DVM8852
00 (04/11/2008)
Velleman
®
6
•
The meter has two operational modes, fast or slow. In fast mode, sound is sampled every
125ms; in slow mode every second. Select fast or slow mode with the mode select button
[E]
.
Selected mode is indicated in the display,
[5]
or
[6]
. Note that the display itself is updated 2
times per second.
•
There are two weighing schemes available on the meter: A-weighted (dBA) and C-weighted
(dBC):
dBA
: sound pressure adjusted towards the frequency range of human hearing
dBC
: sound pressure adjusted towards the low frequency end of the spectrum
Select the desired scheme with the signal weighing select button
[F]
, the scheme is indicated on
the display
[18]
or
[19]
.
•
Press the hold button
[J]
to freeze the current measurement on the display. Hold mode is
indicated on the display
[21]
. Press the hold button
[J]
again to exit hold mode.
•
Press the max/min capture button
[G]
to continuously display the maximum measured value,
display indicates
MAX [3]
. Press the max/min capture button
[G]
again to continuously display
the minimum measured value, display indicates
MIN [4]
. Pressing the max/min capture button
[G]
again will show the current noise pressure level again.
•
Press the backlight button
[K]
to switch the backlight on and off.
•
The auto-power off mode indication
[14]
is shown when auto-power off is enabled. The meter
switches off after ±15 minutes of user inactivity. To disable the auto-power off function, press
the setup button
[D]
.
•
To switch off the meter, press and hold the power on/off button
[I]
for about 3 seconds (display
shows countdown).
•
The meter can be used handheld or mounted on the included tripod. Screw the tripod into the
mounting hole
[P]
on the back of the meter.
Note:
the AC/DC output jack can be used to connect other devices e.g. frequency analyzer (not
incl.), plotter (not incl.) …
X
AC output
voltage: 1Vrms/range step
impedance: 100
Ω
Y
DC output voltage: 10mV/dB
impedance: 1k
Ω
Z
Ground
Time/date setting
•
If the meter is on, switch it off first.
•
Press and hold the setup button
[D]
while switching on the meter with the power on/off button
[I]
. Release the setup button
[D]
when
TIME [12]
is displayed. The display now shows the
date.
•
Pressing the setup button
[D]
to enter the setup menu. Press the setup button
[D]
to save the
setting and go to the next setup entry. Press the hold button
[J]
at any time to save the setting
and exit setup mode.
Press #
Display
1
minutes
TIME
n n
set the minutes by pressing the range/level select button
[H]
2
hour
TIME
h-A
or
h-P
set the hour by pressing the range/level select button
[H]
A
=ante meridiem (before noon),
P
=post meridiem (after noon)
3 DATE
–d-
day
set the day of the month by pressing the range/level select button
[H]
4
DATE –H-
month
set the month by pressing the range/level select button
[H]
5 DATE
–Y-
year
set the year by pressing the range/level select button
[H]
6 rSt
press the hold button
[J]
to reset date and time to factory default
Note:
the day is not shown on the display during normal operation. It can only be shown by going
into setup mode
Data logger function
•
During measurement, press the record start/stop button
[C]
to start recording the
measurement. Press again to stop recording. Recordings can be transferred to a computer (see
§7 Analysis).
•
To clear the memory, switch off the meter first. Press and hold the record start/stop button
[C]
while switching the meter back on. Release the record start/stop button
[C]
when the word
CLR
appears on the display.
Warning:
all recorded data in the meter is lost. Consider uploading the
memory content to a computer prior to clearing the memory.
