5.5.1.3. Temperature Cycle Test
Parameter
Test Method and
Duration
Evaluation Standard
Conditions
Change of Temperature
(Ref. EN 60068-2-14)
-40°C/+85°C
5 cycles
Measurements after 2 hours
recovery time.
Transition time <3 min.
See Figure 5-1 below
>2h for each
temperature
All samples fully operable.
All acoustical parameters
according specification with
tolerances increased by 50 %.
+85°C
-40°C
2h
2h
2h
2h
2h
2h
2h
2h
2h
2h
3m
3m
3m
3m
3m
3m
3m
3m
3m
3m
Figure 5-1: Temperature Cycle Test
5.5.1.4. Temperature / Humidity Cycle Test
Parameter
Test Method and
Conditions
Duration
Evaluation Standard
Damp heat, cyclic
+25°C/+55°C
6 cycles / 144h
Measurements after 2 hours
recovery time.
(Ref. IEC 60068-2-30)
90% to 95% RH.
12h at each
temperature
(inclusive temp
ramp up/down)
All samples fully operable.
Temp. change time <3h
See Figure 5-2 below
All acoustical parameters
according specification with
tolerances increased by 50 %.
Caution: no condensed
water on products!
+55°C
+25°C
9h
9h
9h
9h
9h
9h
9h
9h
9h
9h
9h
9h
3h
3h
3h
3h
3h
3h
3h
3h
3h
3h
3h
3h
Figure 5-2: Temperature / Relative Humidity Cycle Test
©2011 Knowles Electronics
Page 18 of 22
Release – Revision: A
KNOWLES [ KNOWLES ELECTRONICS ]
