DAPAudio 91004 User manual

DIGITAL SOUND LEVEL METER
USER MANUAL
fonometro

1
read this first
With this meter you have bought a very fine,
versatile and precise measuring tool that
allows you to measure sound pressure levels
in a wide range. Please be aware that this
measuring instrument, however precise, is not
to be used for purposes other than indicating
a sound presure level. No legal proof can be
aquired with this instrument nor can the
manufacturer or distributor of this instrument
be made responsible for any claims originating
from using this tool as a measuring instrument.
This measuring instrument is capable of
indicating very high sound levels, that is, up to
130dB. When being exposed to such sound
levels, even for short periods of time, it is
important to protect your ears. At the same
time protection should be weared at lower
sound pressure levels when exposed to sound
for longer periods. Please study adequate
literature as this is beyond the responsablity of
the manufacturer or distributor of this
measuring instrument.
The sound level meter works on batteries or
an external power adapter. The power
adapter is not included but the batteries are.
There are 6 pcs. of 1,5 Volt AAA model
battery included. When not using the
meassuring instrument for a longer period,
please remove the batteries from the device
to avoid damage to the device caused by
leakage of the batteries.

general
2
As it says in the name, this is a "sound level
meter" that is, it will indicate the sound level
as it is perceived by the human ear. Therefore
the measured sound is filtered using a curve
that mimes the sensivity of the human ear.
The International Electrotechnical Commission
(IEC) has defined several weighting schemes
that are layed down in a standard called ANSI
S1.1-1994 The curve used to match the
human ear is called A-curve. This curve is
used in the sound level meter by default.
When wanting to measure peak sound levels
the device should be switched to use the C-
curve.
LCD display
• Analog bar indicator
• Wide dynamic range
• Auto / manual range
• Fast / Slow response selectable
• Max. value Hold function
• A / C weighting selection
• Date and time display
• AC / DC auxiliary output
• Backlight
• Low power indication
Measurement range: 30 dB - 130 dB
Accuracy: +/-2 dB
Resolution: 0,1 dB
Sample rate: 2 times/s
Frequency range: 20 Hz - 8 kHz

3
1
2
3
4
5
6

4
functions
On the digital sound level meter there are the
following controls:
1) on/off switch. Turn on the measuring device by
pressing this button. Pressing it again will turn off
the device
2) max button. will freeze the display reading to
the maximum level, measured since this button
was pressed. The reading will be updated when
the indicated value is surpassed.
3) up and down arrow buttons. will increase or
decrease the measuring range in 6 steps where
each step covers a range of 50dB. a next step will
set the measuring range to the total of 30 - 130 dB
4) A/C. switches between A-curve and C-curve
5) light button. will turn on and off a backlight in
the display to facilitate reading in a dark
environment.
6) fast / slow. switches between indicating an
average level measured during a time interval of
5 mili-second or 500 mili-second

5
use
First make sure there are charged batteries in
the sound level meter. There are 6 batteries
included in the packing. When inserting the
batteries, please pay attention to the polarity.
The position of each battery is indicated on
the bottom of the battery compartment.
Switch on the sound level meter. The device
should now show figures on it's display. On
that display you can read the sound level in
dB ( deci-Bell ). With that value is indicated
wether the measurement is filtered following
the A-curve or C-curve. Next there is the
indication "dB". Above this reading, time is
indicated.
In the top of the display there is a scale
showing the average sound level between the
values indicated at the ends of that scale the
range of wich can be changed by pressing the
yellow up and down buttons. Finally in the
top-right corner is indicated wether the unit
will integrate the measured value in a short or
longer period of time.
The device will show a reading in deci-Bell, A-
weighted. When the noise level to be
measured will be out of range, the words
"under" or "over" will appear over the values
that indicate the measuring-range at the ends
of the scale. The range can be adjusted by
pressing the yellow up and down buttons.

6
setup
When switchin on the device, it's clock will
probably not run at the correct time. To adjust
this clock please proceed as follows: Switch
off the unit. While holding pressed the MAX
button, switch the unit on again by pressing
the on/off button. Now only the clock
reading will appear on the display while the
indication of the seconds will be blinking.
Use the yellow arrowbuttons to increase or
decreas the seconds reading. Next press the
MAX button to toggle to the minutes reading
that will now be blinking. Adjust the minutes
and Toggle to the hour reading by pressing
the MAX button again. Please note that the
clock will indicate in 24 hour mode. Pressing
the MAX button again will change the display
to indicating the date with the day blinking to
be adjusted. Next the month and finally the
year. To return to the normal wordking
mode, switch the unit off and on again.

DAP is a registered brandname of
Highlite International BV
Vestastraat 2
6468 EX KERKRADE
the Netherlands
http://www.highlite.nl
91004
DOCUMENT: 91004_MANUAL_GB_0808V01