1、Designation: F1038 02 (Reapproved 2011)An American National StandardStandard Test Method forMotor Life Evaluation of a Canister, Hand-held, Stick, andUtility Type Vacuum Cleaner Without a Driven Agitator1This standard is issued under the fixed designation F1038; the number immediately following the
2、designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method is limite
3、d to evaluation of canister,hand-held, stick, and utility type vacuum cleaners without adriven agitator.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
4、 a vacuum cleaner.1.3 The values as stated in inch-pound units are to beregarded as the standard. The values in parentheses are givenfor information 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 t
5、his 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
6、Specification for Air Performance Measurement Ple-num Chamber for Vacuum CleanersF608 Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/Commercial VacuumCleaners3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 failurewhen motor stoppage occurs
7、. This may bedue to failure of an armature assembly, field assembly, hous-ing(s), bearings, motor cooling fan and primary air moving fanor both, brush assemblies, motor mounted nonresetable thermalprotection devices or any other component judged to beintegral with the motor.3.1.2 motor lifethe time
8、at which any failure of the motoroccurs.4. Significance and Use4.1 The test results provide an indication of the motor life ofan electric vacuum cleaner in operating hours. The end of themotor life will be judged in accordance with Section 3.5. Apparatus and Materials5.1 Voltage Regulator System, to
9、 control the input voltage tothe vacuum cleaner. The regulator system shall be capable ofmaintaining the vacuum cleaners rated voltage 61 % andrated frequency 61 Hz having a waveform that is essentiallysinusoidal with 3 % maximum harmonic distortion for theduration of the test.5.2 Voltmeter, to prov
10、ide measurements accurate to 61%.5.3 Timer and SwitchThe timer and switch will have thecapacity to control on/off duty cycle of the vacuum cleanerduring the life test.5.4 Sharp Edge Orifice PlateThe orifice, 0.75 in. (19.05mm) in diameter, shall be in accordance with the figureillustrating orifice p
11、late detail in Specification F431.5.5 Wattmeter, to provide measurements accurate to 61%.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 Thermometer, having a rang
12、e of at least 18 to 80F (-8to +27C) and graduated in 1F (0.5C) increments.5.9 PsychrometerThe psychrometer shall meet the re-quirements of Test Method E337 with thermometers in incre-ments of 1F (0.5C).5.10 Test FixtureAny suitable surface that will supportthe vacuum cleaner in the normal operating
13、position.1This test method is under the jurisdiction of ASTM 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 1998. Last previous edition approved in 20
14、06 as F1038 02 (2006).DOI: 10.1520/F1038-02R11.2For 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.1Copyright AST
15、M International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 statisti
16、cal 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 7.8.1.7. Procedures for Motor Life Evaluation7.1 Determine initial performance as follows:7.1.1 Connect the manomet
17、er (or equivalent) to the plenumchamber. Install a clean filter in the test vacuum cleaner beforeconducting performance tests. (This is not required for unitswhich do not use filters).7.1.2 With the vacuum cleaner hose end (or nozzle) sealedto the plenum chamber and without an orifice plate in theho
18、lder, energize the vacuum cleaner at its nameplate ratedvoltage 61 % and frequency 61 Hz until the vacuum cleanerreaches its normal operating temperature. For vacuum cleanerswith dual nameplate voltage ratings, conduct testing at thehighest voltage.7.1.3 With the vacuum cleaner operating at a consta
19、nt ratedvoltage, insert the 0.75 in. (19.05 mm) diameter sharp-edgeorifice into the holder on the plenum chamber.7.1.4 Record the manometer reading as soon as the readingstabilizes.7.1.4.1 Take readings as soon as the manometer reaches atrue peak. (On higher manometer readings, the liquid level mayp
20、eak drop and peak a second time. The second peak is the truepeak reading. A person conducting the test for the first timeshall observe a least one run before recording data). SeeSpecification F431 for instructions on how to minimize theovershoot (first peak) of the liquid level.7.1.4.2 Take all read
21、ings within 10 s of the orifice plateinsertion.7.1.5 Record the wattage of the vacuum cleaner connectedto the plenum chamber. The wattage reading is used to monitorthe vacuum cleaner load.7.1.6 Monitor the wattage and the suction daily and measureon the plenum chamber every 168 h to ensure that a lo
22、ad ismaintained, that no mechanical problem has developed, andthat performance has not degraded by more than 40 %. Ifdegradation exceeds 40 %, see 7.7.1 and 7.7.27.2 Install the vacuum cleaner on the test fixture with a 0.75in. (19.05 mm) diameter sharp-edge orifice plate in the vacuumcleaner hose (
23、or nozzle) opening.7.2.1 If required, the unit may have an adapter which has thespecified orifice or provision to mount an orifice plate to thevacuum cleaner.7.3 If various settings are provided, set the motor speed,suction regulator, or a combination of these, in accordance withthe manufacturers sp
24、ecified settings for using the vacuumcleaner on the level loop test carpet. This setting shall be thesame as that used for Test Method F608.7.4 During the life test, change the disposable filter or cleanthe reusable filter every 168 h of test time. (This is not requiredfor units which do not use fil
25、ters). The manufacturers recom-mended cleaning procedure is to be used whenever specified ininstruction booklets. Where no procedure is specified, replacereusable filters. When a new or cleaned filter is placed in thevacuum cleaner, check the vacuum cleaner on the plenumchamber for degradation of pe
26、rformance in accordance with7.7.1 and 7.7.2.7.5 Perform all tests in a controlled ambient atmospherewith a dry bulb temperature of 68 to 81F (20 to 27C) andrelative humidity of 30 to 50 %.7.6 Test the vacuum cleaner at the voltage specified in 7.1.2from a remote on/off switch and timer with a duty c
27、ycle of 8min of operation followed by 2 min off.7.7 Check for degradation of performance every 168 h oftest time.7.7.1 Performance DegradationIn accordance with theprocedure in Annex A1, use the suction at the start of the test7.1.4 as the base for determining the 40 % degradation ofperformance.7.7.
28、2 If degradation is present, determine and correct thecause. Replace any part, except the motor or its integral parts,to bring system within performance limits and continue the testuntil the motor stops.7.8 Judge the end of the test in conformance with Section 3.Express life in terms of operating (o
29、n) hours only.7.8.1 Calculate the sample mean for units tested and theconfidence interval half-width:x 5(i 5 1nxin(1)h 5ts=n(2)where:xi= life, in hours of “on” time, for each sample tested,h = half-width of confidence interval,t = value from t distribution table for 80 % (t0.90) confi-dence level an
30、d degrees of freedom=n1(see Table1),s = standard deviation of sample,n = sample size, andx = mean of sample.7.8.2 Compare the sample mean and confidence intervalhalf-width to determine whether a penalty factor is required:TABLE 1 Percentiles of the t Distributiondf t0.901 3.0782 1.8863 1.6384 1.5335
31、 1.4766 1.4407 1.4158 1.3979 1.38310 1.37211 1.36312 1.35613 1.35014 1.34515 1.341F1038 02 (2011)2(1)Ifh , 0.1x, use x as the published value.(2)Ifh . 0.1x , test additional units to meet the confidencelevel or use the following penalty factor (D):D5h 0.1x (3)Use x D as published value.8. Precision
32、and Bias8.1 PrecisionA meaningful precision statement cannot bemade due to the number of components in the motor each ofwhich could constitute failure of the motor.8.2 Bias does not apply because there is no standardreference for comparison.9. Keywords9.1 canister; hand-held; motor life evaluation;
33、stick; vacuumcleaner; utilityANNEXES(Mandatory Information)A1. METHOD FOR DETERMINING 40 % DEGRADATION OF PERFORMANCEA1.1 One requirement for life test is to ensure thatperformance at the vacuum cleaner hose (or nozzle) has notdegraded by more than 40 % of original. This is to ensuresuction loading
34、on the motor. This degradation can be based ona reduction of initial suction, since there is a direct relationshipbetween suction and airflow. Determine the point at whichsteps must be taken to correct the performance loss based onsuction as follows.A1.2 Derivation:Q15 21.844D2K=h1(A1.1)Since D2and
35、K are constants, then Q1/Q25=h1/=h2and Q25 0.6Q1at the point when servicingmay be required. Therefore, Q1/0.6Q15=h1/=h2,orh2= 0.6Q1,orh2= 0.36h1at the servicing point.A1.3 Terms:Q1= initial airflow,Q2= airflow at servicing point,h1= initial suction,h2= suction at servicing point,D = orifice diameter
36、, andK = orifice flow coefficient.A2. CORRECTION OF DATA TO STANDARD CONDITIONSA2.1 Air Density RatioThe density ratio, Dr, is the ratioof the air density at the time of test, rtest, to the standard airdensity, rstd5 0.0750 lb/ft31.2014 kg/m3!. It is used tocorrect the vacuum and wattage readings to
37、 standard condi-tions. Find r (lb/ft3(kg/m3) from standard psychrometriccharts or ASHRAE tables and calculate Dras follows:Dr5rtestrstd(A2.1)As an alternative, use the following equation:Dr5 17.68Bt 0.001978Tw21 0.1064Tw1 0.0024575BtTd Tw! 2.741/Td1 459.7! (A2.2)where:Bt= test station pressure at ti
38、me of test (in. Hg),Td= dry-bulb temperature at time of test (F), andTw= wet-bulb temperature at time of test (F).NOTE A2.1This equation is intended for use in correcting for ambientconditions where the barometric pressure exceeds 27 in. Hg and the dry-and wet-bulb temperatures are less than 100F (3
39、7.8C).A2.2 Corrected SuctionCalculate the corrected suction,hS, as follows: h times the correction factor, CS,orhS5 CSh (A2.3)where:h = manometer reading, andCS= correction factor.A2.2.1 For series universal motors, calculate the correctionfactor, CS, as follows:CS5 1 1 0.6671Dr! (A2.4)F1038 02 (201
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43、ittee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F1038 02 (2011)4
