EN 14624:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Leistung von mobilen Leckdetektoren und Raumüberwachungsgeräten für halogenierte KältemittelPerformances des détecteurs de fuite portables et des contrôleurs d'ambiance de fluides frigorigènes halogènésPerformance of portable leak detectors and of room monitors for halogenated refrigerants71.100.45Hladiva in antifriziRefrigerants and antifreezes27.200Hladilna tehnologijaRefrigerating technologyICS:Ta slovenski standard je istoveten z:EN 14624:2012SIST EN 14624:2012en,fr,de01-marec-2012SIST EN 14624:2012SLOVENSKI
STANDARDSIST EN 14624:20051DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE 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 détecteurs de fuite portables et des contrôleurs d'ambiance de fluides frigorigènes halogénés
Leistung von mobilen Leckdetektoren und Raumüberwachungsgeräten für halogenierte Kältemittel 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 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 official 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 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
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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: ESIST EN 14624:2012

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 for gas leaks . 23 SIST EN 14624:2012

The hydrogen is completely substituted. 3.5 gas concentration ratio in weight or in volume of a given gas to the total 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 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. SIST EN 14624:2012

5 Types of portable leak detectors and room monitors The types of detectors shown in Table 2 are concerned in this European Standard: Table 2 — Types of detectors
IndicatingMeasuring Room monitor A B Locating leak detector
C D
Both the indicating leak detector and room monitor can be designed with thresholds: either one fixed threshold which is not adjustable or several fixed or adjustable thresholds. Both the measuring leak detector and the room monitor comprise a scale and permit assigning of a measurement value to a gas concentration in the atmosphere. 6 General requirements for all portable leak detectors and room monitors 6.1 Gas type The manufacturer shall specify the gas or the gas(es) that the leak detector is able to detect or measure. 6.2 Capabilities Locating leak detectors or room monitors are single-gas or multi-gas measuring devices. They are selective or non-selective and shall be able to measure or indicate a concentration or leakage rate threshold of halogen gas. Selective locating detectors or room monitors shall be able to identify a specific halogen gas among other gases. Non-selective locating detectors or room monitors cannot identify a specific halogen gas among other gases but they shall detect all halogen gases present in a gas mixture as a sum value. SIST EN 14624:2012

Key
1 sniffer probe
2 test object with leak
d sniffing distance
a) Sniffing distance d during leak search on a test object
Key
1 sniffer probe
3 calibration leak outlet
d sniffing distance
b) Sniffing distance d during calibration with a calibration leak Figure 1 — Sniffing distance
7.2 Lowest detectable leakage rate threshold when the leak detector is stationary The leak detector with the probe held stationary in front of a leak at a distance of 3 mm shall give a visual or acoustical alarm indicating that the threshold value set equal to the leakage rate value has been exceeded. Testing conditions are detailed in 11.1. 7.3 Lowest detectable leakage rate threshold value when the detector probe is moving The detector probe, when moved across a leak passing at a speed of 2 cm/s and a distance of 3 mm in front of the leak exit, shall be able to repeatedly detect this leakage rate. Testing conditions are detailed in 11.1. 7.4 Leak detection in a contaminated environment The leak detector shall be able to compensate for a slowly varying contaminating concentration of the halogen refrigerant and retain its detection ability for leak location. SIST EN 14624:2012
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