1、Designation: F888 06 (Reapproved 2011) An American National StandardStandard Test Method forMeasuring Maximum Function Volume of the Primary DirtReceptacle in a Vacuum Cleaner1This standard is issued under the fixed designation F888; the number immediately following the designation indicates the yea
2、r 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 household types of upright,canister
3、, and combination vacuum cleaners.1.2 This test method provides a measurement in dry quartsor litres of the maximum functional volume of the primary dirtreceptacle when installed in the vacuum cleaner.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with it
4、s 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. For specific hazardsstatements see 7.2 and 8.5.2. Referenced Documents2.1 SAE Standard:2SAE J726b Air Cleaner Tes
5、t Code3. Significance and Use3.1 This test method covers a procedure to determine themaximum functional volume of the primary dirt receptaclewhen installed in the vacuum cleaner.3.2 This test method provides the maximum amount of testmedia that the primary dirt receptacle will hold and may bemore th
6、an the volume obtained when filled to the manufactur-ers recommended fill line.4. Apparatus4.1 Voltmeter, to measure input voltage to the cleaner, toprovide measurements accurate to within 61%.4.2 Voltage Regulator System, to control the input voltage tothe vacuum cleaner. The regulator system shall
7、 be capable ofmaintaining the vacuum cleaners rated voltage of 61 % andrated frequency 61 Hz having a wave form that is essentiallysinusoidal with 3 % maximum harmonic distortion for theduration of the test.4.3 Temperature Measuring Equipment, to provide mea-surements accurate to within 61F (0.5C).4
8、.4 Humidity Measuring Equipment, to provide measure-ments accurate to within 62 % relative humidity.4.5 Adapter, to be attached to the cleaning nozzle of uprightcleaners for use in directing granulated cork into the nozzle.See Fig. 1.4.6 Volume Measuring Container, to measure volume ofgranulated cor
9、k. This shall have a capacity of one dry quart.See Fig. 2. The container shall be made of transparent materialto ensure no voids when filled with granulated cork. As anoption, a 1-L container can be used.4.7 Weighing Scale The scale shall be accurate to 0.035 oz(1 g) and have a weighing capacity of
10、at least 15 lb (6.82 kg).5. Materials5.1 New Granulated CorkPremium Grade 2 mm to 4 mmsize.35.2 Coarse-Grade Air Cleaner Test Dust, see Table 1.Asanoption, talc may be used. See Table 2.6. Sampling6.1 Determination of Sample SizeA sample of sufficientsize of each model shall be tested until a 90 % c
11、onfidence levelis established within 65 % of the mean value. A minimum ofthree samples shall be tested. All samples shall be selected atrandom in accordance with good statistical practices.6.2 Determination of Maximum Functional Volume for EachUnitThe maximum functional volume for each unit shall be
12、an average of three runs with a spread meeting the repeatabilitystatement in 9.2. (See Appendix X1 for example.)1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.23 on Filtration.Current edition approved Nov. 1, 20
13、11. Published March 2012. Originallyapproved in 2004. Last previous edition approved in 2006 as F888 06. DOI:10.1520/F0888-06R11.2Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001.3The sole source of supply of the test material known to the committe
14、e at thistime is Jelinek Cork Corp., 4500Witmer Industrial Estates, PMB 167, Niagara Falls,NY 143051386. If you are aware of alternative suppliers, please provide thisinformation to ASTM International Headquarters. Your comments will receivecareful consideration at a meeting of the responsible techn
15、ical committee,1whichyou may attend.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. Conditioning7.1 Maintain the test room at 70 6 5F (216 3C) and 45to 55 % relative humidity.7.2 Expose all components involved in the test to thecon
16、trolled environment for at least 16 h prior to the start of thetest. (WarningStore sufficient 100 qt or 100-L increments ofgranulated cork in such a manner that when used they are in astate of constant mass/unit volume. )FIG. 1 Adapter Plate for UprightsFIG. 2 Volume Measuring ContainerTABLE 1 Analy
17、sis of Coarse Grade Air Cleaner F11 Test DustAParticle Size Distribution by VolumeSize, m Coarse Grade (% less than)5.5 13311 24322 37 344 56 388 84 3176 100AThe information in Table 1 is contained in “Air Cleaner Test Code,” SAE TechnicalReport J726b.TABLE 2 Analysis of Unscented Commercial Grade T
18、alcumParticle Size Distributionby Weight, %0.5 % 4412.5 % 2043.927.0 % 1019.923.0 % 59.920.0 % 24.98.0 % 11.99.0 % 0.9F888 06 (2011)28. Procedure8.1 Establish density of granulated cork in grams per dryquarts or grams per litres as follows:8.1.1 Weigh the empty container.8.1.2 Withdraw 100 qt or 100
19、 L from the bulk quantity.8.1.3 From the quantity withdrawn in 8.1.2, fill the con-tainer with granulated cork by gently pouring the granulatedcork through the funnel shown in Fig. 3.4Move the funnelaround in a horizontal plane to ensure even filling of thecontainer. Do not shake or disturb the cont
20、ainer during thisoperation. Introduce the granulated cork at a uniform rate of 1qt/min or 1 L/min 610 s.8.1.4 Weigh the filled container.8.1.5 Subtract the results of 8.1.1 from the results of 8.1.4for the weight of 1 qt or 1 L of granulated cork.8.1.6 Set the measured quantity of granulated cork as
21、ide.8.1.7 Repeat 8.1.3 8.1.6 ten times. Calculate the meanweight.8.1.8 Return the 10-qt or 10-L samples to the withdrawnquantity of 8.1.2.8.1.9 If testing is completed in the same day by the sametechnician, use the mean result of 8.1.7 in subsequent calcula-tions until the quantity withdrawn is depl
22、eted. Otherwise,recalculate the 10-qt mean.8.1.10 When quantity withdrawn is depleted, select another100-qt or 100-L sample in accordance with 8.1.2 8.1.9.8.2 Prepare the test cleaner as follows:8.2.1 Install new or clean primary and secondary filters.8.2.2 Prepare the primary dirt receptacle prior
23、to conductingthe measurement test run.8.2.2.1 For cleaners using disposable primary filters, use anew manufacturers recommended bag, weigh the filter bag tothe nearest 0.035 oz (1.0 g) and install in accordance with themanufacturers recommended procedure. Repeat this processfor each test. Preform th
24、e filter bag prior to installation toensure full installation.8.2.2.2 For cleaners using cloth filter bags or other types ofnondisposable dirt receptacles, empty them in accordance withthe manufacturers instructions after each test run, and cleanthe receptacle until its weight is within 0.14 oz (4 g
25、) of theprevious weight.8.3 Energize the vacuum cleaner for 5 min at its ratedvoltage 61 % and rated frequency 61 Hz. For vacuumcleaners with dual nameplate voltage ratings, conduct thetesting at the highest voltage.8.3.1 Place an upright cleaner so that the moving bristlesclear the supporting surfa
26、ce and no loose dirt is picked up.8.3.2 For a straight air canister or combination cleaner,operate with hose only, unrestricted and positioned such that noloose dirt is picked up.8.4 If the test vacuum cleaner contains a disposable orreusable primary inflatable filter bag, precondition the primaryfi
27、lter bag as follows:8.4.1 Measure and calculate the total primary filtering areaexcluding seams, joints, treated seal area, mounting means, andmultiple thickness of media. Measure multiple thicknesses thatare intended for a specific filtering purpose as a single ply.Open, measure, and take a mean me
28、asurement from three bagsfrom the same sample as the bags to be tested.8.4.2 Prepare 0.0023 oz of test dust per square inch ofprimary filter area (0.010 g/cm2) (see Table 1 and Table 2).Feed the test dust at the rate of 0.7 6 0.07 oz/min (20 6 2g/min) into the intake port to inflate the bag.8.4.3 If
29、 the test vacuum cleaner does not contain a dispos-able or reusable primary inflatable filter bag, the primary filterdoes not need to be preconditioned as in 8.4.1 and 8.4.2.4A1012-in. diameter utility funnel, Stock No. 78026, has been found suitable forthis purpose. The sole source of supply of the
30、 apparatus known to the committee atthis time is U.S. Plastic Corp., 1390 Newbrecht Rd., Lima, OH 45801. If you areaware of alternative suppliers, please provide this information to ASTM Interna-tional Headquarters. Your comments will receive careful consideration at a meetingof the responsible tech
31、nical committee,1which you may attend.FIG. 3 Filling Container for Average WeightF888 06 (2011)38.5 Testing has shown that the test media, granulated cork,can be reused a maximum of ten times without affecting themaximum functional volume measurement. (WarningIfgranulated cork is reused, the density
32、 in grams per dry quartsor grams per litres must be reestablished (see 8.1 8.1.10).)8.6 Introduce the granulated cork at a uniform rate of 1qt/min or 1 L/min 610 s into the vacuum cleaner in accordancewith 8.6.1, 8.6.2,or8.6.3.8.6.1 For an upright cleaner, without attached hose orattachment port, fe
33、ed the granulated cork through the adapteron the nozzle. Use only adapter shown in Fig. 1 or equivalent.The handle of the upright cleaner should be placed in theposition specified in the instruction book for above-the-floorcleaning.8.6.2 For an upright cleaner with attached hose or attach-ment port,
34、 feed the granulated cork through hose attached orthe hose provided for the attachment port. The handle of theupright cleaner should be placed in the position specified in theinstruction book for above-the-floor cleaning.8.6.3 For canister and combination cleaners, feed the granu-lated cork through
35、the hose accompanying the model beingtested. The hose and cleaner must be placed in such a mannerthat their position will allow a uniform pickup from thecontainer (see Fig. 4).8.7 De-energize the cleaner after it will accept no moregranulated cork.8.7.1 For bagless or hard dirt receptacle cleaners,
36、de-energize the cleaner after the granulated cork reaches thereceptacle “full line.” If the receptacle has no “full line,”continue the test until the cleaner will accept no more granu-lated cork. Do not include any granulated cork remainingoutside the dirt receptacle in the maximum functional volume
37、measurement.8.8 Carefully remove the primary dirt receptacle containingthe collected granulated cork. Do not include any granulatedcork remaining outside the primary dirt receptacle system,including the delivery tube, in the maximum functional volumemeasurement.8.9 Weigh the primary dirt receptacle
38、and collected granu-lated cork.8.10 Calculate the weight of granulated cork collected in theprimary dirt receptacle by subtracting the dirt receptacle andtest dust weight (if added) as described in 8.2.2 and 8.4.2 fromthe full dirt receptacle weight (see 8.9). Calculate the maxi-mum functional volum
39、e by dividing the total weight ofcollected granulated cork by the average weight of granulatedcork per quart or litre in accordance with 8.1.FIG. 4 Test Set-upF888 06 (2011)48.11 Record the maximum functional volume in dry quartsor litres to the nearest tenth.8.12 The maximum functional volume for a
40、 single test is thenumber of quarts or litres of granulated cork collected by theprimary dirt receptacle. The maximum functional volume of agiven vacuum cleaner is the mean value of three tests meetingthe repeatability statements specified in 9.2. (See Appendix X1for example.)9. Precision and Bias9.
41、1 PrecisionFor bagged vacuums, these statements arebased on an interlaboratory test involving twelve laboratoriesand four units. The range of maximum functional volume ofthe units was from 0.90 to 9.4 dry quarts.5For bagless uprightvacuums only, these statements are based on an interlaboratorytest i
42、nvolving twelve laboratories and four units. The range ofmaximum functional volume of the units was from 1.12 to 2.23dry quarts.5,6No data is currently available to make statementsconcerning the precision of other types of bagless vacuums.9.2 Repeatability (single-operator-laboratory)The ex-pected s
43、tandard deviation of repeatability of the measuredresults within a laboratory, Sr, has been found to be therespective values listed in Table 3.9.2.1 The 95 % repeatability limit within a laboratory, r, hasbeen found to be the respective values listed in Table 1, wherer = 2.8(Sr).9.2.2 With 95 % conf
44、idence, it can be stated that within alaboratory, a set of measured results derived from testing a unitshould be considered suspect if the difference between any twoof the three values is greater than the respective values of therepeatability limit, r, listed in Table 3.9.3 Reproducibility (multi-la
45、boratory)The expected stan-dard deviation of reproducibility of the average of a set ofmeasured results between multiple laboratories, SR, has beenfound to be the respective values listed in Table 3.9.3.1 The 95 % reproducibility limit within a laboratory, R,has been found to be the respective value
46、s listed in Table 3,where R = 2.8(SR).9.3.2 With 95 % confidence, it can be stated that the averageof the measured results from a set of three test runs performedin one laboratory, as compared to a second laboratory, shouldbe considered suspect if the difference between those twovalues is greater th
47、an the respective values of the reproducibil-ity limit, R, listed in Table 3.9.3.3 If the absolute value of the difference between theaverage of the measured results from the two laboratories is notequal to or less than the respective reproducibility limit listedin Table 3, the set of results from b
48、oth laboratories shall beconsidered suspect.9.4 BiasNo justifiable statement can be made on the biasof this test method. The true values of the properties cannot beestablished by acceptable referee methods.10. Keywords10.1 filtration; maximum functional volume; vacuumcleanerAPPENDIX(Nonmandatory Inf
49、ormation)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 measurements. 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 isexpected to bracket , the true mean, 100(1 ) % of the time.This p
