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BS EN 1434-2:2022

BS EN 1434-2:2022

$189.07

Thermal energy meters – Constructional requirements

Published By Publication Date Number of Pages
BSI 2022 48
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This document is applicable to the constructional 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
9 3 Terms and definitions
4 Temperature sensors
4.1 General
4.2 Mechanical design
4.2.1 General
4.2.2 Materials of temperature probe sheath and pocket
10 4.2.3 Dimensions of direct mounted short probes – Type DS
4.2.4 Dimensions of direct mounted long probes – Type DL
11 4.2.5 Dimensions of pocket mounted long probes – Type PL
12 4.2.6 Dimensions of temperature pocket
13 4.2.7 Design of short probes with respect to installation
14 4.2.8 Design of long probes with respect to installation
4.3 Platinum temperature sensor
4.3.1 Specialized definitions for 2 wire temperature probes
15 4.3.2 Resistance characteristics
4.3.3 Signal leads
16 4.3.4 Temperature sensors for the 2-wire method
4.3.5 Temperature sensors for the 4-wire method
4.3.6 Thermal response time
4.3.7 Qualifying immersion depth of a temperature sensor
4.4 Other temperature sensors
17 5 Flow sensors
5.1 Maximum admissible working pressure, PS in bar
5.2 Sizes and dimensions
18 5.3 Test signal output
19 5.4 Adjusting device
6 Calculators
6.1 Terminals – specification and identification
6.1.1 General
6.1.2 Terminals for signal leads
21 6.1.3 Terminals for connection to the mains supply
6.2 Batteries
6.3 Dynamic behaviour
6.4 Test signal output
22 6.5 24 h interruption in supply voltage
7 Complete meter
23 8 Interfaces between sub-assemblies
8.1 General
8.2 Definitions for pulse device interfaces
8.2.1 General
8.2.2 Electrical connection
8.2.3 Classification of pulse output devices
24 8.2.4 Timing and electrical parameters for pulse output devices (other than test signals)
8.2.5 Classification of pulse input devices
25 8.2.6 Timing and electrical parameter for pulse input devices
8.2.7 Compatibility
26 9 Marking and security seals
9.1 Marking
9.1.1 General
9.1.2 Temperature sensor pairs
9.1.3 Pockets
9.1.4 Flow sensor
27 9.1.5 Calculator
9.1.6 Complete meter
28 9.2 Sites for marking
9.3 Security seals
29 Annex A (informative)Examples of temperature sensors
41 Annex B (normative)Input and output test signals
44 Annex C (informative)Low voltage power supply for the thermal energy meters and their subassemblies
C.1 Remote supply
C.1.1 Voltage (DC or AC)
C.1.2 Current available
C.1.3 Cabling requirements
C.2 Local external DC supply
C.2.1 Voltage
C.2.2 Other data
45 C.3 Power supply specifications
46 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive2014/32/EU aimed to be covered

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BS EN 1434-2:2022
$189.07