反应器安全状况等级为二级，检定周期定为6年。
The safe situation classification of reactor is second class. The detection peroid is 6 years.
现在，对很多没有计算机操作界面的指针式仪表的检定通常都是由人工来读数和调节，然而，人的眼睛在大量的视觉工作之后会出现视觉疲劳，造成了检定精度低，检定周期长。
But, usually, detecting of the gauge with pointer is by manual work, after long time for vision work, eyes will get tired, and this leads to low detecting precision and long detecting period.
计量器具：计量器具按规定周期检定，各种容器的自重应事先称量准确，并用油漆标明。
Measurement tools: Measurement tools shall be checked regularly according to relevant requirements. The dead weight of various vessels should be made accurate and marked with paint in advance.
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