1、April 2012 Translation by DIN-Sprachendienst.English price group 12No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、23.040.99; 71.100.45!$?,“1882809www.din.deDDIN EN 14624Performance of portable leak detectors and of room monitors forhalogenated refrigerantsEnglish translation of DIN EN 14624:2012-04Leistung von mobilen Leckdetektoren und Raumberwachungsgerten fr halogenierteKltemittelEnglische bersetzung von DIN
3、 EN 14624:2012-04Performances des dtecteurs de fuite portables et des contrleurs dambiance de fluidesfrigorignes halognsTraduction anglaise de DIN EN 14624:2012-04SupersedesDIN EN 14624:2005-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document compr
4、ises 25 pages03.12 DIN EN 14624:2012-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 182 “Refrigerating systems, safety and environmental requirements” (Secretariat: DIN, Germany). The responsible German body involved in its
5、 preparation was the Normenausschuss Kltetechnik (Refrigeration Technology Standards Committee), Working Committee NA 044-00-01 AA Sicherheit und Umweltschutz. Amendments This standard differs from DIN EN 14624:2005-06 as follows: a) Clause 3 “Terms and definitions” has been revised; b) Clause 11 “P
6、erformance tests” has been completely revised; c) an informative Annex B “Correlation between test gas concentration and leakage rate” has been added; d) an informative Annex C “Guidelines for monitoring a machinery room or space for gas leaks” has been added. Previous editions DIN EN 14624: 2005-06
7、 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14624 January 2012 ICS 23.040.99; 71.100.45 Supersedes EN 14624:2005English Version Performance of portable leak detectors and of room monitors for halogenated refrigerants Performances des dtecteurs de fuite portables et des contrleurs dambiance
8、 de fluides frigorignes halogns Leistung von mobilen Leckdetektoren und Raumberwachungsgerten fr halogenierte Kltemittel This European Standard was approved by CEN on 19 November 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
9、 this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three offici
10、al versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of A
11、ustria, Belgium, Bulgaria, Croatia, 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, Turkey and United Ki
12、ngdom. Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14624:2012: EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEN 1462
13、4:2012 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .54 Symbols and abbreviations 75 Types of portable leak detectors and room monitors 76 General requirements for all portable leak detectors and room monitors 76.1 Gas type 76.2 Capabilities .76.3 Output sig
14、nal 86.4 Response time .86.5 Recovery time (clean up time) 86.6 Repeatability .86.7 Calibration 87 Specific requirements for locating portable leak detectors 87.1 General 87.2 Lowest detectable leakage rate threshold when the leak detector is stationary 97.3 Lowest detectable leakage rate threshold
15、value when the detector probe is moving .97.4 Leak detection in a contaminated environment .98 Specific requirements for room monitors 108.1 General . 108.2 Lowest detectable concentration (lower detection limit) . 108.3 Highest tolerable concentration (upper detection limit) . 108.4 Upper and lower
16、 alarm thresholds 108.5 Response time for alarm trigger . 109 Calibration leaks . 109.1 General . 109.2 Calibration gases 1010 Test apparatus 1110.1 General . 1110.2 Apparatus no. 1: detector probe stationary at the orifice of a calibration leak . 1110.3 Apparatus no. 2: detector probe moved with de
17、fined speed and distance in front of a calibration leak 1110.4 Apparatus no. 3: Chamber with monitored concentration . 1211 Performance tests. 1211.1 Performance test of locating leak detector 1211.1.1 Test no. 1: Static detection 1211.1.2 Test no. 2: dynamic detection limit . 1311.1.3 Test no. 3: d
18、etection limit in contaminated environment . 1311.1.4 Test no. 4: recovery time . 1311.2 Performance tests of room monitor 1311.2.1 General . 1311.2.2 Test a) to determine the upper and lower detection limits . 1311.2.3 Test b) to determine response time 1411.2.4 Test c) to determine recovery time f
19、rom exposure to a large concentration . 1412 Instrument characteristics and reporting of test results 15DIN EN 14624:2012-04 EN 14624:2012 (E) 3 12.1 Characteristics of locating leak detector 1512.2 Characteristics of room monitors 1513 Technical data 1613.1 Locating leak detectors 1613.2 Measuring
20、leak detectors . 1613.3 All portable leak detectors 1613.4 Room monitor 16Annex A (informative) Conversion factors of leakage rate units . 18Annex B (informative) Correlation between test gas concentration and leakage rate 19Annex C (informative) Guidelines for monitoring a machinery room or space f
21、or gas leaks 23DIN EN 14624:2012-04 EN 14624:2012 (E) 4 Foreword This document (EN 14624:2012) has been prepared by Technical Committee CEN/TC “Refrigerating systems, safety and environmental requirements “, the secretariat of which is held by DIN. This European Standard shall be given the status of
22、 a national standard, either by publication of an identical text or by endorsement, at the latest by July 2012, and conflicting national standards shall be withdrawn at the latest by July 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of pat
23、ent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14624:2005. The following changes have been made during revision: a) Clause 3 “Terms and definitions“ has been revised; b) Clause 11 “Performance tests“ has been co
24、mpletely revised; c) Annex B “Correlation between test gas concentration and leakage rate“ has been modified; d) Annex C “Guideline for monitoring a machinery room or space for gas leaks“ has been included. According to the CEN/CENELEC Internal Regulations, the national standards organizations of th
25、e following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania
26、, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 14624:2012-04 EN 14624:2012 (E) 5 1 Scope The purpose of this European Standard is to qualify the performance of portable sniffing leak detectors and room monitors for halogenated refrigerants. These leak detecto
27、rs are designed for the detection of CFC, HCFC, HFC and PFC halogenated gases, and their detection limit is checked with a calibration leak or calibration gas. 2 Normative references Not applicable. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.
28、 3.1 chloro-fluoro-carbon (CFC) fully halogenated halocarbon composed only of chlorine, fluorine and carbon NOTE The hydrogen is completely substituted. 3.2 hydro-chloro-fluoro-carbon (HCFC) partly halogenated halocarbon composed only of hydrogen, chlorine, fluorine and carbon 3.3 hydro-fluoro-carbo
29、n (HFC) partly fluorinated halocarbon composed only of hydrogen, fluorine and carbon 3.4 perfluoro-carbon (PFC) fully fluorinated halocarbon composed only of fluorine and carbon NOTE The hydrogen is completely substituted. 3.5 gas concentration ratio in weight or in volume of a given gas to the tota
30、l weight or volume of the gas mixture NOTE 1 The concentration is dimensionless and is designated either with ppm (m/m) = parts per million (mass) or ppm (V/V) = parts per million (volume). NOTE 2 ppm: statement of concentration for gases; parts per million expressed in volume per volume ratio. 3.6
31、leakage rate gas flow through a fissure, an orifice or aperture of specified size NOTE 1 The usual leakage rate unit is gram per year (g/a), see Annex A (informative). NOTE 2 The gas flow channels are some micrometers of diameter and have a large length/diameter ratio. DIN EN 14624:2012-04 EN 14624:
32、2012 (E) 6 3.7 room monitor fixed device, with one or several sensors, permitting the indication or the measurement of concentrations of halogen gases in the atmosphere at one or several points in one room or in several rooms 3.8 locating leak detector either indicating or measuring portable leak de
33、tector with a detector probe capable of localizing a leak by measuring a local gas concentration with short response time 3.9 indicating leak detector leak detector indicating one or several levels of concentration or leakage rate thresholds, but with no indication of the measured value 3.10 measuri
34、ng leak detector leak detector that measures leakage rates or concentrations and displays the respective value 3.11 calibration leak device with a defined flow rate of a given gas under defined pressure and temperature conditions used to calibrate a leak detector NOTE Calibration leaks are themselve
35、s calibrated according to operation conditions (upstream and downstream pressure) against a primary or secondary standard that is traceable to national standards (standard leak). 3.12 response time time elapsing from the moment the probe is placed into a concentration or exposed to a calibration gas
36、 or in front of a leak until an alarm is triggered 3.13 recovery time time required for a leak detection system or room monitor to indicate the lower detection limit again after exposure to a specified large leakage rate or concentration without any manual zeroing operation 3.14 zeroing time (for le
37、ak detectors) time from immersion of the probe into a fixed concentration of halogen gas until indicated zero is stable (automatically or after a zeroing action specified by the manufacturer) 3.15 detection limit (lower, upper) minimum or maximum detectable concentration or leakage rate which can be
38、 indicated with specified uncertainty and/or for which an alarm level can be set and is repeatedly triggered 3.16 alarm set points one or more preset alarm set points/thresholds at which an alarm level(s) can be set and which can be repeatedly triggered by the appropriate concentration DIN EN 14624:
39、2012-04 EN 14624:2012 (E) 7 4 Symbols and abbreviations Table 1 Symbols and abbreviations Symbol Description Unit Vacc accumulation volume m3Vmol molar volume m3M molar mass g/mol m dynamic upper and lower detection limits for the alarm triggers of locating leak detectors. 13.2 Measuring leak detect
40、ors The product data sheet shall specify the following technical data: static upper and lower detection limits for the indication of concentrations or leakage rate values by measuring leak detectors; dynamic upper and lower detection limits for the indication of concentrations or leakage rate values
41、 by measuring leak detectors. 13.3 All portable leak detectors The product data sheet shall specify the following technical data: response time; zeroing time; recovery time; lower detection limit in halogen gas contaminated environment; re-calibrating frequency; directions for use; safety instructio
42、ns; leak detector weight. 13.4 Room monitor The product data sheet shall specify the following technical data for concentration measurement: upper and lower detection limits; pre-set alarm point(s); response time to the lower alarm set point or measurement value specified e.g. 50 % full scale; respo
43、nse time to the upper alarm set point, if provided, or measurement value specified e.g. 90 % of full scale; recovery time; check/calibration frequency as specified in 6.7; DIN EN 14624:2012-04 EN 14624:2012 (E) 17 installation instruction including guidelines for sensor locations in the room to be c
44、ontrolled; directions for use; safety instructions. DIN EN 14624:2012-04 EN 14624:2012 (E) 18 Annex A (informative) Conversion factors of leakage rate units Table A.1 Most common units y x Pa m3/s or W Torr l/s atm cm3/s mbar l/s 1 Pa m3/s or W 1 7,5 9,87 10 1 Torr l/s 0,133 1 1,32 1,33 1 atm cm3/s
45、0,101 3 0,76 1 1,013 1 mbar l/s 0,1 0,75 0,987 1 Table A.2 Other units Y X Pa m3/s lusec (micron 1/s) m ft3/s std cm3/s atm ft3/mn mol/s Pa m3/s 1 7,5 103 2,65 102 9,87 2,097 10-2 4,403 10-4 lusec (micron 1/s) 1,33 10-4 1 3,53 10-2 1,32 10-3 2,795 10-6 5,87 10-8 m ft3/s 3,76 10-3 2,83 10 1 3,71 10-2
46、 7,92 10-5 1,662 10-6 std cm3/s 1,013 10-1 7,6 102 2,67 10 1 2,12 10-3 4,461 10-5 atm ft3/mn 4,78 10 3,58 105 1,264 104 4,72 102 1 2,105 10-2 mol/s 2,271 103 1,703 107 6,016 105 2,24 104 47,49 1 DIN EN 14624:2012-04 EN 14624:2012 (E) 19 Annex B (informative) Correlation between test gas concentratio
47、n and leakage rate EXAMPLE 1a Conversion of a concentration increase in a hood to a total leakage volume flow rate (pV-throughput) A test object pressurized with halogen gas should be tested for overall leakage. It is therefore placed in an envelope of given volume where the escaping halogen gas can accumulate for a definite period of time. After that time, the resulting concentration increase in the envelope measured with a leak detector probe (by puncturing the envelope with the probe tip). The following assumptions are made: the envelope has a free volume (between test object and outer vol
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