ASTM_F_884_-_01_2011.pdf

Designation:F88401(Reapproved 2011)An American National StandardStandard Test Method forMotor Life Evaluation of a Built-In(Central Vacuum)VacuumCleaner1This standard is issued under the fixed designation F884;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 is limited to motor life evaluation ofcentral vacuum cleaners.1.2 This test method provides a test to determine operatinglife of the motor,before servicing is needed,by an acceleratedlaboratory procedure.The motor is tested while mounted and isoperated in central vacuum cleaner.1.3 The values as stated in inch-pound units are to beregarded as the standard.The values in parentheses are forinformation only.1.4 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:2E337 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 Cleaners3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failuremotor stoppage.3.1.2 motor lifelimited by the failure of the motor.Anyfailure integral with motor,such as armature assembly,fieldassembly,housing(s),bearings,motor cooling fan and primaryair moving fan,or both,brush assemblies,motormountednonresetable thermal protection devices,or any other compo-nent judged to be integral with the motor,shall be judged asmotor stoppage.4.Significance and Use4.1 The test results provide an indication of the motor life ofan electric vacuum cleaner.The end of the motor life will bejudged in accordance with Section 3.5.Apparatus and Materials5.1 Voltage Regulator Systemto control the input voltageto the vacuum cleaner.The regulator must be capable ofmaintaining the Central Vacuums rated voltage 61%andrated frequency 61 Hz with a waveform 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 SwitchThe timer and switch shall have thecapacity to control the off/on duty cycle of the cleaner duringthe life test.5.4 Sharp Edge Orifice PlateThe orifice,0.75 in.(19.05mm)in diameter,shall be in accordance with the figureillustrating orifice plate detail in Specification F431.5.5 Wattmeter,to provide measurements accurate to within1%.5.6 Plenum Chamber,in accordance with the plenum cham-ber described in Specification F431.5.7 Water Manometer,or equivalent instrument measuringin increments of 0.1 in.(2.54 mm).5.8 Barometer,with an accuracy to 60.05 in.(1.27 mm)Hg,capable of measuring uncorrected barometric pressure(teststation pressure)with scale division 0.02 in.(0.51 mm)or finer.5.9 Thermometer,having a range from 18 to 80F(8 to27C)and graduated in 1F(0.5C)increments.5.10 PsychrometerThe psychrometer shall meet the re-quirements of Test Method E337 with thermometers graduatedin increments of 1F(0.5C).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 1990.Last previous edition approved in 2006 as F884 01(2006).DOI:10.1520/F0884-01R11.2For 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 5.11 Test FixtureAny suitable surface that will support thevacuum cleaner in the normal operating position.6.Sampling6.1 Test a minimum of three units(or a larger sample size ifdesired)of similar models using the same motor style andamperage.Select all samples at random in accordance withgood statistical practice.Results shall provide an 80%confi-dence level within 610%of the mean value.If not,testadditional samples or reduce the results by the penalty factor ascalculated in 7.9.7.Procedures for Motor Life Evaluation7.1 Determine initial performance as follows:7.1.1 Connect the manometer(or equivalent)to the plenumchamber.Install a new filter bag in the test cleaner,if required,before conducting performance tests.7.1.2 With a minimum length of 2 in.inside diameter tubingsealed to the plenum chamber and to