SN EN 60068-2-57 : 2000

INTRODUCTION
1 Scope and object
2 Normative references
3 Definitions
4 General requirements
5 Requirements for testing
      5.1 Vibration response investigation
      5.2 Time-history testing
      5.3 Mounting
6 Severities
      6.1 Test frequency range
      6.2 Required response spectrum
      6.3 Number and duration of time-histories
      6.4 Number of high peaks of the response
7 Preconditioning
8 Initial measurements
9 Testing
      9.1 General
      9.2 Vibration response investigation
      9.3 Time-history testing
10 Intermediate measurements
11 Recovery
12 Final measurements
13 Information to be given in the relevant specification
Annex A (informative) Synthesis of the artificial time-
                      history: Guidance
Annex B (informative) Test frequency ranges
Annex ZA (normative) Normative references to international
                     publications with their corresponding
                     European publications
Figure 1 - Flow chart for vibration, time-history
Figure 2 - Example of a typical response of an oscillator
           excited by a specific time-history (specified
           threshold value of 70%)
Figure 3 - Example of identification of the peaks of the
           response higher than a specified (70%) threshold
           value
Figure 4 - Typical envelope response spectrum
Figure 5 - Typical time-history
Figure 6 - Typical plot of a required response spectrum
Figure 7 - Category 1: recommended shape of a required
           response spectrum in generalized form
Figure 8 - Category 2: recommended shape of a required
           response spectrum in generalized form

Describes the basic environmental tests and procedures to determine, by the time-history method, the ability of a specimen to withstand specified severities of transient vibration. Covers general description, definitions, requirements for conditioning, severities, pre-conditioning, initial measurements, conditioning, intermediate measurements, recovery, final measurements and information to be given in the relevant specification.