IEC 60068-2-27 is intended for equipment or products that could be subjected to infrequent or repetitive shocks during storage, use, or transportation. It is designed to uncover mechanical weaknesses and/or degradation caused by those shocks. Products are usually tested in an unpackaged condition but can be tested in their transport case when the latter may be considered to be part of the specimen.
IEC 60068-2-27 provides guidance for the test severity and the shape of the shock pulse vs. product application in Annex A. Whenever possible, the test severity and the shape of the shock pulse should reproduce the effects of the actual environment to which the specimen will be subjected, or to satisfy the design requirements if the goal is to assess structural integrity. This test is primarily intended for unpackaged specimens and for items in their transport case when the latter may be considered to be part of the specimen. If an item is to be tested unpackaged, it is referred to as a test specimen.
However, if the item is packaged, then the item itself is referred to as a product and the item and its packaging together are referred to as a test specimen. When used in conjunction with IEC 60068-2-47, this standard may be used for testing packaged products. This possibility was included in the 2005 version of IEC 60068-2-47 for the first time.
This standard is written in terms of prescribed pulse shapes. Guidance for the selection and application of these pulses is given in Annex A and the characteristics of the different pulse shapes are discussed in Annex B. Wherever possible, the test severity and the shape of the shock pulse applied to the specimen should be such as to reproduce the effects of the actual transport or operational environment to which the specimen will be subjected, or to satisfy the design requirements if the object of the test is to assess structural integrity.
For the purposes of this test, the specimen is always mounted to the fixture or the table of the shock test equipment during testing.
IEC 60068-2-81 specifies test methods using a synthesized shock response spectrum (SRS). It is intended for components, equipment, and products that may experience complex transient shocks. This test method centers on the use of SRS and techniques associated with SRS. This part of IEC 60068, designed for testing with a synthesized shock response spectrum(SRS) is intended for general application for components, equipment, and other products, hereinafter referred to as“specimens", when simulation of transient responses of a complex nature is required. The test method centers on the use of SRS and techniques associated with SRS.
The purpose of the test is to demonstrate the adequacy of the test specimen to resist the specified transient excitation, without unacceptable degradation of its functional and/or structural performance. It is particularly useful for tailoring shock responses where measured data are available from the operational environment. However, the test is applicable to any transient excitation within the limits of the testing apparatus.
The test method is based primarily on the use of an electrodynamic or servo-hydraulic vibration generator with an associated computer-based control system used as a shock testing system.
Other shock testing machines may be used, provided they fulfill the requirements of this standard.
lt is emphasized that SRS synthesis testing always demands a certain degree of engineering judgment. Both supplier and purchaser should be fully aware of this fact. The writer of the relevant specification is expected to select the testing procedure and the values of severity appropriate to the specimen and its use.
IEC 60068-2-29 This test is applicable to components, equipment, and other electrotechnical products, hereinafter referred to as "specimens", which, during transportation or in use, may be subjected to repetitive shocks. The bump test may also be used as a means of establishing the satisfactory design of a specimen in so far as its structural integrity is concerned and as a means of quality control. It consists basically of subjects, on a bump tester, a specimen to repetitive shocks of a standard pulse shape with specified peak acceleration and duration.
Scope: To provide a standard procedure for determining the ability of a specimen to withstand specified severities of the bump.
General description: This standard is written in terms of a prescribed number of repetitive half-sine pulses with a given peak acceleration and duration. The purpose of the test is to reveal the accumulated damage or degradation caused by repetitive shocks, and to use the information, in conjunction with the relevant specification, to decide whether a specimen is acceptable or not. It may also be used, in some cases, to determine the structural integrity of specimens or as a means of quality control. This test is primarily intended for unpackaged specimens and for items in their Transpo rt case when the latter may be considered as part of the specimen itself. The bumps are not intended to reproduce those encountered in practice. Wherever possible, the test severity applied to the specimen should be such as to reproduce the effects of the actual transport or operational environment to which the specimen will be subjected, or to satisfy the design requirements if the object of the test is to assess structural integrity. For the purpose of this test, the specimen is always fastened to the fixture or the table of the bump tester during conditioning. In order to facilitate the use of this standard, references are given in the main part where the reader is invited to refer to Appendix A, and the clause numbers in the main part are also referred to in Appendix A.
This standard is to be used in conjunction with I EC Publication 68-1: Basic Environmental Testing Procedures, Part 1: General and Guidance.
IEC 60068-2-6(sine) applies to components/ equipment which may be subjected to vibrations of a harmonic pattern – due to rotating, pulsating, or oscillating forces – during transportation or service. The test is aimed at determining mechanical weaknesses or degradation. IEC 60068-2-6 exposes specimens to sinusoidal vibrations over a specified frequency range for a specified duration. This part of IEC 68 gives a method of test which provides a standard procedure to determine the ability of components, equipment, and other articles, hereinafter referred to as specimens, to withstand specified severities of sinusoidal vibration. The purpose of this test is to determine any mechanical weakness or degradation in the specified performance of specimens and to use this information, in conjunction with the relevant specification, to decide the acceptability of the specimens. In some cases, the test method may also be used to demonstrate the mechanic& robustness of specimens and/or to study their dynamic behavior. Categorization of components can also be made on the basis of a selection from within the severities quoted in the test.
IEC 60068-2-64(random) evaluates how specimens resist dynamic loads subjected to vibration testing without degradation of their integrity. As an ISTA and ISO 17025 certified lab, we realize the importance of IEC 60068-2-64 vibration testing. Meeting the IEC random vibration testing requirements can be difficult. We understand the challenges and guide companies through the process. The IEC 60068-2-64 package testing standard addresses the structural integrity of packages during the transportation life cycle. The transit testing standard demonstrates the adequacy of equipment to resist dynamic loads under random vibration. Units that meet the test requirement have no acceptable degradation of function or structural integrity.
Broadband random vibration may be used to identify a number of issues. These issues include accumulated stress effects and the resulting mechanical weakness. Another issue could be the degradation in the unit's specified performance.
IEC 60068-2-64 transit testing is applicable to specimens that may be subjected to the vibration of a stochastic nature. This vibration can result from transportation or operational environments. For example, in aircraft, space vehicles, and land vehicles.
The methods and techniques in this integrity standard are based on digital control of random vibration. It permits the introduction of variations to suit individual cases if these are prescribed by the relevant specification.
Compared with most other IEC and package integrity standards, this test is not based on deterministic but on statistical techniques. Broad-band random vibration testing is therefore described in terms of probability and statistical averages.
It is emphasized that random testing always demands a certain degree of engineering judgment, and both supplier and purchaser should be fully aware of this fact. The writer of the relevant specification is expected to select the testing procedure and the values of severity appropriate to the specimen and its use.
IEC 60068-2-7 To prove the structural suitability of the equipment and other electrotechnical when subjected to forces produced and the satisfactory performance of components, products, hereinafter referred to as “specimens”, by steady acceleration environments (other than gravity) such as occur in moving vehicles, especially flying vehicles, rotating parts and projectiles, and to provide a constant acceleration test of structural integrity for certain components. Equipment, components and other electrotechnical products intended to be installed in moving bodies will be subjected to forces caused by steady accelerations. Naturally, such an environment is most pronounced in flying vehicles and rotating machinery, although in certain conditions accelerations in land vehicles may be of significant magnitude. In general, the accelerations encountered in service have different values along each of the major axes of the moving body, and, in addition, usually have different values in the opposite senses of each axis.
lf the attitude of the specimen is not fixed with regard to the moving body, then the relevant specification should prescribe a level, which may be applied along each of the major axes and senses of the specimen, having taken into account the maximum accelerations in different axes of the moving body.
This standard is to be used in conjunction with IEC Publication 68-1: BasicEnvironmental Testing Procedures, Part 1: General and Guidance.
This test is divided into two procedures. The first simulates falls that a specimen, normally in the unpacked state, could undergo during handling and is normally restricted to two falls from a prescribed attitude onto a specified surface from a specified height. The second procedure simulates repeated falls that may occur to such devices as connectors or small remote control units which are normally attached to cables during use. Repeated falls onto a specified surface from a specified height are achieved by using a suitable apparatus, e.g. a tumbling (rotating) barrel. To assess the effects on a specimen of simple standard tests intended to be representative of the fall likely to be experienced during rough handling, or to demonstrate a minimum degree of robustness, for the purpose of assessing safety requirements. This drop shock test is primarily intended for specimens not in their packing and for items in their transport case when the latter may be considered as part of the specimen itself.
IEC 60068-2-55 (bounce) provides a standard procedure for determining the ability of a specimen to withstand specified severities of bounce, e. g. when transported as loose cargo on wheeled vehicles. This new edition allows for loose cargo testing in a more general sense. This test is applicable to specimens that, during transportation on the load-carrying platform of wheeled vehicles either not fastened down or with some degree of freedom, may be subjected to dynamic stresses resulting from random shock conditions (bounce). The test may also be used as a simple means of assessing the satisfactory design of a specimen so far as its structural integrity is concerned. This test is primarily intended for specimens prepared for transportation, including specimens in their transport case when the latter may be considered as part of the specimen itself or packages. This test should not be used as a low-frequency vibration test. Although primarily intended for electrotechnical products, this standard is not restricted to them and may be used in other fields where desired. The test is no longer aligned with a special testing machine but allows for use of any suitable equipment such as electrodynamic or servo-hydraulic shaker tables. Moreover, sinusoidal and random vibration can be used. The previous rotation table motions are included in Annex A as historical methods.