ASTM F457-04
(Test Method)Standard Test Method for Speed and Distance Calibration of Fifth Wheel Equipped With Either Analog or Digital Instrumentation
Standard Test Method for Speed and Distance Calibration of Fifth Wheel Equipped With Either Analog or Digital Instrumentation
SIGNIFICANCE AND USE
This test method may be used for calibration of speed and distance measurement systems used on tire test vehicles and tire test trailers, or any land-based vehicle that contacts the road and that uses a trailing-wheel system for measurement of speed and distance. This test method applies only to hard, dry, smooth surfaces and is not accurate for highly curved vehicle paths. This test method does not encompass optical types of devices.
SCOPE
1.1 This test method covers the determination of vehicle speed and cumulative distance traveled using a device termed a fifth wheel and using appropriate associated instrumentation.
1.2 This test method also describes the calibration technique applicable to digital or analog speed and distance measurement systems employing a fifth wheel.
1.3 The values stated in SI (millimetre-kilogram) units are to be regarded as the standard.
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. For specific precautionary statements, see Section .
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation:F457–04
Standard Test Method for
Speed and Distance Calibration of Fifth Wheel Equipped
1
With Either Analog or Digital Instrumentation
ThisstandardisissuedunderthefixeddesignationF457;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 The fifth wheel assembly and signal transducer(s) are
attached to the vehicle or the test trailer so that the fifth wheel
1.1 This test method covers the determination of vehicle
remains in contact with the normal roadway surface while the
speed and cumulative distance traveled using a device termed
equipment is in motion. The rotation of this wheel is detected
a fifth wheel and using appropriate associated instrumentation.
in a suitable manner and is translated into measurements of
1.2 Thistestmethodalsodescribesthecalibrationtechnique
vehicle speed and distance with auxiliary equipment.
applicable to digital or analog speed and distance measurement
4.3 The speed is to be communicated to the vehicle operator
systems employing a fifth wheel.
at all times, and should be visible without undue distraction or
1.3 The values stated in SI (millimetre-kilogram) units are
a requirement for physical movement on the part of the
to be regarded as the standard.
operator.
1.4 This standard does not purport to address all of the
4.4 Fifth wheel calibration is performed by operating the
safety concerns, if any, associated with its use. It is the
device at a fixed speed over a known distance and comparing
responsibility of the user of this standard to establish appro-
the speed and distance readout to a known speed and distance.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. For specific
5. Significance and Use
precautionary statements, see Section 7.
5.1 This test method may be used for calibration of speed
2. Referenced Documents and distance measurement systems used on tire test vehicles
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and tire test trailers, or any land-based vehicle that contacts the
2.1 ASTM Standards:
road and that uses a trailing-wheel system for measurement of
F538 Terminology Relating to the Characteristics and Per-
speed and distance. This test method applies only to hard, dry,
formance of Tires
smooth surfaces and is not accurate for highly curved vehicle
F1082 Practice for Tires—Determining Precision for Test
3 paths. This test method does not encompass optical types of
Method Standards
devices.
3. Terminology
6. Apparatus
3.1 Refer to F538, Standard Terminology Relating to the
6.1 Fifth Wheel—The fifth-wheel assembly shall be of
Characteristics and Performance of Tires.
sufficient mechanical integrity to withstand long periods of
4. Summary of Test Method
sustained operation with minimal maintenance. The wheel
vertical pivot assembly shall be sufficient to permit directional
4.1 Vehicle speed and distance determinations are made by
changes without inducing lateral skidding of the fifth-wheel
use of a fifth wheel, signal transducer(s), and compatible
tire. The fifth-wheel assembly shall be equipped with a
display devices.
suspension capable of minimizing bounce and wheel hop, due
to roadway irregularities, to the extent necessary to ensure
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This test method is under the jurisdiction of ASTM Committee F09 on Tires
measurement accuracy. The wheel shall be equipped with a
and is the direct responsibility of Subcommittee F09.10 on Equipment, Facilities,
suitable tire, preferably of a straight-ribbed design. The tires
and Calibration.
3
Current edition approved Dec. 1, 2004. Published January 2005. Originally
shall have a minimum (new) size of 349–37 (16 3 1 ⁄8). Tire
approved in 1976. Last previous edition approved in 1999 as F457 – 94 (1999).
and wheel shall be balanced statically each time the tire is
DOI: 10.1520/F0457-04.
2 replaced.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 Instrumentation—Fifth-wheel systems shall be
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
equipped with either analog or digital instrumentation for
the ASTM website.
determining wheel rotation. Suitable readouts shall be pro-
3
Withdrawn. The last approved version of this historical standard is referenced
vided.
on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F457–04
6.2.1 Analog Instrumentation: successive approximation techniques of speed determination,
or both, are not recommended
...
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