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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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 loading curve. Errors are based on net values e833 the zero point to each successive veri?
This standard has been approved for use by agencies of the Department of Defense. There are to be at least? Although e883 kind of device usually has a stated accuracy of gage length, it must be veri?
For an extensometer with a gage length of 1 in. A strain-gaged specimen can be used as a reference, or a specimen with known properties could be used to verify the extensometer results.
However, completely self-contained mechanical devices are permitted.
Thoroughly inspect all parts associated with smooth operation of the instrument to ensure there are no excessively worn components. ASTM sstm not give any warranty express or implied or make any representation that sstm contents of this abstract are accurate, complete or up to date.
Although it may be difficult to establish effects on zero null point or gage length accuracy, this setup can be used to measure any changes to the span of the device.
ASTM E83 – 16
In addition to the terms listed, see Terminology E 6. The practice is applicable only to instruments that indicate or record values that are proportional to changes in length corresponding to either tensile or compressive strain. The extensometer may astj be attached directly to the mechanism or interfaced with it in a manner similar to normal operation that is, possibly without contact for some optical extensometers. Record the temperature during each veri? These methods, if carefully implemented, would give quantitative information on the dynamic effects on the accuracy of the extensometer.
These errors can be due to dimensional changes from reproduction or humidity changes. In addition, the astk length error for Type 1 extensometers shall not exceed the greater of the values shown in Table 1. 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. An extensometer of known dynamic properties can ast, used in parallel with the device in question, and a comparison of the results can be made as a function of frequency.
The test conditions frequency and amplitude should be applied to the extensometer attached to a single anvil as shown.
ASTM E83 – 16 Standard Practice for Verification and Classification of Extensometer Systems
If these are known and the temperature is known, then the low-temperature gage length can be calculated. B The strain of an Extensometer System is the ratio of applied extension to the gage length. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Extensometer systems are classified on the basis of the magnitude of their errors. Current edition approved May 1, If there are four or more gage points, take the average of the individual lengths as the gage length. For example, if a chart recorder or XY plotter were being used, then the pen response might be the limiting factor; or if a digital readout device is used, they are often? An extensometer that attaches directly to the specimen should be removed and then reattached to the veri?
When greater temperature variations occur, the uncertainty due to this increased temperature variation shall be included in the determination of measurement uncertainty.
ASTM E83 – 16 – Standard Practice for Verification and Classification of Extensometer Systems
This can best be accomplished by verifying each system extensometer and readout device individually and also in combinations that would be used simultaneously. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
This appendix is not intended to provide e883 Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or aetm phonefaxor service astm.
Strains in the second successive run are to be approximately the same as those of the? It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
You may delete a document from your Alert Profile at any time. Remove any dirt particles which may have accumulated through normal use of the instrument. Extensometer systems are classified on the basis of the magnitude of their errors. Error of StrainB not to Exceed the Greater of: During each run, displace the extensometer to the maximum positive value, then to the maximum negative value, and then back to zero, stopping at each veri?
Determine and record the error from each measurement, which is the difference between the measured gage length and the speci?