Find the most up-to-date version of BSI – BS EN at Engineering (c) BSI The European Standard EN has the status of a British Standard. University of H STANDARD BS EN DIN EN Metallic materials – Tensile test – Part 4: Verification of extensometers used in uniaxial testing; German version EN
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It supersedes BS A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application.
Compliance with a British Standard does not of itself confer immunity from legal obligations. C d This standard has been updated see copyright date and may have had e amendments incorporated.
This will be indicated in the amendment table on s n the inside front cover.
Metallurgical products, dilatometers, verification, classifications English version Metallic materials — Tensile test — Part 4: A version in any other language made by translation under the e b responsibility of a CEN member into its own language and notified to the m Central Secretariat has the same status as the official versions. The result 6 Classification of the extensometer 5 was eb.
Metallic materials — Tensile test — extensometer with known variations in length Method of test at ambient temperature ; provided by a calibration apparatus. Metallic materials — Tensile test — 4 Calibration apparatus Verification of the force measuring system of the tensile testing machine; The calibration apparatus which allows a known displacement lto be applied to the extensometer, — Part 3: Metallic materials — Tensile test — t Calibration of proving devices used for the may consist of a rigid frame with suitable coaxial verification of uniaxial testing machines; spindles or other fixtures to which the extensometer can be attached.
The calibration apparatus shall — Part 4: Metallic materials — Tensile test — comprise a mechanism for moving at least one of the Verification of extensometers used in uniaxial axial spindles and a device for measuring accurately testing; the change in length produced.
国际标准BS EN ().pdf
The variations in — Part 5: Metallic materials — Tensile test — length can be measured, for example, using an I Method of test at elevated temperatures. The gauge blocks, comparator, 1 Scope micrometer or interferometer used shall be cThis European Standard specifies a method for the calibrated by a method which is traceable to the y p static verification of extensometers used in uniaxial international unit SI of length and their accuracy o shall be known.
The error of the calibration C testing. The following extensometer be exercised at least twice by the indirect method is given as rn example. If possible, ne displacement is in such a way that the blades or points of the taken to a slightly negative value and ne to extensometer leave their marks.
Where appropriate, the extensometer is reset extensometer is removed, the distance between the to zero. The extensometer is removed and then placed back on the calibration L 1002-4 — Le apparatus. Depending on e I the expected use of the extensometer, the two series S B In the case of an extensometer having several gauge of measurements are made for increases in length or lengths, the verification shall be carried out for each for decreases in length or for both.
BS EN 10002-4:1995
For each measurement point, the relative bias error y is calculated see 5. The values of the c n cover the measuring range required to determine a resolution of the extensometer shall be in U, given material property. The maximum and accordance with the values given in Table 2. An example of verification ranges v o is given in Annex A.
The ranges of verification shall Nbe noted in the verification report.
Under normal conditions, it is recommended apparatus; that verification be carried out at intervals of 4 temperarature at which the verification was approximately 12 months. This interval shall not carried out; exceed 18 months unless the test is expected to last 5 nature of variations of length for which the more than 18 months, in e case the extensometer verification was carried out, i.
C d b The diagrams in Figure B.