multicomp pro MP780859 User manual

Sound Level Meter
MP780859
1. Safety information
Read the following safety information carefully before attempting to operate or service
the meter, and please use the meter as specified in this manual
Environment conditions
1. Altitude below 2000 meters
2. Relatively humidity 90% max.
3. Operation Ambient 0~40℃
Maintenance & Clearing
1. Repairs or servicing not covered in this manual should only be
performed by qualified personnel.
2. Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this
instruments.
2. General Description
This Sound Level Meter is designed to meet the measurement requirements of Noise
engineering, sound quality control, Health, Industrial safety offices in various environments.
Such as factory, school, office and traffic lines.
MAX/MIN measurement
Over range indicate
Low range indicate
A & C weighting selection
Bluetooth communication

3. Meter Description
1-LCD Display
2-Body of Meter
3-Microphone
4-HOLD/ button
5-MAX/MIN button
6-Power on/off button
7-UNITS button
8-Bluetooth button
4. Button Description
Power on/off, Auto-power off:
Power on: Short press button “ ” to power on, system default auto power off. Long
press to power on and disable auto power off function. Long press the button again to
enable the auto power off function
Power off: Short press button “ ” to power off.
Auto-power off: Auto-power off signal“ ”displays in the left coner of LCD and the
instrument will auto-power off in 10minutes of no button operations.
If press the power on/off button for over 1minutes, it will be recognized as faulty operation
and the instrument will auto power off.
RANG/(A/C) button: Short press to switch range gear; Long press to switch unit.
Button: Long press to active or deactive Bluetooth.
HOLD/ button: Short press to hold the current data; Long press to activate or
deactivate backlight.
MAX/MIN button: Press to record Maximum, Minimum
Note: MAX/MIN button, range button andA/C button will be deactivated when hold the
current readings and the instrument will exit MAX/MIN recording function when switch
range gear.
5. Display Layout
: Bluetooth symbol
: Low battery indicate
: Timing power off symbol
MAX: Maximum hold
MIN: Minimum hold
Two smaller digits at upper left of display: Minimum range
Three smaller digits at upper right of display: Maximum range
UNDER: under range
OVER: over range
dBA, dBC: A-weighting, C-weighting.
AUTO: Auto range selection
HOLD: Data hold function
Four larger digits in middle of display: Measurement data.

Measurement Operation
Turn on the instrument by pressing power on/off button.
Short press button ”RANGE” and select suitable measurement range based on
no ”UNDER” or “OVER” display on LCD.
Select ‘dBA’ for general noise sound level and ‘dBC’ for measuring sound level of
acoustic material.
Hold the instrument in hand or fix it on tripod, take measure at a distance of 1~1.5
meters between microphone and source.
Data Hold
Press hold button to freeze the readings and “HOLD” symbol displayed on LCD. Press
hold button again to return normal measurement.
MAX/MIN reading
Press MAX/MIN button for the first time, the instrument will enter Max tracking mode,
the tracked max reading will display on the LCD.
Press MAX/MIN button for the second time, the instrument will enter Min tracking
mode, the tracked min reading will display on the LCD.
Press MAX/MIN button for the third time, the current reading will display on the LCD.
Bluetooth communication
Long press Bluetooth button to activate Bluetooth function, it communicates after
connect with the software. The instrument can transmit measured datas and instrument
status to software and the software can control the instrument.
The instrument will automatically turn off in order to lengthen the battery working life.
When symbol appears on the LCD, please replace the old battery with new ones.
Open the battery compartment with a suitable screwdriver.
Replace 9V battery.
Replace the battery compartment again.
Meterbox Pro Operation Download Meterbox ProAPP to the smartphone before
using the Bluetooth communication function. Meterbox Pro APP is compatible with
instruments with Bluetooth: Laser Distance Meters, Multimeters Clamp Meters,
Multifunction Insulation Tester, Environment Meter etc.
The Meterbox Pro for Environment Meter detailed introduction please look at the help files
in GUIDE which is in the Environment Meter interface of Meterbox Pro.

6. Specifications
Frequency range:
31.5HZ~8KHZ
Accuracy:
3dB (under reference condition of 94dB, 1kHz）
Range:
35 ~ 130dB
Measuring range:
LO: 35dB~80dB Med: 50dB~100dB
Hi: 80dB~130dB Auto: 35dB~130dB
Frequency weighting:
A and C
Microphone:
1/2 inch electret condenser microphone
Digital display:
4 digits LCD display with a resolution: 0.1dB
Display Update:
2 times/ sec.
Auto power off:
Meter automatically shuts down after approx. 10
Minutes of inactivity.
Power supply:
One 9V battery
Low battery indication:
The low battery signal” ” flash when battery voltage
drops below 7.2V;
The backlight and low battery signal ” ”
flash twice when battery voltage drops
below 6.5V, then auto power off.
Operation temperature and humidity:
0℃~40℃，10％RH~90％RH
Storage temperature and temperature:
-10℃~+60℃，10％RH~75％RH
Weight:
184g
Dimensions:
185mmx54mmx36mm
7. NOTICE
Do not store or operate the instrument at high temperature and high humidity
environment.
When not in use for long time, please take out the battery to avoid battery liquid
leakage and cautery on the instrument.
When using the instrument outdoors, please mount the windscreen on microphone in
order to not pick up undesirable signals.
Keep microphone dry and avoid severe vibration.
INFORMATION ON WASTE DISPOSAL FOR CONSUMERS OF ELECTRICAL &
ELECTRONIC EQUIPMENT.
When this product has reached the end of its life it must be treated as Waste Electrical &
Electronic Equipment (WEEE). Any WEEE marked products must not be mixed with
general household waste, but kept separate for the treatment, recovery and recycling of
the materials used. Waste batteries can be returned to any waste battery recycling point
which are provided by most battery retailers. Contact your local authority for details of
recycling schemes in your area.
Made in China.
PO Box 13362 Dublin 2
LS12 2QQ