本文件规定了测定活塞式容积仪（POVA）容积的光度参考测量程序。该程序适用于完整的系统，包括最大标称体积为5000µl的基本仪器和选择用于仪器的所有零件，一次性或可重复使用，涉及交付测量（Ex）。

This document specifies the photometric reference measurement procedure for the determination of volume of piston-operated volumetric apparatus (POVA). The procedure is applicable to complete systems comprising the basic apparatus with a maximum nominal volume of 5 000 µl and all parts selected for use with the apparatus, disposable or reusable, involved in the measurement by delivery (Ex).