SAE J1771-1998 Criteria for Refrigerant Identification Equipment for Use with Mobile Air-Conditio.pdf
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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 therefr
2、om, 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. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1998 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 STANDARD Submitted for recognition as an American National Sta
4、ndard J1771 REV. NOV1998 Issued1996-11 Revised1998-11 Superseding J1771NOV96 Criteria for Refrigerant Identification Equipment for Use with Mobile Air-Conditioning Systems Foreword The purpose of this SAE Standard is to establish criteria for refrigerant identification equipment intended for use wit
5、h or without recycling equipment when removing refrigerant from Mobile Air-Conditioning (A/C) Systems or from refrigerant containers prior to charging a mobile A/C system. Establishing such specifications will provide a means to identify relatively pure refrigerant CFC-12 (R-12) or HFC-134a (R-134a)
6、 from mixtures of refrigerants (HFC, HCFC, CFC, hydrocarbons, etc.), in a mobile system prior to recovering/recycling (R/R) the refrigerant or prior to charging an A/C system from a refrigerant container. 1.Scope This SAE Standard applies to refrigerant identification equipment to be used for identi
7、fying refrigerant CFC-12 (R-12) and HFC-134a (R-134a) refrigerant when servicing a mobile A/C system or for identifying refrigerant in a container to be used to charge a mobile A/C system. Identification or other refrigerants are the option of the equipment manufacturer. 2.References 2.1Applicable P
8、ublications The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1SAE PUBLICATION Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J639 Safety and Conta
9、inment of Refrigerant for Mechanical Vapor Compression Systems Used for Mobile Air-Conditioning Systems 2.1.2UL PUBLICATION Available from Underwriters Laboratories, Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096. (1-800-704-4050) UL 1604 Electrical Equipment for Use in Class I and II, Division
10、 2 and Class III Hazardous (Classified) Locations 3.Equipment evaluated under this document shall have the following specification and general description. 3.1The equipment shall be suitable for use in an automotive service garage environment and be capable of continuous operation in ambients from 1
11、0 to 49 C. SAE J1771 Revised NOV1998 -2- 3.1.1Equipment may be design certified as a Refrigerant Diagnostic Tool or as a Refrigerant Identifier when tested per 5.8. 3.1.2REFRIGERANT DIAGNOSTIC TOOL Equipment that will identify the refrigerant to 98, 96, 94, 92, or 90% purity and will also identify 5
12、, 10, 15, or 20% of air in the refrigerant. The tool shall have an accuracy of 1% for the refrigerant and 1% for the air. Higher accuracy s are permitted at the manufacturer s request. 3.1.3REFRIGERANT IDENTIFIER Equipment that will identify the refrigerant to 90% purity or lower shall have an accur
13、acy of 3%. 3.2This document is to certify the equipment for identification of CFC-12 (R-12) and HFC-134a (R-134a). However, the equipment may be certified to identify as many refrigerants or substances in accordance with the manufacturer s design. 3.2.1The equipment shall have an accuracy as noted i
14、n 3.1.2 or 3.1.3. If the unit is designed to identify refrigerants other than CFC-12 (R-12) and/or HFC-134a (R-134a), the same accuracy shall apply. 3.2.2Equipment that displays a visual percentage outside of the design certified percent purity level is informational and may not be accurate. See 4.6
15、. 3.2.3To prevent possible refrigerant contamination the equipment shall comply with Federal requirements that a unique separate hose assembly be used with a permanently attached service port fitting, for each type of refrigerant being identified. 3.3The equipment shall be certified that it meets th
16、is specification by Underwriters Laboratories, Inc. (UL) or by an equivalent independent nationally recognized testing laboratory. The laboratory shall maintain documentation of testing to this specification for each model certified, including all calibration data and equipment calibration dates for
17、 a period of 5 years. 3.4The equipment shall be marked as indicated in 3.4.1 or 3.4.2. The marking shall be in bold-type letters, a minimum of 3 mm in height, where “X” is replaced by the designation of the refrigerant for which the equipment was certified to identify, “Y” is replaced by the percent
18、 value (of refrigerants) in 2% increments, and “Z” (where applicable) is replaced by the percent value (of air) in 5% increments. 3.4.1A refrigerant diagnostic tool shall have a label which states “Refrigerant Diagnostic Tool Design Certified by (Certifying Agent) to meet SAE J1771 to identify X to
19、Y percent purity. Also this equipment will detect Z percent or greater of air in X .” As an example, for a diagnostic tool that meets this specification to identify R12 and R134a by ABC Company, to 90% purity and to detect 5% air, the label would read “Refrigerant Diagnostic Tool Design Certified by
20、 ABC Company to Meet SAE J1771 to Identify CFC-12 (R-12) or HFC-134a (R-134a) to 98% purity. Also, this equipment will detect 5% or greater of air in CFC-12 (R-12) or HFC-134a (R-134a). 3.4.2A refrigerant identifier shall have a label which states “Refrigerant Identifier Design Certified by (Certify
21、ing Agent) to Meet SAE J1771 to identify X to Y purity.“ As an example, for an identifier that meets this specification to identify CFC-12 (R-12) and HFC-134a (R- 134a) by ABC Company, to 90% purity, the label would read-“Refrigerant Identifier Design Certified by ABC Company to Meet SAE J1771 to id
22、entify CFC-12 (R-12) or HFC-134a (R-134a) to 90% purity.” 3.4.3If the equipment does not meet the requirements in 4.6 it shall also have a label located near the visual percentage display indication, “For Accuracy, see Manual.“ SAE J1771 Revised NOV1998 -3- 4.Operating Instructions 4.1The equipment
23、manufacturer shall provide operating instructions, including warm-up time (if needed), calibration, parts replacement list, and use instructions. The instructions shall include any other necessary maintenance procedures, source information for replacement parts and repair, and safety precautions. 4.
24、2For equipment certified as a refrigerant identifier, the operating instruction manual shall clearly indicate that the percent of refrigerant purity that is indicated, includes the percent amount of air that may be in refrigerant being tested but does not identify the air as a containment. The follo
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