HD 323.2.59 S1:1991

Basic environmental testing procedures - Part 2: Tests - Test Fe: Vibration - Sine beat method HD 323.2.59 S1:1991

Scope

This standard details methods for testing components equipments and other electrotechnical products (hereinafter referred to as "specimens") which in service can be subjected to pulsating or oscillating forces of short duration caused for example by seismic or explosive phenomena or by vibration in machinery - In this test the specimen is excited at fixed frequencies with a preset number of sine beats (see figure 1) - These fixed test frequencies are predetermined frequencies, critical frequencies identified by means of a sinusoidal vibration test (IEC 68-2-6) or both - Pauses are provided between the individual sine beats in order to allow decay of the free response of the specimen - Specification writers will find in clause 12 a list of details to be considered for inclusion in specifications and in annex A the guidance necessary - Object: To provide a standard procedure for determining by the sine-beat method the ability of a specimen to withstand specified severities of transient vibrations