ASTM F922-01(2006)
(Test Method)Standard Test Method for Motor Life Evaluation of an Electric Motorized Nozzle
Standard Test Method for Motor Life Evaluation of an Electric Motorized Nozzle
SIGNIFICANCE AND USE
The test results provide an indication of the motor life of an electric motorized nozzle. End of motor life will be judged in accordance with Section 3.
SCOPE
1.1 This test method covers the motorized nozzle used with household or commercial vacuum cleaner systems, that is, combination cleaners.
1.2 This test method provides a test for determining operating motor life in hours by an accelerated laboratory procedure. The motors are tested while mounted and operated in the motorized nozzle.
1.3 This test method covers only the motorized nozzle. The system used to provide the airflow source is not under consideration.
1.4 This test method is limited to the determination of motor life for an electrically powered household or commercial motorized nozzle.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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An American National Standard
Designation:F922–01(Reapproved 2006)
Standard Test Method for
Motor Life Evaluation of an Electric Motorized Nozzle
ThisstandardisissuedunderthefixeddesignationF922;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Removal Effectiveness of Household/CommercialVacuum
Cleaners
1.1 This test method covers the motorized nozzle used with
F655 Specification for Test Carpets and Pads for Vacuum
household or commercial vacuum cleaner systems, that is,
Cleaner Testing
combination cleaners.
1.2 This test method provides a test for determining oper-
3. Terminology
ating motor life in hours by an accelerated laboratory proce-
3.1 Description of Term Specific to This Standard:
dure.The motors are tested while mounted and operated in the
3.1.1 motor life—limited by failure of the motor. Failure is
motorized nozzle.
motor stoppage.
1.3 This test method covers only the motorized nozzle. The
3.1.1.1 Discussion—Any failure integral with the motor
system used to provide the airflow source is not under
such as armature assembly, field assembly, housing(s) bear-
consideration.
ings, motor cooling fan, carbon brush assemblies, motor-
1.4 Thistestmethodislimitedtothedeterminationofmotor
mountednonresettablethermalprotectivedevices,oranyother
life for an electrically powered household or commercial
componentjudgedtobeintegralwiththemotorshallbejudged
motorized nozzle.
as motor stoppage.
1.5 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
4. Significance and Use
information only.
4.1 Thetestresultsprovideanindicationofthemotorlifeof
1.6 This standard does not purport to address all of the
an electric motorized nozzle. End of motor life will be judged
safety concerns, if any, associated with its use. It is the
in accordance with Section 3.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Apparatus and Materials
bility of regulatory limitations prior to use.
5.1 Voltage Regulator System,tocontroltheinputvoltageto
the vacuum cleaner. The regulator system shall be capable of
2. Referenced Documents
2 maintainingratedvoltage 61%andratedfrequency 61Hzof
2.1 ASTM Standards:
the motorized nozzle having a wave form that is essentially
D75 Practice for Sampling Aggregates
sinusoidal with 3% maximum harmonic distortion for the
E337 Test Method for Measuring Humidity with a Psy-
duration of the test.
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
5.2 Voltmeter, to provide measurements accurate to within
peratures)
61%.
F431 Specification for Air Performance Measurement Ple-
5.3 Timer and Switch, having the capacity to control the
num Chamber for Vacuum Cleaners
off/on duty cycle of the nozzle and air flow source during the
F608 Test Method for Evaluation of Carpet Embedded Dirt
life test.
5.4 Wattmeter, to provide measurements accurate to within
ThistestmethodisunderthejurisdictionofASTMCommitteeF11onVacuum
1%.
Cleaners and is the direct responsibility of Subcommittee F11.30 on Durability- 1
5.5 Sharp-Edge Orifice Plate,a1 ⁄4-in. (32-mm) diameter
Reliability.
shall be in accordance with the orifice plate illustrated in
Current edition approved Jan. 1, 2006. Published January 2006. Originally
Specification F431.
approved in 1988. Last previous edition approved in 2001 as F922–01. DOI:
10.1520/F0922-01R06.
5.6 Plenum Chamber, conforming to the plenum chamber
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
specifications in Specification F431.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.7 Water Manometer, or equivalent instrument measuring
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. in increments of 0.1 in. (2.54 mm).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F922–01 (2006)
5.8 Barometer, with an accuracy of 60.05 in. Hg (1.27 mm cleaner or airflow source shall be stationary and positioned so
Hg), capable of measuring uncorrected barometric pressure that the hose will be submitted to minimum stresses.
with scale divisions of 0.02 in. (0.51 mm) or finer. 5.15 Test Dirt, Wedron sand/talc mixture. See Annex A1.
5.9 Thermometer, having a range of at least 18 to 80°F (−8
6. Sampling
to+27°C) and graduated in 1°F (0.5°C) increments.
5.10 Psychrometer, meeting the requirements of Test 6.1 Testaminimumofthreeunits(oralargersamplesizeif
Method E337 with thermometers graduated in increments of desired) of similar models using the same motor style and
1°F (0.5°C). amperage. Select all samples at random in accordance with
5.11 Test Carpet, conforming to the level loop carpet as good statistical practice. Results shall provide an 80% confi-
described in Specification F655.Acarpet that provides equiva- dence level within 610% of the mean value. If not, test
lent nozzle loading results may be used. additionalsamplesorreducetheresultsbythepenaltyfactoras
5.12 Carpet Padding (optional), if used, the test carpet calculated in 7.12.
paddingwillconformtothepaddingdescribedinSpecification
7. Procedure
F655.
5.13 Test Cleaner orAirflow Source—Themotorizednozzle 7.1 Determine initial performance. The suction of the
motor life evaluation tests shall be conducted using the airflow cleaner or airflow source with the motorized nozzle attached is
source and voltage resulting from the components which tobedeterminedtoensurethatnoleaksdeveloptoreduceload
comprise the combination system with which the motorized on the nozzle. For the test, the nozzle opening is to be sealed
nozzle is to be used. If used with several systems, the one with to theASTM plenum chamber with manometer (or equivalent)
the maximum airflow shall be used. connectedtothechamber,andwiththesharp-edgeorificeplate
5.13.1 Option—A simulated airflow source and adjusted intheholder.Themotorizednozzleistohavetheagitatordrive
voltage may be used if they are equal to or exceed the belt connected and a new filter bag in the cleaner or airflow
combination system with which the motorized nozzle is to be source.Theagitatorshallbeoperatingfreelywiththehandlein
used. operating position as shown in Fig. 1.
5.14 Test Fixture—A moving surface, covered by the test 7.1.1 With the motorized nozzle opening sealed to the
carpet supported on the test pad, which moves with a horizon- plenum chamber and without an orifice plate in the holder,
tal reciprocating motion, for a stroke distance of 27 in. (686 energize the cleaner and motorized nozzle at rated voltage 1%
mm)ineachdirectionattheaveragerateof1.8ft/s(0.55mps), and rated frequency 1 Hz for 5 min to stabilize motor
which results in 24 cpm (forward and back). This motion shall temperatures. See 5.13 if an optional airflow source is used.
be generated by rotating a 13.5-in. (343-mm) radius arm that 7.1.2 With the motorized nozzle operating at rated voltage
shall be connected to the platform with an arm at least 24 in. 61%andratedfrequency 61Hzandtheairflowsourceatthe
(610 mm) long or equivalent. This device shall provide means required voltage, insert the sharp-edge orifice plate into the
to hold the motorized nozzle fixed by its handle stationary in holder on the orifice box, in accordance with 5.5 and 5.6.
the operating position while it is in contact with the recipro- 7.1.3 Recordthemanometerreadingofthecombinedpower
cating surface. nozzle and airflow source as soon as the reading stabilizes.
5.14.1 Option—The motorized nozzle can be moved 7.1.4 Record the wattage of the nozzle on the plenum
through the same cycle as stated in 5.14 while the carpeted chamber. The wattage reading is used to monitor the nozzle
platform is held stationary. See Fig. 1. For either option, the load.
reciprocating motion shall follow the same duty cycle as 7.1.5 Repeat the test, recording the manometer and wattage
specified for the vacuum cleaner or airflow source and motor- reading of the cleaner or airflow source connected only to the
ized nozzle in 7.7. For the optional test fixture of Fig. 1, the plenum chamber.
reciprocatingarmmustbeateitherendofitshorizontalmotion 7.1.6 The airflow and wattage reading shall be measured
at the start of each “on” portion of the cycle. The vacuum every 168 h to determine if some component has failed and
FIG. 1 Test Fixture
F922–01 (2006)
degraded performance, reducing the load on the nozzle during 7.9 Spread 10 g of the standard dirt mixture (AnnexA1)at
the life test. If degradation exceeds 40% see 7.10. the start of the test and once every 24 h of cycling time on the
testcarpet.Spreadevenlyovertheareatraversedbythenozzle
7.1.7 Monitor the suction at the motorized nozzle daily
opening.
during the test, in addition to the weekly measurement on the
7.10 Test for degradation of performance every 168 h of
plenum chamber, to maintain loading and to ensure that no
cycling time.
mechanical problems exist.
7.10.1 Airflow Loss—In accordance with the procedure in
7.2 Use a new section of carpet and padding in accordance
AnnexA2,thesuctionatthestartofthetest,7.1.3,istobeused
with 5.11 and 5.12 without holes, tears, or other signs of wear
as the base for determining the 40% degradation of perfor-
whenthetestisstarted.Tautlysecurethecarpet.Thelayofthe
mance.Measuresuctionwithandwithoutthemotorizednozzle
carpet pile shall be such that during the forward stroke the
toensuredegradationisinthemotorizednozzle.Ifdegradation
powered nozzle moves in the direction of the lay of the carpet
isintheairflowsource,replaceorrepairtheairflowsourceand
pile. See Fig. 1. Measure the carpet pile height to determine
continue test. If degradation is in the motorized nozzle,
carpet wear in accorda
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