AS 60068.3.8-2004

Introduction1 Scope2 Normative references3 Terms and definitions4 Description of vibration test methods 4.1 General 4.2 Test methods 4.3 Accelerated testing5 Vibration environment of a specimen 5.1 General 5.2 Collecting information, preparing a decision 5.3 Definition of dynamic conditions6 Estimation of 'real life' dynamic conditions for the specimen 6.1 General 6.2 Measurement of dynamic conditions 6.3 Data analysis7 Selection of test method 7.1 General 7.2 Sine testing 7.3 Random testing 7.4 Mixed mode testing8 Vibration response investigation of the specimen 8.1 General 8.2 Aims, purposes 8.3 Sinusoidal excitation 8.4 Random excitation 8.5 Problem investigation (troubleshooting) 8.6 Survival pass/fail criterion 8.7 Information to be given in the relevant specification

Part of a suite of Standards that adopt the IEC 60068 series of Standards as Australian Standards. The series contains fundamental information on environmental testing procedures and severities of tests, including information on atmospheric conditions for measurement and testing. Although primarily intended for electrotechnical products, many of the environmental testing procedures are equally applicable to other industrial products.

This part of IEC 60068 provides guidance for selecting amongst the IEC 60068-2 stationary vibration test methods Fc sinusoidal, Fh random and F(x) Mixed mode vibration. The different steady-state test methods and their aims are briefly described in Clause 4. Transient test methods are not included.For vibration testing, the environmental conditions, especially the dynamic conditions for the specimen, should be known. This standard helps to collect information about the environmental conditions (Clause 5), to estimate or measure the dynamic conditions (Clause 6) and gives examples to enable decisions to be made on the most applicable environmental vibration test method. Starting from the condition, the method of selecting the appropriate test is given. Since real life vibration conditions are dominated by vibration of a random nature, random testing should be the commonly used method, see Table 1, Clause 7. The methods included hereafter may be used to examine the vibration response of a specimen under test before, during and after vibration testing. The selection for the appropriate excitation method is described in Clause 8 and tabulated in Table 2. In this standard specification, writers will find information concerning vibration test methods and guidance for their selection. For guidance on test parameters, or severities of one of the test methods, reference should be made to the normative references.

First published as AS 60068.3.8-2004.