1、Designation: F 420 04An American National StandardStandard Test Method forAccess Depth Under Furniture of Vacuum Cleaners1This standard is issued under the fixed designation F 420; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, th
2、e 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 measurement of the opera-tional ability of the vacuum cleaner, expressed as the
3、 accessdepth for a given furniture clearance above the floor.1.2 This test method can be used in testing household andcommercial vacuum cleaners.1.3 Inch-pound units are to be regarded as the standard. Thevalues given in parentheses are for information only.1.4 This standard does not purport to addr
4、ess 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 to use.2. Summary of Test Method2.1 The carpet nozzle is inserte
5、d under a horizontal rod andthe access depth is measured from the front of the rod.3. Significance and Use3.1 This test method is intended to provide a means ofevaluating the effective cleaning depth under furniture.3.2 Results of testing by this test method can be used as abasis for specifications
6、on cleaning under furniture.4. Apparatus4.1 A 0.75-in. (19-mm) diameter rod, mounted horizontallyin a suitable supporting device to provide heights under the rodfrom 0 to 10.0 in. (0 to 254 mm) in increments of 0.5 in. (12.7mm).4.2 A device for measuring access depth, (in inches ormillimetres) horiz
7、ontally from the face of the horizontal bar in4.1.4.3 Voltage Regulator System, to control the input voltage tothe vacuum cleaner. The regulator system must be capable ofmaintaining the vacuum cleaners rated voltage 61 % andrated frequency having a wave form that is essentially sinusoi-dal with 3 %
8、maximum harmonic distortion for the duration ofthe test.4.4 Voltmeter, to measure input voltage to the vacuumcleaner, to provide measurements accurate to within 61%.5. Sampling5.1 The access depth under furniture shall be established onthree samples.6. Preparation of Apparatus6.1 Prepare the apparat
9、us as shown in Figs. 1-3.7. Procedure7.1 Upright Vacuum Cleaners (Fig. 1):7.1.1 Place the upright vacuum cleaner in its most advanta-geous position for cleaning under furniture. Operate thevacuum cleaner at the vacuum cleaners nameplate ratedvoltage 61 % and rated frequency 61 Hz with the nozzleheig
10、ht in the lowest cleaning position on a bare floor surface.7.1.1.1 For vacuum cleaners with dual nameplate voltageratings, conduct the test method at the highest voltage.7.1.2 The access depth is the distance (in inches or milli-metres) measured from the front of the 0.75-in. (19-mm)diameter rod (wh
11、en in contact with the highest component ofthe vacuum cleaner) to the most advanced point of the inlet ofthe nozzle.NOTE 1If the access depth is influenced by the cleaner bag, nopressure is to be applied to the handle or the bag to reduce the height.NOTE 2The vacuum cleaner must be energized, if a s
12、oft bag ispresent, as the inflation changes the working height of the handle when itis in its lowest position. If there is no soft bag, or no inflation possible,there is no reason to energize the cleaner as the test is conducted on a barefloor surface and the nozzle suction will be at a minimum and
13、have littleeffect on the nozzle down-force.7.1.3 Measure the access depth for heights from 0 to 10 in.(0 to 254 mm) in 0.5-in. (12.7-mm) increments. If full insertionof the cleaning mechanism occurs before 10.0 in. (254 mm),record this height. Cleaning mechanism refers to all of the partsfrom the va
14、cuum cleaner nozzle to and including the handlegrip.7.2 Combination and Canister Vacuum Cleaners (Fig. 2 andFig. 3):7.2.1 Place the combination or canister vacuum cleanernozzle in its most advantageous position for cleaning underfurniture. Operate the vacuum cleaner at the vacuum cleaners1This test
15、method is under the jurisdiction of ASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.20 on Performance(Test Methods).Current edition approved Aug. 1, 2004. Published August 2004. Originallyapproved in 1975. Last previous edition approved in 2003 as F 420 99 (
16、2003).1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.nameplate rated voltage 61 % and rated frequency 61 Hz withthe nozzle in full contact with the bare floor surface or thelowest nozzle setting.7.2.2 Vacuum Cleaner Nozzle Perpendic
17、ular to VacuumCleaner (Fig. 2)The access depth is the distance (in inches ormillimetres) measured from the front of the 0.75-in. (19-mm)diameter rod (when in contact with the highest component ofthe cleaning system) to the most advanced point of the inlet ofthe nozzle when the front edge of the nozz
18、le is perpendicularto the vacuum cleaner in its most advantageous position forcleaning under furniture.7.2.3 Vacuum Cleaner Nozzle Not Perpendicular to VacuumCleaner (Fig. 3)The access depth is the distance (in inches ormillimetres) measured from the front of the 0.75-in. (19-mm)diameter rod (when i
19、n contact with the highest component ofthe cleaning system) to a line parallel to the rod and through thecenter line of the nozzle and front opening.7.2.4 Measure the access depth for heights from 0 to 10 in.(0254 mm) in 0.5-in. (12.7-mm) increments. If full insertionof the cleaning mechanism occurs
20、 before 10.0 in. (254 mm),record this height. Cleaning mechanism refers to all of the partsfrom the vacuum cleaner nozzle to and including the hose orwand grip.8. Report8.1 The report shall include a table and a plotted curveindicating the clearance above the floor (in inches or millime-tres) and th
21、e access depth (in inches or millimetres).9. Precision and Bias9.1 No justifiable statements can be made on precision (orbias) of this test method since the method determines whetheror not an attribute is present.10. Keywords10.1 access depth; furniture; vacuum cleanerFIG. 1 Access Depth for Upright
22、 Vacuum CleanersFIG. 2 a, b Access Depth for Combination and Canister Vacuum Cleaners (Nozzle Perpendicular to Vacuum Cleaner)FIG. 3 Access Depth for Combination and Canister Vacuum Cleaners (Nozzle Not Perpendicular to Vacuum Cleaner)F420042ASTM International takes no position respecting the validi
23、ty 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, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subjec
24、t 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 be addressed to ASTM International Headquarte
25、rs. 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 Standards, at the address shown below.This standard
26、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).F420043
