Model:
732A, 735
Digital Sound Level Meter
USER MANUAL
CONTENTS
Title
Page
I.
SAFETY INFORMATION………..……….………….. 1
Environment conditions…………………………….....1
Maintenance & Clearing……………………………….1
Safety symbols………………………………………… 1
GENERAL DESCRIPTION……………………..…….. 2
II.
III. SPECIFICATIONS..…………………..……………….. 2
IV. NAME AND FUNCTIONS..………….……………….. 5
V.
CLOCK & INTV SETUP……….……………….……… 6
DataLogger…………………………………………….. 6
Clock Setup……………………………………………...6
Recording Interval Setup………………………………7
Auto Power Off………………………………………… 7
.
VI. CALIBRATION PROCEDURES….………………….. 7
VII . MEASUREMENT PREPARATION………….………. 8
VIII. OPERATING PRECAUTIONS………………………. 8
IX.
X.
MEASUREMENT………….………………………..… 9
Setup TestLink AK-73X (Sound Level Meter)—
RS232 interface software……………………..….…...9
I. SAFETY INFORMATION
Read the following safety information carefully before attempting to operate or
service the meter.
Use the meter only as specified in this manual; otherwise, the protection provided
by the meter may be impaired.
Environment conditions
Altitude up to 2000 meters
Relatively humidity 90% max.
Operation Ambient 0° ~ 40°C
Maintenance & Clearing
Repairs or servicing not covered in this manual should only be performed by
qualified personnel.
Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on
this instruments.
Safety symbols
Comply with EMC
When servicing, use only specified replacement parts.
II. GENERAL DESCRIPTION
Thank you for using our Data Logger Sound Level Meter. To ensure that you can
get the most from it, we recommend that you read and follow the manual carefully
before use.
This unit conforms to the IEC651 type2, ANSI S1.4 Type2 for Sound Level Meters.
This Data Logger Sound Level Meter internal memory can keep up to 32000
records.
(Note 1.)
It uses RS232 interface to perform bi-directional communication with PC.
Note1 (model 735):
Press “REC” to begin recording, press “REC” again to stop recording.
the memory until it is full.
The data will be loaded into
1
III. SPECIFICATIONS
Standard applied: IEC651 Type2, ANSI S1.4 Type2.
Frequency range: 31.5Hz ~ 8KHz
Measuring level range: 30 ~ 130dB
Frequency weighting: A / C
Microphone: 1/2 inch electret condenser microphone
Display: LCD
Digital display: 4 digits
Resolution: 0.1dB
Display Update: 0.5 sec.
Analog display: 50 segment bargraph
Resolution: 1dB
Display Update: 50 mS
Time weighting: FAST (125mS), SLOW (1 sec.)
Level ranges: Lo: 30 – 80 dB
Med: 50 – 100 dB
Hi:
80 – 130 dB
Auto: 30 – 130 dB
Accuracy:
±1.5dB
(under reference conditions @ 94dB, 1KHz)
Dynamic range: 100 dB (50 dB model 732A)
Alarm function: “OVER” is when input is more than the upper limit of range.
“ UNDER ” is when input is less than the lower limit of range.
MAX/MIN hold: Holds readings the Maximum and Minimum Value.
AC output: 1 Vrms at FS (full scale).
Output impedance: Approx. 100Ω
FS: means the upper limit of each level range.
DC output: 10mV / dB, output impedance approx. 1KΩ
Power supply: One 9V battery, 006P or IEC 6F22 or NEDA 1604.
Power life: About 50hrs (alkaline battery)
AC adapter: Voltage 9 VDC, center pin negative, (8-15VDC Max)
Supply current : > 30mADC
Socket : pin
→
Ground
Casing
→
Positive
External Diameter
→
3.5mm
Internal Diameter
→
1.35mm
Electromagnetic Compatibility:
RF field = 3V/m
2
Total accuracy = specified accuracy + 0.5dB
Operation temperature: 0 to 40°C (32° to 104°F)
Operation humidity: 10° to 90%RH
Storage temperature: -10° to 60°C (14° to 140°F)
Storage humidity: 10 to 75%RH
Dimensions (L x W x H): 10.8
×
2.5
×
1.2inch (275
×
64
×
30mm)
Weight: 285g (including battery)
Accessories: 9V battery, carrying case, Screwdriver, Instruction manual.
Windscreen, 3.5
ψ
plug, software & RS-232 cable (optional
model 732A).
Specifications and information subject to change without notice. Please visit
www.bkprecision.com
for the most current product information.
IV. NAME AND FUNCTIONS
9
1
2
3
A
C
6
SETUP
4
MAX
MIN
7
RS-232
5
CLOCK
INTV
8
DC 9V
CAL
FAST
SLOW
9V BATTERY
NEDA 1604 6F22 006P
REC
LEVEL
OUTPUT
PLEASE READ
MANUAL FOR SAFETY
Lo =
Med=
Hi =
Auto=
30
50
80
30
80 dB
100 dB
130 dB
130 dB
POWER-UP OPTIONS
OPEN
3
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