2.2.1  儀(yi)器(qi)檢測原理為熱重分析(xi)法(fa)

它將遠紅外加(jia)熱(re)(re)設備與稱量(liang)用的(de)電子天平(ping)結合在一起，在特定(ding)的(de)氣(qi)氛條件、規(gui)定(ding)的(de)溫度、規(gui)定(ding)的(de)時間內(nei)稱量(liang)受熱(re)(re)過程中的(de)試(shi)樣質量(liang)，以此計(ji)算(suan)出試(shi)樣的(de)水分、灰(hui)分和(he)揮發分等工業(ye)分析指(zhi)標。

2.2.2  儀器工作過程

通過計算機控制測試主機來測定試樣的水分(fen)、揮發(fa)分(fen)和灰分(fen)。

2.2.3  測(ce)定(ding)流程

運行(xing)儀(yi)器(qi)的測(ce)試(shi)程序，進入工作(zuo)測(ce)試(shi)菜單，輸入相關(guan)的試(shi)樣信息后儀(yi)器(qi)自動稱(cheng)量(liang)(liang)(liang)空坩(gan)堝(guo)(guo)，空坩(gan)堝(guo)(guo)稱(cheng)量(liang)(liang)(liang)完(wan)畢，系(xi)(xi)(xi)(xi)統(tong)自動打(da)(da)(da)(da)(da)開(kai)(kai)(kai)(kai)(kai)上蓋(gai)，提示放入試(shi)樣，然(ran)后系(xi)(xi)(xi)(xi)統(tong)稱(cheng)量(liang)(liang)(liang)試(shi)樣質(zhi)量(liang)(liang)(liang)并開(kai)(kai)(kai)(kai)(kai)始加熱。升(sheng)(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)到145℃左右恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)20分鐘（指按國標方法，溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度與恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)時(shi)(shi)(shi)(shi)間(jian)可自定(ding)義設置）后開(kai)(kai)(kai)(kai)(kai)始稱(cheng)量(liang)(liang)(liang)坩(gan)堝(guo)(guo)，當坩(gan)堝(guo)(guo)質(zhi)量(liang)(liang)(liang)變化不超過系(xi)(xi)(xi)(xi)統(tong)設定(ding)值(zhi)（默(mo)認(ren)0.0007克）時(shi)(shi)(shi)(shi)水分分析結束(shu)，系(xi)(xi)(xi)(xi)統(tong)報(bao)(bao)出水分測(ce)定(ding)結果，此時(shi)(shi)(shi)(shi)系(xi)(xi)(xi)(xi)統(tong)會(hui)自動打(da)(da)(da)(da)(da)開(kai)(kai)(kai)(kai)(kai)上蓋(gai)，提示加坩(gan)堝(guo)(guo)蓋(gai)，儀(yi)器(qi)自動稱(cheng)量(liang)(liang)(liang)加坩(gan)堝(guo)(guo)蓋(gai)質(zhi)量(liang)(liang)(liang)，然(ran)后系(xi)(xi)(xi)(xi)統(tong)控(kong)制高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)爐(lu)繼續升(sheng)(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)，目(mu)標溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度900℃（系(xi)(xi)(xi)(xi)統(tong)自動打(da)(da)(da)(da)(da)開(kai)(kai)(kai)(kai)(kai)氮氣(qi)(qi)閥，向高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)爐(lu)內通氮氣(qi)(qi)，氣(qi)(qi)體流量(liang)(liang)(liang)控(kong)制在4～5L/min），高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)爐(lu)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度升(sheng)(sheng)到900℃，恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)規定(ding)的時(shi)(shi)(shi)(shi)間(jian)后，系(xi)(xi)(xi)(xi)統(tong)會(hui)自動打(da)(da)(da)(da)(da)開(kai)(kai)(kai)(kai)(kai)上蓋(gai)開(kai)(kai)(kai)(kai)(kai)始降(jiang)(jiang)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)，當高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)爐(lu)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)度降(jiang)(jiang)到設定(ding)值(zhi)時(shi)(shi)(shi)(shi)，儀(yi)器(qi)自動稱(cheng)量(liang)(liang)(liang)各坩(gan)堝(guo)(guo)質(zhi)量(liang)(liang)(liang)，系(xi)(xi)(xi)(xi)統(tong)報(bao)(bao)出揮(hui)發分測(ce)定(ding)結果。此時(shi)(shi)(shi)(shi)系(xi)(xi)(xi)(xi)統(tong)再次升(sheng)(sheng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)至850℃恒(heng)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)（系(xi)(xi)(xi)(xi)統(tong)會(hui)打(da)(da)(da)(da)(da)開(kai)(kai)(kai)(kai)(kai)氧氣(qi)(qi)閥，向高(gao)溫(wen)(wen)(wen)(wen)(wen)(wen)(wen)(wen)爐(lu)內通氧氣(qi)(qi)，氣(qi)(qi)體流量(liang)(liang)(liang)控(kong)制在4～5L/min），之后系(xi)(xi)(xi)(xi)統(tong)開(kai)(kai)(kai)(kai)(kai)始稱(cheng)量(liang)(liang)(liang)坩(gan)堝(guo)(guo)，當坩(gan)堝(guo)(guo)質(zhi)量(liang)(liang)(liang)變化不超過系(xi)(xi)(xi)(xi)統(tong)設定(ding)值(zhi)（默(mo)認(ren)0.0007克）時(shi)(shi)(shi)(shi)灰分分析結束(shu)，系(xi)(xi)(xi)(xi)統(tong)報(bao)(bao)出灰分測(ce)定(ding)結果，并打(da)(da)(da)(da)(da)印(yin)結果或報(bao)(bao)表（如果在系(xi)(xi)(xi)(xi)統(tong)設置中(zhong)設置了打(da)(da)(da)(da)(da)印(yin)）。