1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/J1627_201104SURFACEVEHICLESTANDARDJ1627 APR2011 Issued 1993-06 Stabilized 2011-04 Superseding J
5、1627 AUG95 Performance Criteria for Electronic Refrigerant Leak Detectors RATIONALE The technical report covers technology, products, or processes which are mature and not likely to change in the foreseeable future. STABILIZED NOTICE This document has been declared “Stabilized“ by the SAE Interior C
6、limate Control Committee and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability of technical requirements. Newer technology may exist. Copyright SAE International Provided by IHS under license with SAENot for ResaleN
7、o reproduction or networking permitted without license from IHS-,-,-SAE J1627 Stabilized APR2011 Page 2 of 6 ForewordThe purpose of this SAE Standard is to establish minimum performance criteria for electronic probe-type leak detectors intended for use in servicing mobile air-conditioning systems.1.
8、 ScopeThis SAE Standard applies to electronic probe-type leak detectors used to service motor vehiclepassenger compartment air-conditioning systems. This document does not address any safety issuesconcerning their design or use.2. References2.1 Applicable PublicationThe following publication forms a
9、 part of this specification to the extent specifiedherein. Unless otherwise specified, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1628 Technician Procedure for Using Electronic Refrigerant Leak Dete
10、ctors for Service of MobileAir Conditioning Systems3. Specification and General Description3.1 The equipment shall be suitable for use in an automotive service garage environment and be capable ofcontinuous operation in ambients from 15 to 49 C (60 to 120 F).3.2 The equipment shall be certified that
11、 it meets this specification by a qualified independent certifying laboratory.The laboratory shall maintain documentation of testing to this specification for each model certified, includingall calibration data and equipment calibration dates for a period of 5 years following the end of the producti
12、onrun for a certified unit.3.3 The equipment shall have a label which states “Design Certified by (Certifying Agent) to Meet SAE J1627 for#“ in bold-type letters, a minimum of 3 mm in height, where “#“ is replaced by the designation for therefrigerant(s) for which the equipment was certified. As an
13、example, for a device which is certified as meetingthis specification for CFC-12, HCFC-22, and HFC-134a by XYZ Company, the label would read“DesignCertified by XYZ Company to Meet SAE J1627 for R12, R22, and R134a.“Copyright SAE International Provided by IHS under license with SAENot for ResaleNo re
14、production or networking permitted without license from IHS-,-,-SAE J1627 Stabilized APR2011 Page 3 of 6 4. Operating Instructions4.1 The equipment manufacturer shall provide operating instructions, including calibration, sensor replacement,and use instructions. The use instructions shall include th
15、e SAE J1628, Section 3 for Electronic Probe TypeDetectors. Also to be included are any other necessary maintenance procedures, source information forreplacement parts and repair, and safety precautions.4.2 For the instructions included with the detector, 3.9.1 of SAE J1628 shall be replaced by “The
16、accumulation timefor evaporator testing is # min“ where # is calculated as in Equation 1. This calculation provides roughlythe same sensitivity as the basic scanning sensitivity for an evaporator case volume of 0.0015 m3, andproportionally lower sensitivity for larger volumes.(Eq. 1)where:Time = Eva
17、porator test accumulation time in minutesConcentration = Concentration in ppmvwhich causes the detector to alarm5. Functional Description5.1 The equipment shall self-calibrate or be user calibrated per the manufacturers operating instructions. Theequipment shall be equipped with all tools, instrumen
18、ts, and standards needed (if any) for user calibration ifthey are not typical of a service garage.5.2 Once calibrated to the manufacturers specifications, the equipment shall maintain stability in a service garageenvironment, or warn of significant change.6. Testing of Electronic Probe-Type Leak Det
19、ectorsThis test procedure and its requirements shall be usedto test the performance of leak detector equipment.6.1 Leak Standards6.1.1 Leak standards used in this testing shall be calibrated by methods and instruments traceable to NIST.Washington, DC 20234 (National Institute of Standards and Techno
20、logy) to meet leak rate requirements asfollows:a. Test Leak Standard at Standard Conditions8-10x105cm3/s (8-10x1011m3/s)b. Leak Rate in Common Units14 g/year (0.5 oz/year)6.1.2 The opening of the leak standard shall conform to the dimensions in Figure 1.6.1.3 Leak standards shall be manufactured for
21、 the specific refrigerant for which they will be used. Leak standardsshall not be converted between different refrigerants, since even trace amounts of residual refrigerant canaffect detector sensitivity.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction
22、or networking permitted without license from IHS-,-,-SAE J1627 Stabilized APR2011 Page 4 of 6 FIGURE 1LEAK S TANDARD PORT CONFIGURATIONCopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J1627 Stabil
23、ized APR2011 Page 5 of 6 6.2 Test EquipmentFigure 2FIGURE 2TEST EQUIPMENT6.2.1 The tests shall be conducted in an enclosure containing still pure air at constant 22 C 2 C (68 F 4 F)at 101 kPa 3 kPa absolute.6.2.2 A table capable of supporting and positioning the leak detector probe assembly and capa
24、ble of horizontalmovement of at least 100 mm 10 mm (4.0 in 0.4 in) displacement total at a rate of 50 mm/s 5 mm/s (2.0in/s 0.2 in/s) over at least 80 mm (3.0 in) of its travel shall be installed in the enclosure. The time for onecomplete cycle (back and forth), measured at the center of travel, shal
25、l not exceed 8 s.6.2.3 A stand for positioning the leak standard orifice at least 100 mm (4 in) above the base of the enclosure shallbe provided. The leak standard shall rest on the stand so that the orifice end hangs over the edge of thestand by a distance of at least 3 mm (0.1 in), and is position
26、ed at the midpoint of the probe tabledisplacement.6.3 Test Procedure6.3.1 Turn on and calibrate the leak detector per the manufacturers operation instructions.6.3.2 Within the enclosure, mount the detector probe on the movable table.6.3.3 Allow the detector to sit idle but turned on for 5 min to tes
27、t stability.6.3.4 Outside the enclosure, set the leak standard to the rate specified in 6.1.1.6.3.5 Install the calibrated leak standard on the stand in the enclosure.Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without licen
28、se from IHS-,-,-SAE J1627 Stabilized APR2011 Page 6 of 6 6.3.6 Adjust the distance from the end of the orifice to the tip of the probe so that at their closest point they are nocloser than 5.0 mm 0.5 mm (0.25 in 0.02 in). Any angle or offset of the probe relative to the orifice isallowed, if noted i
29、n the operating instructions, to optimize the test.6.3.7 If purge gas is supplied to the enclosure, stop its flow just prior to test.6.3.8 Initiate table motion.6.3.9 Ignore the first three passes made by the probe to the standard.6.3.10 ACCEPTANCE CRITERIAThe detector shall emit a clear signal for
30、at least 9 of the next 10 passes of the probeby the orifice of the leak standard. A definite, discernible reduction in, or end to, the signal shall occurbetween each signal.6.3.11 Stop table motion.6.3.12 Remove the leak standard to maintain enclosure air purity.6.3.13 If purge gas is supplied to th
31、e enclosure, restart its flow.7. Notes7.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE ICC STANDARDS COMMITTEECopyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
