2403-263-00077 Datasheet, PDF (18/20 Pages) Knowles Electronics – SPEAKER-16-4.7-MFD

Operating Tests
Cold Operation Test
Parameter
Cold Operation Test
(Ref. EN 60068-2-1)
Test Method and
Conditions
-20°C
rel. humidity not
controlled
signal acc. Chapter 2.3
Dry Heat Operation Test
Parameter
Dry Heat Operation
(Ref. EN 60068-2-2)
Test Method and
Conditions
+70°C
rel. humidity not
controlled
signal acc. Chapter 2.3
Salt Mist Test
Parameter
Salt Mist
(Ref. IEC60068-2-52,
Kb / Severity 2
Test Method and
Conditions
The part must be
subjected to 2 hours
spray of 5% NaCl salt
mist, at 35°C then be
left at 40°C and 95%
RH for 22h.
2403 263 00077
Duration
72h
Evaluation Standard
Measurements after 2 hours
recovery time.
All samples fully operable.
THD may be increased after
test. All other acoustical
parameters according
specification with tolerances
increased by 50 %.
Duration
500h
Evaluation Standard
Measurements after 2 hours
recovery time.
All samples fully operable.
The allowable change in
sensitivity shall not be greater
than 3 dB. All other acoustical
parameters according
specification with tolerances
increased by 50 %.
Duration
3 cycles
Evaluation Standard
The samples shall be washed
after the test with distilled water
and dried at T< 50°C.
Component may have reduced
performance, but must still
function properly. The allowable
sensitivity difference shall not
be greater than ±3dB from
initial sensitivity.
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