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sans-serif">（溶氧儀電極）的校正問(wèn)題是有很多的人遇到這樣的問(wèn)題，但是很少能夠得到解決，都是靠自己的實(shí)際經(jīng)驗，那樣的話(huà)具有很強的錯誤指導性，一定要有科學(xué)的指導方法。zui常見(jiàn)說(shuō)明的是PH計電極的校正說(shuō)明。今天就溶氧儀的電極的校正來(lái)簡(jiǎn)單說(shuō)明一下，讓大家實(shí)際操作溶氧儀時(shí)不再困惑不解。本文從溶氧儀電極的如何校正（或標定）的方法和電極日后的使用維護上作出解釋說(shuō)明。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　　一、 </span></font><font face="">溶氧儀</font></a><font face=""><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">的標定方法：溶氧儀一般可采用標準液標定或現場(chǎng)取樣標定。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）溶氧儀標準溶液標定法：標準溶液標定一般采用兩點(diǎn)標定，即零點(diǎn)標定和量程標定。零點(diǎn)標定溶液可采用2%的Na2SO3 溶液。量程標定溶液可根據儀表測量量程選擇4M 的KCl 溶液（2mg/L）；50%的甲醇溶液（21.9mg/L）。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）溶氧儀現場(chǎng)取樣標定法（Winkler 法）：在溶氧儀實(shí)際使用中，多采用Winkler 方法對溶解氧分析儀進(jìn)行現場(chǎng)標定。使用該方法時(shí)存在兩種情況：取樣時(shí)儀表讀數為M1,化驗分析值為A，對儀表進(jìn)行標定時(shí)儀表讀數仍為M1,這時(shí)只須調整儀表讀數等于A(yíng)即可；取樣時(shí)儀表讀數為M1,化驗分析值為A,對儀表進(jìn)行標定時(shí)儀表讀數改變?yōu)镸2，這時(shí)就不能將調整儀表讀數等于A(yíng),而應將儀表讀數調整為1MA×M2。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　　二、</span></font><font face="">溶氧儀電極</font></a><font face=""><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">的使用維護 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）1～2 周應清洗一次溶氧儀電極，如果膜片上有污染物，會(huì )引起測量誤差。清洗時(shí)應小心，注意不要損壞膜片。將溶氧儀電極放入清水中涮洗，如污物不能洗去，用軟布或棉布小心擦洗。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）2～3 月應重新校驗一次溶氧儀電極的零點(diǎn)和量程。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）溶氧儀電極的再生大約1 年左右進(jìn)行一次。當測量范圍調整不過(guò)來(lái)，就需要對溶解氧電極再生。電極再生包括更換內部電解液、更換膜片、清洗銀電極。如果觀(guān)察銀電極有氧化現象，可用細砂紙拋光。 </span><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /><span style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif">　?。?）在使用中如發(fā)現溶氧儀電極泄露，就必須更換電解液。 </span></font><br style="line-height: 30px; font-family: Tahoma, 宋體, Helvetica, sans-serif" /> </p> </div> <div id="jixe8a0" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-549989.html">工業(yè)電導率儀檢定時(shí)的接線(xiàn)方法范例</a></li> <li>下一篇：<a href="/Article-545505.html">PH計電極中毒損壞的原因</a></li> </ul> </div> </div>   <div id="mawi3kz" class="ly_foot"> <div 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