1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2333 Infrared Thermometers STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED
2、 FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Infrared Thermometers, UL 2333 Third Edition, Dated May 31, 2016 Summary of Topics This Third Edition of ANSI/UL 2333 has been issued to remove the reference to the withdrawal date of UL 873 and to addres
3、s universal upkeep of UL Standards for Safety. Any changes are considered to be non-substantive and not subject to ULs STP process. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photoc
4、opying, recording, or otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special,
5、incidental, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no e
6、vent shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or ju
7、dgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. MAY 31, 2016 UL 2333 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
8、N FROM UL MAY 31, 2016 UL 2333 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 31, 2016 1 UL 2333 Standard for Infrared Thermometers First Edition May, 2001 Second Edition March, 2008 Third Edition May 31, 2016 Th
9、is ANSI/UL Standard for Safety consists of the Third edition. The most recent designation of ANSI/UL 2333 as an American National Standard (ANSI) occurred on July 8, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. Comments or proposals for revisi
10、ons on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard sho
11、uld be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 2333-2003 (R2014)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
12、ION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Devices 5 3 Reference publications 5 4 Units
13、 of Measurement .6 5 Denitions 6 6 Components 6 CONSTRUCTION 7 Enclosures and Lenses 7 8 Operating Mechanism .7 9 Accessories 8 10 Batteries 8 11 Lasers 8 12 User Information .9 13 Power Supplies 9 PERFORMANCE 14 General .9 15 Initial Accuracy Verication Test .9 16 Ambient Temperature Accuracy Veric
14、ation Tests 10 16.1 General .10 16.2 Extended exposure conditioning .10 16.3 Extreme ambient conditioning 10 17 Ambient Moisture Accuracy Verication Test .11 18 Resistance to Electrostatic and Electromagnetic Noise Accuracy Verication Tests .11 18.1 General .11 18.2 Electrostatic discharge immunity
15、.11 18.3 Radiated electromagnetic eld immunity 12 19 Mechanical Abuse Accuracy Verication Test 12 MARKING 20 General 13 INSTRUCTIONS 21 Use and Care Instructions .14 MANUFACTURING AND PRODUCTION TESTS 22 General 16 APPENDIX A Standards for ComponentsA1 MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 3U
16、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX B B1 Use and Care Instruction Manual Example B1 MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PER
17、MISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover portable, battery operated infrared thermometers and accessories affecting accuracy intended for food safety. 1.2 These requirements do not cover temperature indicating devices intended for non-food uses. 2 Devices 2.1 The devices cov
18、ered by this standard are evaluated for their intended use as SCREENING TOOLS only. As such, they are not intended to take the place of or supersede the readings of food contact thermometers used in accordance with the FDA Food Code or the related requirements of Authorities Having Jurisdiction. 2.2
19、 The devices indicate surface temperature at a minimum accuracy of 2.2C (4F) for food product surfaces at 60C (140F) and 5C (41F). This accuracy is determined at an intended use range of 2.54 cm (1 in) to 30.5 cm (1 ft) with a surface area larger than the area of measurement of the unit in a range o
20、f ambient air temperatures. 2.3 Because external environmental use conditions, thermal shock, cleanliness of optics, mechanical abuse and other use factors inuence the accuracy of the devices, the operator needs to adhere to all manufacturers instructions for their use and care. 3 Reference publicat
21、ions 3.1 Equipment shall comply with the applicable requirements of the following publications: a) Food and Drug Administration (FDA) Food Code, 1999; b) Code of Federal Regulations (CFR), Title 21, Chapter I, Subchapter J, 1999; c) International Electrotechnical Commission 1000-4-2 (IEC 1000-4-2):
22、Electromagnetic Compatibility (EMC) Part 4; Testing and Measuring Techniques Section 2: Electrostatic Discharge Immunity Test Basic EMC Publication (1995); d) International Electrotechnical Commission 1000-4-3 (IEC 1000-4-3): Electromagnetic Compatibility (EMC) Part 4; Testing and Measurement Techni
23、ques Section 3: Radiated, Radio Frequency, Electromagnetic Field Immunity Test (1995); e) Standard for Marking and Labeling Systems, UL 969; and f) Standard for Class 2 Power Units, UL 1310 3.2 Any undated reference to a code or standard appearing in the requirements of this standard shall be interp
24、reted as referring to the latest edition of that code or standard. MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Units of Measurement 4.1 Values stated without parentheses are the requirement
25、. Values in parentheses are explanatory or approximate information. 5 Denitions 5.1 For the purpose of this standard, the following denitions apply. 5.2 FIELD OF VIEW Ratio of distance to spot area. 5.3 INFRARED THERMOMETER Opto-electronic instrument adapted for non-contact measurement of temperatur
26、e of a surface by utilizing infrared radiation exchange between the surface and the sensor. 5.4 THERMAL SHOCK The result of an abrupt change in ambient temperature affecting the accuracy of the device. 6 Components 6.1 Except as indicated in 6.2, a component of a product covered by this standard sha
27、ll comply with the requirements for that component. See Appendix A for a list of standards covering components used in the products covered by this standard. 6.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the applicat
28、ion of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 6.3 A component shall be used in accordance with its rating established for the intended conditions of use. 6.4 Specic components are incomplete in construction features or restricted
29、 in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR
30、FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONSTRUCTION 7 Enclosures and Lenses 7.1 Enclosures and lenses shall be constructed of non-toxic, corrosion-resistant, nonabsorbent materials allowing effective removal of soil by normal, manual cleaning methods. 7.2 The enclosure shall
31、 be formed and assembled so that it will have the strength and rigidity necessary to resist the abuses to which it may be subjected, without increasing the risk of inaccurate temperature display by dislocation of protective lenses, creation of openings, or loosening of parts. 7.3 Polymeric materials
32、 used in enclosures and lenses shall comply with Ambient Temperature Accuracy Verication Test, Section 16. 7.4 Materials that shatter or leave shards shall not be used. Exception No. 1: This requirement does not apply to a lens that is no larger than technically required and is located such that it
33、is protected against impact as determined by a 12.7 mm (0.5 in) diameter hemispherical rod. Exception No. 2: This requirement does not apply to a visual display or lens that remains intact following testing as described in Section 19, Mechanical Abuse Accuracy Verication Test. 7.5 External surfaces
34、shall be free of any ledges, projections, and crevices that are decorative or gratuitous and are not required for effective design or proper operation of the equipment. 7.6 Fasteners shall not have deep recesses or wells in the head. Slot, hex and Phillips head screws and ush break pop rivets are co
35、nsidered acceptable. Allen head screws and non-ush break pop rivets are not considered acceptable. The fastener shall t tight against the enclosure surface. A maximum of one washer may be used under the fastener head. An external tooth washer is not acceptable. 8 Operating Mechanism 8.1 A device sha
36、ll be assembled so that it will not be adversely affected by the vibration of normal operation. 8.2 The position of all user adjustments and controls shall be marked to indicate proper operation. MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
37、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9 Accessories 9.1 A device having provisions for the use of an accessory intended to be attached in the eld (e.g. printer, data logger) shall comply with the requirements in this standard, with and without an accessory installed. 9.2 Installation of a
38、n electrical accessory by the user shall be by means of a receptacle and plug-in connector. 9.3 The installation of an electrical accessory by service personnel shall be by means of receptacles, plug-in connectors, insulated wire connectors, or by connection to existing wiring terminals. 9.4 With re
39、ference to 9.3, an installation shall not require the cutting of wiring or the soldering of connections by the installer. Installations shall not require cutting, drilling, or welding in electrical enclosures and in other areas where such operations may damage electrical and optical components and w
40、iring within the enclosure. 9.5 An accessory is to be trial installed to determine that the installation is feasible, the instructions are detailed and correct, and the use of the accessory does not adversely affect the accuracy of the device. 10 Batteries 10.1 Batteries shall be replaceable without
41、 causing damage to the device or its components. 10.2 A battery compartment intended for the use with rechargeable batteries that emit gases during charging shall be provided with vent holes and a coating that is resistant to the corrosive action of the electrolyte. 10.3 The device shall alert the u
42、ser when the battery becomes discharged and the device accuracy is affected as specied in Section 15, Initial Accuracy Verication Test. The indication shall be audible or visible at the discharge condition that initiates inaccurate readings. 11 Lasers 11.1 Devices that use a laser shall comply with
43、the current construction and labeling requirements of the U.S. Code of Federal Regulations (CFR), Title 21, Chapter I, Subchapter J, Sections 1010.2 and 1010.3 and Sections 1040.10 and 1040.11. MAY 31, 2016 INFRARED THERMOMETERS - UL 2333 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
44、ION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 12 User Information 12.1 The device shall be capable of providing an indication of the measured temperature in degrees Celsius, degrees Fahrenheit, or any other scalable format. 12.2 The device shall be provided with a means of sighting. The means can b
45、e mechanical or optical. 13 Power Supplies 13.1 External power supplies or battery charging devices shall comply with the Standard for Class 2 Power Units, UL 1310. PERFORMANCE 14 General 14.1 The performance of an infrared thermometer shall be evaluated as described in Sections 15 19. Unless otherw
46、ise specied, each test is to be performed on one sample. With the agreement of the manufacturer, more than one test may be conducted using the same sample. Insofar as is practicable, the tests shall be conducted in the order in which they are presented. 14.2 For the tests, it may be necessary or pre
47、ferable to modify the device to permit remote actuation of temperature measurement and/or temperature recording. Any modications made to the device shall be acceptable to the manufacturer and shall not adversely affect or enhance device accuracy. 15 Initial Accuracy Verication Test 15.1 When tested
48、as described in 15.2 15.6, no individual reading of a device shall indicate a surface temperature with less accuracy than 2.2C or 4F, as appropriate. 15.2 The initial accuracy verication test on a device is to be performed on a representative production sample that has been produced and calibrated w
49、ithin the same tolerances permitted in factory production. Devices that have multiple set points and display modes shall be tested at the maximum and minimum set points and in each display mode. Exception No. 1: Devices intended for multiple applications that are marked food temperature or equivalent at the relevant operating mechanism settings. Exception No. 2: Devices that have toggled Celsius / Fahrenheit display modes may be tested in only one mode, whichever
