1、Designation: F1410 98 (Reapproved 2011)An American National StandardStandard Test Method forMeasuring Maximum Functional Wet Volume of UtilityVacuum Cleaners1This standard is issued under the fixed designation F1410; the number immediately following the designation indicates the year oforiginal adop
2、tion 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 applicable to any vacuum cleanerthat is classified a
3、s a utility vac.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are for informa-tion only.1.3 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 sta
4、ndard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Significance and Use2.1 This test method covers a procedure to determine themaximum functional wet volume that the utility vac is capableof collecting.3. Apparatus3.
5、1 Voltmeter, to measure input to the cleaner, providingmeasurements accurate to within 61%.3.2 Voltage Regulator SystemThe regulator shall be ca-pable of maintaining the rated voltage (61 %) and frequency(61 Hz) with sinusoidal wave form.3.3 Temperature and Relative Humidity Indicators, to pro-vide
6、temperature measurements accurate to within 61F (612C) and humidity measurements accurate to within 62%relative humidity.3.4 Weighing ScaleThe scale shall be accurate to 1 % offull scale and have a weighing capacity of at least 250 lb (113.4kg).4. Materials4.1 Water.5. Sampling5.1 Test a sample of e
7、ach basic model until a 90 %confidence level (about the mean) is established within 65%of the mean value. Test a minimum of three samples. Select allsamples at random in accordance with good statistical practice.NOTE 1SeeAppendix X1 for method of determining 90 % confidencelevel.6. Conditioning6.1 T
8、est RoomThe test room should be maintained at70 6 5F (21 6 3C) and 45 to 55 % relative humidity.7. Procedure7.1 Equip the vac with a new filter.7.2 Weigh the empty vac including the power supply cord.(Do not include the hose or any accessories.)7.3 Unit must be on a level surface and the shut-off de
9、vicemust be in place if the unit is designed to be used with one.7.4 Level of the water to be picked up shall be lower thanthe floor level of vac such that no siphoning occurs.7.5 Tests are to be conducted at the nameplate voltage(61 %) and frequency (61 Hz), when measured at theappliance plug. For
10、cleaners with dual nameplate voltageratings, conduct tests at the highest voltage.7.6 Using the largest hose supplied with the unit, vacuumwater into the vac-tank. Maintain a water pick up rate of 2gal/min throughout the filling cycle.7.7 Collect water with the vac until either one of thefollowing o
11、ccurs:7.7.1 The unit stops collecting water, or7.7.2 Water overflows from the vac.7.8 Stop unit and disconnect hose from the vac. Any waterremaining in the hose shall not be included in the maximumfunctional volume.7.9 Weigh the filled vac, including the power supply cord.7.10 Calculate the maximum
12、functional volume by dividingthe weight of the water collected by the weight per gallon ofwater as follows:volume, gal 5weight lb! vac filled 2 weight lb! vac empty8.328 lb/gal7.11 Record the maximum functional wet volume in gallons(litres) to the nearest tenth.7.12 Repeat steps 7.1 through 7.12 two
13、 more times. Theaverage of the three tests represents the maximum wet func-tional volume that the utility vac is capable of collecting.1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.23 on Filtration.Current edit
14、ion approved Nov. 1, 2011. Published March 2012. Originallyapproved in 1992. Last previous edition approved in 2006 as F1410 98 (2006).DOI: 10.1520/F1410-98R11.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Precision and Bias28.1
15、 PrecisionThese statements are based on an interlabo-ratory test involving six laboratories and four units. The rangeof maximum functional volume of the units was from 3.8 to13.5 gal.8.1.1 Repeatability (Single-Operator-Laboratory, Multi-day):8.1.1.1 Repeatability for wet volume values of 5 gal andu
16、nder, within a laboratory divided by the average (coefficientof variation) was found to be 4.5 % or less. Two values from asample of three should be considered suspect (at the 95 %confidence level) if they differ by more than 12.8 %.NOTE 2The percent difference = (larger smaller)/(larger) 3 100.8.1.
17、1.2 Repeatability for wet volume values of over 5 gal,the standard deviation within a laboratory divided by theaverage (coefficient of variation) was found to be 2.5 % or less.Two values from a sample of three should be consideredsuspect (at the 95 % confidence level) if they differ by morethan 7.1
18、%.NOTE 3The percent difference = (larger smaller)/(larger) 3 100.8.1.2 Reproducibility (Multilaboratory, Multiday):8.1.2.1 Reproducibility for wet volume values of 5 gal andunder, the standard deviation divided by the average (coeffi-cient of variation) with a single unit tested in differentlaborato
19、ries was found to be 10.7 % or less. Two such valuesshould be considered suspect (at the 95 % confidence level) ifthey differ by more than 33 %.8.1.2.2 Reproducibility for wet volume values over 5 gal,the standard deviation divided by the average (coefficient ofvariation) with a single unit tested i
20、n different laboratories wasfound to be 3.2 % or less. Two such values should beconsidered suspect (at the 95 % confidence level) if they differby more than 11.5 %.8.2 BiasNo justifiable statement can be made on the biasof this test method for the properties listed. The true values ofthe properties
21、cannot be established by acceptable refereemethods.9. Keywords9.1 utility vacuum cleaner; wet volumeAPPENDIX(Nonmandatory Information)X1. DETERMINATION OF 90 % CONFIDENCE INTERVALX1.1 The most common and ordinarily the best singleestimate of the population mean is simply the arithmeticmean of the me
22、asurements. When a sample is taken from apopulation, the sample average will seldom be exactly thesame as the population average; however, it is hoped to befairly close so that the statement of confidence interval willbracket the true mean.X1.2 The following procedure gives an interval which isexpec
23、ted to bracket , the true mean, 100(1 a) % of the time.This provides a 100(1 a) % confidence level. a is the chanceof being wrong, therefore, 1 a is the probability of beingcorrect.X1.2.1 Choose the desired confidence level, 1 a.X1.2.2 Compute Mean ( X ):X 51n(i 5 1nXiStandard Deviation, s 5n S Xi22
24、SXi!2n n 2 1!where:n = number of units.X1.2.3 Compute the upper limit (X) and the lower limit(XL):X5 X 1 ts/=nXL5 X 2 ts/nwhere:t = value from Table X1.1 at (1 a)/2.X1.3 The interval from XLto Xis a 100(1 a)%confidence interval for the population mean; that is, we mayassert with 100(1 a) % confidenc
25、e that XLA, select another unit for testwhich increases the sample size, and perform X1.4.2 throughX1.4.6 with the larger sample.X1.4.8 Step 8If ts/=n A, select another unit for testwhich increases the sample size, and perform Steps 2 through6 with the larger sample.X1.5.8 Step 2Obtain unit scores.U
26、nit No. 4:Test Score ExplanationRun 1 5.3 maximum spread 5.4 5.2 = 0.2Run 2 5.4 % = maximum spread/maximum score = 0.2/5.4= 3.7 %Run 3 5.2 less than the 6 % repeatabilityAvg. 5.3Therefore, the average of these three runs is the unit score.X1.5.9 Step 3Compute mean ( X ) and standard devia-tion(s) fo
27、r the samples.Unit No. 1 5.0Unit No. 2 5.2Unit No. 3 5.5Unit No. 4 5.3Total = 21.0Number of Units=4=nMean = X = 21.0/4 = 5.25Standard Deviation,s 545.021 5.221 5.521 5.32!#2 5.0 1 5.2 1 5.5 1 5.3!#244 2 1!#5 0.208X1.5.10 Step 4Compute A; A =5%ofX = 0.05 3 5.25= 0.263.X1.5.11 Step 5Find t value. For
28、90 % confidence, a =10 %; therefore, (1 a)/2 = 0.95. t0.95for n 1 (4units1=3)=2.353.X1.5.12 Step 6Determine the quantity (t 3 s)/=n andcompare to A.t 3 s=n52.353 3 0.208=40.245 . 0.263Therefore proceed to Step 8.NOTE X1.2With sufficient units, (t 3 s)/ =n will become less thanA; and Step 7 is follow
29、ed (X1.5.7) until this occurs.X1.5.13 Step 8If ts/=n A, a desired 90 % confidenceinterval has been obtained. The final X can be used as anestimate of the population mean. X from Step 3(X1.5.9) = 5.25; therefore, 5.25 is an acceptable estimate of themean maximum functional volume for the model line s
30、ampledand tested according to this procedure.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, an
31、d the riskof infringement of such rights, are entirely their 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 revisi
32、on of this standard or for additional standardsand should be 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 sh
33、ouldmake your views known to the ASTM Committee 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/).F1410 98 (2011)4
