scope:

This European Standard specifies commissioning, operationalmonitoring and maintenance and applies to heat meters. Heat metersare instruments intended for measuring the energy which in aheat-exchange circuit is absorbed (cooling) or given up (heating)by a liquid called the heat-conveying liquid. The heat meterindicates the quantity of heat in legal units. Electrical safetyrequirements are not covered by this European Standard. Pressuresafety requirements are not covered by this European Standard.Surface mounted temperature sensors are not covered by thisEuropean Standard. This standard covers meters for closed systemsonly, where the differential pressure over the thermal load islimited.