BS EN ISO 2247:2002 pdf download.Packaging – Complete, filled transport packages and unit loads – V i bration,tests at fixed low frequency.
This International Standard specifies methods to carry out vibration tests on complete. filled transport packages or unit loads using sinusoidal excitation at fixed frequency. These tests may be used to assess the performance of packages and unit loads in terms of the strength or the protection that they offer to their contents when subjected to low frequency vibration. These tests may be performed either as a single test to investigate the effects of low frequency vibration or as a part of a sequence of tests designed to measure the ability of a package or unit load to withstand a distribution system that includes a vibration hazard at low frequency or repetitive shocks.
2 Normative references
The fol’owing normative documents coIian povsions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to. or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 2206, Packaging — Complete, filled transport packages — Identification of parts when testing.
ISO 2233, Packaging — Complete. filled transport packages and unit loads — Conditioning for testing.
ISO 2234, Packaging — Complete. filled transport packages and unit loads — Stacking tests using static load.
3 Term and definition
For the purposes of this International Standard, the following term and definition applies. test specimen a complete. tilled transport package or unit load
4 Principle
The test specimen is placed on a vibration table and subjected to a vibration using an approximately sinusoidal excitation at a fixed low frequency. The atmospheric conditions, the duration of the test, the peak acceleration, the attitude of the test specimen arid any method of restraint are predetermined.
5 Apparatus
5.1 Vibration equipment, meeting the following requirements:
a) capable of operating at a fixed peak to peak vertical component displacement and operational frequency within the range selected from Figure A.1 (see normative annex A). A rotary movement of the table is allowed;
b) of sufficient size and performance, in terms of power, displacement, frequency range and stiffness. Its lowest resonant frequency shall be higher than the highest test frequency. It shall be horizontal within a maximum angular deviation of 0,3°.
NOTE The table may be equipped with:
1) low fences to restrict sideways and endways movements during testing;
2) high fences o other means of maintaining a superimposed load in position on the test specimen during testing:
3) means to simulate the method of restraining the test specimen during transit.
5.2 Instrumentation. if required, meeting the following requirements:
a) comprising accelerometers, signal conditioners and data display or storage devices to measure and control the accelerations at the test surface;
b) having an acceleration response accurate to within ± 5 % over the frequency range specitied for the test.
6 Test specimen preparation and conditioning
6.1 Preparation
Fill the test specimen with its intended contents and ensure that the test specimen is closed normally, as If ready for distribution.
NOTE Simulated or substitute contents may be used provided that the dimensions and physical properties of such contents are as close as possible to those of the intended contents. The normal method of closure should still be used.
6.2 CondItioning
The test specimen shall be conditioned in accordance with one of the conditions described in ISO 2233.
7 Procedure
7.1 Common procedure for methods A and B
7.1.1 Wherever possible, the test shall be carried out in atmospheric conditions identical to those used for conditioning, particularly where this is critical to the materials or application of the test specimen. In other circumstances, the test shall be carried out in atmospheric conditions which approximate those used for conditioning as closely as is practicable.
7.1.2 Place the test specimen in the predetermined attitude on the vibration table (see 5.1), with the centre of its lowest face or its centre of gravity placed as near as practicable to the centre of the table; if the test specimen is not secured to the table it may be fenced.
7.1.3 If a superimposed load is required, the loading procedure shall comply with ISO 2234.
7.1.4 Subject the test specimen to vibration according to either method A (see 7.2) or method B (see 7.3).BS EN ISO 2247 pdf download.