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class="clear"></div> </div> </div> <div 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> > AZ19直流檢流計(jì)講解</span></div>  <div id="yq00aqiue" class="n-3 c-news"> <div id="yq00aqiue" class="newsnr"> <h1>AZ19直流檢流計(jì)講解</h1> <p class="source"><span>日期：2024-05-14</span><span>瀏覽：1126次</span></p> <div> <p><strong><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">一、AZ19直流檢流計(jì)講解</span></span></strong><strong></strong></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">本儀器是采用第四代斬波穩(wěn)壓零技術(shù)集成運(yùn)算放大器為核心組成的電子檢流計(jì)；它具有高增益、低漂移、低噪聲。本儀器用大表面頭，使視野清晰。</span><span style="font-family:Times New Roman">AZ19</span><span style="font-family:宋體">型電子檢流計(jì)可用于各種電橋、電位差計(jì)指示不平衡信號(hào)，也可用低噪聲、低漂移直流放大器或直接當(dāng)直流電壓表使用。</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:宋體">儀器主要特點(diǎn)：</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:Times New Roman">1</span><span style="font-family:宋體">、儀器采用三節(jié)</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">號(hào)電池串聯(lián)供電，以排除市電引起的共模干擾。</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:Times New Roman">2</span><span style="font-family:宋體">、本儀器靈敏可替代</span><span style="font-family:Times New Roman">AC15/1~AC15/6</span><span style="font-family:宋體">各型直流復(fù)射檢流計(jì)，使用時(shí)不需考慮外臨界電阻的尼匹問(wèn)題；它具有輸入過(guò)壓保護(hù)，其抗震性能用抗沖性能均強(qiáng)。</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:Times New Roman">3</span><span style="font-family:宋體">、</span><span style="font-family:Times New Roman">AZ19</span><span style="font-family:宋體">型電子檢流計(jì)作為電橋、電位差計(jì)不平衡信號(hào)指示用時(shí)，設(shè)有非線性量程檔，在</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V </span><span style="font-family:宋體">范圍內(nèi)具有±</span><span style="font-family:Times New Roman">30</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span><span style="font-family:宋體">檔靈敏度；當(dāng)輸入信號(hào)強(qiáng)時(shí)，壓縮輸出運(yùn)態(tài)范圍達(dá)</span><span style="font-family:Times New Roman">30</span><span style="font-family:宋體">分貝以上。</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:Times New Roman">4</span><span style="font-family:宋體">、儀器采用各種屏蔽措施，因此具有較高的抗干擾能力</span></span></p><p><strong style="text-align: center;"><span style="font-family: 宋體;">二，AZ19直流檢流計(jì)講解主要技術(shù)指標(biāo)</span></strong></p><p style="text-align:center"><strong></strong></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">、使用條件：</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">）環(huán)境溫度：</span><span style="font-family:Times New Roman">0</span><span style="font-family:宋體">℃</span><span style="font-family:Times New Roman">~</span><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">40</span><span style="font-family:宋體">℃；</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">）環(huán)境濕度：小于</span><span style="font-family:Times New Roman">80%</span><span style="font-family:宋體">（</span><span style="font-family:Times New Roman">RH</span><span style="font-family:宋體">）</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">（</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">）避免陽(yáng)光直射，空氣中無(wú)腐蝕性氣體，避免嚴(yán)重振動(dòng)。</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">，電源：使用三節(jié)一號(hào)干電池供電。</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">、儀器基本參數(shù)如下表：</span></span></p><div id="yq00aqiue" class="tabledivclass" style="width: 99%; float: left;"><table border="1" cellspacing="0" align="left" width="584" style="max-width: 748px;"><tbody><tr style="height:41px" class="firstRow"><td width="117" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">量程</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">輸入阻抗</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">電壓常數(shù)</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">電流常數(shù)</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">響應(yīng)時(shí)間</span></span></p></td></tr><tr style="height:39px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">30</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">10K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">4</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:41px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">100</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">20K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.1</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:39px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">300</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">20K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">5</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.25</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:41px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">非線性</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">10K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.05</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">4</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:39px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">1mV</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">100K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">20</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.2</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:39px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">3mV</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">100K</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">50</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:41px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">10mV</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">1M</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">200</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.2</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr><tr style="height:41px"><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">30mV</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">1M</span><span style="font-family:宋體">Ω</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">500</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">10</span></span><sup><span style="font-family:宋體;font-size:14px;vertical-align:super"><span style="font-family:Times New Roman">-9</span></span></sup><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">A/</span><span style="font-family:宋體">格</span></span></p></td><td width="117" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">＜</span><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">秒</span></span></p></td></tr></tbody></table></div><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">注：非線性檔電壓常數(shù)和電流常數(shù)，系指零點(diǎn)附近。</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">4</span><span style="font-family:宋體">、電壓噪聲：≤±</span><span style="font-family:Times New Roman">0.25</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span><sub><span style=";font-family:宋體;font-size:14px;vertical-align:sub"><span style="font-family:Times New Roman">p-u</span></span></sub><sub></sub></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">5</span><span style="font-family:宋體">、零電壓漂移：≤±</span><span style="font-family:Times New Roman">2.5</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/4</span><span style="font-family:宋體">小時(shí)</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">6</span><span style="font-family:宋體">、指示誤差</span><span style="font-family:Times New Roman">: </span><span style="font-family:宋體">≤±</span><span style="font-family:Times New Roman">5%</span></span><span style=";font-family:'Times New Roman';font-size:14px">;</span><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">輸出端輸出值</span><span style="font-family:Times New Roman">0~</span><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">5mV </span><span style="font-family:宋體">誤差</span><span style="font-family:Times New Roman">:</span><span style="font-family:宋體">≤±</span><span style="font-family:Times New Roman">5%</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">7</span><span style="font-family:宋體">、對(duì)市電串模抑制比：大于</span><span style="font-family:Times New Roman">60db</span><span style="font-family:宋體">；對(duì)市電共模抑制比：大于</span><span style="font-family:Times New Roman">120db</span><span style="font-family:宋體">（包括直流）</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">8</span><span style="font-family:宋體">、溫度系數(shù)：≤</span><span style="font-family:Times New Roman">0.5</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V/</span><span style="font-family:宋體">℃；</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">9</span><span style="font-family:宋體">、非線性壓縮比：≥</span><span style="font-family:Times New Roman">31 db</span><span style="font-family:宋體">（即</span><span style="font-family:Times New Roman">31</span><span style="font-family:宋體">倍）</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">、耗電：≤</span><span style="font-family:Times New Roman">10mw</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">11</span><span style="font-family:宋體">、外形尺寸：</span><span style="font-family:Times New Roman">170</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">160</span><span style="font-family:宋體">×</span><span style="font-family:Times New Roman">230</span></span></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">12</span><span style="font-family:宋體">、重量約</span><span style="font-family:Times New Roman">2kg</span></span></p><p><strong style="text-align: center;"><span style="font-family: 宋體;">三、AZ19直流檢流計(jì)講解基本工作原理</span></strong></p><p style="text-align:center"><strong></strong></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:宋體">直流信號(hào)由輸入端入，經(jīng)量程衰減，通過(guò)過(guò)壓保護(hù)及低通濾波后，加到放大器上，放大量由反饋網(wǎng)絡(luò)選擇。信號(hào)滿量程輸入時(shí)，放大器輸出值為</span><span style="font-family:Times New Roman">300mv.</span><span style="font-family:宋體">。放大器一路輸出經(jīng)限流電阻限流后，送入寬表面頭，偏移顯示所測(cè)電壓大小和極性。另一路經(jīng)</span><span style="font-family:Times New Roman">60</span><span style="font-family:宋體">倍衰減后供檢流計(jì)背面輸出端輸出，輸出阻抗為</span><span style="font-family:Times New Roman">339</span><span style="font-family:宋體">Ω。放大器使用負(fù)電源由</span><span style="font-family:Times New Roman">ICL7660</span><span style="font-family:宋體">提供。</span></span></p><p><strong style="text-align: center; text-indent: 29px;"><span style="font-family: 宋體;">四、AZ19直流檢流計(jì)講解使用</span></strong></p><p style="text-indent:29px;text-align:center"><strong></strong></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">、使用前的準(zhǔn)備</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">打開(kāi)檢流計(jì)后面的電池蓋，按極性裝入三節(jié)</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋體">號(hào)電池，蓋好電池蓋。量程開(kāi)關(guān)打到“調(diào)零"檔，旋轉(zhuǎn)調(diào)零旋鈕，檢查表針左右復(fù)蓋情況。再將量程開(kāi)關(guān)打到“電池檢查"檔，若指針低于±</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">刻度線的</span><span style="font-family:Times New Roman">+7</span><span style="font-family:宋體">時(shí)，說(shuō)明電量不足，應(yīng)考慮更換電池。如果電池是新的，可以不進(jìn)行電池檢查。</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">檢流計(jì)經(jīng)</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">分鐘左右時(shí)間預(yù)熱后，將量程開(kāi)關(guān)打至“調(diào)零"檔，進(jìn)行準(zhǔn)確的調(diào)零后即可使用。</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">2</span><span style="font-family:宋體">、作直流電橋或電位差計(jì)指零用</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">將電橋或電位差計(jì)指零端子和檢流計(jì)輸入端子相連，選擇合適的量程（包括</span><span style="font-family:宋體">“非線性"檔）即可使用。</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">本檢流計(jì)調(diào)零，是在輸入端子采用電流相加法補(bǔ)償輸入失調(diào)電壓完成，準(zhǔn)確調(diào)零后，檢流計(jì)對(duì)信號(hào)源反射電壓為零。如果信號(hào)源是直流電橋或電位差計(jì)。檢流計(jì)在檢零放大時(shí)，指針有時(shí)不應(yīng)有的偏移，說(shuō)明信號(hào)源內(nèi)，存在熱電勢(shì)或觸電勢(shì)。如果熱電勢(shì)或接觸電勢(shì)可不予考慮，則用調(diào)零電位器予以補(bǔ)嘗，使指針重新指向零點(diǎn)。</span> </span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">3</span><span style="font-family:宋體">、作低噪聲低漂移直流放大器用</span></span></p><p style="text-indent:29px"><span style=";font-family:宋體;font-size:14px"><span style="font-family:宋體">需放大的信號(hào)接到檢流計(jì)輸入端上，從背面輸出端輸出，下表給出了各檔和放大倍</span></span></p><p style="width: 99%; float: left;"><br/></p><div id="yq00aqiue" class="tabledivclass" style="width: 99%; float: left;"><br/><br/><table border="1" cellspacing="0" align="left" width="596" style="max-width: 748px;"><tbody><tr style="height:35px" class="firstRow"><td width="149" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">量程</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">放大倍數(shù)</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">量程</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-width: 1px; border-style: solid; border-color: windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">放大倍數(shù)</span></span></p></td></tr><tr style="height:33px"><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">300</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">167</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">3mV</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">1.7</span></span></p></td></tr><tr style="height:35px"><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">50</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">3mV</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.5</span></span></p></td></tr><tr style="height:33px"><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">300</span><span style="font-family:宋體">μ</span><span style="font-family:Times New Roman">V</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">17</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">3mV</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">0.17</span></span></p></td></tr><tr style="height:35px"><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:宋體">±</span><span style="font-family:Times New Roman">1MV</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><p style="text-align:center"><span style="font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">5</span></span></p></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><br/></td><td width="149" valign="top" style="padding: 0px 7px; border-left: 1px solid windowtext; border-right: 1px solid windowtext; border-top: none; border-bottom: 1px solid windowtext;"><br/></td></tr></tbody></table></div><p><br/></p><p><span style=";font-family:宋體;font-size:14px"><span style="font-family:Times New Roman">4</span><span style="font-family:宋體">、作直流電壓表使用</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:宋體">作直流電壓表使用時(shí)，直接從表頭讀取電壓值</span> </span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:Times New Roman">5</span><span style="font-family:宋體">、“接地"端</span></span></p><p><span style=";font-family:宋體;font-size:14px"> <span style="font-family:宋體">儀器前面板上設(shè)有</span><span style="font-family:宋體">“接地"端，該端和儀器外殼屏蔽層相連。如果外部干擾嚴(yán)重時(shí)，可將該端和信號(hào)源外殼相連，接至大地，這時(shí)輸入線最好改用雙絞屏蔽線。一般情況下，“接地"端可以不用。</span></span></p><p><br/></p> <div id="yq00aqiue" class="clear"></div> </div> <div id="yq00aqiue" class="article"> <p>上一篇：<a href="/Article-3691123.html">JQ23B直流電阻電橋主要技術(shù)參數(shù)</a></p> <p>下一篇：<a href="/Article-3689653.html">ZX79D＋型兆歐表標(biāo)準(zhǔn)電阻器特點(diǎn)技術(shù)參數(shù)</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> <ul> <li><a href="/ParentList-1388067.html" onmouseover="showsubmenu('大電流發(fā)生器')" class="yj">大電流發(fā)生器</a> <div 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