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HR150型洛氏硬度计是计量检定中常见的硬度试验仪器，在检定过程中较常见的故障及误差来源一般有以下几种：l．主负荷不能全部加上，致使检定工作无法进行。该故障产生的主要原因是由于吊杆的比度调整不当。解决方法是：松开吊杆与连接杠之间的螺母，缩短吊杆比度至适当位置，?
HR150 Rockwell Hardness Tester is a kind of hardness test instrument commonly used in metrological verification. The common faults and error sources in the verification process are generally as follows: l. The main load can not be all plus, resulting in verification work can not be carried out. The main reason for the failure is due to improper adjustment of the boom ratio. The solution is: Loosen the nut between the boom and connecting bar to shorten the boom ratio to the appropriate position ,?