1、Designation: F 1038 02 (Reapproved 2006)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 F 1038; the number immediately following th
2、e 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method is lim
3、ited 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
4、 in 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 o
5、f 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:2E 337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and Dry-Bulb Tem-peratures)F
6、 431 Specification for Air Performance Measurement Ple-num Chamber for Vacuum CleanersF 608 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
7、occurs. 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
8、 time 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 Syst
9、em, to 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, t
10、o provide 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 ori
11、fice plate detail in Specification F 431.5.5 Wattmeter, to provide measurements accurate to 61%.5.6 Plenum Chamber, in accordance with the plenum cham-ber described in Specification F 431.5.7 Water Manometer, or equivalent instrument measuringin increments of 0.1 in. (2.54 mm).5.8 Thermometer, havin
12、g a range 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 E 337 with thermometers in incre-ments of 1F (0.5C).5.10 Test FixtureAny suitable surface that will supportthe vacuum cleaner in the normal o
13、perating 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 July 1, 2006. Published July 2006. Originally approvedin 1998. Last previous edition approv
14、ed in 2002 as F 1038 02e1.2For 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 ASTM International, 100
15、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 statistical practice. Results
16、 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 manometer (or equivalent) to
17、 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 theholder, energize the va
18、cuum 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 constant ratedvoltage, inse
19、rt 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 maypeak drop and peak a s
20、econd 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 F 431 for instructions on how to minimize theovershoot (first peak) of the liquid level.7.1.4.2 Take all readings within 10 s of
21、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 load ismaintained, tha
22、t 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 (or nozzle) opening.7
23、.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 specified settings for
24、 using the vacuumcleaner on the level loop test carpet. This setting shall be thesame as that used for Test Method F 608.7.4 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 filters). The manufact
25、urers 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 performance in accord
26、ance 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 cycle of 8min of ope
27、ration 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.7.7.2 If degradation is
28、 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 (on) hours only.7.8.1
29、 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 and degrees of freedo
30、m=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 1.4766 1.4407 1.41
31、58 1.3979 1.38310 1.37211 1.36312 1.35613 1.35014 1.34515 1.341F 1038 02 (2006)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 and Bias8.1 Precis
32、ionA 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; stick; vacuumclean
33、er; 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 on the motor. This
34、 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 K are constants, t
35、hen 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, andK = orifice f
36、low 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 standard condi-ti
37、ons. 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 time of test (in. Hg
38、),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 (37.8C).A2.2 Correct
39、ed 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)F 1038 02 (2006)3ASTM Internati
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41、r own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should b
42、e addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standard
43、s, 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).F 1038 02 (2006)4
