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怎樣才能提高煤炭發熱量測定儀的准確度

发布时间：2012-11-14 点击次数：1503次

随着市场经济发展程度的不断提高，作为煤炭贸易结算主要依据的热值检测结果的准确性便成了供需双方关注的主要焦点。现有各类量热仪而言，假设仪器合格，操作正确。则只要在正式测试的前注意好以下事项就能获得准确性较高的测试结果：

1、保持環境溫度穩定不變，並等待做夠長時間，使外筒溫度與環境溫度充分一致。

2、檢查儀器熱容量所對應的溫度與當前溫度是否一致，若不一致則重新標定量熱儀的熱容量。

3、对外筒温度受试验次数影响的仪器，应在测试发热量时随机做标准物质试验或热容量，若发现实验结果与标准物质热值不符或偏差大，或者热容量也亦变化大，则应立即重新标定热容量。

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