Reliability test, 40 c – BeStar BMS3450-02 LF User Manual
Page 6
5.1High temperature test
Temperature +85 C
Duration ≥1000hrs
5.2 Low temperature test
Temperature -40 C
Duration ≥500hrs
5.3 Humidity test
Temperature +40 C
Humidity 90-95%RH
Duration ≥56days
5.4 Temperature cycle durability:
-40 C/+85 C ≥100cycle (1 cycle=4h)
After each test of 5.2-5.5,the sound pressure level requirement must be fufilled.
5.5 Impact resistance:
100g for each three mutually perpendicular directions to each of 3 times by sine-wave:
no damage,no alternation of specified parameters
5.6 Proofness due vibrations:
sine-wave excitation;8...300Hz ,2g,
1 octaves/min; test time 16h each axes
5.7 Noise test :
10 -200Hz: 0.01g2/Hz,acceleration 1 .9g
200 - 1000Hz: -6dB / Oct.
Test time 8h each axes.
5.8.1 Shelf Life :
V
PP
=7.0V rectangle pulse shape, alternating ON for 10 sec./ OFF for 10secs
(equivalent to 180 cycle /h ) low or 1st control frequency is 600 Hz ,high or 2nd control frequecy is 3000Hz
Switch-on time(total) for 1st control frequency : 60h (10800 cycles)
Including 42.5h (7650 cycles) at T
amb
=+20 C
10h (1800 cycles) at T
amb
=+85 C
7.5h (1350 cycles) at T
amb
=-40 C
Switch-on time(total) for 2nd control frequency : 17h (3060 cycles)
Including 9h (1620 cycles) at T
amb
=+20 C
4.5h (810cycles) at T
amb
=+85 C
3.5h (630cycles) at T
amb
=-40 C
After these and the following tests the values of loudness ( 2dB) and sound (distortion)
must be within the specification.
5.8.2 Function of indicator:
Us=6.4V rectangle pulse shape, 10 times on/off, pause for 10sec. according one indicatorphase.(note diagram fig 1)
Total 150000 indicatorphase
Including 100000 indicatorphase at T
amb
=+20 C
25000 indicatorphase at T
amb
=+85 C
25000 indicatopphase at T
amb
=-40 C
5.Reliability test
Checked by:
Approved by:
Drawn by:
莫丽丽
Drawn
6
10/11/12
A
Rev.
A
Date
5
4
Note
Date:
Page:6 of 8
3
陶红仲
张秀琴
莫丽丽
2
1
Speaker
A
T
h
is
p
ri
n
t
a
n
d
i
n
fo
rm
a
tio
n
t
he
re
i
n
a
re
p
ro
p
ri
e
ta
ry
t
o
B
e
s
ta
r
E
le
c
tr
o
n
ics
I
ndu
s
tr
y
C
o
.,
L
td.
a
nd
s
h
a
ll
no
t
b
e
u
s
ed
i
n
w
h
o
le
o
r
in
pa
rt
w
ith
ou
t
it
s
w
ri
tt
en
c
on
tent
B
C
D
G
E
F
H
6
5
4
3
2
1
H
B
C
D
G
E
F
10/11/12
BMS3450-02 LF
DRG NO: BS/TES01.579A
BMS3450-02 LF
博 士 達