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</ul> </div> </li> </ul> </div> </div></div> <div id="1571n5fppxr7" class="inpage_right"> <div id="1571n5fppxr7" class="mbx2"><a href="/">首頁</a> > <a href="/article.html">技術(shù)文章</a> > PC40B型高絕緣電阻測量儀結(jié)構(gòu)及工作原理注意事項</div> <div id="1571n5fppxr7" class="inpage_content"> <div id="1571n5fppxr7" class="nr_main_box"> <h1 class="inside_rnewtil">PC40B型高絕緣電阻測量儀結(jié)構(gòu)及工作原理注意事項</h1> <div id="1571n5fppxr7" class="inside_rnewtime">點擊次數(shù)：613 更新時間：2024-02-25</div> <div id="1571n5fppxr7" class="inside_rnewcon"><p><span style="font-size: 14px; font-family: 宋體;"></span></p><p><strong><span style="font-size: 14px; font-family: 宋體;"></span></strong></p><p><span style="font-size: 16px;"><strong><span style="font-family: "Times New Roman";">PC40B</span><span style="font-family: 宋體;">型高絕緣電阻測量儀</span></strong><strong><span style="font-family: 宋體;">結(jié)構(gòu)及工作原理</span></strong></span></p><p><br/></p><p><span style="font-family: 宋體; font-size: 16px;">　　由直流高壓測試電源、放電測試裝置、高阻抗直流放大器、電源和顯示器組成。</span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">3.2</span><span style="font-size: 16px; font-family: 宋體;">　工作原理</span></span></p><p><span style="font-size: 16px;"><span style="font-size: 16px; font-family: 宋體;">　　儀器作高阻測試時其主要原理如圖</span><span style="font-family: "Times New Roman"; font-size: 14px;">1</span><span style="font-size: 16px; font-family: 宋體;">所示。測試時，被測試樣與高阻抗直流放大器的輸入電阻“</span><span style="font-family: "Times New Roman"; font-size: 14px;">R</span><sub><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: sub;">0</span></sub><span style="font-size: 16px; font-family: 宋體;">"串聯(lián)并跨接于直流高壓測試電源上。高阻抗直流放大器將其輸入電阻上的分壓訊號經(jīng)放大后輸出至顯示器，由顯示器直接讀出被測絕緣電阻值。</span></span></p><p><span style="font-family: 宋體; font-size: 16px;"></span></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img42.chem17.com/9/20240225/638444439492307262752.png" title="G@X$40$EA7YFY$$4G$SLZ_I.png" alt="G@X$40$EA7YFY$$4G$SLZ_I.png"/></p><p><span style="font-size: 16px;"><span style="font-size: 16px; font-family: 宋體;"></span><strong style="white-space: normal;"><span style="font-size: 16px; font-family: "Times New Roman";">PC40B</span><span style="font-size: 16px; font-family: 宋體;">型高絕緣電阻測量儀結(jié)構(gòu)</span></strong></span></p><p><br/></p><p style="text-align: center"><img style="max-width:800px;max-height:300%;" src="https://img50.chem17.com/9/20240225/638444439339453226303.png" title="ZTFN`QGYZ2M6$RI0)O(P}IP.png" alt="ZTFN`QGYZ2M6$RI0)O(P}IP.png"/></p><p><br/></p><p style="text-indent:42px"><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">1</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“測試電阻"顯示器　　　　　</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">2</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“測試時間"顯示器</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: 宋體; font-size: 14px;">　　　</span><span style="font-family: "Times New Roman"; font-size: 14px;">3</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“方式選擇"開關(guān)　　　　　　</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">4</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“電壓選擇"開關(guān)</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: 宋體; font-size: 14px;">　　　</span><span style="font-family: "Times New Roman"; font-size: 14px;">5</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“電阻量程選擇"開關(guān)　　　　</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">6</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“輸入"端</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: 宋體; font-size: 14px;">　　　</span><span style="font-family: "Times New Roman"; font-size: 14px;">7</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“接地"端　　　　　　　　　</span></span><span style="font-family: "Times New Roman"; font-size: 14px;">8</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“高壓輸出"端</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: 宋體; font-size: 14px;">　　　</span><span style="font-family: "Times New Roman"; font-size: 14px;">9</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“時間"設(shè)定撥盤　　　　　</span></span><span style="font-family: "Times New Roman"; font-size: 14px;"> 10</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“定時"設(shè)定開關(guān)</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: 宋體; font-size: 14px;">　　 </span><span style="font-family: "Times New Roman"; font-size: 14px;"> 11</span><span style="font-family: 宋體; font-size: 14px;">　<span style="font-size: 16px; font-family: 宋體;">“電源"開關(guān)</span></span></span></p><p><span style="font-size: 16px;"><strong><span style="font-size: 16px; font-family: 宋體;"><strong style="white-space: normal;"><span style="font-size: 16px; font-family: "Times New Roman";">PC40B</span><span style="font-size: 16px; font-family: 宋體;">型高絕緣電阻測量儀</span></strong>安全注意事項</span></strong><strong><i></i></strong></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.1</span><span style="font-size: 16px; font-family: 宋體;">　使用前務(wù)必詳閱此使用說明書，并遵照指示步驟，依次操作。</span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.2</span><span style="font-size: 16px; font-family: 宋體;">　請勿使用非原廠提供之附件，以免發(fā)生危險。</span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.3</span><span style="font-size: 16px; font-family: 宋體;">　接到儀器輸入端的導線必須用高絕緣屏蔽線（絕緣電阻應</span><span style="font-family: "Times New Roman"; font-size: 14px;">></span><span style="font-size: 16px; font-family: "Times New Roman";">10</span><sup><span style="vertical-align: super; font-size: 16px; font-family: "Times New Roman";">1</span></sup><sup><span style="font-family: "Times New Roman"; font-size: 14px; vertical-align: super;">7</span></sup><span style="font-family: 宋體; font-size: 14px;"><span style="font-size: 16px; font-family: 宋體;">Ω），其長度不應超過</span><span style="font-size: 16px; font-family: "Times New Roman";">1m</span><span style="font-size: 16px; font-family: 宋體;">?！　　　　　　　　　　　　　　　　　?/span></span></span></p><div id="1571n5fppxr7" class="tabledivclass" style="width: 99%; float: left;"><p><span style="font-family: 宋體; font-size: 16px;">本儀器一般情況下不能用來測量一端接地被測物的絕緣電阻，在測試時，被測物應放在高絕緣的墊板上，以防止漏電，影響測試結(jié)果。</span></p></div><p><span style="font-family: "Times New Roman"; font-size: 16px;"><br/></span></p><p><span style="font-family: "Times New Roman"; font-size: 16px;"><br/></span></p><p><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">4.5</span><span style="font-size: 16px; font-family: 宋體;">　測試電工產(chǎn)品時，應盡量將面積較大的或外露的電極部分接至儀器的高壓輸出端，以免外界干擾。</span><br/></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.6</span><span style="font-size: 16px; font-family: 宋體;">　對電纜產(chǎn)品，如有外金屬護套可將這部分作為一電極，接至儀器高壓輸出端，而將芯線接至輸入端，對無外套保護的電纜，則可任意連接，但被測物必須放在金屬屏蔽罩內(nèi)，罩殼接地。</span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.7</span><span style="font-family: 宋體; font-size: 14px;"><span style="font-size: 16px; font-family: 宋體;">　測試高值電阻時，一般額定電壓為</span><span style="font-size: 16px; font-family: "Times New Roman";">100V</span></span><span style="letter-spacing: -1px; font-size: 16px; font-family: 宋體;">（對能承受高壓的電阻除外）。</span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.8</span><span style="font-family: 宋體; font-size: 14px;"><span style="font-size: 16px; font-family: 宋體;">　當被測絕緣電阻高于</span><span style="font-size: 16px; font-family: "Times New Roman";">1</span><span style="font-size: 16px; font-family: 宋體;">×</span><span style="font-size: 16px; font-family: "Times New Roman";">10</span></span><sup><span style="vertical-align: super; font-size: 16px; font-family: "Times New Roman";">10</span></sup><span style="font-size: 16px; font-family: 宋體;">Ω時，應將被測物置于屏蔽箱內(nèi)，箱外殼接地，以防干擾</span></span></p><div id="1571n5fppxr7" class="tabledivclass" style="width: 99%; float: left;"><p><span style="font-size: 16px;"><span style="font-size: 16px; font-family: "Times New Roman";">4.9</span><span style="font-size: 16px; font-family: 宋體;">　在測試電阻率較大的材料時，</span><span style="font-size: 16px; font-family: 宋體; letter-spacing: 0px;">由于材料易極化，應采用較高測試電壓。在進行體積電阻和表面電阻測量時，應先測體積電阻再測表面電阻，反之由于材料被極化而影響體積電阻。當材料連續(xù)多次測量后容易產(chǎn)生極化，會使測量工作無法進行下去，這時須停止對這種材料測試，置于凈處<span style="font-size: 16px; font-family: "Times New Roman";">8</span></span><span style="font-size: 16px; font-family: "Times New Roman"; letter-spacing: 0px;">h</span><span style="letter-spacing: 0px; font-size: 16px; font-family: "Times New Roman";">-10</span><span style="font-size: 16px; font-family: "Times New Roman"; letter-spacing: 0px;">h</span><span style="font-size: 16px; font-family: 宋體; letter-spacing: 0px;">后再測量或者放在<a class="bjFfcClass" style="color: rgb(0, 0, 0); text-decoration: underline;"><span style="font-size: 16px; font-family: 宋體; letter-spacing: 0px; color: rgb(0, 0, 0);">酒精</span></a>內(nèi)清洗，烘干，等冷卻后再進行測量。</span></span></p></div><p><br/></p><p><span style="font-family: 宋體; font-size: 16px;">　　在對同一塊試樣而采用不同測試電壓測量時，一般情況下所選擇的測試電壓越高所測得的電阻值偏低。</span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.10</span><span style="font-family: 宋體; font-size: 14px;"><span style="font-size: 16px; font-family: 宋體;">　本儀器顯示范圍為</span><span style="font-size: 16px; font-family: "Times New Roman";">0.200~1.999</span><span style="font-size: 16px; font-family: 宋體;">，如儀器顯示值小于</span><span style="font-size: 16px; font-family: "Times New Roman";">0.200</span><span style="font-size: 16px; font-family: 宋體;">時，應將電阻量程選擇開關(guān)降低一檔。如儀器顯示值為</span><span style="font-size: 16px; font-family: "Times New Roman";">1.999</span><span style="font-size: 16px; font-family: 宋體;">時，應將電阻量程選擇開關(guān)升高一檔。依次類推直到儀器的顯示值處于</span><span style="font-size: 16px; font-family: "Times New Roman";">0.200~1.999</span><span style="font-size: 16px; font-family: 宋體;">之間。</span></span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.11</span><span style="font-size: 16px; font-family: 宋體;">　測試時，人體不能觸及儀器的高壓輸出端及其連接物，以防高壓觸電危險。同時儀器高壓端也不能碰地，避免造成高壓短路。</span></span></p><p><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">4.12</span><span style="font-size: 16px; font-family: 宋體;">　避免在下列環(huán)境中使用：</span></span></p><p style="text-indent:28px"><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">a</span><span style="font-size: 16px; font-family: 宋體;">　避免放置陽光直射，雨淋或潮濕之處。</span></span></p><p style="text-indent:28px"><span style="font-size: 16px;"><span style="font-family: "Times New Roman"; font-size: 14px;">b</span><span style="font-size: 16px; font-family: 宋體;">　請遠離火源及高溫，以防機器溫度過高。</span></span></p><p><br/></p></div> <div id="1571n5fppxr7" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a 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