1、Designation: F 1692 01 (Reapproved 2006)An American National StandardStandard Test Method forLife Evaluation of a Turbine-Powered Nozzle for HouseholdCentral Vacuum Cleaning Systems1This standard is issued under the fixed designation F 1692; the number immediately following the designation indicates
2、 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 covers the turbine-powered no
3、zzleused in household central vacuum cleaning systems.1.2 This test method provides a test for determining theoperating turbine life in hours by an accelerated laboratoryprocedure. The turbine is tested while mounted and operated inthe power nozzle.1.3 This test method covers only the turbine-powere
4、dnozzle. The system used to provide the airflow source is notunder consideration.1.4 This test method is limited to the determination ofturbine life for a household turbine-powered nozzle.1.5 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are
5、 forinformation only.1.6 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 t
6、o use.2. Referenced Documents2.1 ASTM Standards:2D75 Practice for Sampling AggregatesE 337 Test Method for Measuring Humidity with a Psy-chrometer (the Measurement of Wet- and Dry-Bulb Tem-peratures)F 431 Specification for Air Performance Measurement Ple-num Chamber for Vacuum CleanersF 608 Test Met
7、hod for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/Commercial VacuumCleanersF 655 Specification for Test Carpets and Pads for VacuumCleaner Testing3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 turbine stoppagefor turbine-powered nozzles, anyfailure
8、integral with the turbine assembly such as housing(s),bearings, or any other component judged to be integral with theturbine.4. Significance and Use4.1 The test results provide an indication of the turbine-powered nozzle life. The end of turbine life will be judged inaccordance with 3.1.1.5. Apparat
9、us and Materials5.1 Voltage Regulator Systemto control the input voltageto the vacuum cleaner or airflow source. The regulator must becapable of maintaining the vacuum cleaner or the airflowsources rated voltage 61 % and rated frequency 61 Hz witha waveform that is essentially sinusoidal with 3 % ma
10、ximumharmonic distortion for the duration of the test.5.2 Voltmeter, to provide measurements accurate to within61%.5.3 Timer and Switch, having the capacity to control theoff/on duty cycle of the nozzle and airflow source during thelife test.5.4 Wattmeter, to provide measurements accurate to within6
11、1%.5.5 Sharp-Edge Orifice PlateThe orifice, 114-in. (32-mm)diameter, shall be in accordance with the orifice plate illus-trated in Specification F 431.5.6 Plenum Chamber, conforming to the plenum chamberspecifications stated in Specification F 431.5.7 Water Manometer, or equivalent instrument, measu
12、ringin increments of 0.1 in. (2.54 mm).5.8 Barometer, with an accuracy of 60.05 in. (1.27 mm)Hg, capable of measuring uncorrected barometric pressure (teststation pressure) with scale divisions of 0.02 in. (0.51 mm) orfiner.5.9 Thermometer, having a range from at least 18 to 80F(8 to +27C) and gradu
13、ated in 1F (0.5C) increments.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 Jan. 1, 2006. Published January 2006. Originallyapproved in 1996. Last previous e
14、dition approved in 2001 as F 1692 01.2For 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 Internat
15、ional, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.10 Psychrometer, meeting the requirements of TestMethod E 337, with thermometers graduated in increments of1F (0.5C).5.11 Test Carpet, conforming to the specifications for levelloop carpet as described in Sp
16、ecification F 655. A carpet thatprovides equivalent nozzle loading results may be used.5.12 Test Carpet Padding, conforming to the padding de-scribed in Specification F 655.5.13 Test Cleaner or Airflow SourceThe turbine nozzlelife evaluation tests shall be conducted using the airflow sourceand volta
17、ge resulting from the components that compose thecombination system with which the turbine nozzle is to beused. If used with several systems, the one with the maximumairflow shall be used.5.13.1 OptionA simulated airflow source and adjustedvoltage may be used if they are equal to or exceed the centr
18、alvacuum cleaning system with which the turbine nozzle is to beused.5.14 Test FixtureA moving surface, covered by the testcarpet supported on the test pad, which moves with a horizon-tal reciprocating motion, for a stroke distance of 27 in. (686mm) in each direction at the average rate of 1.8 ft/s (
19、0.55 m/s),resulting in 24 cpm (forward and back). This motion shall begenerated by rotating a 13.5-in. (343-mm) radius arm that shallbe connected to the platform with a suitable link (see Fig. 1).This device shall provide means to hold the turbine nozzlefixed securely by its handle in the operating
20、position while it isin contact with the reciprocating surface. The turbine nozzleshall be restrained suitably in the horizontal operating plane yetallowed freedom of movement in the vertical plane foroperation.5.14.1 OptionThe turbine nozzle can be subjected to thesame cycle as stated in 5.14 while
21、the carpeted platform is heldstationary (see Fig. 1).5.14.2 For either option, the reciprocating motion shallfollow the same duty cycle as specified for the vacuum cleaneror airflow source and turbine nozzle in 7.7.5.14.3 The turbine nozzles airflow source shall be station-ary and positioned so that
22、 the hose will be submitted tominimum stress.5.15 Test Dirt, Wedron sand/talc mixture. See Annex A1.6. Sampling6.1 Test a minimum of three units (or a larger sample size,if desired) of similar models using the same motor style andamperage. Select all samples at random in accordance withgood statisti
23、cal practice. Results shall provide an 80 % confi-dence level with 610 % of the mean value. If not, testadditional samples or reduce the results of the penalty factor ascalculated in 7.12.7. Procedure for Turbine Life Evaluation7.1 Determine the initial performance. The suction of thecleaner or airf
24、low source, with the turbine nozzle attached, is tobe determined and will be used to ensure that no leaks developto reduce the load on the nozzle during the test. For this initialtest, the nozzle opening is to be sealed to the ASTM plenumchamber with the manometer (or equivalent) connected to theple
25、num chamber. The turbine nozzle is to have the agitatordrive connected and a new filter bag in the cleaner or airflowsource. The agitator shall be operating freely, with the handlein operating position, as shown in Fig. 1.7.1.1 With the turbine nozzle opening sealed to the plenumchamber and without
26、an orifice plate in the holder, energize thecleaner or airflow source at its rated voltage 6 1 % and ratedfrequency 61 Hz for 5 min. For vacuum cleaners with dualnameplate voltage ratings, conduct the testing at the highestvoltage. See 5.13 if an optional airflow source is used.7.1.2 With the airflo
27、w source operating at the regulatedvoltages stated in 7.1.1, insert the sharp-edge orifice plate inthe holder on the orifice box, in accordance with 5.5 and 5.6.7.1.3 Record the manometer reading of the combined tur-bine nozzle and airflow source as soon as the reading isstabilized. This manometer r
28、eading is to be used as the baselineto monitor the degradation in performance during the test.7.1.4 Record the wattage of the airflow source while con-nected to the turbine nozzle and mounted on the plenumchamber. This wattage reading is to be used as the baseline tomonitor the nozzle load during th
29、e test.7.1.5 Repeat the initial test sequence described in 7.1-7.1.4,recording the manometer and wattage readings of only thecleaner or airflow source connected to the plenum chamber.7.1.6 The airflow and wattage reading shall be measuredevery 168 h to determine whether some component has failedFIG.
30、 1 Test FixtureF 1692 01 (2006)2and degraded the performance, reducing the load on the nozzleduring the life test. See 7.10 if degradation exceeds 40 %.7.1.7 Monitor the suction at the turbine nozzle daily duringthe test, in addition to the weekly measurement on the plenumchamber, to maintain loadin
31、g and to ensure that no mechanicalproblems exist.7.2 Use a new section of carpet and padding, in accordancewith 5.11 and 5.12, without holes, tears, or other signs of wear,when the test is started. Secure the carpet tautly. The lay of thecarpet pile shall be such that, during the forward stroke, the
32、turbine nozzle moves in the direction of the lay of the carpetpile (see Fig. 1). Measure the carpet pile height to determinethe carpet wear in accordance with 7.5.1.7.3 Install the turbine nozzle on the test fixture, as shown inFig. 1, with the nozzle connected to the airflow source using ahose as p
33、rovided with the unit. If more than one type of hosecan be provided, the hose with the least resistance to airflow(smallest pressure drop) shall be used.7.4 If various settings are provided, set the turbine nozzlespeed, suction regulator, nozzle height, or a combination ofthese, in accordance with t
34、he manufacturers specified settingfor using the nozzle on the level loop test carpet and pad. Thesetting shall be the same as that used for the cleanabilityembedded dirt carpet test in Test Method F 608.7.5 Keep the load within limits by controlling changes in thecarpet, agitator brush, drive belt,
35、and airflow source, or byreplacing components as determined in 7.5.1-7.5.4.7.5.1 Replace the carpet when one fourth of the pile heightis worn away, as measured in the center one third of the stroke,except at the beginning and end of the stroke path.7.5.2 During the life test, change the agitator bru
36、sh every168 h of cycling time.7.5.3 Change the drive belts every 168 h of cycling time orif they cease to drive the agitator on the test carpet prior to 168h. Replace the positive drive belts if they cease to function asintended.7.5.4 During the life test, change the disposable filter, orclean the r
37、eusable, primary and secondary filter every 168 h ofcycling time or when the airflow decreases 40 % due to filterclogging. To determine whether the filters must be changed orcleaned prior to the 168-h period, an initial dust clogging testshall be conducted in accordance with the procedure describedi
38、n Annex A2.7.6 Perform all tests in an ambient atmosphere, having a drybulb temperature of 68 to 81F (20 to 27C) and with a relativehumidity of 30 to 50 %.7.7 Operate the central vacuum cleaning system airflowsource (see 5.13) at the regulated and required voltage to obtainthe desired airflow throug
39、h the turbine nozzle. Operate thevacuum cleaner or airflow source from a remote on/off switchthat will control the test units to a duty cycle of 8 min ofoperation followed by 2 min off, following the cyclic criteria in5.14.7.8 Initially and daily monitor the suction and wattage inputat the airflow s
40、ource on the test fixture to provide a baseline foridentifying whether degradation has occurred. The unit canthen be removed and tested on the plenum chamber todetermine whether it exceeds the degradation limitation inaccordance with 7.10.1.7.9 Spread 10 g of the standard test dirt mixture on the te
41、stcarpet (Annex A1) at the start of the test and once every 24 hof cycling time. Spread evenly over the area traversed by thenozzle opening.7.10 Measure the airflow and wattage readings every 168 hduring the test in accordance with the instructions in 7.1-7.1.5to determine whether some component has
42、 failed or degraded,or both, in performance, thereby reducing the load on thenozzle or indicating failure.7.10.1 Performance DegradationIn accordance with theprocedure described inAnnexA2, the suction at the start of thetest, as determined in 7.1.3, is to be used as the base fordetermining the 40 %
43、degradation of performance. If degrada-tion is in the airflow source, replace or repair the airflow sourceand continue testing. If degradation is in the turbine nozzle,determine and correct the cause. Replace or repair any part,except the turbine in the turbine nozzle, to bring the systemwithin perf
44、ormance limits and continue the test.7.11 Judge the end of the test in conformance with 3.1.1.Express life in terms of the “on” time only.8. Calculation8.1 Calculate an estimate of the population mean in accor-dance with the following procedure:8.1.1 Calculate the sample mean for the units tested an
45、d theconfidence interval half-width:x 51n(i 5 1nxi(1)h 5ts=n(2)where:x = mean of sample,n = sample size,xi= life, in hours of “on” time, for each sample tested,h = half-width of confidence interval,t = value from a t distribution table for 80 % (t0.90)confidence level and degrees of freedom = n 1 (s
46、eeTable 1), and,s = standard deviation of sample.8.1.2 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 1.4158 1.3979 1.38310 1.37211 1.36312 1.3561
47、3 1.35014 1.34515 1.341F 1692 01 (2006)38.1.2.1 If h # 0.1 x, use x as the published value.8.1.2.2 If h 0.1 x, test additional units to meet theconfidence level or use the following penalty factor (D):D5h 2 0.1 x (3)Use x D as the published value.9. Precision and Bias9.1 PrecisionAmeaningful stateme
48、nt cannot be made dueto the number of components in the turbine nozzle, each ofwhich could constitute failure of the motor.9.2 BiasA bias statement cannot be applied to this testmethod as there is no standard reference for comparison.10. Keywords10.1 durability; turbine-powered nozzle; vacuum cleane
49、rANNEXES(Mandatory Information)A1. DIRT MIXTUREA1.1 Test DirtA1.1.1 Ten grams of the test dirt consists of the following:90 % (weight) 9 g of silica sand310 % (weight) 1 g of unscented commercial-grade talcum4A1.2 Analysis of Silica SandSieve Range, U.S. No. Particle Size, m Amount Used, g30/+40 600425 0.940/+50 425300 31.550+70 300212 41.470/+100 212150 13.5100/+140 150106 2.7A1.3 Analysis of Unscented Commercial-Grade Talcum%m0.5 4412.5 20 to 43.927 10 to 19.923 5to9.920 2to4.98 1 to 1.99 0.36h1, the test requirement for airflow/sucti
