UL 982 CRD-2015 UL Standard for Safety Motor-Operated Household Food Preparing Machines - Section Paragraph Reference 6 5 2 2 7 28 4 61 5 73 2 Subject Blender with Capacitive Touc.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a

2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): IPWZStandard Number: UL 982Standard Title: Standard for Motor-Operated Household Food Preparing MachinesEdition Date: June 10, 2015Edition Number: 7Section /

3、 Paragraph Reference: 6.5.2.2, 7, 28.4, 61.5, 73.2Subject: Blender with Capacitive Touch Screen ControlDECISION:6.5.2.2 A control limiting the operating time during normal operation, starting or stopping the motor, andany control required for compliance with this standard during normal operation of

4、the appliance shall beevaluated as an operating control.Exception No. 1: An electronic control acting as an interlock required for compliance with this standard,shall be evaluated as a protective control.Exception No. 2: An electronic control starting or stopping the motor shall be evaluated as an a

5、uxiliarycontrol if:a) The appliance has no accessible moving parts during normal operation likely to cause injury;b) The electronic control is placing the appliance in stand-by mode, where a single malfunctionof a component can cause unexpected operation, in accordance with the Exception to 26.12; o

6、rc) During the Electronic Control Circuits Test of Section 50, malfunction or breakdown of acomponent does not result in loss of OFF control or unexpected operation of the motor.Exception No. 3: A capacitive touch screen control on a blender with a two-step ON function as specifiedin 28.4.16 shall a

7、dditionally be subjected to the following without loss of the two-step ON function:a) Electronic Control Circuits Test of Section 50,b) Electrostatic Discharge of in accordance with IEC 61000-4-2, test level 4 being applicable.Ten discharges having a positive polarity and ten discharges having a neg

8、ative polarity areapplied at each preselected point, andc) Radiated Fields in accordance with IEC 61000-4-3, test level 3 being applicable.7.3.1 If a blender has an exterior surface of glass or comparably brittle material, such as a capacitivetouch screen, which is part of the enclosure of live part

9、s, the material shall be capable of withstanding thestresses likely to be encountered in actual service. Such parts shall be subjected to the Impact Test inaccordance with 61.5.1.4.28.4.14 A blender with a capacitive touch screen shall be constructed to reduce the risk of unintentionaloperation of t

10、he blender. The touch screen shall be:UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULa) provided with a flashing light, warning marking of 69.25 and instructions as specified in73.32 when a single touch is needed to initiate operation of the

11、blender;b) recessed or guarded (See 28.4.15); orc) provided with a two-step operation as specified in 28.4.16.28.4.15 The touch screen is considered to be recessed or guarded to reduce the risk of unintentionaloperation if a cylindrical rod, having a diameter of 40 mm and a hemispherical end, applie

12、d to the touchscreen with the blender in any stand-by mode is unable to contact the touch screen in an area that wouldinitiate operation of the blender.28.4.16 A blender touch screen provided with a two-step operation to reduce the risk of accidentaloperation as specified in 28.4.14 shall require tw

13、o separate actuations to start operation of the blenderand be provided with:a) A plainly identified one-step OFF or STOP function (See also 26.12 and Exception No. 3 of6.5.2.2);b) An indicator light or other visual indicator to indicate when the touch screen is in a conditionwhere a single touch is

14、needed to initiate operation of the blender (after Step 1);c) A time-out function on the first step of no longer than 30 seconds; andd) Instructions as specified in 73.2.2.28.4.17 With respect to 28.4.16, after the operation of the blender is manually stopped, or afterautomatically stopping at the c

15、ompletion of a programmed sequence, the blender shall return to acondition requiring a two-step function to initiate operation.28.4.18 With respect to 28.4.17, for a blender with a momentary contact pulse operation, Step 1 mayremain active as long as the duration between the Pulse operations is no m

16、ore than 30 seconds.61.5.1.4 The impact test in accordance with 61.5.3 shall also be conducted on breakable exterior surfacesas specified in 7.3.1. The blender shall then be subjected to the Overflow Test of 38.1 unless the blenderis no longer functional or the surface withstands the impact test wit

17、hout cracking or breaking.69.25 Blender with capacitive touch screen and appliance with stand-by mode69.25.1 A blender with a capacitive touch screen and products employing accessible moving parts andelectronic controls with a stand-by mode, and required to be provided with a flashing light in accor

18、dancewith 28.4.14(a) or the Exception to 26.12:a) Flashing light indicates ready to operate. Avoid any contact with blades or moveable parts.b) The marking required by (a) shall be located next to the flashing light.73.2.2 For a blender with a capacitive touch screen with a two-step ON function as s

19、pecified in 28.4.16,replace 72.1(d) with the following:Unplug from outlet when not in use, before putting on or taking off parts and before cleaning.Flashing light (or identify other means used) indicates ready to operate. Avoid inadvertentcontact with the touch screen.STANDARD NUMBER: UL 982 -2-UL

20、COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL73.32 Blender with capacitive touch screen and appliances with stand-by mode73.32.1 A blender with a capacitive touch screen and appliances employing accessible moving parts andelectronic controls w

21、ith a stand-by mode, and required to be provided with a flashing light in accordancewith 28.4.14(a) or the Exception to 26.12:a) Replace 72.1(e) with the following:Flashing light indicates ready to operate. Avoid any contact with blades or moveableparts.RATIONALE FOR DECISION:A capacitive touch scre

22、en requires no force to activate, so unintentional (accidental) operation of theblender is a concern due to the risk of injury presented by the blender blades and, possibly, the drivecoupler. The 40 mm diameter probe is based on international requirements for unintentional operation ofcertain househ

23、old kitchen machines. The two-step ON function and 30 second timeout is based onexisting US appliance standards.In addition, the use of the touch screen introduces the use of breakable materials that may be acting apart of the enclosure. This surface shall be evaluated for mechanical strength by con

24、ducting the BallImpact Test. It is likely that a user will continue to use an appliance with a broken touch screen as longas the blender is still functional. Therefore, the Overflow Test is to be repeated if the Impact Test resultsin cracking or breaking of the touch screen surface.The capacitive to

25、uch screen user interface technology is more susceptible to electromagnetic interferencethan electromechanical switches or other electronic user interfaces. Therefore, the Electrostatic DischargeTest and Radiated Fields Test are conduct along with the component fault testing to evaluate the reliabil

26、ityof the two-step ON function.Copyright 2015 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness of Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certifi

27、cation Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thestandard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for t

28、he use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertifi

29、cation Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 982 -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSTANDARD NUMBER: UL 982 -4-No Text on This Page