kSIST FprEN 50725:2024

SLOVENSKI STANDARD
oSIST prEN 50725:2023
01-oktober-2023
Specifikacija za prenosne električne naprave za merjenje parametrov in tlaka plina
v grelnih napravah in sistemih
Specification for portable electrical apparatus designed to measure draught and gas
pressure of heating appliances and systems
Spécification pour les appareils électriques portatifs conçus pour mesurer la pression du
tirage et des gaz dans les conduits d’évacuation des appareils et systèmes de chauffage
Ta slovenski standard je istoveten z: prEN 50725
ICS:
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
oSIST prEN 50725:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 50725:2023
oSIST prEN 50725:2023
EUROPEAN STANDARD DRAFT
prEN 50725
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2023
ICS  -
English Version
Specification for portable electrical apparatus designed to
measure draught and gas pressure of heating appliances and
systems
Spécification pour les appareils électriques portatifs conçus To be completed
pour mesurer la pression du tirage et des gaz dans les
conduits d'évacuation des appareils et systèmes de
chauffage
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2023-10-27.

It has been drawn up by CLC/TC 216.

If this draft becomes a European Standard, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 73769 Ref. No. prEN 50725 E

oSIST prEN 50725:2023
prEN 50725:2023 (E)
1 Contents Page
2 European foreword . 3
3 Introduction . 4
4 1 Scope . 5
5 2 Normative references . 5
6 3 Terms and definitions . 5
7 4 General requirements . 7
8 4.1 General . 7
9 4.2 Construction . 7
10 4.3 Labelling and Instructions . 9
11 5 Test methods .10
12 5.1 General requirements for tests .10
13 5.2 Normal conditions for tests .11
14 5.3 Mechanical tests .11
15 5.4 Electrical and software tests .12
16 5.5 Tests with pressure supply .12
17 Annex A (informative) National situations for strength test, tightness test and fitness test of gas
18 pipework with reference to EN1775 and EU 425/2016 .14
19 A.1 Strength test according EN 1775 and national implementation for maximum operating
20 pressure up to 100 hPa .14
21 A.2 Tightness test according EN 1775 and national implementation for maximum operating
22 pressure up to 100 hPa .15
23 A.3 Fitness test according EN 1775 and national implementation for maximum operating
24 pressure up to 100 hPa .15
25 A.4 Tightness test according EN 1775 and national implementation for maximum operating
26 pressure up to 100 hPa .16
27 Annex B (informative) National situations for strength test, tightness test and fitness test of gas
28 pipework with reference to IGEM/UP/1B .17
29 Annex C (normative) Standard methods for determining measuring uncertainty .18
30 C.1 Determination of the analytic function .18
31 C.2 Determination of reproducibility .18
32 Bibliography .19
oSIST prEN 50725:2023
prEN 50725:2023 (E)
34 European foreword
35 This document [prEN 50725:2023] has been prepared by CLC/TC/216 “Gas Detectors”.
36 This document is currently submitted to the Enquiry.
37 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
oSIST prEN 50725:2023
prEN 50725:2023 (E)
38 Introduction
39 This document covers apparatus for measuring draught and gas pressure of heating appliances and systems.
40 It forms a specification of portable electrical apparatus designed to measure draught and gas pressure of heating
41 appliances and systems.
oSIST prEN 50725:2023
prEN 50725:2023 (E)
42 1 Scope
43 This document specifies the requirements and test methods concerning, in particular the construction, safety,
44 and fitness for purpose, as well as the capability and marking of a hand-held battery powered pressure and
45 leakage measurement instrument, hereafter referred to as “pressure meters”, for gas pipework in buildings, gas
46 pipes of appliances and draught in chimneys.
47 NOTE Areas of application can be supply pressure of gas appliances, nozzle pressure of gas appliances (see relevant
48 instruction manuals of gas appliances) as well as strength test, tightness test and fitness test of gas pipework as defined in
49 EN 1775 and relevant national standards for gas pipework in buildings, and draught measurement in chimneys of heating
50 appliances.
51 This document covers pressure meters with the capability of
52 • use with air, natural gas, liquid petroleum gas (LPG), hydrogen and mixtures of natural gas and hydrogen,
53 • measuring pressure in units of bar, mbar, Pa, hPa, kPa, MPa, H 0, mm H2O or PSI,
54 • measuring leakage rate in l/h,
55 • withstanding the every-day working environment encountered by installation and service engineers in
56 domestic, commercial, or industrial premises.
57 Such pressure meters might be capable of
58 • being switchable between units by the user,
59 • storing and/or transmitting said measurements to a remote user.
60 2 Normative references
61 The following documents are referred to in the text in such a way that some or all of their content constitutes
62 requirements of this document. For dated references, only the edition cited applies. For undated references, the
63 latest edition of the referenced document (including any amendments) applies.
64 EN 50270:2015, Electromagnetic compatibility – Electrical apparatus for the detection and measurement of
65 combustible gases, toxic gases or oxygen
66 EN 50271:2018, Electrical apparatus for the detection and measurement of combustible gases, toxic gases or
67 oxygen – Requirements and tests for apparatus using software and/or digital technologies
68 EN 60068-2-6, Environmental testing – Part 2-6: Tests – Test Fc: Vibration (sinusoidal) (IEC 60068-2-6)
69 prEN IEC 60335-1:2022, Household and similar electrical appliances – Safety- Part 1: General requirements
70 (IEC 60335-1:2020)
71 ISO/IEC Guide 98-3:2008, Uncertainty of measurement – Guide to the expression of uncertainty in
72 measurement (GUM. 1995)
73 3 Terms and definitions
74 For the purposes of this document, the following terms and definitions apply.
75 ISO and IEC maintain terminological databases for use in standardization at the following addresses:
76 • ISO Online browsing platform: available at https://www.iso.org/obp

As impacted by EN 50270:2015/AC:2016-08.
Under preparation.
oSIST prEN 50725:2023
prEN 50725:2023 (E)
77 • IEC Electropedia: available at https://www.electropedia.org/
78 3.1
79 domestic residential and commercial premises
80 any place of residence of a household, family or person (whether temporary or permanent) and commercial
81 premises whether residential or not and including recreational boats, caravans and mobile homes
82 3.2
83 sensors
84 assembly in which the sensing element is housed and which may contain associated circuit components
85 3.3
86 sensing element
87 device, the output of which will change with variation of the parameter of interest
88 3.4
89 spot reading
90 apparatus intended to be used for short periods of time in the range of minutes, as required
91 3.5
92 mains powered apparatus
93 apparatus designed to be powered by the domestic mains electrical supply with or without an additional power
94 source
95 3.6
96 battery powered apparatus
97 apparatus designed to be energised from batteries alone, whether disposable or rechargeable
98 3.7
99 sampling point connector
100 part of the apparatus that is used to connect the apparatus to the appliance for the purpose of sampling the
101 pressure
102 3.8
103 initial start up delay
104 time taken for the apparatus to reach the operating mode from switch-on, or after replacing batteries, or following
105 power failure in the case of mains powered equipment
106 3.9
107 calibration
108 process of determining the deviation of an apparatus relative to a reference
109 3.10
110 reference
111 in laboratory tests, a measuring device with certification proving traceability to a national or international
112 metrology institute
113 3.11
114 adjustment
115 process of tuning the apparatus, in order to return the deviation found in calibration to within the admissible
116 error
117 3.12
118 functional module
119 all components required for one measurement task, including both hardware and software
120 Note 1 to entry: A functional module may consist of one or more separate pieces of equipment or may be completely
121 integrated with the apparatus.
oSIST prEN 50725:2023
prEN 50725:2023 (E)
122 3.13
123 response time (t90)
124 time interval with the apparatus in a warmed-up condition, between the time when an Instantaneous variation
125 of the parameter to be measured is produced at the apparatus inlet, and the time when the response reaches
126 and remains beyond 90 % of the final indication
127 3.14
128 gas leakage rate
129 volume flow (unit l/h) of burnable gas that escapes from the line system during a specified duration due to
130 leakage
131 3.15
132 standard volume flow
133 volume flow (unit l/h) with reference to the physical standard temperature and pressure at a temperature of
134 273,15 K and a pressure of 1 013,25 hPa
135 3.16
136 operating volume flow
137 volume flow (unit l/h) with reference to the operating conditions (pressure, temperature) prevailing at the place
138 of measurement
139 3.17
140 operating pressure
141 actual operating pressure as standing pressure found at the time of measurement
142 3.18
143 reference operating pressure
144 reference pressure for determining the leakage quant
...