Benetech GM1351 Installation manual

Model: GM1351
Digital Sound Level Meter
Operation Manual
A. Introduction
This equipment has been designed to meet the
measurement requirement of Safety Engineers,
Health, Industrial Safety offices and Sound Quality
control in various environment which include factory,
office, traffic, family and audio system
This equipment has the following functions:
1 .It is designed according to the IEC651 TYPE2 &
ANSI S1.4 TYPE2
2. Modern, compact, portable design
3. Accuracy up to ±1.5 dB
4. Measurement range: 30dBA – 130 dBA
5. MAX Hold
6. Auto backlight display
7. Auto power OFF
B. Safety Notice:
Please use a Standard Acoustic Calibrator.
1 Turn on the calibrator and set up the status to
94dB@1KHz
2 Insert the microphone carefully into the ½ inch
hole of the Calibrator.
D. Name and functions (Figure 2)
(Page 1) (Page 2) (Page 3)
Operation Environment:
C. Calibration Procedures:
3 .Turn on the Calibrator and adjust the potentiometer
inside the battery compartment of the unit
(shown in the Figure1), until the LCD display the
desire level (94 dB)
**Our products are all well calibrated before shipment.
(Recommended recalibration cycle:1 Year.)
Maintenance:
Use dry cloth to clean the unit but never with any
solvent.
1. Electric Condenser Microphone.
2. LCD Display.
3. ON/OFF button
4. Maximum value hold button.(MAX)
5. Light sensor
6. Tripod mounting nut
7. Potentiometer
8. Windscreen
1. Below 2,000 meters height
2. Humidity <80% RH
3. Operation temperature: 0-40C.
Figure 1Figure 2
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E. LCD Display (Figure 3)
1 Low battery indication
2 Measuring value
3 Maximum value icon
4 Measuring unit: dBA
F. Pre-Operations:
Operating the unit：
1. Open the battery door and install 9V battery
into the battery compartment.
2. Cover the battery door.
3. When Low battery mark “ CD “ appears,
please replaced with a new 9V
battery.(Figure 4)
G. Operation
H. Caution
I. Specification
Measuring range 30dBA-130dBA
Accuracy ±1.5 dB ( 94 dB@1KHz )
Frequency range 31.5Hz – 8.5KHz
Frequency weighting A
Digital Display 4 digits
Resolution 0.1 dB
Sample rate 2Times/Second
Microphone ½ Inch Electric Condenser Microphone
Max Hold MAX
Power supply 9V Battery
Battery Life About 30hours (Alkaline Battery)
Operating Condition 0~40 10~80%RH
Storage condition: -10~60 10~70%RH
Weight 147.5g (including battery)
Dimension 153x101x43mm
MADEINCHINA
(Page 5) (Page 6)(Page 4)
1. Standard measure mode
Press “ “ turn on the unit full screen for
1 second current sound level.
The reading will changed according to the sound
level of the current environment.
2. Max hold
Press “ MAX “ to lock the maximum sound level, the
sound level will be locked until the higher value
appears to replace. Press “ MAX “ again to go back
the standard measure mode.
3. Auto backlight display
The light sensor will induct the light intensity of
environment automatically, when the light intensity
Is sufficient, the backlight will be turned on
automatically. It will changing according to the light
intensity.
4. Auto power off
This unit will shut off automatically in about
11 minutes.
To cancel this function, press “ “ continuously
“ UOF “ display on the LCD, the auto power off
function will be renewed in next turn on.
1. Do not operate the unit at high temperature and
high humidity environment.
2. Please take out battery from unit if not in use for
any extended period of time.
3. When using the unit in the presence Of wind,
Mount the windscreen to avoid to pick up
undesired signal
Figure 3
Figure 4
9V Battery
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