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熱量計點火失敗主要原因

发布时间：2010-05-15 点击次数：1756次

煤质分析仪器煤質化驗儀器煤质检测仪器煤质仪器-鹤壁华通

煤炭检测设备--- 熱量計點火失敗主要原因是点火线路不通、接触不良或短路。
當試驗出現點火失敗現象時，應檢查氧彈，首先檢查點火線短是否導通。先用萬用表測量氧彈上的兩個點火電極間是否導通【對于獨頭氧彈，測量獨頭的中心與彈體是否導通】，若線路仍然不通，多半是由兩個電極柱氧化生鏽【有時爲“白鏽”，肉眼不易發現】造成導電不良，此時，應用砂紙將兩個電極柱，特別是與點火絲連接的部位打磨光亮，使接觸良好。如果兩電極柱打磨幹淨明亮後仍不導通，則應檢查量熱儀上的兩個電極引線間是否導通。若不導通，可能是引出線中有虛焊或斷線的情況。當然也有可能是操作人員在裏連接點火線時未能保證與電極接觸良好。此時只需要換一根新點火絲【若舊的已通過電的話】，重新連接即可。爲了判斷是儀器內部電路還是氧彈的問題，可以用點火絲單獨測試儀器，將點火絲連接點火頭和儀器外殼（上蓋的橢圓形不鏽鋼板上），利用點火功能測試，如果點火正常，則是氧彈的問題。不點火就需要廠家維修。如果通過檢查證實氧彈和儀器的點火線路都是導通的【氧彈與儀器連接並開通點火線路時點火絲發紅】，說明點火失敗是由于短路照成的。此時應該檢查兩電極柱，主要檢查帶坩埚架的電極柱是否與氧彈接觸，氧彈內的絕緣套柱是否破損以及內筒水是否潔淨或混入了電解質等。這些因素都有可能産生短路而導致點火失敗。
按上述方式仔細檢查後仍不能找出原因和排除故障時，就需要找生産廠家進行檢查和排除故障。

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