ASTM E83 PDF
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 measurement uncertainty of the error of an extensometer system determined at 10 mm is to be determined. Please first log in with a verified email before subscribing to alerts. Strain displacements in each decade are to be approximately 1: In addition to the terms listed, see Terminology E 6.
A verification procedure for extensometer systems shall be done in accordance with the specified requirements.
It is recommended that the same environmental chamber furnace or cryostat be used for the veri? Take the average of the lengths thus established on each side of the rod as the gage length. Extensometer systems are classified on the basis of the magnitude of their errors.
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ASTM E83 – 16
The source of these errors varies with the type of extensometer being used. This abstract is a brief summary of the referenced standard.
Aliasing can also be a factor in digital systems. See procedures as described in Test Methods E NOTE 12—If a test is expected to last more than 18 months, it is recommended that the extensometer system be veri? Add to Alert PDF. Although this kind of device usually ee83 a stated accuracy of gage length, it must be veri?
Time Interval Between Veri?
If this is the case, prior to combining it with the other uncertainty components, divide it by two. Strains in the second successive run are to be approximately the same as those astn the?
Work Item s – proposed revisions of this standard. 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. NOTE 3—The following is an example of an indirect method. 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.
Accuracy Assurance Between Veri? If readout devices are always used in combination, individual veri? As an alternative, after individual veri? If the dial micrometer is tapped during the veri? The accuracy of the gage length is dependent on the accuracy of the instrument and does not rely on precise placement of the?
Subscription pricing is determined by: Current edition approved May 1, If the reading does not return to zero, adjust and repeat the procedure until the reading does return to zero. As the voice of the E38. See procedures f83 described in Test Methods E This effect depends not only on the resonant frequency but the Q of the resonance.
This appendix is not intended to provide speci?
ASTM E83 – 16 Standard Practice for Verification and Classification of Extensometer Systems
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. If there are four or more gage points, take the average of the individual lengths as the gage length. In addition, the gage length error for Type 1 extensometers shall not exceed the greater of the values shown in Table 1. 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.
A strain-gaged specimen can be used as a e38, or a specimen with known properties could d83 used to verify the extensometer results.
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. 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? Note 1—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.
Ideally, this test should result in zero output over the performance range of interest. This practice covers procedures for the verification and classification of extensometer systems, but it is not intended to be a complete purchase specification. Extensometer results used below the lowest veri? It is not the measurement uncertainty of the extensometer or the measurement uncertainty of test results determined using the extensometer.
Should errors be greater than allowable at any of the spot check points, the extensometer system is to be completely 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. These forces can lead to slipping of the extensometer which will give errors in strain.
The mechanism provided for moving one spindle relative to the other shall permit sensitive adjustments. We have no amendments or corrections for this standard. For direct-reading extensometers the calibration factor is unity. 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. This standard is also available to be included in Standards Subscriptions.
Known extensions enable the appled strains to be set.