BS EN 2591-403-2018 pdf free download.Aerospace series – Elements of electrical and optical connection – Test methods Part 403: Sinusoidal and random vibration
1 Scope
This European Standard specifies a method of determining the ability of elements of connection to withstand sinusoidal or random vibrations of specified severities.
It will be used together with EN 2591-100.
This test is based on EN 60068-2-6 and EN 60068-2-64.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —Part 100: General
EN 2591-101, Aerospace series — Elements of electrical and optical connection — Test methods —Part 101: Visual examination
EN 2591-201, Aerospace series — Elements of electrical and optical connection — Test methods —Part 201: Contact resistance – low level
EN 2591-202, Aerospace series — Elements of electrical and optical connection — Test methods —Part 202: Contact resistance at rated current
EN 2591-204, Aerospace series — Elements of electrical and optical connection — Test methods —Part 204: Discontinuity of contacts in the microsecond range
EN 2591-408, Aerospace series — Elements of electrical and optical connection — Test methods —Part 408: Mating and unmating forces
EN 60068-2-6, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal)
EN 60068-2-64, Environmental testing — Part 2-64: Test methods — Test Fh: Vibration, broad-band random (digital control) and guidance
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Preparation of specimens
4.1 Preparation
Specimens shall be prepared according to the technical specification.
4.2 Technical details – Technical specification
Unless specified in the technical specification, the following details shall be stated:
mounting method, type of cable and definition of specimen wiring;
specimens mated or unmated and fitted with protective covers (if applicable);
number of mating and unmating operations (if applicable);
type of accessories to be fitted on specimens;
initial measurements and requirements, (if applicable);
fixing points of sensors on specimens (if applicable);
test severity:
sinusoidal or random vibration curve (method A Figure 1 or method B Figure 2 or Figure 3);
temperature (maximum, minimum and ambient);
duration.
mating and unmating forces;
applicable contact resistance test (EN 2591-201 or EN 2591-202);
final measurements (if applicable).
Method A – Sinusoidal vibration
5.1 EN 60068-2-6
This test method is to be performed in accordance with the requirements of EN 60068-2-6.
5.2 Apparatus
The vibration apparatus shall meet the requirements Clause 4 of EN 60068-2-6.
5.3 Initial measurements
Initial measurements shall be carried out as specified in the technical specification
5.4 Procedure
5.4.1 Endurance
The specimens shall be subjected to endurance by sweeping as detailed in EN 60068-2-6, 8.2.1 at the levels specified in the product standard.
5.4.2 Test duration
The entire frequency range of 5 Hz to 3 000 Hz and return to 5 Hz shall be swept in 20 min. This cycle shall be performed 12 times in each of three axes so that test duration shall be approximately 12 h.
5.5 Preferred vibration levels
5.5.1 General
The product standard should indicate one or more of the following severities.
5.5.2 Level 1
Over the frequency range 5 Hz to 3 000 Hz, constant amplitude of 0,7 mm, or constant acceleration of 10 g, (cross-over frequency 59,6 Hz) whichever is the lesser.
5.5.3 Level 2
Over the frequency range 5 Hz to 3 000 Hz, constant amplitude of 1,0 mm, or constant acceleration of 20 g, (cross-over frequency 70,5 Hz) whichever is the lesser,
5.5.4 Level 3
Over the frequency range 5 Hz to 3 000 Hz, constant amplitude of 1,0 mm, or constant acceleration of 20 g, (cross-over frequency 70,5 Hz) whichever is the lesser up to a frequency of 119,1 Hz, followed by constant amplitude of 0,35 mm, or 30 g, (cross-over frequency 145,9 Hz) whichever is the lesser.
6 Method B – Random vibration
6.1 EN 60068-2-64
This test method is to be performed in accordance with the requirements of EN 60068-2-64.
6.2 Apparatus
The vibration apparatus shall satisfy the requirements for testing of Clause 4 of EN 60068-2-64.
6.3 Initial measurements
They shall be carried out as specified in the technical specification.BS EN 2591-403 pdf download