1 Scope
This document applies to water meters used to meter the volume of cold potable water
and hot water flowing through a fully charged, closed conduit. These water meters
incorporate devices which indicate the integrated volume.
This document specifies technical characteristics and pressure loss requirements for
meters for cold potable water and hot water. It applies to water meters which can
withstand:
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a) a maximum admissible pressure (MAP) equal to at least 1 MPa1 [0,6 MPa for meters for use with pipe nominal diameters (DNs) ≥500 mm];
-
b) a maximum admissible temperature (MAT) for cold potable water meters of 30 °C;
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c) a MAT for hot water meters of up to 180 °C, depending on class.
In addition to meters based on mechanical principles, this document also applies to
water meters based on electrical or electronic principles, and to water meters based
on mechanical principles incorporating electronic devices, used to meter the volume
flow of hot water and cold potable water. It also applies to electronic ancillary
devices. As a rule ancillary devices are optional. However, national or international
regulations may make some ancillary devices mandatory in relation to the utilization
of the water meter.