Velleman DEM202 User manual

DEM202
PROFESSIONAL SOUND LEVEL METER WITH DATALOGGER
PROFESSIONELE GELUIDSNIVEAUMETER MET DATALOGGER
SONOMÈTRE PROFESSIONNEL AVEC ENREGISTREUR DE
DONNÉES
PROFESSIONELLES SCHALLPEGELMESSGERÄT MIT
DATENLOGGER
SONÓMETRO PROFESIONAL CON REGISTRADOR DE DATOS
PROFESJONALNY MIERNIK POZIOMU DŹWIĘKU Z
REJESTRACJĄ DANYCH
MEDIDOR PROFISSIONAL DO NÍVEL DE SOM COM COLETOR
DE DADOS
USER MANUAL 3
GEBRUIKERSHANDLEIDING 11
MODE D'EMPLOI 19
MANUAL DEL USUARIO 27
BEDIENUNGSANLEITUNG 35
INSTRUKCJA OBSŁUGI 44
MANUAL DO UTILIZADOR 53

DEM202
V. 04 –17/10/2016 2 ©Velleman nv

DEM202
V. 04 –17/10/2016 3 ©Velleman nv
USER MANUAL
1. Introduction
To all residents of the European Union
Important environmental information about this product
This symbol on the device or the package indicates that disposal
of the device after its lifecycle could harm the environment. Do
not dispose of the unit (or batteries) as unsorted municipal waste;
it should be taken to a specialized company for recycling. This
device should be returned to your distributor or to a local
recycling service. Respect the local environmental rules.
If in doubt, contact your local waste disposal authorities.
Thank you for choosing Velleman! Please read the manual thoroughly before
bringing this device into service. If the device was damaged in transit, do
not install or use it and contact your dealer.
2. Safety Instructions
Keep this device away from children and unauthorized
users.
Keep this device away from rain, moisture, splashing and
dripping liquids.
Protect this device from shocks and abuse. Avoid brute
force when operating the device.
Protect the device against extreme heat and dust.
There are no user-serviceable parts inside the device.
Refer to an authorized dealer for service and/or spare
parts.
3. General Guidelines
Refer to the Velleman® Service and Quality Warranty on the last pages
of this manual.
Familiarise yourself with the functions of the device before actually
using it.
All modifications of the device are forbidden.
Only use the device for its intended purpose. Using the device in an
unauthorised way will void the warranty.

DEM202
V. 04 –17/10/2016 4 ©Velleman nv
4. Features
normal and peak mode
max and min measurements
over-range display
manual and automatic start mode
A and C weighting
fast and slow response
analogue AC/DC outputs for connection to frequency analyzer or X-Y
shaft recorder
PC real-time monitoring and recording
datalogger function
memory up to 262144 readings
5. Overview
Refer to the illustrations on page 2 of this manual.
1
windscreen
10
response time button
2
microphone
11
setting button
3
LCD display
12
sound level calibration
4
A/C weighing button
13
earphone socket
5
backlight button
14
USB socket
6
data hold button
15
external power supply
7
range button
16
dustproof cover
8
on-off button
17
tripod socket
9
MIN/MAX button
18
battery compartment
Display
MAX
maximum recorded value
MIN
minimum recorded value
OVER
input value is higher than upper limit
UNDER
input value is lower than lower limit
FAST
fast response mode
SLOW
slow response mode
dBA
A weighing frequency
dBC
C weighing frequency
88 ~ 188
range display
TIME
current time
DATE
current date
AUTO
auto range selection
HOLD
data hold
REC
data recording
FULL
full memory

DEM202
V. 04 –17/10/2016 5 ©Velleman nv
auto power-off
battery level
real-time communication
6. Battery
1. To replace the battery, make sure the device is switched off.
2. Open the battery compartment at the back using an appropriate
screwdriver.
3. Take out the old battery and replace with a new and identical 9 V
battery following the polarity markings inside the compartment.
4. Close the battery compartment.
Warning: Do not puncture batteries or throw them in fire as they
may explode. Do not attempt to recharge non-rechargeable
batteries (alkaline). Dispose of batteries in accordance with local
regulations. Keep batteries away from children.
7. Operation
7.1 Basic Operation
1. Press the on-off button for 1 second to switch on the meter.
2. Briefly press the backlight button to switch the backlight on or off.
3. Press the A/C weighing button to select the A or C weighing frequency.
4. Press the fast/slow button to select the fast (1 sample/125 ms) or slow
(1 sample/1 s) weighing mode.
5. Press the range level button to select the range level.
6. Aim the microphone to the sound source at a distance of 1 to 1.5 m.
The sound level appears on the display.
7. Briefly press the data hold button to freeze the reading on the display.
Press again to unfreeze.
8. Press the MIN/MAX button to display the recorded maximum value,
briefly press to display the recorded minimum value, press again to
exit the function.
9. Press the on-off button for 3 seconds to switch off the meter.
7.2 Setting Date and Time
1. To enter the date and time setting mode, hold the setting button
pressed while switching on the meter.
2. Set the time and date with the up/down button, go to the next item
with the setting button.

DEM202
V. 04 –17/10/2016 6 ©Velleman nv
3. Press the data hold button to confirm and to exit the mode.
4. In normal mode, press the setting button to toggle between time and
date display.
7.3 Recording
1. In normal mode, hold the setting button pressed for 3 seconds to enter
the recording mode.
2. The meter starts recording automatically and stops when the memory
is full.
3. Clear the memory before recording again, as recording cannot be
resumed as long as memory is full. Go to the 8.5 Datalogger section
below for more information.
4. Hold the setting button pressed for 3 seconds to exit the recording mode.
Remarks:
It is advisable to use the external power supply to avoid the meter from
switching off due to a drained battery.
7.4 Calibration
1. Select the A-weighing frequency, fast sampling rate and a level range
from 50 to 100 dB.
2. Carefully insert the microphone into the calibrator (not included).
3. Calibrate the microphone to 94 dB through the CALL potentiometer. To
do so, use the included calibration tool.
Remarks:
It is advised to calibrate the meter once a year.
8. Software
8.1 Installation
1. Insert the included CD into the CD-ROM drive of your computer. The
software will auto-run. If not, double-click the setup.exe file.
2. Follow the installation steps and install the software.
8.2 Introduction
1. Click on the software icon to run the software.
2. Connect the meter to the PC using the included USB cable.
3. After having started up the software, the menu and toolbar appear.

DEM202
V. 04 –17/10/2016 7 ©Velleman nv
open a saved data file
save a data file
settings
time setting
start real-time data recording
stop real-time data recording
connection with user’s PC
disconnection from user’s PC
upload the recorded data onto the user’s PC
4. Click the connection icon to connect the meter to your PC.
5. To use the software correctly, it is advised to synchronize both the
date and time on the meter and on the PC. To do so, click the time
setting icon.
8.3 Real-Time Recording
Start
measurement starting time
End
measurement ending time
File
data list with recorded files
MAX
maximum recorded value
MIN
minimum recorded value
Unit
measurement unit
Data NO.
data number
SampleRate(s)
sample rate
Average
average recorded value
High Alarm
upper limit alarm
Low Alarm
lower limit alarm
Start Name
file name

DEM202
V. 04 –17/10/2016 8 ©Velleman nv
8.4 A/B Graph
Detailed view of the recorded values is done with
markers. These markers limit the value range, which in
turn can be enlarged and viewed in detail. To determine
the markers:
1. Go to the markers window and select the A marker
by clicking it. The selected marker will be
highlighted in yellow.
2. Place the mouse cursor at the starting point in the
graph window and left-click to set the marker. Click
the diamond button to move your marker.
3. Do the same for marker B and set the ending time.
4. Detailed values are displayed in the bottom left-
hand corner of the screen.

DEM202
V. 04 –17/10/2016 9 ©Velleman nv
8.5 Datalogger
Setup
Set the sample rate, date and time. Other options can be set the same as
the default settings.
Download
Upload the recorded data from the meter to your PC.
Clearing the Memory
Clear the recorded data in the meter. All data will be permanently erased, so
you might want to upload the data to your PC first.
Remarks:
To save battery, click the disconnection icon to disconnect the meter
after use and switch off the meter.
9. Cleaning and Maintenance
Wipe the device regularly with a moist, lint-free cloth. Do not use
alcohol or solvents. DO NOT submerge the device in any liquid.
Store the meter in a dry place away from humidity and vibrations.
Remove the battery when the meter is to be stored for long periods of
time.

DEM202
V. 04 –17/10/2016 10 ©Velleman nv
10. Technical Specifications
accuracy
± 1.4 dB
frequency range
31.5 Hz to 8 kHz
dynamic range
50 dB
measuring range
30 dB to 130 dB
data memory (measuring points)
262144
sampling rate
2x / sec.
frequency weighting
A, C
time weighting
fast
125 ms
slow
1 s
microphone
1/2" electret condenser microphone
data output
USB
power supply
1x 9 V battery 6F22 (incl.)
optional power supply
PSSMV1 9 V, 1.3 A
connector: 1.35 x 3.5 mm
operation temperature/humidity
-20° C ~ 60° C (-4° F ~ 140° F)
10 % ~ 90 % RH
operating altitude
< 2000 m
storage temperature/humidity
-20° C ~ 60° C (-4° F ~ 140° F)
10 % ~ 75 % RH
dimensions
252 x 66 x 33 mm
weight (with battery)
258 g
Use this device with original accessories only. Velleman nv cannot
be held responsible in the event of damage or injury resulting from
(incorrect) use of this device. For more info concerning this product
and the latest version of this manual, please visit our website
www.velleman.eu. The information in this manual is subject to
change without prior notice.
© COPYRIGHT NOTICE
The copyright to this manual is owned by Velleman nv. All
worldwide rights reserved. No part of this manual may be copied,
reproduced, translated or reduced to any electronic medium or otherwise
without the prior written consent of the copyright holder.