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AS 1545-1976
[Current]Methods for the calibration and grading of extensometers
Covers five grades of extensometers used in tension and compression testing, grading being in terms of repeatability of gauge length, and readability, repeatability and accuracy of indicated extension. The standard methods of calibration used at room temperature for grading purposes are described, and the requirements for calibrating devices are stated. Instructions for the issue of reports of calibration are included together with recommendations on certain constructional features of extensometers and the use of calibrating equipment. Also included are comprehensive tables of grading requirements for a wide range of values of strain and extension for extensometers of nominal gauge lengths 25, 50, 100 and 200 mm.
Published: 01/05/1976
Pages: 29
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Table of contents
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PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 DEFINITIONS
1.3 PRINCIPLE OF CALIBRATION
2 GRADING OF EXTENSOMETERS
2.1 GENERAL
2.2 REQUIREMENTS FOR GRADING
2.3 GAUGE LENGTH TO BE USED DURING CALIBRATION AND WHEN TESTING MATERIALS
2.4 MAGNIFICATION FACTOR
2.5 ASSESSMENT OF CALIBRATION
3 CALIBRATION OF EXTENSOMETERS
3.1 GENERAL
3.2 READABILITY OF INDICATED EXTENSION
3.3 MEASUREMENT OF GAUGE LENGTH
3.4 CALIBRATION FOR INDICATED EXTENSION
3.4.1 General
3.4.2 Preparation for Calibration for Indicated Extension
3.4.3 Single Range Extensometer
3.4.4 Multirange Extensometer
3.5 RECORD OF RESULTS
3.6 ASSESSMENT OF RESULTS
3.7 REPORT OF CALIBRATION
3.8 FREQUENCY OF CALIBRATION
APPENDIX A
A1 EFFECTS OF TEMPERATURE DURING CALIBRATION AND USE
A2 AUTOGRAPHIC RECORDING CHARTS
APPENDIX B
B1 GENERAL
B2 ACCURACY OF CALIBRATING DEVICES
APPENDIX C
Cited references in this standard
Content history
DR 73062
AS 1545-1976 Rec:2017
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