Non-domestic gas-fired overhead luminous radiant heaters - Part 2: Rational use of energy

This European Standard specifies the requirements and test methods for the rational use of energy of non-domestic gas-fired overhead luminous radiant heaters for environmental comfort, incorporating an atmospheric burner system referred to in the body of the text as “appliances”.
This European Standard is applicable to Type A1 appliances only (see 4.3).
This European Standard is not applicable to:
a)   appliances designed for use in domestic dwellings;
b)   outdoor appliances;
c)   appliances of heat input in excess of 120 kW (based on the net calorific value of the appropriate reference gas);
d)   appliances having fully pre-mixed gas and air burners in which:
1)   either the gas and all the combustion air are brought together just before the level of the combustion zone; or
2)   pre-mixing of the gas and all combustion air is carried out in a part of the burner upstream of the combustion zone.
e)   appliances in which the supply of combustion air and/or the removal of the products of combustion is achieved by integral mechanical means.
This standard is applicable to appliances which are intended to be type tested. Requirements for appliances which are not intended to be type tested would need to be subject to further consideration.

Gasgeräte-Heizstrahler - Hellstrahler mit Brenner ohne Gebläse für gewerbliche und industrielle Anwendung - Teil 2: Rationelle Energienutzung

Diese Europäische Norm enthält die Anforderungen und Prüfmethoden für die rationelle Energienutzung von Hellstrahlern mit einem atmosphärischen Brenner ohne Gebläse (im folgenden Text als "Geräte" bezeichnet).
Diese Europäische Norm gilt nur für Geräte der Art A1 (siehe 4.3).
Diese Europäische Norm gilt nicht für:
a)   Geräte, die für eine Verwendung in Wohnungen gedacht sind;
b)   Geräte, die für eine Verwendung im Freien gedacht sind;
c)   Geräte mit einer Wärmebelastung über 120 kW (bezogen auf den Heizwert des jeweiligen Normprüf-
gases);
d)   Geräte mit Brennern mit kompletter Gas- und Luftvormischung, bei denen
1)   entweder das Gas und die gesamte Verbrennungsluft kurz vor der Verbrennungszone zusammengeführt werden; oder
2)   das Vormischen des Gases mit der gesamten Verbrennungsluft in einem Teil des Brenners vor der Verbrennungszone erfolgt,
e)   Geräte, bei denen die Zufuhr von Verbrennungsluft und/oder die Abführung der Abgase mit inneren mechanischen Mitteln erfolgt.
Diese Norm ist anwendbar für Geräte, die für eine Typprüfung vorgesehen sind. Anforderungen an Geräte, die nicht für eine Typprüfung vorgesehen sind, benötigen weitere Überlegungen.

Appareils surélevés de chauffage a rayonnement lumineux au gaz, a usage non domestique - Partie 2 : Utilisation rationnelle de l'énergie

La présente Norme européenne définit les exigences et les méthodes d’essai relatives a l’utilisation rationnelle d’énergie des appareils surélevés de chauffage a rayonnement lumineux, a usage non domestique utilisant les combustibles gazeux pour le confort de l’environnement, comprenant un systeme de bruleur atmosphérique appelé ci-apres « appareils ».
La présente Norme européenne s’applique aux appareils des types A1 uniquement (voir 4.3).
La présente Norme européenne ne s’applique pas :
aux appareils conçus pour des locaux domestiques ;
aux appareils utilisés en plein air ;
aux appareils dont le débit calorifique dépasse 120 kW (sur le pouvoir calorifique inférieur du gaz de référence approprié) ;
aux appareils avec bruleur a prémélange total air et gaz dans lesquels :
soit le gaz et tout l’air comburant sont mélangés juste avant la zone de combustion ;
soit le prémélange du gaz et de tout l’air comburant est transporté dans une partie du bruleur en amont de la zone de combustion ;
aux appareils pour lesquels l’alimentation en air comburant et/ou l’évacuation des produits de combustion est effectuée par des moyens mécaniques intégrés.
Cette Norme européenne est applicable aux appareils qui sont destinés a subir des essais de type. Les exigences pour les appareils qui ne sont pas destinés a subir des essais de type nécessiteraient une attention particuliere.

Stropna plinska sevala z zgorevanjem na površini za nestanovanjske prostore – 2. del: Smotrna raba energije

General Information

Status
Withdrawn
Publication Date
31-Aug-2006
Withdrawal Date
04-Dec-2019
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
04-Dec-2019
Due Date
27-Dec-2019
Completion Date
05-Dec-2019

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Non-domestic gas-fired overhead luminous radiant heaters - Part 2: Rational use of energyStropna plinska sevala z zgorevanjem na površini za nestanovanjske prostore – 2. del: Smotrna raba energijeAppareils surélevés de chauffage a rayonnement lumineux au gaz, a usage non domestique - Partie 2 : Utilisation rationnelle de l'énergieGasgeräte-Heizstrahler - Hellstrahler mit Brenner ohne Gebläse für gewerbliche und industrielle Anwendung - Teil 2: Rationelle EnergienutzungTa slovenski standard je istoveten z:EN 419-2:2006SIST EN 419-2:2006en,fr,de97.100.20ICS:SIST ENV 1259-3:1996SIST ENV 1259-2:1996SIST ENV 1259-1:19961DGRPHãþDSLOVENSKI

STANDARDSIST EN 419-2:200601-september-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 419-2June 2006ICS 97.100.20Supersedes ENV 1259-1:1994, ENV 1259-2:1996, ENV1259-3:1996

English VersionNon-domestic gas-fired overhead luminous radiant heaters -Part 2: Rational use of energyAppareils surélevés de chauffage à rayonnement lumineuxau gaz, à usage non domestique - Partie 2 : Utilisationrationnelle de l'énergieGasgeräte-Heizstrahler Hellstrahler mit Brenner ohneGebläse für gewerbliche und industrielle Anwendung - Teil2: Rationelle EnergienutzungThis European Standard was approved by CEN on 16 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36

B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 419-2:2006: E

EN 419-2:2006 (E) 2 Contents Page Foreword.............................................................................................................................................................4 1 Scope......................................................................................................................................................5 2 Normative references...........................................................................................................................5 3 Terms and definitions...........................................................................................................................5 4 Classification of appliances.................................................................................................................7 4.1 Classification according to the nature of the gases used................................................................7 4.2 Classification according to the gases capable of being used.........................................................7 4.3 Classification according to the mode of evacuation of the combustion products........................7 5 Symbols.................................................................................................................................................7 6 Requirements for the rational use of energy.....................................................................................8 7 Test methods.........................................................................................................................................9 7.1 General...................................................................................................................................................9 7.2 Radiant factor........................................................................................................................................9 7.2.1 General...................................................................................................................................................9 7.2.2 Method A................................................................................................................................................9 7.2.3 Method B..............................................................................................................................................19 Annex A (informative)

Recording test data (Test Method A)......................................................................22 A.1 General information to be recorded..................................................................................................22 A.2 Measurement results..........................................................................................................................22 Annex B (informative)

Blank forms (Test method A)..................................................................................23 B.1 Model test result form – Quarter sphere burner end and opposite end........................................23 B.2 Model test result form – Quarter cylinders for appliances greater than 1,3 m long – Front side and back side....................................................................................................................24 B.3 Half sphere for appliances less than or equal to 1,3m long...........................................................25 Annex C (informative)

Worked example (Test method A)..........................................................................26 C.1 Radiant factor – Recorder data and calculation..............................................................................26 C.2 Radiant output – Recorded data and calculation............................................................................27 Annex D (normative)

Procedure for measuring the window correction factor (Fw) (Test method A)............................................................................................................................................28 Annex E (normative)

Correction of measured radiant output for absorption by air (Test methods A and B)...............................................................................................................................29 E.1 General.................................................................................................................................................29 E.2 Mean beam length (D).........................................................................................................................29 E.3 Absorption of radiation by water vapour..........................................................................................29 E.4 Absorption of radiation by carbon dioxide......................................................................................30 E.5 Total radiation absorption..................................................................................................................31 E.6 Calculation method.............................................................................................................................31 Annex F (informative)

Radiant heat output data - Recording of results (Test method B).......................32 F.1 General information to be recorded..................................................................................................32 F.1.1 Test and appliance data.....................................................................................................................32 F.1.2 Radiometer technical data.................................................................................................................32 F.1.3 Measuring plane technical data.........................................................................................................32 F.2 Measurement results..........................................................................................................................33 F.2.1 Test information..................................................................................................................................33 F.2.2 Test ambient conditions.....................................................................................................................33

EN 419-2:2006 (E)

3F.2.3 Gas/heat input data.............................................................................................................................33 F.2.4 Flue gas data.......................................................................................................................................33 F.2.5 Absorption of water vapour and CO2 data.......................................................................................34 F.2.6 Irradiation measurement data............................................................................................................34 Annex G (informative)

Worked example (Test method B)..........................................................................35 G.1 General information............................................................................................................................35 G.2 Radiometer technical data.................................................................................................................35 G.3 Measuring plane technical data.........................................................................................................35 G.4 Measurement results..........................................................................................................................36 G.4.1 Test information..................................................................................................................................36 G.4.2 Test ambient conditions.....................................................................................................................36 G.4.3 Gas/heat input data.............................................................................................................................36 G.4.4 Flue gas data.......................................................................................................................................36 G.4.5 Absorption of water vapour and CO2 data.......................................................................................37 G.4.6 Irradiation measurement data............................................................................................................37 Annex H (informative)

Radiometer design (Test method B).......................................................................39 H.1 Principle radiometer design features................................................................................................39 H.2 Radiometer technical design.............................................................................................................40 H.3 Pyro-electric detector.........................................................................................................................40 Annex I (normative)

Radiometer calibration (Test method B)....................................................................41 I.1 Radiometer calibration.......................................................................................................................41 I.1.1 General.................................................................................................................................................41 I.1.2 Black Body calibration method.........................................................................................................41 I.2 Worked example..................................................................................................................................42 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements or other provisions of EU Directives.......................................................................44

EN 419-2:2006 (E)

4Foreword This European Standard (EN 419-2:2006) has been prepared by Technical Committee CEN/TC 180 “Non-domestic gas-fired overhead radiant heaters”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. This European Standard supersedes ENV 1259-1:1994, ENV 1259-2:1996 and ENV 1259-3:1996 This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. This part of EN 419 complements EN 419-1: “Non-domestic gas-fired overhead luminous radiant heaters - Part 1: Safety”. It is intended that this standard would be reviewed 3 years after publication. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EN 419-2:2006 (E)

51 Scope This European Standard specifies the requirements and test methods for the rational use of energy of non-domestic gas-fired overhead luminous radiant heaters for environmental comfort, incorporating an atmospheric burner system referred to in the body of the text as “appliances”. This European Standard is applicable to Type A1 appliances only (see 4.3). This European Standard is not applicable to: a) appliances designed for use in domestic dwellings; b) outdoor appliances; c) appliances of heat input in excess of 120 kW (based on the net calorific value of the appropriate reference gas); d) appliances having fully pre-mixed gas and air burners in which: 1) either the gas and all the combustion air are brought together just before the level of the combustion zone; or 2) pre-mixing of the gas and all combustion air is carried out in a part of the burner upstream of the combustion zone. e) appliances in which the supply of combustion air and/or the removal of the products of combustion is achieved by integral mechanical means. This standard is applicable to appliances which are intended to be type tested. Requirements for appliances which are not intended to be type tested would need to be subject to further consideration. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 419-1: 1999, Non-domestic gas-fired overhead luminous radiant heaters — Part 1: Safety 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in Clause 3 of EN 419-1: 1999 apply together with the following. 3.1 radiation reference plane flat horizontal surface bound by the lower edge of the reflector or, in the case where radiant parts project below this lower edge of the reflector, the flat horizontal surface touching the lowest radiant part (see Figure 1)

EN 419-2:2006 (E)
6122 Key

1 Reflector 2 Reference plane Figure 1 — Radiation reference plane 3.2 irradiance (E) radiant power per unit area (W/m2) incident upon a surface 3.3 radiant factor (Rf) heat emitted by the appliance through the radiation reference plane divided by the net heat input of the test gas 3.4 measuring plane (Test method B only) plane parallel to the radiation reference plane and 100 mm ± 3 mm below it 3.5 measuring grid (Test method B only) regular arrangement in the measuring plane of straight lines running parallel and perpendicular to the longitudinal axis of the appliance with sufficient precision (± 1 mm). The nodal points of the measuring grid are located at the points of intersection of these lines (see Figure 2) such that the distance between all adjacent nodes points on these lines is 100 mm ± 2 mm

EN 419-2:2006 (E)
7(0,0)(n, k)132 Key

1 Heater 2 Nodal point 3 Measuring cell Fij Figure 2 — Measuring grid (Test method B) 4 Classification of appliances 4.1 Classification according to the nature of the gases used The requirements of 4.1 of EN 419-1:1999 apply. 4.2 Classification according to the gases capable of being used The requirements of 4.2 of EN 419-1:1999 apply. 4.3 Classification according to the mode of evacuation of the combustion products The requirements of 4.3 of EN 419-1:1999 apply. 5 Symbols The symbols shown in Table 1 are used in this standard. Table 1 — Symbols Symbol Title Unit 2COα Coefficient in equation for kco2 kPa-1 m-1 αOH2 Coefficient in equation for kmo kPo m-1 a Reflector length mm ACO2 Absorption factor of carbon dioxide — AOH2 Absorption factor of water vapour —

EN 419-2:2006 (E)

8Symbol Title Unit ATOT Radiant correction factor for water vapour and CO2 in air (see Annex E) — b Reflector width mm c Distance between two nodal points parallel with the longitudinal axis mm Cαβ Surface area correction factor — D Average thickness of radiating gas layer (from measurement point to radiation reference plane) m CO2ε Emission factor of carbon dioxide — εOH2 Emission factor of water vapour

— E Actual irradiance from overhead radiant heater W/m2 Ea Actual irradiance output by appliance in air W/m2 Eij Irradiance of the appliance measured at the nodal points of the measurement

W/m2 ifE Average irradiance over the measurement grid Fij

W/m2 Fw Window correction factor — Hi Net calorific value of the test gas (at 15 °C, 1013,25 mbar, dry gas) Wh/m3 kCO2 Coefficient in equation for emission factor of carbon dioxide kPa-1 m-1 kOH2 Coefficient in equation for emission factor of water vapour kPa-1 m-1 L Length of reference surface cylinder m N Number of arc positions along the half cylinder (see Figure 2) — n Coefficient in equations for 2COk and 2HOk — 2COP Partial pressure of carbon dioxide in ambient air kPa 2HOP Partial pressure of water vapour in ambient air kPa pmax,H20 Saturated vapour pressure mbar p Gas supply pressure mbar pa Atmospheric pressure mbar pW Saturation vapour pressure of fuel gas at temperature tg mbar Qm Measured heat input based on the net calorific value of the test gas W Q(R)C Radiant output after correction for absorption of radiation in air W Q(R)M Measured radiant output W R Radius to radiometer from centre of reference plane m Rf Radiant factor — S Radiometer sensitivity µV/(W/m2)tA Ambient air temperature °C tg Gas temperature at measuring point °C ts Sensor temperature

°C U Sensor voltage V V Gas volume input at test conditions m3/h Vb Sensor voltage recorded with radiation shield in place µV Vt Sensor voltage recorded without radiation shield in place µV Vo Gas volume rate under reference conditions (at 15 °C, 1013,25 mbar, dry gas) m3/h OH2ε Emissivity of water — 6 Requirements for the rational use of energy When mounted horizontally in accordance with the manufacturer’s instructions and measured by one of the methods given in 7.2 the radiant factor of the appliance, adjusted to the nominal heat input, shall be in accordance with the values given in Table 2.

EN 419-2:2006 (E)

9Table 2 — Radiant factor for appliances mounted horizontally Class Radiant Factor 1 > 0,4 to ≤ 0,5 2 > 0, 5 7 Test methods 7.1 General The test shall be carried out with the appliance mounted horizontally in accordance with the manufacturer’s instructions. The requirements of 7.1 of EN 419-1: 1999 apply unless otherwise specified. 7.2 Radiant factor 7.2.1 General 7.2.1.1 Working area (requirements applicable to all methods of test) The working area shall be of a size to allow installation of the appliance and shall: a) provide sufficient ventilation to remove the combustion products and the heat generated by the appliance; b) have an ambient air temperature of 20 °C ± 5 °C; c) allow the sensors to be positioned free from draughts; The sensor temperature shall be checked before and after measurements are taken and shall: d) for air cooled sensors, be 20°C ± 5 °C; e) for water cooled sensors, the temperature of the cooling water shall not change by more than ± 5 °C during the test. 7.2.1.2 Choice of test method The radiant factor of the appliance may be determined by the method described in 7.2.2 or the method described in 7.2.3. 7.2.2 Method A 7.2.2.1 Installation and adjustment of the appliance The appliance shall be installed at a height of between 2 m and 2,5 m and initially adjusted in accordance with the requirements of 7.1. The test shall be carried out with the appliance adjusted to its nominal heat input or, in the case of a range-rated appliance, to its minimum and maximum nominal heat inputs1 (see 7.1.3.2.3 of EN 419-1:

1 A test at the maximum nominal heat input need not be applied if it is known that the lowest radiant output is achieved at the minimum nominal heat input.

EN 419-2:2006 (E)

101999) and supplied with one of the reference gases for the category to which the appliance belongs (see 7.1.1 of EN 419-1: 1999). 7.2.2.2 Apparatus 7.2.2.2.1 Mechanical apparatus In order to move the sensor positions in an imaginary envelope around the appliance a mobile, rigid test rig having a graduated, circular metal arc, with sensors attached, pivoted on its vertical axis is required.

The radius of the metal arc shall be within the range given in Figure 3. NOTE It is important to check that the maximum irradiance does not exceed the maximum value allowed for the instrument.

EN 419-2:2006 (E)
11 20º40º60º80º100º120º140º160º180º90º0º70º50º30º10ºR12432 Key

1 Removable radiation shield 2 Radiometer 3 Parallel 4 Meridian R The radius measured from the arc centre to the surface of the radiometer.

The radius shall be in the range 1,54 m to 1,88 m.

For any one measurement, the radius shall not vary by more than ± 20 mm Figure 3 — Test rig (Test method A) Test equipment shall: a) for an appliance with a length of more than 1,3 m, have sufficient adjustment to allow the arc centre to coincide with either end of the reference plane; b) for an appliance with a length of 1,3 m or less, the arc centre shall coincide with the centre of the reference plane (see Figure 1). c) be installed in a test area with sufficient floor area to allow marking on the floor for measurement positions; d) have a detachable or retractable radiation shield in front of each sensor to mask it from the appliance. The radiation shield shall be designed and arranged so that the surface of the shield facing the sensor is at thermal equilibrium under the ambient conditions of the working area (see 7.2.1.1). The general arrangement and construction of the radiation shields is given in Figure 4;

EN 419-2:2006 (E)

12e) have an individual radiation shield for each sensor which does not reflect radiation towards any other sensors. f) If appropriate, a guide rail to position the arc along the length of the appliance. 215 + - 5 mm3451> 270 mm> 270 mm Key

1 Radiation shield 2 Sensor 3 Reflective aluminium sheet 4 15 mm insulation (e.g. Rockwool or Polystyrene) 5 Matt black non-reflective surface Figure 4 — Radiometer shield (Test method A) 7.2.2.2.2 Measurement apparatus 7.2.2.2.2.1 Sensor characteristics Sensors used shall: a) have a sensitivity factor that does not change by more than ± 3 % in an ambient temperature range of 15 °C to 30 °C; b) have a sensitivity that is constant either in the wavelength range 0,8 µm to 40 µm, or in another wavelength range which shall be stated in the test report (see 7.2.2.5)2); c) have a span angle ≥ 170 °C. There shall not be a large variation in sensitivity with a change in the radiation angle of incidence; d) have a sensitivity that is constant within an irradiance range of 10 W/m2 to 1 100 W/m2; e) in order to eliminate the influence of draughts on the radiometer, a suitable window shall be installed which shall : 1) have a viewing angle ≥ 170°;

2) This may be necessary for the purposes of calibration.
EN 419-2:2006 (E)

132) maximise radiation transmission in the range 2 µm to 9 µm. The window correction factor (Fw) shall be calculated for each window (see Annex D). 7.2.2.2.2.2 Sensor positions The sensors shall be positioned (see Figures 3, 5a) and 5b)) such that: a) where a single sensor is used, it shall be capable of being moved along the length of the metal arc and of being positioned every 20° ± 1° (between 10° and 90°); b) where multiple sensors are used, they shall be positioned along the length of the arc every 20 °± 1°

(between 10° and 90°); c) the measuring surface shall be tangential to the surface generated by movement of the metal arc

NOTE It is recommended that the face in front of the sensor thermopiles should be protected from irradiance and dust when not being used for taking measurements. Care should be taken to prevent accidental re-radiation from reflecting surfaces (e.g. white clothes and equipment not necessary for the test) within the 180° view of the radiometer.

EN 419-2:2006 (E)

14 170º150º130º110º90º70º50º30º10º90º70º50º30º10ºL/N½L/NL/NLL/NL/NL/N12ADetail A3½ Key

1 Meridian 2 Parallel 3 Identification of sensor positions A Sensor position L Reference surface cylinder length N Number of arc positions along the half cylinder a)

Integrating surface (Test method A) – Appliance greater that 1,3 m in length
EN 419-2:2006 (E)

1590º70º50º30º10º12ADetail A380º120º140º160º180º100º200º220º240º260º280º300º320º340º60º40º20º0º Key

1 Meridian 2 Parallel 3 Sensor position notation A Sensor position b)

Integrating surface (Test method A) – Appliance less than 1,3 m in length Figure 5 — Appliance integrating surface (Test method A) 7.2.2.3 Working area Working areas shall: a) have walls and ceilings that are isolated from exterior influences (e.g. sunlight through windows and other heating equipment);

EN 419-2:2006 (E)

16b) have interior surfaces treated so as to reduce spurious radiation reflection (e.g. matt non-reflective surfaces); c) be arranged such that the wall and ceiling temperatures do not change by more than ± 5 °C during the measurement phase of testing. 7.2.2.4 Procedure 7.2.2.4.1 Integration Surface The integration surface (see Figures 5a) and 5b)) shall be the envelope generated by moving the arc such that: a) for an appliance less than or equal to 1,3 m long, the centre of the hemisphere shall be on the centre of the radiating reference surface; b) for an appliance of length greater than 1,3 m, it describes a half cylinder of length equal to the effective length of the emitter of which the axis coincides with the reference surface. This surface shall be terminated at its extremities by two half hemispheres; c) where the emitter is symmetrical

(e.g. a linear tube) examination of the radiation shall be limited to : 1) in the case of an appliance of less than or equal to 1,3 m long, a quarter hemisphere (the result shall be multiplied by two); or 2) in the case of an appliance of length greater than 1.3 m to a quarter cylinder plus two quarter hemispheres (the result shall be multiplied by two). 7.2.2.4.2 Measurement

Connect each sensor to a milli-voltmeter of the potentiometric type, electronic type or electronic device with an input impedance of at least 1 MΩ and a sensitivity of 1µV. Make the measurements in a still atmosphere with the appliance in thermal equilibrium when operating under the adjustment conditions described in 7.2.2.1. NOTE It is important to measure the outside temperature of the instrument to ensure it is not being overheated. The measurement points shall be situated at the intersection of the parallels and the meridians (see Figures 5a) and 5b)) such that: a) for an appliance less than or equal to 1,3 m long, the measurement point shall be on the hemisphere required for a panel and the intersections shall be at meridians 0°, 20°, 40° etc, up to 180°, with parallels 10°, 30°, 50° etc. up to 90° (see Figure 5b)); b) for an appliance of length greater than 1,3 m, the measurement point shall be on the half hemisphere (see Figure 5a)), the intersections at the extremities shall be at meridians 10°, 30°, 50° etc. up to 170°, with parallels 10°, 30°, 50° etc. up to 90°.

On the half cylinder required for a reference surface of length L for a number of measurements N, the intersections shall be at the points given by Expression (1). 35(21)..........2'2'2'2LLLNLNNNN−

(1)
EN 419-2:2006 (E)

17where : L is the reference surface length; N is the number of measurements taken. with parallels at 10°, 30°, 50° etc up to 90°. L/N shall have a maximum value of 0,8 m. 7.2.2.4.3 Determination of radiant factor The test shall be performed in stages by: a) measuring the voltage at all points shown in the imaginary envelope.

These measurements shall be made with and without the radiation shield in place (see Figure 4). The actual irradiance E can then be calculated using Equation (2). ()tbWVVEFS−=

(2)
where : Vt is the sensor voltag
...

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