ASTM_F_922_-_01_2011.pdf

Designation:F92201(Reapproved 2011)An American National StandardStandard Test Method forMotor Life Evaluation of an Electric Motorized Nozzle1This standard is issued under the fixed designation F922;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the motorized nozzle used withhousehold or commercial vacuum cleaner systems,that is,combination cleaners.1.2 This test method provides a test for determining oper-ating motor life in hours by an accelerated laboratory proce-dure.The motors are tested while mounted and operated in themotorized nozzle.1.3 This test method covers only the motorized nozzle.Thesystem used to provide the airflow source is not underconsideration.1.4 This test method is limited to the determination of motorlife for an electrically powered household or commercialmotorized nozzle.1.5 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D75 Practice for Sampling AggregatesE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)F431 Specification for Air Performance Measurement Ple-num Chamber for Vacuum CleanersF608 Test Method for Evaluation of Carpet Embedded DirtRemovalEffectivenessofHousehold/CommercialVacuum CleanersF655 Specification for Test Carpets and Pads for VacuumCleaner Testing3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 motor lifelimited by failure of the motor.Failure ismotor stoppage.3.1.1.1 DiscussionAny failure integral with the motorsuch as armature assembly,field assembly,housing(s)bearings,motor cooling fan,carbon brush assemblies,motor-mounted nonresettable thermal protective devices,or any othercomponent judged to be integral with the motor shall be judgedas motor stoppage.4.Significance and Use4.1 The test results provide an indication of the motor life ofan electric motorized nozzle.End of motor life will be judgedin accordance with Section 3.5.Apparatus and Materials5.1 Voltage Regulator System,to control the input voltage tothe vacuum cleaner.The regulator system shall be capable ofmaintaining rated voltage 61%and rated frequency 61 Hz ofthe motorized nozzle having a wave form that is essentiallysinusoidal with 3%maximum harmonic distortion for theduration of the test.5.2 Voltmeter,to provide measurements accurate to within61%.5.3 Timer and Switch,having the capacity to control theoff/on duty cycle of the nozzle and air flow source during thelife test.5.4 Wattmeter,to provide measurements accurate to within1%.5.5 Sharp-Edge Orifice Plate,a 114-in.(32-mm)diametershall be in accordance with the orifice plate illustrated inSpecification F431.5.6 Plenum Chamber,conforming to the plenum chamberspecifications in Specification F431.5.7 Water Manometer,or equivalent instrument measuringin increments of 0.1 in.(2.54 mm).1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.30 on Durability-Reliability.Current edition approved Nov.1,2011.Published March 2012.Originallyapproved in 1988.Last previous edition approved in 2006 as F922 01(2006).DOI:10.1520/F0922-01R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.8 Barometer,with an accuracy of 60.05 in.Hg(1.27 mmHg),capable of measuring uncorrected barometric pressurewith scale divisions of 0.02 in.(0.51 mm)or finer.5.9 Thermometer,having a range of at least 18 to 80F(8to+27C)and graduated in 1F(0.5C)increments.5.10 Psychrometer,meeting the requirements of TestMethod E337 with thermometers graduated in increments of1F(0.5C).5.11 Test Carpet,conforming to the level loop carpet asdescribed in Specification F655.A carpet that provides equiva-lent nozzle loading results may be used.5.12 Carpet Padding(optional),if used,the test carpetpadding will conform to the padding described in SpecificationF655.5.13 Test Cleaner or Airflow SourceThe motorized nozzlemotor life evaluation tests shall be conducted using the airflowsource and voltage resulting from the components whichcomprise the combination system with which the