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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This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification.
A possible method to verify this at high temperature is the use of a precision reference specimen with known gage length placement of marks or? The gage length can be calculated from the known properties of the reference specimen and compared with the measurement. This standard is not included in any packages. The use of an optical magnifying device is recommended when reading asfm measuring autographic records.
ASTM E83 – 16 Standard Practice for Verification and Classification of Extensometer Systems
The changes in length shall be measured, for example, by means of an interferometer, calibrated standard gage blocks and an indicator, a calibrated micrometer screw, or a calibrated laser measurement system. In addition to the terms listed, see Terminology E 6. Link to Active This link will always route to the current Active version of the standard. Bonded resistance strain gauges directly bonded to a specimen cannot be calibrated or verified with the apparatus described in this practice for the verification of extensometers having definite gauge points.
These forces can lead to slipping of the extensometer which will give errors in strain. Take the average of the lengths thus established on each side of the rod as the gage length.
An extensometer that attaches directly to the specimen should be removed and then reattached to the veri?
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. These errors can be due to dimensional changes from reproduction or humidity changes.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. See procedures as described in Test Methods E It may consist of a aetm frame, suitable coaxial spindles, or other? If these are known and the temperature is known, then the low-temperature gage length can be calculated.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The record shall contain gage length and spot check test data; the name, serial number, veri? When greater temperature variations occur, the uncertainty due to this increased temperature variation shall be included in the determination of measurement uncertainty. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
NOTE 11—For Type 3 systems, precision marked, divided test pieces may be used to establish known gage lengths on the calibration device. Strains in the second successive run are to be approximately the same as those of the?
If the machine system resolution is 0. The measurement uncertainty of the error of an extensometer system determined at 10 mm is to be determined. For such extensometers it may be necessary to take additional readings within one turn of any geared wheel, micrometer screw, or the travel of one tooth e38 any meshing gear.
ASTM E83 – 16
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. NOTE 5—Extensometers used for high-temperature testing may be veri? For extensometers that attach directly to the specimen, the veri?
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. Subscription pricing is determined by: Extensometers that contain astn mechanical elements may have inertial effects which at high frequencies cause forces on the attachment points to the specimen. Extensometer systems shall be asrm in three types according to gage length: There are to be at least?
Errors are based on net values from the awtm point ast each successive veri? If the extensometer is used with closed loop test equipment in strain control, the backlash could result in large tension or compression loads during the initial part of the loading curve. If the dial micrometer is tapped during the veri? This specimen is then placed in the environmental chamber, and the environmental and optical conditions to be used in the test can be reproduced.
Standards Subsctiption may be the perfect solution. Although this kind of device usually has a stated accuracy of gage length, it must be veri? Link to Active This link will always route to the current Active version of the standard. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
ASTM Ea – Standard Practice for Verification and Classification of Extensometer Systems
If the reading does not return to zero, adjust and repeat the procedure until the reading does return to zero. If the document is revised or amended, you will be notified d83 email. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
These methods, if carefully implemented, would give quantitative information on the dynamic effects on the accuracy of the extensometer. The component due to the extensometer system resolution at 10 mm, uR1 is: Asym 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.
An extensometer that does not attach directly to the specimen should be moved away from the veri? If the extensometer is used with open or closed loop-type test equipment in load control, the users should disregard readings taken during the initial part of the d83 curve.