Velleman DVM8852 - Manual (Page 6)

DVM8852
02 (22/08/2013) 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: 100Ω
Y DC output voltage: 10mV/dB
impedance: 1kΩ
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.