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BS EN 1434-1:2015+A1:2018

BS EN 1434-1:2015+A1:2018

$167.15

Thermal energy meters – General requirements

Published By Publication Date Number of Pages
BSI 2018 42
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This European Standard specifies 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 heat in legal units.

Electrical safety requirements are not covered by this European Standard.

Pressure safety requirements are not covered by this European Standard.

Surface mounted temperature sensors are not covered by this European Standard.

This standard covers meters for closed systems only, where the differential pressure over the thermal load is limited.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
13 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
14 4.5.2 Flow sensor
4.5.3 Temperature sensor pair
4.5.4 Calculator
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
15 5.4 Limit of thermal power
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
16 5.10.3 Rated operated conditions
5.10.4 Indication
17 5.10.5 MPE
5.10.5.1 Clock
5.10.5.2 MPE of tolerance quantities used for threshold activation of additional energy accumulations
6 Technical characteristics
6.1 Materials and construction
18 6.2 Requirements outside the limiting values of the flow rate
6.3 Display
19 6.4 Protection against fraud
6.5 Supply voltage
6.6 Qualifying immersion depth of a temperature sensor
6.7 The influence on a temperature sensor pair caused by mounting in pockets
6.8 Reproducibility
20 6.9 Repeatability
6.10 Software
7 Specified working range
7.1 General
7.2 Temperature difference
7.3 Flow rate
8 Heat transmission formula
21 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”
22 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
23 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
24 11 !Thermal energy meter” specification
11.1 General
11.2 Flow sensor
25 11.3 Temperature sensor pair
26 11.4 Calculator
27 11.5 Complete meters
29 12 Information to be made available by the manufacturer or supplier
12.1 Installation instructions
30 12.2 Parameter setting instructions
12.3 Adjustment instructions
31 12.4 Maintenance instructions
12.5 Hints for disposal instructions
32 Annex A (normative)Heat coefficient equations
34 Annex B (normative)Flow conditioner package
36 Annex C (normative)Fast response meters
37 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 1434-1:2015+A1:2018
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