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
|Published (Last):||15 August 2014|
|PDF File Size:||18.9 Mb|
|ePub File Size:||20.27 Mb|
|Price:||Free* [*Free Regsitration Required]|
Type 1; Type 2; and Type 3. Ideally, this test should result in zero output over the performance range of interest. It may consist of a rigid frame, asttm coaxial spindles, or other?
In no case asrm the time interval between veri? For variable gage length extensometers, state the gage lengths veri? Maintain temperature stability by excluding drafts throughout the subsequent veri? These forces can lead to slipping of the extensometer which will give errors in strain.
NOTE 11—For Type 3 systems, precision marked, divided test pieces may be used to establish known gage lengths on the calibration device.
ASTM E83 – 16 Standard Practice for Verification and Classification of Extensometer Systems
They result from the following characteristics: The maximum allowable error in each class is the? NOTE 5—Extensometers used for high-temperature testing may be veri?
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. 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.
The position readout on a testing machine is not recommended for use in a Type 2 extensometer system.
Historical Version s – view previous versions of 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.
An extensometer of known dynamic properties can be used in parallel with the device in question, and a comparison of the results can be made as a function of frequency.
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. Calibration adjustments may then be made to the extensometer system after which two required veri? This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification.
As an alternative, after individual veri? They may be veri? Add to Alert PDF.
See procedures as described in Test Methods E In general, both the amplitude and phase of the instrument may change as a function of frequency effects. The gage length can be calculated from the known properties 8e3 the reference specimen and compared with the measurement.
Accuracy Assurance Between Veri? This standard is also available to be included in Standards Subscriptions.
Your Alert Profile lists the documents that will be monitored. 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?
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.
The use of an optical magnifying device is recommended when reading and measuring autographic records. If the document is revised or amended, you e38 be notified by email.
This specimen is then r83 in the environmental chamber, and the environmental and optical conditions to be used in the test can be reproduced. The test conditions frequency and amplitude should be applied to the extensometer attached to a single anvil as shown.
Known extensions enable the appled strains to be set.
ASTM E83 – 16
If the dial micrometer is tapped during the veri? 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? Although this kind of device usually has a stated accuracy of gage length, it must be veri?
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. Error of StrainB not to Exceed the Greater of: See procedures as described in Test Methods E Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If readout devices are always used in combination, individual 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.
This standard is not included in any packages. Extensometer systems are classified on the basis of the magnitude of their errors. If this measurement is used in the calculation of strain, then it is the inherent measurement accuracy that is the important factor rather than the error between the chosen length and the actual.
ASTM Ea – Standard Practice for Verification and Classification of Extensometer Systems
Allow sufficient time for the 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. Active view current version of standard Translated Standard: 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.
This abstract ee83 a brief summary of the referenced standard.