自動定硫儀的全部(bu)測定(ding)過程(cheng)采(cai)用微處理(li)器智能控制，使得測定(ding)數據穩定(ding)，平行樣好，且大(da)屏幕漢字(zi)顯示，人(ren)機界面友好,鍵盤操作簡單易學好用，自動化(hua)智能控制程(cheng)度較高，體積小巧等(deng)諸(zhu)多優點。

定硫儀燃燒爐部分的故障排除：

（1）熱(re)電(dian)(dian)(dian)偶(ou)的(de)(de)(de)正確安裝很重要，向下插碰(peng)到(dao)硅(gui)碳管后回2mm，離的(de)(de)(de)越遠，則(ze)(ze)儀器(qi)(qi)顯(xian)(xian)示(shi)(shi)值越低于實(shi)(shi)際爐(lu)溫(wen)(wen)(wen)(wen)(wen)值，造成(cheng)顯(xian)(xian)示(shi)(shi)爐(lu)溫(wen)(wen)(wen)(wen)(wen)遲遲升(sheng)不到(dao)設(she)定(ding)溫(wen)(wen)(wen)(wen)(wen)度(du)（實(shi)(shi)際爐(lu)溫(wen)(wen)(wen)(wen)(wen)早(zao)已達到(dao)）或(huo)者(zhe)升(sheng)到(dao)設(she)定(ding)溫(wen)(wen)(wen)(wen)(wen)度(du)后，控(kong)(kong)制精(jing)度(du)不好(hao)，在控(kong)(kong)溫(wen)(wen)(wen)(wen)(wen)點上(shang)(shang)下幾十甚至上(shang)(shang)百(bai)的(de)(de)(de)波動。如(ru)(ru)(ru)果(guo)熱(re)電(dian)(dian)(dian)偶(ou)碰(peng)在硅(gui)碳管上(shang)(shang)，則(ze)(ze)當升(sheng)到(dao)高(gao)溫(wen)(wen)(wen)(wen)(wen)時(shi)，會(hui)有(you)(you)漏電(dian)(dian)(dian)流(liu)竄入(ru)熱(re)電(dian)(dian)(dian)偶(ou)上(shang)(shang)，則(ze)(ze)當升(sheng)至高(gao)溫(wen)(wen)(wen)(wen)(wen)時(shi)，會(hui)有(you)(you)漏電(dian)(dian)(dian)流(liu)由硅(gui)碳管竄入(ru)機內，使顯(xian)(xian)示(shi)(shi)溫(wen)(wen)(wen)(wen)(wen)度(du)大幅(fu)度(du)波動，直線下掉甚至出(chu)現負(fu)溫(wen)(wen)(wen)(wen)(wen)度(du)（要與(yu)熱(re)電(dian)(dian)(dian)偶(ou)接(jie)反造成(cheng)的(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)度(du)下降出(chu)現負(fu)溫(wen)(wen)(wen)(wen)(wen)度(du)區(qu)分(fen)開），嚴重的(de)(de)(de)擊壞儀器(qi)(qi)的(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)度(du)部分(fen)電(dian)(dian)(dian)路。控(kong)(kong)溫(wen)(wen)(wen)(wen)(wen)異常，爐(lu)溫(wen)(wen)(wen)(wen)(wen)過(guo)高(gao)（高(gao)于1150℃）的(de)(de)(de)現象(xiang)是：向爐(lu)膛內看，已不是正常的(de)(de)(de)紅光，而(er)是已經發(fa)白，往(wang)往(wang)造成(cheng)石(shi)英舟(zhou)與(yu)異徑(jing)管粘連(lian)，致使送(song)樣(yang)棒(bang)返回時(shi)鉤不動石(shi)英舟(zhou)而(er)發(fa)生斷(duan)鉤現象(xiang)，嚴重的(de)(de)(de)有(you)(you)異徑(jing)管燒彎，異徑(jing)管與(yu)硅(gui)碳管粘連(lian)現象(xiang)。如(ru)(ru)(ru)果(guo)送(song)入(ru)煤樣(yang)，退出(chu)時(shi)會(hui)發(fa)現煤灰已熔化(hua)在瓷舟(zhou)上(shang)(shang)，無法刮掉，可視實(shi)(shi)際情況調(diao)整熱(re)電(dian)(dian)(dian)偶(ou)位置(zhi)或(huo)調(diao)整設(she)定(ding)溫(wen)(wen)(wen)(wen)(wen)度(du)如(ru)(ru)(ru)果(guo)熱(re)電(dian)(dian)(dian)偶(ou)未接(jie)好(hao)或(huo)其內部斷(duan)路，則(ze)(ze)儀器(qi)(qi)顯(xian)(xian)示(shi)(shi)1，表示(shi)(shi)超量程，如(ru)(ru)(ru)果(guo)熱(re)電(dian)(dian)(dian)偶(ou)短路（熱(re)電(dian)(dian)(dian)偶(ou)失(shi)去(qu)感生電(dian)(dian)(dian)壓能力形同一根短路線或(huo)者(zhe)外(wai)接(jie)線搭接(jie)），則(ze)(ze)儀器(qi)(qi)始終(zhong)(zhong)顯(xian)(xian)示(shi)(shi)室溫(wen)(wen)(wen)(wen)(wen)（本機即一百(bai)多度(du)），加滿爐(lu)流(liu)，顯(xian)(xian)示(shi)(shi)溫(wen)(wen)(wen)(wen)(wen)度(du)也始終(zhong)(zhong)不上(shang)(shang)升(sheng)（但實(shi)(shi)際溫(wen)(wen)(wen)(wen)(wen)度(du)在上(shang)(shang)升(sheng)）。

（2）異徑(jing)管是試樣的密閉燃(ran)燒室，保(bao)證燃(ran)燒產生的S02

氣體(ti)(ti)在氣泵作用下(xia)(xia)全部進入電(dian)解池(chi)。如其有(you)裂紋，將(jiang)會(hui)造成含硫氣體(ti)(ti)外逸(yi)，使測定結果嚴(yan)重偏低(di)且不(bu)穩(wen)定。異徑管處于高溫下(xia)(xia)，又隱蔽于爐(lu)體(ti)(ti)內，故斷裂處較隱蔽，感覺(jue)異常時可(ke)松開爐(lu)口的(de)緊固鏍絲，將(jiang)其抽出檢查。

（3）硅(gui)碳管調試(shi)時(shi)是以10Ω為負(fu)載(zai)值的(de)，故選(xuan)購(gou)時(shi)為10Ω,過大(da)或過小，都(dou)將(jiang)造成加熱電(dian)流(liu)變(bian)小，其自然老化后，阻(zu)值將(jiang)會變(bian)大(da)。表現為升(sheng)溫時(shi)間變(bian)長可(ke)升(sheng)不到設(she)定(ding)(ding)溫度(du)。處理辦法一(yi)般(ban)以更(geng)換為好，判定(ding)(ding)時(shi)可(ke)量其阻(zu)值情況。