Standard Test Method for Motor Life Evaluation of an Electric Motorized Nozzle

SIGNIFICANCE AND USE
4.1 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Publication Date
31-Aug-2023
Technical Committee
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ASTM F922-01(2023) - Standard Test Method for Motor Life Evaluation of an Electric Motorized Nozzle
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F922 − 01 (Reapproved 2023)
Standard Test Method for
Motor Life Evaluation of an Electric Motorized Nozzle
This standard is issued under the fixed designation F922; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E337 Test Method for Measuring Humidity with a Psy-
chrometer (the Measurement of Wet- and Dry-Bulb Tem-
1.1 This test method covers the motorized nozzle used with
peratures)
household or commercial vacuum cleaner systems, that is,
F431 Specification for Air Performance Measurement Ple-
combination cleaners.
num Chamber for Vacuum Cleaners
1.2 This test method provides a test for determining oper-
F608 Test Method for Evaluation of Carpet Embedded Dirt
ating motor life in hours by an accelerated laboratory proce-
Removal Effectiveness of Household/Commercial
dure. The motors are tested while mounted and operated in the
Vacuum Cleaners
motorized nozzle.
F655 Specification for Test Carpets and Pads for Vacuum
Cleaner Testing (Withdrawn 2022)
1.3 This test method covers only the motorized nozzle. The
system used to provide the airflow source is not under
3. Terminology
consideration.
3.1 Definitions of Terms Specific to This Standard:
1.4 This test method is limited to the determination of motor
3.1.1 motor life—limited by failure of the motor. Failure is
life for an electrically powered household or commercial
motor stoppage.
motorized nozzle.
3.1.1.1 Discussion—Any failure integral with the motor
1.5 The values stated in inch-pound units are to be regarded
such as armature assembly, field assembly, housing(s)
as the standard. The values given in parentheses are for
bearings, motor cooling fan, carbon brush assemblies, motor-
information only.
mounted nonresettable thermal protective devices, or any other
1.6 This standard does not purport to address all of the
component judged to be integral with the motor shall be judged
safety concerns, if any, associated with its use. It is the
as motor stoppage.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4. Significance and Use
mine the applicability of regulatory limitations prior to use.
4.1 The test results provide an indication of the motor life of
1.7 This international standard was developed in accor-
an electric motorized nozzle. End of motor life will be judged
dance with internationally recognized principles on standard-
in accordance with Section 3.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Apparatus and Materials
mendations issued by the World Trade Organization Technical
5.1 Voltage Regulator System, to control the input voltage to
Barriers to Trade (TBT) Committee.
the vacuum cleaner. The regulator system shall be capable of
maintaining rated voltage 61 % and rated frequency 61 Hz of
2. Referenced Documents
the motorized nozzle, having a wave form that is essentially
2.1 ASTM Standards:
sinusoidal with 3 % maximum harmonic distortion for the
D75 Practice for Sampling Aggregates
duration of the test.
5.2 Voltmeter, to provide measurements accurate to within
61 %.
This test method is under the jurisdiction of ASTM Committee F11 on Vacuum
Cleaners and is the direct responsibility of Subcommittee F11.30 on Durability-
5.3 Timer and Switch, having the capacity to control the
Reliability.
off/on duty cycle of the nozzle and air flow source during the
Current edition approved Sept. 1, 2023. Published September 2023. Originally
approved in 1988. Last previous edition approved in 2016 as F922 – 01 (2016).
life test.
DOI: 10.1520/F0922-01R23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F922 − 01 (2023)
5.4 Wattmeter, to provide measurements accurate to within (610 mm) long or equivalent. This device shall provide means
1 %. to hold the motorized nozzle fixed by its handle stationary in
the operating position while it is in contact with the recipro-
5.5 Sharp-Edge Orifice Plate, a 1 ⁄4-in. (32-mm) diameter
cating surface.
shall be in accordance with the orifice plate illustrated in
5.14.1 Option—The motorized nozzle can be moved
Specification F431.
through the same cycle as stated in 5.14 while the carpeted
5.6 Plenum Chamber, conforming to the plenum chamber
platform is held stationary. See Fig. 1. For either option, the
specifications in Specification F431.
reciprocating motion shall follow the same duty cycle as
specified for the vacuum cleaner or airflow source and motor-
5.7 Water Manometer, or equivalent instrument measuring
in increments of 0.1 in. (2.54 mm). ized nozzle in 7.7. For the optional test fixture of Fig. 1, the
reciprocating arm must be at either end of its horizontal motion
5.8 Barometer, with an accuracy of 60.05 in. Hg (1.27 mm
at the start of each “on” portion of the cycle. The vacuum
Hg), capable of measuring uncorrected barometric pressure
cleaner or airflow source shall be stationary and positioned so
with scale divisions of 0.02 in. (0.51 mm) or finer.
that the hose will be submitted to minimum stresses.
5.9 Thermometer, having a range of at least 18 °F to 80 °F
5.15 Test Dirt, Wedron sand/talc mixture. See Annex A1.
(−8°C to +27 °C) and graduated in 1 °F (0.5 °C) increments.
5.10 Psychrometer, meeting the requirements of Test 6. Sampling
Method E337 with thermometers graduated in increments of
6.1 Test a minimum of three units (or a larger sample size if
1 °F (0.5 °C).
desired) of similar models using the same motor style and
5.11 Test Carpet, conforming to the level loop carpet as amperage. Select all samples at random in accordance with
described in Specification F655. A carpet that provides equiva- good statistical practice. Results shall provide an 80 % confi-
lent nozzle loading results may be used. dence level within 610 % of the mean value. If not, test
additional samples or reduce the results by the penalty factor as
5.12 Carpet Padding (optional), if used, the test carpet
calculated in 7.12.
padding will conform to the padding described in Specification
F655.
7. Procedure
5.13 Test Cleaner or Airflow Source—The motorized nozzle
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
to be determined to ensure that no leaks develop to reduce load
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 the ASTM plenum chamber with manometer (or equivalent)
the maximum airflow shall be used.
connected to the chamber, and with the sharp-edge orifice plate
5.13.1 Option—A simulated airflow source and adjusted
in the holder. The motorized nozzle is to have the agitator drive
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. The agitator shall be operating freely with the handle in
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) in each direction at the average rate of 1.8 ft/s (0.55 mps), 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 % and rated frequency 61 Hz and the airflow source at the
FIG. 1 Test Fixture
F922 − 01 (2023)
required voltage, insert the sharp-edge orifice plate into the motorized nozzle. Operate the motorized nozzle at its regulated
holder on the orifice box, in accordance with 5.5 and 5.6. and applicable voltage. Operate the vacuum cleaner or airflow
source and motorized nozzle from a remote on-off switch and
7.1.3 Record the manometer reading of the combined power
nozzle and airflow source as soon as the reading stabilizes. time with a duty cycle of 8 min of operation followed by 2 min
off following the cycle condition set forth in 5.14.
7.1.4 Record the wattage of the nozzle on the plenum
chamber. The wattage reading is used to monitor the nozzle
7.8 Measure the suction of the motorized nozzle with the
load.
airflow source initially and daily on the test fixture to provide
7.1.5 Repeat the test, recording the manometer and wattage
a base line for identifying if degradation has occurred. The unit
reading of the cleaner or airflow source connected only to the
can then be removed and tested on the plenum chamber to
plenum chamber.
determine if it exceeds the degradation limitation in accordance
7.1.6 The airflow and wattage reading shall be measured
with 7.11.1 and 7.11.2.
every 168 h to determine if some component has failed and
7.9 Spread 10 g of the standard dirt mixture (Annex A1) at
degraded performance, reducing the load on the nozzle during
the start of the test and once every 24 h of cycling time on the
the life test. If degradation exceeds 40 %, see 7.10.
test carpet. Spread evenly over the area traversed by the nozzle
7.1.7 Monitor the suction at the motorized nozzle daily
opening.
during the test, in addition to the weekly measurement on the
plenum chamber, to maintain loading and to ensure that no 7.10 Test for degradation of performance every 168 h of
mechanical problems ex
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