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
Manufacturers of extensometers should provide performance characteristics of their instruments under satm operating test conditions.
In general, both the amplitude and phase of the instrument may change as a function of frequency effects. The errors of the veri? NOTE 6—When autographic extensometer systems are used, care should be taken to minimize errors introduced by variances in the graph paper. Originally approved in Although this information is seldom adequate to allow the user to ignore errors due to their speci? They result from the following characteristics: This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification.
Subscription pricing is determined by: Aastm checks may be performed on ranges of interest or at strain levels of interest utilizing sstm veri? NOTE 12—If a test is expected to last more than 18 months, it is recommended that the extensometer system be veri? After the extensometer is removed, measure the distance between the marks left by the gage points or knife edges.
Should errors be greater than allowable at any of the spot check points, the extensometer system is to be completely veri? Extensometer results used below the lowest veri? For an extensometer with a gage length of 1 in.
These applied strains are compared with the indicated strains from the Type 3 extensometer systems, in order to establish its classi? NOTE 5—Extensometers asmt for high-temperature testing may be 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. The mechanism provided for moving one spindle relative to the other shall permit sensitive adjustments. Extensometer readings should be chosen starting with the minimum reading and are grouped in overlapping decades such that the maximum reading on one decade is the minimum on the next decade.
Extensometer systems are classified on the basis of the magnitude of their errors. Type 1; Type 2; and Type 3. See procedures as described in Test Methods E 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.
The use of an optical satm device is recommended when reading and measuring autographic records.
ASTM Ea – Standard Practice for Verification and Classification of Extensometer Systems
Take astmm average of the lengths thus established on each side of the rod as the gage length. The only prudent approach is to perform a Practice E 83 type of veri? Errors are based on net values from the zero point to each successive veri? If these are known and the temperature is known, then awtm low-temperature gage length can be calculated.
However, completely self-contained mechanical devices are permitted. If the machine system resolution is 0.
Need more than one copy? 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. Extensometer systems d83 be classified in accordance with the requirements as to maximum error of strain indicated: See procedures as described in Test Methods E If this is the case, prior to combining it with the other uncertainty components, divide it by two.
Time Interval Between Veri?
The actual lowtemperature gage length would be different since the material would change in length according to its coefficient of expansion characteristics. Standards Subsctiption may be the perfect solution.
Please first asm in with a verified email before subscribing to alerts. Known extensions enable the appled strains to be set.
If there are four or more gage points, take the average of the individual lengths as the gage length. This standard asfm not included in any packages.
A number in parentheses indicates the year of last reapproval. Strains in the second successive run are to be approximately the same as those of the? See procedures as described in Test Methods E A strain-gaged specimen can be used as a reference, or a specimen with known properties could be used to verify the extensometer results.
ASTM E83 – 16
This standard is also available to be included in Standards Subscriptions. They may be veri? Any output under these test conditions will likely cause deviations in the accuracy of the extensometer system as determined by the static veri?