1、Designation: F820 16F820 17 An American National StandardStandard Test Method forMeasuring Air Performance Characteristics of CentralVacuum Cleaning Systems1This standard is issued under the fixed designation F820; the number immediately following the designation indicates the year of originaladopti
2、on 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 procedures for determining air performance characteris
3、tics of household central vacuum cleaningsystems, which use a flexible cleaning hose assembly and incorporates a series universal motor(s). This test method does not applyto the carpet cleaning mode of operation where dirt or debris is involved.1.2 These tests and calculations include determination
4、of suction, airflow, air power, maximum air power, and input power understandard operating conditions (see Note 1).NOTE 1For more information on air performance characteristics, see Refs (1-6).21.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parenthe
5、ses are provided forinformation only.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theappl
6、icability of regulatory limitations prior to use. A specific precautionary statement is given in Note 4.1.5 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of Internatio
7、nal Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3E1 Specification for ASTM Liquid-in-Glass ThermometersE177 Practice for Use of the Terms Precision and Bias in ASTM Test MethodsE691
8、Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test MethodE2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision LiquidsF431 Specification for Air Performance Measurement Plenum Chamber for Vacuum Cleaners2.2 AMCA Standard:421085 Laborat
9、ory Methods of Testing Fans for Rating2.3 IEC Standard:5IEC 60312 Ed 3.262885-2 Surface Cleaning Appliances Part 2: Dry Vacuum Cleaners for Household UseMethods of orSimilar Use Methods for Measuring the Performance3. Terminology3.1 Definitions:3.1.1 air power, AP, W, nin a vacuum cleaner, the net t
10、ime rate of work performed by an air stream while expending energyto produce an airflow by a vacuum cleaner under specified air resistance conditions.1 This test method is under the jurisdiction of ASTM Committee F11 on Vacuum Cleaners and is the direct responsibility of Subcommittee F11.22 on Air P
11、erformance.Current edition approved Oct. 1, 2016Sept. 1, 2017. Published November 2016October 2017. Originally approved in 1988. Last previous edition approved in 20112016as F820 11.F820 16. DOI: 10.1520/F0820-16.10.1520/F0820-17.2 The boldface numbers in parentheses refer to the list of references
12、at the end of this standard.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from Air Movement and
13、 Control Association, Inc., 30 West University Dr., Arlington Heights, IL 600041893.5 Available from the IEC Web store, webstore.iec.ch, or American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.This document is not an ASTM standard and is intended only to provid
14、e the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the st
15、andard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.2 automatic bleed valve, nany device a part of a vacuum cleaners design, which automatically introduces an inten
16、tionalleak within the vacuum cleaners system when manufacturer specified conditions are met.3.1.3 corrected airflow, Q, cfm, nin a vacuum cleaner, the volume of air movement per unit of time under standardatmospheric conditions.3.1.4 input power, W, nthe rate at which electrical energy is absorbed b
17、y a vacuum cleaner.3.1.5 model, nthe designation of a group of vacuum cleaners having the same mechanical and electrical construction with onlycosmetic or nonfunctional differences.3.1.6 population, nthe total of all units of a particular model vacuum cleaner being tested.3.1.7 repeatability limit (
18、r), nthe value below which the absolute difference between two individual test results obtained underrepeatability conditions may be expected to occur with a probability of approximately 0.95 (95 %).3.1.8 reproducibility limit (R), nthe value below which the absolute difference between two test resu
19、lts obtained underreproducibility conditions may be expected to occur with a probability of approximately 0.95 (95 %).3.1.9 repeatability standard deviation (Sr),nthe standard deviation of test results obtained under repeatability conditions.3.1.10 reproducibility standard deviation (SR),nthe standa
20、rd deviation of test results obtained under reproducibilityconditions.3.1.11 sample, na group of vacuum cleaners taken from a large collection of vacuum cleaners of one particular model, whichserves to provide information that may be used as a basis for making a decision concerning the larger collec
21、tion.3.1.12 standard air density, std, lb/ft3,natmospheric air density of 0.075 lb/ft3 (1.2014 kg/m3).3.1.12.1 DiscussionThis value of air density corresponds to atmospheric air at a temperature of 68 F (20 C), 14.696 psi (101.325 kPa), andapproximately 30 % relative humidity.3.1.13 suction, inch of
22、 water, nin a vacuum cleaner, the absolute difference between ambient and subatmospheric pressure.3.1.14 test run, nthe definitive procedure that produces the singular result of calculated maximum air power.3.1.15 test station pressure, Bt, inch of mercury,nfor a vacuum cleaner, the absolute baromet
23、ric pressure at the test location(elevation) and test time.3.1.15.1 DiscussionIt is not the equivalent mean sea level value of barometric pressure typically reported by the airport and weather bureaus. It issometimes referred to as the uncorrected barometric pressure (that is, not corrected to the m
24、ean sea level equivalent value). Referto 5.4 for additional information.3.1.16 unit, na single vacuum cleaner of the model being tested.4. Significance and Use4.1 The test results allow the comparison of the maximum air power available when no dirt has been introduced into the vacuumcleaning system,
25、 that is, a completely clean filter or an empty, clean dirt container.5. Apparatus5.1 Plenum ChamberSee Specification F431 or IEC 60312, Section 5.2.8.2 (Figure 13c).62885-2, Section 5.8.3.5.2 Water Manometers, or equivalent instruments. One to measure from 0 to 6 in. (152.4 mm) in increments of 0.0
26、1 in. (0.254mm), and one with increments of 0.1 in. (2.54 mm) for use in making measurements above 6 in. (152.4 mm). A single instrumenthaving a resolution of 0.01 in. (0.254 mm) over the entire required range may be used instead of two separate instruments.5.3 Power analyzer, to provide measurement
27、s accurate to within 61 %.5.4 Barometer, with an accuracy of 60.05 in. (1.27 mm) of mercury, capable of measuring and displaying absolute barometricpressure, scale divisions 0.02 in. (0.51 mm) or finer.5.4.1 Mercury barometers, in general, measure and display the absolute barometric pressure. Some c
28、orrections may be neededfor temperature and gravity. Consult the owners manual.5.4.2 When purchasing an aneroid or electronic barometer, be sure to purchase one which displays the absolute barometricpressure, not the mean sea level equivalent barometric pressure value. These types of barometers gene
29、rally have temperaturecompensation built into them and do not need to be corrected for gravity.5.5 Sharp-Edge Orifice PlatesSee Specification F431.F820 1725.6 ThermometerSolid-stem, ambient thermometer having a range from 18 to 89F (or 8 to +32C) with graduations in 0.2F(0.1C), conforming to the req
30、uirements for thermometer 63F (17C) as prescribed in Specification E1. As an alternative,thermometers S63F or S63C, as prescribed in Specification E2251, may be used. In addition, thermometric devices such asresistance temperature detectors (RTDs), thermistors, or thermocouples of equal or better ac
31、curacy may be used.5.7 PsychrometerThermometers graduated in 0.2 F (0.1 C).5.8 Voltage-Regulator System, to control the input voltage to the vacuum cleaner. The regulator system shall be capable ofmaintaining the vacuum cleaners rated voltage61 % and rated frequency61 Hz having a wave form that is e
32、ssentially sinusoidalwith 3 % maximum harmonic distortion for the duration of the test.5.9 Orifice Adapter TubeSee Fig. 1.6. Sampling6.1 Aminimum of three units of the same model vacuum cleaner selected at random in accordance with good statistical practice,shall constitute the population sample.6.1
33、.1 To determine the best estimate of maximum air power for the population of the vacuum cleaner model being tested, thearithmetic mean of the maximum air power of the sample from the population shall be established by testing it to a 90 % confidencelevel within 65 %.6.1.2 Annex A2 provides a procedu
34、ral example for determining the 90 % confidence level and when the sample size shall beincreased.NOTE 2See Annex A2 for method of determining 90 % confidence level.7. Test Vacuum Cleaners7.1 New Test Vacuum CleanerRun the vacuum cleaner in at rated voltage 61% and rated frequency with filters in pla
35、ce for1 h with a wide-open inlet (without hose).7.2 Used Test Vacuum CleanersRecondition a used test vacuum cleaner; prior to the initial test run as follows:7.2.1 Thoroughly remove excess dirt from the vacuum cleaner. Without using tools for disassembly, clean the entire outersurface, brushes, nozz
36、le chamber, ductwork, inside of the chamber surrounding the primary filter, and inside hose and wands.FIG. 1 Orifice Adapter TubeF820 1737.2.2 For vacuum cleaners using disposable filters as the primary filters, use a new disposable primary filter from themanufacturer for each test. Install it as re
37、commended by the vacuum cleaner manufacturer.7.2.3 For vacuum cleaners using non-disposable dirt receptacles, empty in accordance with the manufacturers instructions andclean the receptacle until its weight is within 0.07 oz (2 g) of its original weight and install it as recommended by the vacuumcle
38、aner manufacturer.7.2.4 For vacuum cleaners using non-disposable dirt receptacles, empty in accordance with the manufacturers instructions andclean the receptacle until its weight is within 0.07 oz (2 g) of its original weight and install it as recommended by the vacuumcleaner manufacturer.NOTE 3It
39、is preferable to conduct this test method on new test vacuum cleaners prior to any other ASTM test methods to avoid contamination thatcould cause performance variations.7.3 Test Vacuum Cleaner SettingsIf various settings are provided, set the motor speed setting or suction regulator using themanufac
40、turers specifications as provided in the instruction manual for normal operation. If a different setting is used, make a noteof the deviation in the test report.8. Procedure8.1 Preparation for Test:8.1.1 Prepare the test unit in accordance with Section 7. Set-up the test system as shown in Fig. 2. O
41、n the intake side, use anadapter terminating with the wall inlet valve. This wall inlet is to be the one specified for installation with the power unit beingtested. All joints should be made in accordance with the manufacturers specifications and be free of leaks. Insert into the wallvalve a flexibl
42、e cleaning hose as provided with the system. The hose assembly should be that which is offered normally with theparticular unit being tested. For those systems, which provide for an external exhaust, connect 2 ft (0.6 m) of exhaust comprisedof tubing and exhaust muffler, if a muffler is provided as
43、part of the system.8.1.2 Set the manometers to zero and check all instruments for proper operation.8.1.3 Record the test station pressure and the dry-bulb and wet-bulb temperature readings within 6 ft (1.8 m) of the test area.Read the barometric pressure to the nearest 0.02 in. (0.51 mm) of mercury,
44、 and the dry-bulb and wet-bulb temperatures to thenearest 0.2 F (or 0.1 C).8.1.3.1 The test area shall be free of major fluctuating temperature conditions due to air conditioners or air drafts that wouldbe indicated by a thermometer at the immediate test area.8.1.4 Connect the manometer or equivalen
45、t instrument to the plenum chamber.8.1.5 Connect a power analyzer.8.2 Test Procedure:8.2.1 Connect the hose assembly to the plenum chamber hose adapter and seal only this connection (see Fig. 3).8.2.1.1 The end of the hose assembly should be inserted inside the hose connector adapter and be perpendi
46、cular to the plenumchamber.8.2.1.2 The end of the hose assembly shall not project into the plenum chamber.8.2.1.3 Any automatic bleed valve, which affects the air performance of the vacuum cleaner, shall not be defeated.NOTE 1Hose is to be supported in a straight line.FIG. 2 Vacuum Cleaning System T
47、est Set-upF820 1748.2.2 The hose should be supported and kept straight and horizontal over its entire length. Allowance should be made for theforeshortening of the hose assembly under the vacuum. Maintain the power unit and dirt canister in their normal operatingorientation.8.2.3 Operate the vacuum
48、cleaner with no orifice plate inserted in the plenum chamber inlet at nameplate rated voltage 61 %and frequency 61 Hz prior to the start of the test run to allow the unit to reach its normal operating temperature. For vacuumcleaners with dual nameplate voltage ratings, conduct testing at the highest
49、 voltage. Allow the unit to reach its normal operatingtemperature before each test run.8.2.4 The vacuum cleaner is to be operated at its nameplate rated voltage 61 % and frequency 61 Hz throughout the test. Forvacuum cleaners with dual nameplate voltage ratings, conduct the test at the highest voltage.8.2.4.1 Allow the vacuum cleaner to operate at the open orifice for 1 to 2 min between test runs.8.2.5 While operating the vacuum cleaner in accordance with 8.2.4, insert orifice plates sequentially into the orifice pla
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