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2)
Loose
the " Battery Cover Screws
"
( 3-15,
Fig.
I
)
and take away
the
"
Battery Cover "
(
3-17, Fig,
L
)
from the instrument and remove
the
battery.
3)Replace
with
DC
1.5 V battery
(
UM3, AA,
Alkaline/heavy
duty ) x 6 PCs, and relnstate the
cover.
4)Make sure
the battery cover
is
secured
after changlng
the battery.
The ins,trument has RS232
PC
serial lnterface
vla
a 3.5
mm termlnal
( 3-12, Flg.
1
).
The data
output
ls
a
16
diglt stream whlch can
be
utillzed for
user's speclflc application.
A
RS232
lead
wlth the followlng connection will
be
requlred
to
link
the
instrument wlth the
PC
serlal port.
The
16
digits data stream wlll be displayed ln the
followlng format
:
10. RS232
PC
SERIAL INTERFACE
Center Pln........
(3.5
mm Jack plug)
Ground/shield...
I
Pin
4
Pin
Pin
2.2K
reslstor
2l
Each d
it
indicates the followi
status
:
RS232
FO
RMAT:
9 600
N B
1'l
Preoare
the optional
"
SOUND
CAUBRATOR
". such
as
-'
i
st-s+r
"
or'"
sC-942
"
( set range to 94'0 dB
)'
Poyver
on
inl
sorna
calibrator
ti
plug calibrator outp-ut socket
into
ttt"
"
Microphone
"
head ( 3-9, FIg' 1 ) of the
Sound Level meter.
2)Select manual range
to'50
-
100 dB
"
:isetect
" Time Weighting " at
"
Fast
"
position'
1
Start Word
D15
4
D14
send
the
uPPer
disPlaY
data
=
1
send
the lower
dis
data
=
2
D13
D
for
ato
cl
r
nun
B=17
D12,
D11
1=N
ative
Polarity
=
Posltive
D10
tion from right to the
left
becimal
Polnt(DP
),
posi
0=NoDP
1=
1DP
2=2DP 3=3DP
D9
Dlsplay reading, D1 =
For examPle
:
If
the display reading is 1234, then
DB
to
LsD, D8
=
MSD
D1
ls:
00001234
DB tO D1
End Word
DO
9600
Baud
rate
No
Pa
I
Data bits
Data
bit
no.
bit
1
bit
11. CALTBRATION
20
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