IEC 60068-2-75:2014 provides three standardized and coordinated test methods for determining the ability of a specimen to withstand specified severities of impact. It is used, in particular, to demonstrate an acceptable level of robustness when assessing the safety of a product and is primarily intended for the testing of electrotechnical items. It consists of the application to the specimen of a prescribed number of impacts defined by their impact energy and applied in the prescribed directions. This part of IEC 60068 covers energy levels ranging from 0,14 J (joules) to 50 J (joules). This second edition cancels and replaces the first edition, published in 1997, and constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: – reconsideration of some values in Tables 1 and 2. Although some values are no longer recommended, they have been retained as alternatives for historical consistency purposes. It has the status of a horizontal standard in accordance with \/2.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3 Terms and definitions 4 Provisions common to all hammer test methods 4.1 Severities 4.1.1 General 4.1.2 Impact energy value <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.1.3 Number of impacts 4.2 Test apparatus 4.2.1 Description Tables Table\u00a01 \u2013 Coordinated characteristics of the striking elements <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.2.2 Mounting 4.3 Preconditioning 4.4 Initial measurements 4.5 Testing 4.5.1 General Figures Figure 1 \u2013 Example sketch of a striking element <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 4.5.2 Attitudes and impact locations 4.5.3 Preparation of the specimen 4.5.4 Operating mode and functional monitoring 4.6 Recovery 4.7 Final measurements 4.8 Information to be given in the relevant specification <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5 Test Eha: Pendulum hammer 5.1 Test apparatus 5.1.1 General 5.1.2 Test apparatus for severities not exceeding 1 J 5.1.3 Test apparatus for severities of 2 J and above 5.2 Height of fall Table 2 \u2013 Height of fall <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.3 Testing 6 Test Ehb: Spring hammer 6.1 Test apparatus Figure 2 \u2013 Derivation of measuring point <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 6.2 Influence of earth’s gravity 6.3 Calibration 7 Test Ehc: Vertical hammer 7.1 Test apparatus 7.2 Height of fall Figure 3 \u2013 Shape of release head for 2 J <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | Annex A (normative) Shapes of striking elements Figure A.1 \u2013 Example of a striking element for \u2264 1 J Figure A.2 \u2013 Example of a striking element for 2 J <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Figure A.3 \u2013 Example of a striking element for 5 J Figure A.4 \u2013 Example of a striking element for 10 J <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | Figure A.5 \u2013 Example of a striking element for 20 J Figure A.6 \u2013 Example of a striking element for 50 J <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | Annex B (normative) Procedure for the calibration of spring hammers B.1 Principle of calibration B.2 Construction of the calibration device B.3 Method of calibration of the calibration device <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | B.4 Use of the calibration device <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure B.1 \u2013 Calibration device <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Figure B.2 \u2013 Pendulum “c” Figure B.3 \u2013 Steel spring of pendulum “c” <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure B.4 \u2013 Details of calibration device <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Figure B.5 \u2013 Arrangement for the calibration of the calibration device <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure B.6 \u2013 Division of scale plate “f” <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Annex C (informative) Guidance notes C.1 When is an impact test appropriate? C.2 Choice of test apparatus C.3 Choice of energy level Table C.1 \u2013 Energy levels in joules <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | C.4 Information for testing <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex D (informative) Example of pendulum hammer test apparatus Figure D.1 \u2013 Test apparatus <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure D.2 \u2013 Striking element of the pendulum hammer for energies \u2264 1 J Figure D.3 \u2013 Mounting fixture <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure D.4 \u2013 Adapter for flush-type switches Figure D.5 \u2013 Adapter for lamp holders <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Annex E (informative) Example of spring hammer test apparatus Table E.1 \u2013 Kinetic energy of striking element <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Figure E.1 \u2013 Spring hammer test apparatus <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Environmental testing – Tests. Test Eh: Hammer tests<\/b><\/p>\n |