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BS EN 1434-1:2022 – TC:2023 Edition

BS EN 1434-1:2022 – TC:2023 Edition

$246.62

Tracked Changes. Thermal energy meters – General requirements

Published By Publication Date Number of Pages
BSI 2023 98
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This document is applicable for the general requirements for thermal energy meters. Thermal energy meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The thermal energy meter indicates the quantity of thermal energy in legal units. This document covers meters for closed systems only, where the differential pressure over the thermal load is limited. This document is not applicable to: – electrical safety requirements; – pressure safety requirements; and – surface mounted temperature sensors.

PDF Catalog

PDF Pages PDF Title
54 undefined
60 1 Scope
2 Normative references
3 Terms and definitions
66 4 Types of instruments
4.1 General
4.2 Complete instrument
4.3 Combined instrument
4.4 Hybrid instrument
4.5 Sub-assemblies of a thermal energy meter, which is a combined instrument
4.5.1 General
4.5.2 Flow sensor
4.5.3 Temperature sensor pair
4.5.4 Calculator
67 4.6 Equipment under test (EUT)
5 Rated operating conditions
5.1 Limits of temperature range
5.2 Limits of temperature differences
5.3 Limits of flow rate
5.4 Limit of thermal power
68 5.5 Limits of working pressure (PS and Pmin)
5.6 Nominal pressure (PN)
5.7 Limits in ambient temperature
5.8 Limits in deviations in supply voltage
5.9 Maximum pressure loss
5.10 Specific requirements on registration devices
5.10.1 General
5.10.2 Suitability
69 5.10.3 Rated operated conditions
5.10.4 Indication
70 5.10.5 MPE for additional functionalities (smart metering functionality)
5.10.5.1 Clock
5.10.5.2 Required accuracy when the measured temperature is used for additional energy accumulations
6 Technical characteristics
6.1 Materials and construction
71 6.2 Requirements outside the limiting values of the flow rate
6.3 Display
72 6.4 Protection against fraud
6.5 Supply voltage
6.6 Effect on temperature sensor pairs by mounting in pockets
6.7 Reproducibility
73 6.8 Repeatability
6.9 Software
7 Specified working range
7.1 General
7.2 Temperature difference
7.3 Flow rate
8 Heat transmission formula
74 9 Metrological characteristics (Maximum Permissible Error, MPE)
9.1 General
9.2 Values of maximum permissible errors
9.2.1 Maximum permissible relative errors of complete thermal energy meters
75 9.2.2 Maximum permissible relative error of sub-assemblies
9.2.2.1 Calculator
9.2.2.2 Temperature sensor pair
9.2.2.3 Flow sensor
9.3 Application of maximum permissible errors
76 10 Environmental classification
10.1 General
10.2 Environmental class A (Domestic use, indoor installations)
10.3 Environmental class B (Domestic use, outdoor installations)
10.4 Environmental class C (Industrial installations)
10.5 Mechanical classes M1 to M3
77 11 Thermal energy meter specification
11.1 General
11.2 Flow sensor
78 11.3 Temperature sensor pair
79 11.4 Calculator
80 11.5 Complete meters
82 12 Information to be made available by the manufacturer or supplier
12.1 Installation instructions
83 12.2 Parameter setting instructions
84 12.3 Adjustment instructions
12.4 Maintenance instructions
85 12.5 Information required when a thermal energy meter is taken out of service for recycling and/or disposal
12.5.1 General
12.5.2 Disassembly
12.5.3 Recycling
12.5.4 Disposal
86 Annex A (normative)Heat coefficient formulae
A.1 Water
88 A.2 Heat-conveying liquids other than water
89 Annex B (normative)Flow conditioner package
91 Annex C (normative)Fast response meters
92 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/32/EU aimed to be covered

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BS EN 1434-1:2022 - TC
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