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class="w1200 clear"> <div id="hvjh9xd" class="ny_newsdetail clear"> <h1 class="ny_newsdetail_title">PH酸度計(jì)的構(gòu)成部件及種類</h1> <div id="hvjh9xd" class="ny_newsdetail_tips">更新時(shí)間：2014-11-06 | 點(diǎn)擊率：2787</div> <div id="hvjh9xd" class="ny_newsdetail_con"> <span style="font-size: 12px;"> <strong><a href="http://m.cn-liling.com/">ph酸度計(jì)</a></strong>可以根據(jù)應(yīng)用的場(chǎng)合、精度需求、讀數(shù)指示和器件型號(hào)進(jìn)行分類： </span><div> 1、根據(jù)應(yīng)用場(chǎng)合分類：分為筆試ph計(jì)、便攜式ph計(jì)、臺(tái)式ph計(jì)和工業(yè)ph計(jì)等。筆試ph計(jì)主要用途是取代ph試紙，突出精度低、使用方便的特點(diǎn)。便攜式PH酸度計(jì)主要用在現(xiàn)場(chǎng)或者野外測(cè)試方面，具有高的精度和完善的功能。臺(tái)式ph計(jì)是一種高精度的分析儀表，要求高精度、功能全面，還要擁有報(bào)警和控制功能，以及安裝、清洗、抗干擾等等特點(diǎn)。 </div><div> 2、根據(jù)儀器精度分類：可分為0.2級(jí)、0.1級(jí)、0.02級(jí)、0.01級(jí)、0.001級(jí)，數(shù)字越低表示精度越高。 </div><div> 3、根據(jù)讀數(shù)指示分類：科分為指針式和數(shù)字顯示（數(shù)顯）兩種。現(xiàn)在指針式PH酸度計(jì)很少使用了，但是指針式的儀表能夠顯示數(shù)據(jù)的連續(xù)變化過程，所以在滴定分析中還是很有用的。 </div><div> 4、根據(jù)器件類型分類：可分為晶體管式、集成電路式、單片機(jī)微電腦式，現(xiàn)在很多是應(yīng)用微電腦芯片，可以大大減少儀器體積和單片機(jī)成本，不過芯片的開發(fā)成本很貴。 </div><div> <strong>ph酸度計(jì)</strong>的構(gòu)成部件有哪些？ </div><div> <strong>ph酸度計(jì)</strong>zui主要的功能和zui精密的地方就是進(jìn)行典韋測(cè)量，那么ph計(jì)有哪幾個(gè)部件構(gòu)成： </div><div> 1、一個(gè)參比電極：維持一個(gè)恒定的電位，作為測(cè)量各種偏離電位的對(duì)照； </div><div> 2、一個(gè)玻璃電極：其電位取決于周圍溶液的ph； </div><div> 3、一個(gè)電流計(jì)：電流計(jì)可以在電阻極大地電路中測(cè)量出微小的電位差。 </div><div> <strong>PH酸度計(jì)</strong>的主要部件是精密的電位計(jì)。測(cè)定時(shí)把復(fù)合電極插在被測(cè)溶液中，由于被測(cè)溶液的酸度(H+濃度)不同而產(chǎn)生不同的電動(dòng)勢(shì)，將它通過直流放大器放大，zui后由讀數(shù)指示器(電壓表)指出被測(cè)溶液的pH值。 </div><div><strong>PH酸度計(jì)</strong>的正確使用與維護(hù)方法 </div><div> 一、正確使用與保養(yǎng)電極 </div><div> 目前實(shí)驗(yàn)室使用的電極都是復(fù)合電極，其優(yōu)點(diǎn)是使用方便，不受氧化性或還原性物質(zhì)的影響，且平衡速度較快。使用時(shí)，將電極加液口上所套的橡膠套和下端的橡皮套全取下，以保持電極內(nèi)氯化鉀溶液的液壓差。下面就把電極的使用與維護(hù)簡(jiǎn)單作一介紹： </div><div> ⒈復(fù)合電極不用時(shí)，可充分浸泡3M氯化鉀溶液中。切忌用洗滌液或其他吸水性試劑浸洗。 </div><div> ⒉使用前，檢查玻璃電極前端的球泡。正常情況下，電極應(yīng)該透明而無裂紋；球泡內(nèi)要充滿溶液，不能有氣泡存在。 </div><div> ⒊測(cè)量濃度較大的溶液時(shí)，盡量縮短測(cè)量時(shí)間，用后仔細(xì)清洗，防止被測(cè)液粘附在電極上而污染電極。 </div><div> ⒋清洗電極后，不要用濾紙擦拭玻璃膜，而應(yīng)用濾紙吸干,避免損壞玻璃薄膜、防止交叉污染，影響測(cè)量精度。 </div><div> ⒌測(cè)量中注意電極的銀—氯化銀內(nèi)參比電極應(yīng)浸入到球泡內(nèi)氯化物緩沖溶液中，避免電計(jì)顯示部分出現(xiàn)數(shù)字亂跳現(xiàn)象。使用時(shí)，注意將電極輕輕甩幾下。 </div><div> ⒍電極不能用于強(qiáng)酸、強(qiáng)堿或其他腐蝕性溶液。 </div><div> ⒎嚴(yán)禁在脫水性介質(zhì)如無水乙醇、重鉻酸鉀等中使用。 </div> </div> <div id="hvjh9xd" class="ny_PrevNext"> <div id="hvjh9xd" class="Prev">上一篇： <a href="/Article-718890.html">熒光法溶解氧測(cè)定儀型號(hào)hq30d是什么 </a></div> <div id="hvjh9xd" class="Next">下一篇： <a href="/Article-706636.html">抗生素檢測(cè)儀的性能特點(diǎn)</a></div> </div> </div> </div> </div> </div>   <div id="hvjh9xd" class="pc_foot"> <div id="hvjh9xd" class="pc_ft_main w1200 clear"> <div id="hvjh9xd" class="ft_list"> <ul> <li><b>關(guān)于我們</b><a href="/aboutus.html">公司簡(jiǎn)介</a><a href="/news.html">新聞動(dòng)態(tài)</a><a href="/article.html">技術(shù)文章</a></li> <li><b>產(chǎn)品展示</b> <a 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