ASTM. E is applicable for linear variable displacement transformers ASTM E also has multiple accuracy classifications similar to ASTM E83 for the. THE FOLLOWING DESCRIBED EQUIPMENT IN ACCORDANCE WITH. ASTM- E AND UTS SOPRev CERTIFICATE NUMBER: CR# GWASTM E Standard Practice for Verification and Classification of Extensometer Systems_自然科学_专业资料。GWASTM E
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ASTM E83 – 10a Standard Practice for Verification and Classification of Extensometer Systems
xstm This specimen is then placed in the environmental chamber, and the environmental and optical conditions to be used in the test can be reproduced. Maintain temperature stability by excluding drafts throughout the subsequent veri? Link to Active This link will always route to the current Active version of the standard.
It may be advantageous to evaluate the measurement uncertainty of the actual displacement standard used at the actual displacement for which the measurement uncertainty of the error of the extensometer is being determined. The mechanism provided for moving one spindle relative to the other shall permit sensitive adjustments.
This standard has been approved for use by agencies of the Department of Defense. Record the temperature during each veri? Strain displacements in each decade are to be approximately 1: Atm direct-reading extensometers the calibration factor is unity. Thoroughly inspect all parts associated with smooth operation of the instrument to ensure there are no excessively worn components.
Extensometer systems are classi? If start-up backlash is evident, the veri? Extensometers that use autographic methods shall have their charts read and recorded using a suitable measuring device, such as a vernier or dial caliper.
ASTM E83 – 16
There are to be at least? This can best be accomplished by verifying each system extensometer and readout device individually and also in combinations astn would be used simultaneously. This appendix is not intended to provide speci? The source of these errors varies with the type of extensometer being used. After the extensometer is removed, measure the distance between the marks left by the gage points or knife edges. Active view current version of standard Translated Standard: If there are four or more gage points, take the average of the individual lengths as the gage length.
E 83 — 06 Standard Practice for Veri? If the machine system resolution is 0. In no case shall the time interval between veri? If readout devices are always used in combination, individual veri? NOTE 6—When autographic extensometer systems are used, care should be taken to minimize errors introduced by variances in the graph paper. For variable gage length extensometers, state the gage lengths veri? The precision associated with gage aetm setting for a Type 2 extensometer should be speci?
Work Item s – proposed revisions of this standard.
ASTM E83 – 16 – Standard Practice for Verification and Classification of Extensometer Systems
These methods, if carefully implemented, would give quantitative information on the dynamic effects on the accuracy of the extensometer. A number in parentheses indicates the year of last reapproval.
Extensometers that contain large mechanical elements may have inertial effects which at high frequencies cause forces on the e8 points to the specimen. This standard is also available to be included in Standards Subscriptions. Note 1—Bonded resistance strain gauges directly bonded to a specimen cannot be calibrated or s83 with the apparatus described in this practice for the verification of extensometers having definite gauge points.
Aliasing can also be a factor in digital systems. Take the average of the lengths thus established on each side of the rod as the gage length.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. NOTE 7—If an extensometer is equipped with a dial micrometer, it may be necessary to lightly tap the dial micrometer to minimize the effects of friction and to ensure that the most stable and reproducible readings are obtained.
See procedures as described in Test Methods E In addition, the gage length error for Type 1 extensometers shall not exceed the greater of the values shown in Table 1.
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