Ningbo Kepo Electronics Co.,Ltd.
4. Reliability Test
After being worked in a chamber at +80
±
2
℃
for 1 hour, then
sounder shall be placed in a chamber at -40
±
2
℃
for 1 hour(1
cycle is the below diagram).
After 10 above cycles, sounder shall be measured after being
placed in natural condition for 1 hour.
After being placed in a chamber with 90 to 95%R.H. at +60
±
2
for
℃
2 h and then being placed in natural condition for 240h ,
sounder shall be measured.
First being worked in a chamber with -40
±
2
for
℃
240h and
then being placed in a chamber with -40
±
2
℃
for 16h, finally
being placed in natural condtion for 2h, sounder shall be
measured.
After being woked in a chamber with +85
±
2
℃
for 240h and
then being placed in natural condition for 2h, sounder shall be
measured.
4
3
Thermal Shock
Test
Humidity Test
2
1
Low Temperature
Test
High Temperature
Test
Item
Specification
After test(1~7item), the transducr S.P.L . difference shall be within
±
10dB, and the
appearance not exist any change to be harmful to normal operation(e.g.
cracks,rusts,damages and especially distortion).
Model No. :
Page
Revision No.
Drawing No.
4/10
Specification for Transducer
1.2
-40
℃
+80
℃
1 hour
20 Sec.
1 hour
KPT-1420A
OEM2103SPE
