原文由 poorlittle(poorlittle) 发表:
似乎是用4个标准样品去检定。 (是否类似用标准沙去检查筛子那样?)
(From http://www.wikinvest.com/stock/Alliance_Resource_Partners,_L.P._%28ARLP%29/Hardgrove_Grindability_Index_Coal :
……Each grindability machine is calibrated by using four grindability standards to develop a grindability index curve……)
Hardgrove grindability | ||
Apparatus | 12 | Calibrate against four national reference coal samples with certified grindability indices. Refer to AS 1038.20. |
Mill revolutions | 12 | Check number of revolutions per minute. |
原文由 poorlittle(poorlittle) 发表:
NATA[1]的一个文件指出, 每12个月要对Hardgrove-Machine进行两项检验: (1) 用4个国家级标准品检定; (2) 检验转速。
Hardgrove grindabilityApparatus 12 Calibrate against four national reference coal samples with certified grindability indices. Refer to AS 1038.20. Mill revolutions 12 Check number of revolutions per minute.
[1] NATA (National Association of Testing Authorities) 是澳洲国家级的计量机构, 相当于中国的NIM (National Institution of Metrology 中国计量科学研究院)
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原文由 haoennnn(haoennnn) 发表:
4个标准样品是用来绘制校准图的,校准图是一条直线。设备使用前必须要先绘制出该校准图,不知设备检定这样可不可以?