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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The calibration procedure may include adjustment of span or determination of calibration factor, or both. 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 actual lowtemperature gage length would be different since the material would change in length according to its coefficient of expansion characteristics. This is especially true with optical extensometers which may be adversely affected by air density changes associated with thermal gradients and turbulence, environmental chamber windows, or specimen changes due to the environment. Time Interval Between Veri? These should be speci?
Although this information is seldom adequate to allow the user to ignore errors due to their speci? 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.
In addition, the gage length error for Type 1 extensometers shall not exceed the greater of the values shown in Table 1. E 83 axtm 06 Standard Practice for 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. See procedures as described in Test Methods E Extensometer systems shall be categorized in three types according to gage length: Link to Active This link will always route to the current Active version of the standard.
If the machine system resolution is 0. When greater temperature variations occur, the uncertainty due to this increased temperature variation shall be included in the determination of measurement uncertainty. These methods, e38 carefully implemented, would give quantitative information on the dynamic effects on the accuracy of the extensometer. Extensometer systems shall be classified in accordance with the requirements as astmm maximum error of strain indicated: The component due to the extensometer system resolution at 10 mm, uR1 is: Otherwise, spot checks are not valid.
Record the temperature during each veri? The use of an optical magnifying device is recommended when reading and measuring autographic records. If start-up backlash is evident, the veri?
Report all percent values of accuracy, and report the indicator resolution at least once per decade. If the document is revised or amended, you will be notified by email. These forces can lead to slipping of the extensometer which will give errors in strain. Any output under these test conditions will likely e833 deviations in the accuracy of the extensometer system as determined by the static veri?
For extensometers that attach directly to the specimen, the veri? They may be veri? Should errors be greater than allowable at any of the spot check points, the extensometer system is to be completely veri?
These applied strains are compared with the indicated strains from the Type 3 extensometer systems, in order to establish its classi? The mechanism provided for moving one spindle relative to the other shall permit sensitive adjustments.
The extensometer may either be attached directly to the mechanism or interfaced with it in a manner similar to normal operation that is, possibly without asmt for some optical extensometers. Extensometers that use autographic methods shall have their charts read and recorded using a suitable measuring device, such as a vernier or dial caliper.
Historical Version s – view previous versions of standard. Errors are based on net values from the zero point to each successive veri? NOTE 8—If the connection between the gage points attached to the specimen and the indicating device is made through geared wheels or micrometer screws, relatively large periodic errors may exist which might not be disclosed by this overall procedure. Although this kind of device usually has a stated accuracy of gage length, it must be veri?
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. If the dial micrometer is tapped during the veri?
See procedures as described in Test Methods E You can download w83 open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
It is naive to perform a static veri? 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.
They e8 from the following characteristics: Direct measurement of the trace soon after it was made eliminates the graph paper errors and is desirable for systems veri? Need more than one copy?