scope:

This part of ISO 8655 provides user guidance regarding the selection of POVA (including exchangeable parts) and best practices for its use. This document also specifies requirements for user training and competence and introduces performance tolerances and testing of piston-operated volumetric apparatus (POVA) to ensure fitness for its intended use. NOTE - General requirements and definitions of terms for piston-operated volumetric apparatus are given in ISO 8655-1. For the metrological requirements, maximum permissible errors, requirements for marking and information to be provided for users for piston-operated volumetric apparatus, see ISO 8655-2 for pipettes, see ISO 8655-3 for burettes, see ISO 8655-4 for dilutors, see ISO 8655-5 for dispensers, and see ISO 8655-9 for manually operated precision laboratory syringes. The gravimetric reference measurement procedure for the determination of volume is given in ISO 8655-6. The photometric reference measurement procedure for the determination of volume is given in ISO 8655-8. Alternative measurement procedures for the determination of volume are described in ISO 8655-7.