2403-263-00077 Datasheet, PDF (16/20 Pages) Knowles Electronics – SPEAKER-16-4.7-MFD

2403 263 00077
4. Environmental Tests
Qualification Tests
According to our milestone plan (Product Creation Process), a complete qualification test will be
done at design validation on products, manufactured under serial conditions and 1x per year and
product family. The qualification process covers all tests described under 4.5 and a complete
inspection takes place.
Requalification Tests
1x per month and product family samples are taken and submitted to tests described under 0
Sample Size, Sequence
Unless otherwise stated 20 arbitrary new samples will be used to perform each test for both,
qualification and requalification test as described under 0 and 0.
Period of Shelf-Life
The period of shelf-life is 12 months.
Testing Procedures
Storage Tests
Low Temperature Storage Test
Parameter
Low Temperature
Storage
(Ref. EN 60068-2-1)
Test Method and
Conditions
-40°C
rel. humidity not
controlled
High Temperature Storage Test
Parameter
Dry Heat Storage
(Ref. EN 60068-2-2)
Test Method and
Conditions
+85°C
rel. humidity not
controlled
Duration
168h
Evaluation Standard
Measurements after 2 hours
recovery time.
All samples fully operable.
All acoustical parameters
according specification with
tolerances increased by 50 %.
Duration
168h
Evaluation Standard
Measurements after 2 hours
recovery time.
All samples fully operable.
All acoustical parameters
according specification with
tolerances increased by 50 %.
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