QJ44直流雙臂電橋性能使用方法-上?？档请姎饪萍加邢薰?/title> <link type="text/css" rel="stylesheet" href="/Skins/106676/css/index.css" /> <script src="/skins/106676/js/jquery-3.6.0.min.js"></script> <link rel="stylesheet" type="text/css" href="/skins/106676/css/swiper.min.css"> <script type="text/javascript" src="/skins/106676/js/swiper.min.js"></script>  <script language="javascript" type="text/javascript"> var nav= '5'; var menu= '0'; </script>  <link rel="shortcut icon" href="/skins/106676/favicon.ico"> <script type="application/ld+json"> { "@context": "https://ziyuan.baidu.com/contexts/cambrian.jsonld", "@id": "http://m.globalchairs.cn/Article-2287832.html", "title": "QJ44直流雙臂電橋性能使用方法", "pubDate": "2020-07-08T09:17:11", "upDate": "2020-07-08T09:17:11" }</script> <script language="javaScript" src="/js/JSChat.js"></script><script language="javaScript">function ChatBoxClickGXH() { DoChatBoxClickGXH('https://chat.chem17.com',83189) }</script><script>!window.jQuery && document.write('<script 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id="yq00aqiue" class="nybanner"><img src="/skins/106676/images/nybanner.jpg"></div> <script src="http://www.chem17.com/mystat.aspx?u=mbdzkj"></script>  <div id="yq00aqiue" class="ncontent w_1100"> <div id="yq00aqiue" class="h-6">技術(shù)文章<span>您當(dāng)前的位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > QJ44直流雙臂電橋性能使用方法</span></div>  <div id="yq00aqiue" class="n-3 c-news"> <div id="yq00aqiue" class="newsnr"> <h1>QJ44直流雙臂電橋性能使用方法</h1> <p class="source"><span>日期：2020-07-08</span><span>瀏覽：1566次</span></p> <div> <p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 8.925pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 29.04pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">QJ44型攜帶式直流雙臂電橋，內(nèi)附晶體管檢流計(jì)和能內(nèi)附工作電源。適合于工礦企業(yè)、實(shí)驗(yàn)室或車(chē)間現(xiàn)場(chǎng)，對(duì)直流以低值電阻作準(zhǔn)確測(cè)量。如用來(lái)測(cè)量金屬導(dǎo)體的導(dǎo)電系數(shù)，接觸電阻、電動(dòng)機(jī)、變壓器繞組的電阻值，以及其它各類(lèi)直流低值電阻。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 30.84pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">二、電橋主要性能</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 17.955pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 18.84pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、準(zhǔn)確度等級(jí)：0.2級(jí)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 39.36pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、使用溫度范圍：5℃～45℃。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 39.36pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、測(cè)量范圍：0.00001～11</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">，基本量限0.01～11</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 8.925pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 30.96pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">4、準(zhǔn)確度：電橋在環(huán)境溫度為20℃</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">±</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">10℃，相對(duì)濕度小于80%的條件下，在基本量限內(nèi)，允許測(cè)量誤差為：</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 8.925pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 30.96pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">?</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">△</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">?</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">≤а% Rmax（允許誤差為滑線讀數(shù)刻度4小格）。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 39.24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">а…………………………………準(zhǔn)確度等級(jí)（0.2級(jí)）</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 39.36pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Rmax…………………………電橋讀數(shù)的滿刻度（</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">）</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 8.925pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 29.04pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">5、內(nèi)附晶體管檢流計(jì)，具有足夠的靈敏度。在基本量限內(nèi)，當(dāng)滑線讀數(shù)盤(pán)刻度變化4小格，檢流計(jì)指針偏離零位不小于1格。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 8.925pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 29.04pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">6、電橋的工作電源為1.5V～2V（內(nèi)附電源為1.5V1號(hào)手電筒電池4節(jié)并聯(lián)），晶體管檢流計(jì)工作電源為6F22、9V（2節(jié)并聯(lián)）。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 36pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">7、儀器外形尺寸：300×255×15</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; letter-spacing:1.1pt">0mm</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 36pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">8、儀器重量：約4.5Kg。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 27pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">三、線路和和結(jié)構(gòu)</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 24.045pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 17pt; text-indent: 12pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、QJ44雙臂電橋面板位置圖</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px;"><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"> <img alt="" src="http://y1.yizimg.com/ComFolder/486823//201202/%E5%9B%BE%E7%89%871(1).png?imageView2/2/format/webp/" style="border:0px; box-sizing:border-box; height:auto; max-width:100%; vertical-align:middle" /></span><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(1) 電橋外接工作電源接線柱 (2) 檢流計(jì)靈敏度調(diào)節(jié)旋鈕；</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(3) 晶體管檢流計(jì)工作電源開(kāi)關(guān) (4) 滑線讀數(shù)盤(pán)；</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(5) 步進(jìn)讀數(shù)開(kāi)關(guān) (6) 檢流計(jì)按鈕開(kāi)關(guān)；</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(7) 電橋工作電源按鈕開(kāi)關(guān) (8) 被測(cè)電阻電流端接線柱 </span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(9) 量程因素讀數(shù)開(kāi)關(guān) (10) 被測(cè)電阻電位端接線柱</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(11) 檢流計(jì)電氣調(diào)零旋鈕 (12) 被測(cè)電阻電流端接線柱</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 6pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">(13) 檢流計(jì)指示表頭</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、電橋線路： </span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px;"><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"> <img alt="" src="http://y1.yizimg.com/ComFolder/486823//201202/%E5%9B%BE%E7%89%872.png?imageView2/2/format/webp/" style="border:0px; box-sizing:border-box; height:auto; max-width:100%; vertical-align:middle" /></span><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 20.52pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">四、使用方法</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、在電池盒內(nèi)，裝入1.5V1號(hào)手電筒電池4~6節(jié)并聯(lián)使用和2節(jié)6F22、9V并聯(lián)使用，此時(shí)電橋就能正常工作。如用外接直流電源1.5~2V時(shí)，電池盒內(nèi)的1.5V電池，應(yīng)預(yù)先全部取出。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、“B</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">”開(kāi)關(guān)扳到通位置，等穩(wěn)定后（約5分鐘），調(diào)節(jié)檢流計(jì)指針在零位。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、靈敏度旋鈕放在*低位置。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">4、將被測(cè)電阻，按四端連接法，接在電橋相應(yīng)的C</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、P</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、P</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">2</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、C</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">2</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、的接線柱上。如下圖所示，AB之間為被測(cè)電阻。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px 0pt 31.5pt; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; text-indent: -31.5pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"> <img alt="" src="http://y1.yizimg.com/ComFolder/486823//201202/%E5%9B%BE%E7%89%873.png?imageView2/2/format/webp/" style="border:0px; box-sizing:border-box; height:auto; max-width:100%; vertical-align:middle; width:261" /></span><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">5、估計(jì)被測(cè)電阻值大小，選擇適當(dāng)倍率位置，先按“G”按鈕，再按“B”按鈕，調(diào)節(jié)步進(jìn)讀數(shù)和滑線讀數(shù)，使檢流計(jì)指針在零位上。如發(fā)現(xiàn)檢流計(jì)靈敏度不夠，應(yīng)增加其靈敏度，移動(dòng)滑線盤(pán)4小格，檢流計(jì)指針偏離零位約1格，就能滿足測(cè)量要求。在改變靈敏度時(shí)，會(huì)引起檢流計(jì)指針偏離零位，在測(cè)量之前，隨時(shí)都可以調(diào)節(jié)檢流計(jì)零位。被測(cè)電阻按下式計(jì)算：</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">被測(cè)電阻值=倍率讀數(shù)×（步進(jìn)讀數(shù)+滑線讀數(shù)）</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">被測(cè)電阻范圍與倍率位置選擇按下表：</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><table style="border-collapse:collapse; border-spacing:0px; box-sizing:border-box; font-family:microsoft yahei,arial,sans-serif; margin-left:60.6pt; padding:0pt 5.4pt; table-layout:inherit"><tbody style="box-sizing: border-box;"><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: 0.5pt; border-style: solid; border-color: rgb(0, 0, 0); width: 144pt;" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">倍率</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: 0.5pt 0.5pt 0.5pt medium; border-style: solid solid solid none; border-top-color: rgb(0, 0, 0); border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">被測(cè)電阻范圍（</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">）</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt; border-style: none solid solid; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 144pt; border-bottom-color: rgb(0, 0, 0); border-left-color: rgb(0, 0, 0);" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">×100</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt medium; border-style: none solid solid none; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1.1~11</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt; border-style: none solid solid; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 144pt; border-bottom-color: rgb(0, 0, 0); border-left-color: rgb(0, 0, 0);" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">×10</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt medium; border-style: none solid solid none; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">0.11~1.1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt; border-style: none solid solid; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 144pt; border-bottom-color: rgb(0, 0, 0); border-left-color: rgb(0, 0, 0);" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">×1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt medium; border-style: none solid solid none; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">0.011~0.11</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt; border-style: none solid solid; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 144pt; border-bottom-color: rgb(0, 0, 0); border-left-color: rgb(0, 0, 0);" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">×0.1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt medium; border-style: none solid solid none; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">0.0011~0.011</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr><tr style="box-sizing: border-box;"><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt; border-style: none solid solid; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 144pt; border-bottom-color: rgb(0, 0, 0); border-left-color: rgb(0, 0, 0);" valign="middle" width="192"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">×0.01</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td><td style="box-sizing: border-box; padding: 0pt 5.4pt; border-width: medium 0.5pt 0.5pt medium; border-style: none solid solid none; border-top-color: initial; border-right-color: rgb(0, 0, 0); width: 189pt; border-bottom-color: rgb(0, 0, 0); border-left-color: initial;" valign="middle" width="252"><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; text-align: center;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">0.00001~0.0011</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p></td></tr></tbody></table><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">QJ44型晶體管檢流計(jì)簡(jiǎn)易修理</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">晶體管檢流計(jì)常見(jiàn)故障有以下幾種：不工作、靈敏度低、調(diào)零調(diào)不到零等等。如果有條件，可以用示波器、毫伏表、訊號(hào)發(fā)生器等電子儀器來(lái)檢查故障。在這里我們只介紹簡(jiǎn)易的檢修方法，供在修理時(shí)參考。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 30pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">一、對(duì)分法</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 29.04pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">在修理時(shí)，有些同志感到無(wú)從下手，或是無(wú)目的地焊這拆那，往往故障未查出，反把好的元件弄壞。用對(duì)分法檢查故障，即能避免全</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">面檢查而浪費(fèi)時(shí)間，又能不至無(wú)故損壞元件。所謂對(duì)分法，即在故障范圍中，選擇一點(diǎn)進(jìn)行檢查，判別故障發(fā)生在此點(diǎn)前，還是在此點(diǎn)后，這樣就能肯定一半，然后在剩下的故障范圍內(nèi)，再找一點(diǎn)進(jìn)行檢查，按此方法檢查下去，就會(huì)很快地找到故障所在點(diǎn)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、例如在電源、表頭和訊號(hào)輸入均*的情況下；晶體管檢流計(jì)不工作。用對(duì)分法來(lái)檢查故障，在圖1中，選擇(5)點(diǎn)作為檢查點(diǎn)，調(diào)節(jié)W，如果表頭指針相應(yīng)會(huì)偏轉(zhuǎn)，則來(lái)自振蕩器的訊號(hào)能從(6)點(diǎn)（BG</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">3</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">發(fā)射極）輸入而進(jìn)行放大、解調(diào)，可見(jiàn)振蕩器，解調(diào)器的工作正常。而交流放大器是一個(gè)整體，BG</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">2</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">—BG</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">5</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">也不會(huì)有問(wèn)題。顯然故障一下就縮小到調(diào)制器所屬范圍內(nèi)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、如果調(diào)節(jié)W，表頭指針無(wú)反應(yīng)，或反應(yīng)不明顯，則問(wèn)題在調(diào)制以外的回路中，再選(4)點(diǎn)，解調(diào)器輸入端，用一導(dǎo)線，一頭接觸(4)點(diǎn)，另一頭分別與(7)和(8)兩點(diǎn)相接觸，如果表頭指針相應(yīng)打向兩邊，則解調(diào)器和振蕩器工作正常，故障發(fā)生在交流放大器內(nèi)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 30pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、在剩下的振蕩器和解調(diào)器中選擇(9)和(10)兩點(diǎn)，用萬(wàn)用表交流電壓檔測(cè)量以上兩對(duì)地之間的交流電壓，若分別約1V和1.5V，表明振蕩器工作正常。*后只需檢查解調(diào)器就是了。檢查解調(diào)器除了檢查電路是否有假焊外，主要判別場(chǎng)效應(yīng)管是否損壞。也可檢查(7)和(8)兩點(diǎn)對(duì)地電壓，用萬(wàn)用表測(cè)量時(shí)，須串接一個(gè)5μF以上電容。如果兩點(diǎn)對(duì)地電壓很低，或其中一點(diǎn)不正常，則振蕩器可能正常，而調(diào)制或解調(diào)中場(chǎng)效應(yīng)管柵極嚴(yán)重漏電。如果(7)和(8)兩點(diǎn)對(duì)地?zé)o電壓，再用直流電壓表測(cè)(7)和(8)對(duì)地直流電壓，就可查出故障點(diǎn)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">二、也可以用訊號(hào)注入法檢查晶體管檢流計(jì)</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">在被修理印刷板上找到圖1所示各對(duì)應(yīng)點(diǎn)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、將一手指觸及(1)，另一手指觸及(11)，此時(shí)表頭指針打向一邊，</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">說(shuō)明直流正電壓能從(1)輸入，(1)以后所有電路均無(wú)問(wèn)題，而檢修(1)以前的線路是十分簡(jiǎn)單的。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、如果直流信號(hào)輸不進(jìn)，則用交流輸入：將一手指觸及(2)或(3)，另一手指先后觸及(7)和(8)，此時(shí)表頭指針應(yīng)分別打向兩邊。如果觸及(7)和(8)，表頭指針向一個(gè)方向偏轉(zhuǎn)，而另一方向無(wú)指示，則問(wèn)題在解調(diào)器。表頭指針無(wú)指示，則問(wèn)題在交流放大器和解調(diào)器線路中。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 22.08pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">三、電流電壓測(cè)量法</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">用萬(wàn)用表測(cè)量晶體管檢流計(jì)總電流約0.8mA（電源電壓在9V時(shí)），也可以測(cè)量交流放大器的各點(diǎn)工作電壓和振蕩器輸出電壓來(lái)判斷。如果測(cè)量數(shù)值與典型數(shù)據(jù)偏差太大，說(shuō)明線路有問(wèn)題。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">四、修理注意事項(xiàng)</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、在修理晶體管檢流計(jì)時(shí)，可用以上三種方法來(lái)確定故障點(diǎn)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、在焊接3DO2場(chǎng)效應(yīng)管時(shí)，烙鐵應(yīng)很好接地，*好斷電焊接。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、在檢查元件時(shí)，應(yīng)重點(diǎn)檢查場(chǎng)效應(yīng)管是否損壞，電容器容量誤差無(wú)關(guān)緊要，而對(duì)電容器漏電要求較高，檢測(cè)元件方法請(qǐng)參閱有關(guān)資料。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">4、焊接元件時(shí)，應(yīng)使用24W烙鐵，并防止印刷板線條短路和翹起。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">5、晶體管檢流計(jì)原理圖和裝配圖中所標(biāo)晶體管型號(hào)僅供參考。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; text-indent: 21pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"><o:p style="box-sizing: border-box;"><img alt="" src="http://y1.yizimg.com/ComFolder/486823//201202/%E5%9B%BE%E7%89%874.png?imageView2/2/format/webp/" style="border:0px; box-sizing:border-box; height:auto; max-width:100%; vertical-align:middle; width:532" /></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; text-indent: 21pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:10.5pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">五、注意事項(xiàng)和維護(hù)保養(yǎng)</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、在測(cè)電感電路的直流電阻時(shí)，應(yīng)先按下“B”按鈕，再按下“G”按鈕，斷開(kāi)時(shí)，應(yīng)先斷開(kāi)“G”按鈕，后斷開(kāi)“B”按鈕。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">2、測(cè)量0.1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">以下阻值時(shí)，“B”按鈕應(yīng)間歇使用。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、在測(cè)量0.1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">以下阻值時(shí)，C</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、P</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、P</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">2</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、C</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">2</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">、接線柱到被測(cè)量電阻之間的連接導(dǎo)線電阻為0.005Ω~0.01Ω；測(cè)量其它阻值時(shí)，連接導(dǎo)線電阻可不大于0.05</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">Ω</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">4、電橋使用完畢后，“B”與“G”按鈕應(yīng)松開(kāi)。“B</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt; vertical-align:sub">1</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">”開(kāi)關(guān)應(yīng)扳向“斷”位置，避免浪費(fèi)晶體管檢流計(jì)放大工作電源。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">5、如電橋長(zhǎng)期擱置不用，應(yīng)將電池取出。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 18pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">6、如電橋長(zhǎng)期擱置不用，在接觸處可能產(chǎn)生氧化，造成接觸不佳，使接觸良好，再涂上一薄層無(wú)酸性凡士林，予以保護(hù)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">7、電橋應(yīng)貯放在環(huán)境溫度+5℃~+45℃，相對(duì)濕度小于30%的條件下，室內(nèi)空氣中不應(yīng)含有能腐蝕儀器的氣體和有害雜質(zhì)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">8、儀器應(yīng)保持清潔，并避免直接曝曬和劇烈震動(dòng)。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">9、儀器在使用中，如發(fā)現(xiàn)檢流計(jì)靈敏度顯著下降，可能因電池壽命完畢引起，因更換新的電池。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">10、在用戶(hù)遵守技術(shù)條件所規(guī)定的使用、運(yùn)輸及儲(chǔ)藏的條件下，從交貨之日起一年內(nèi)，因制造質(zhì)量不佳而發(fā)生損壞或不能正常</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">工作時(shí)，制造廠應(yīng)免費(fèi)為用戶(hù)修理產(chǎn)品，如無(wú)法修好時(shí)，則應(yīng)免費(fèi)給用戶(hù)更換部件。</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">六、儀器成套性</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 42pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">隨同產(chǎn)品供應(yīng)的文件有：</span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 48pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">1、使用說(shuō)明書(shū) </span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 24pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"> 2、產(chǎn)品合格證 </span><span style="box-sizing:border-box; font-family:宋體; font-size:12pt"><o:p style="box-sizing: border-box;"></o:p></span></p><p class="p0" style="box-sizing: border-box; margin: 0pt 0px; color: rgb(68, 68, 68); font-family: "Microsoft YaHei", Arial, sans-serif; font-size: 12px; line-height: 16pt; text-indent: 48pt;"><span style="box-sizing:border-box; font-family:宋體; font-size:12pt">3、裝箱單</span></p> <div id="yq00aqiue" class="clear"></div> </div> <div id="yq00aqiue" class="article"> <p>上一篇：<a href="/Article-2289399.html">DS-702C電樞檢驗(yàn)儀原理</a></p> <p>下一篇：<a href="/Article-2287816.html">QJ57型直流電阻電橋用途</a></p> </div> <div id="yq00aqiue" class="clear"></div> </div> </div> <div id="yq00aqiue" class="n-9"> <div id="yq00aqiue" class="c-right"> <div id="yq00aqiue" class="c-1 r-pro"> <div id="yq00aqiue" class="c-left"> <div id="yq00aqiue" class="h-2"><a href="/products.html">產(chǎn)品分類(lèi)</a></div> 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