù)防性試驗，應(yīng)及時更換。<br /> </div><div>　　4、按高壓驗電器上的試驗按鈕，報警正常，但是用驗電器驗電時音響警報不響。<br /> </div><div>　　按高壓驗電器上的試驗按鈕，壓陶瓷片和滑線指示燈發(fā)光二極管報警正常，說明HD14011BP內(nèi)部電路及驅(qū)動電路、壓電陶瓷片和發(fā)光二極管正常，故障在前級感應(yīng)檢測源觸發(fā)控制電路，用萬用表檢查Q1、R1、R2發(fā)現(xiàn)，R2阻值變大為4MΩ，更換一只1MΩ的電阻，故障排除。</div></div> <div id="pvhr3jx3r5" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-2654045.html">TAG8600B無線高壓核相儀使用方法</a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a href="/Article-2645324.html">35kv紅色高壓絕緣墊【上?？档请姎狻考夹g(shù)</a></b></p> <span><a href="/article.html">返回列表>></a></span> </div> </div> </div> </div> </div>    <div class="pvhr3jx3r5" id="z_Footer"> <div id="pvhr3jx3r5" class="pz_down"> <div id="pvhr3jx3r5" class="w_1200"> <div id="pvhr3jx3r5" class="footT"> <div 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