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BS EN 1434-1:2022

BS EN 1434-1:2022

$189.07

Thermal energy meters – General requirements

Published By Publication Date Number of Pages
BSI 2022 46
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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
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
14 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
15 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
16 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
17 5.10.3 Rated operated conditions
5.10.4 Indication
18 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
19 6.2 Requirements outside the limiting values of the flow rate
6.3 Display
20 6.4 Protection against fraud
6.5 Supply voltage
6.6 Effect on temperature sensor pairs by mounting in pockets
6.7 Reproducibility
21 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
22 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
23 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
24 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
25 11 Thermal energy meter specification
11.1 General
11.2 Flow sensor
26 11.3 Temperature sensor pair
27 11.4 Calculator
28 11.5 Complete meters
30 12 Information to be made available by the manufacturer or supplier
12.1 Installation instructions
31 12.2 Parameter setting instructions
32 12.3 Adjustment instructions
12.4 Maintenance instructions
33 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
34 Annex A (normative)Heat coefficient formulae
A.1 Water
36 A.2 Heat-conveying liquids other than water
37 Annex B (normative)Flow conditioner package
39 Annex C (normative)Fast response meters
40 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
$189.07