BeStar BLS18-11-04H7.8-BOX LF - Manual (Page 5)

3.Sensitivity difference at 0.6~1.2KHz shall be within ±3dB from initial value after test.
4.5 Temperature Cycle Test
Cycles 4
Notice:
1.Immediately after reliability test,the samples shall be stored under climatic conditions
such as normally exist in ordinary rooms or laboratories.Unless otherwise noted,the
recovery period shall be 4hrs at least before performance testing.
2. After reliability test ,all samples must be meet the requirements specified
4.6 Drop Test
Height 1.0m
Drop face thick board (20mm)
Times 10 (three times in
each durection )
+25
-30
T( °C)
+75
t (h) 1
1 cycles
1 1
transition time:20-30s
4.3 Low Temperature Test
Temperature -30±3°C
Duration 96hrs
4.1 Load Test
Power (Nom) 1 .5W(sine wave)
Duration 96hrs
4.2 High Temperature Test
Temperature
+75 ±3°C
Duration 96hrs
4. Reliability Test
4.4 Damp Heat
Temperature 40±3°C
Relative Humidity
90%-95%RH
Duration
96hrs
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Drawn Rev. Date Approved by:
Checked by:
Note
Date:
Page:05 of 07
Speaker
A 06/02/09
李红元
王 平 王文邦
王文邦
06/02/09
DRG NO: BS/TES01.1124A
BLS18-11-04H7.8-BOX LF
BLS18-11-04H7.8-BOX LF