涉及术语、技术特性、计量特性和压力损失。适用于各种计量等级的水表，其可承受0.6 m^3/h至4000 m^3/h的永久流量、等于或大于10 bar的最大容许工作压力和30°C的最大容许温度。法律要求优先于本部分的建议。

Deals with terminology, technical characteristics, metrological characteristics and pressure loss. Applies to water meters of various metrological classes which can withstand permanent flow-rates from 0,6 m^3/h to 4000 m^3/h, maximum admissible working pressures equal to or greater than 10 bar and a maximum admissible temperature of 30 °C. Legal requirements take precedence over the recommendations of this part.