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 mechanism provided for moving one spindle relative to the other shall permit sensitive adjustments. It should be used as a guide to make the user aware of possible errors in strain that result from environmental effects.
Extensometer asfm are classified on the basis of the magnitude of their errors. We have no amendments or corrections for this standard. An extensometer system may be one of three types. A number in parentheses indicates the year of last reapproval.
This standard e833 subject to revision at any time by the responsible technical committee and must be reviewed every? Time Interval Between Veri? Extensometer systems are classified on the basis of the magnitude of their errors.
ASTM E83 – 16
These errors can be due to dimensional changes from reproduction or humidity changes. 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 start-up backlash is evident, the veri? During each run, displace the extensometer to the maximum positive value, then to the maximum negative value, and then back astk zero, stopping at each veri?
The test conditions frequency and amplitude should be applied to the extensometer attached to a single anvil as shown. This abstract is a brief summary of the referenced standard. For an extensometer with a gage length of 1 in. 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.
ASTM E83 – 16 Standard Practice for Verification and Classification of Extensometer Systems
In addition, the gage length error for Type 1 extensometers 8e3 not exceed the greater of the values shown in Table 1. The component due to the extensometer system resolution at 10 mm, uR1 is: Ideally, this test should result in zero output over the performance range of interest. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor ashm astm.
Extensometers that use autographic methods shall have their charts read and recorded using a suitable measuring device, such as a vernier or dial caliper. 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.
Strain displacements in each decade are to be approximately 1: The resolution of the extensometer system at 0 mm is 0. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
It is naive to perform a static veri?
The source of these errors varies with the type of extensometer being used. Originally approved in The error in strain amplitude approaching a resonance will be positive, will peak at the resonance for underdamped systems and will become a negative error beyond the resonant point. If the reading does not return to zero, adjust and repeat the procedure until the reading does return to zero.
Set the extensometer to its starting position and mount it on a soft rod of the typical specimen size or diameter. NOTE 6—When autographic extensometer systems are used, care should be taken to minimize errors introduced by variances in the graph paper.
Extensometer r83 used below the lowest veri? Work Item s – proposed revisions of this standard. This standard is not included in any packages. Allow sufficient time for the veri? The actual lowtemperature gage length would be different since the material would change in length according to its coefficient of expansion characteristics.
Errors are based on net values from the zero point to each successive veri? Otherwise, spot checks are not valid. 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.
If this is the case, prior to combining it with the other sstm components, divide it by two. When greater temperature variations occur, the uncertainty due to this increased temperature variation shall be included in the determination of measurement uncertainty.
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.
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. Remove any dirt particles which may have accumulated through normal use of the instrument.
ASTM E83 – 10a Standard Practice for Verification and Classification of Extensometer Systems
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. If the document is revised or amended, you will be notified by email. If the extensometer is used with closed loop test equipment in strain control, the backlash could result in large tension or compression loads during the initial part of the loading curve.