本文件描述了用于定义电气量、角度定位、光学辐射探测器、气流和温度的仪器能力的术语。此外，读者还了解了在光度实验室中选择、维护和使用测量仪器时需要遵守的注意事项，同时保持适当的不确定度水平。

This document describes terms used to define instrument capabilities for electrical quantities, angular positioning, optical radiation detectors, airflow, and temperature. In addition, the reader is informed about cautions that needs to be observed when selecting, maintaining, and using measuring instruments in the photometric laboratory while maintaining appropriate levels of uncertainty.