SVAN 948 USER MANUAL
.
4 - 40
4.4.1. 1/1 OCTAVE analyser of acoustic signal
In order to select the instrument’s acoustic mode the user has to enter the
CHANNELS SETUP
list
by pressing the
<MENU>
push-button, selecting by means of the
<
>
,
<
>
(or
<
>
,
<
>
) push-buttons
the
INPUT
text and pressing the
<ENTER>
, and then enter the
CHANNELS SETUP
the same way like in
previous and chose number of
CHANNEL
to configuration. In the
MODE
sub-list the user can select the
kind of input signal which has to be measured or analysed by the instrument. In the case of acoustic
signals the
SOUND METER
option should be selected Then by pressing
<
>
,
<
>
push-buttons user
has to change
SOUND
mode and press the
<ENTER>
push-button, which closes the
MODE
sub-list. The
MODE
sub-list is closed ignoring any changes made in it, after pressing in any time the
<ESC>
push-
button.
a)
b)
c)
The view of the displays in the CHANNEL x
(path: MENU / INPUT)
list
with the CHANNEL x text selected (a);
the VIBR. METER mode selected (b) and the SOUND METER mode selected (c)
The instrument’s operation as
1/1 OCTAVE
analyser is similar to the
SLM
measurement mode.
1. In
1/1 OCTAVE
analysis the spectrum is available in parallel to the
SLM
operation. All 15 digital pass-
band filters (with the centre frequencies from 16 kHz down to 1 Hz; in base two system) are working in
the real time with
the weighting filters: HP
,
LIN
,
A
or
C
selected in the
SPECTRUM
of the
1/1 OCTAVE SETUP
sub-list, user has to select number of
CHANNEL
to configure the filter
, and the
linear RMS detector
. Additionally, the
TOTAL
RMS values for the full frequency range with the
A
,
C
and
LIN
(
Z
) weightings are displayed. In order to inform the user about the working mode of the
instrument, in one profile and
3 PROFILES
modes of result’s presentation the
doted line
are used for
the indication that the instrument
do not work in
the
SLM
mode. In the
SLM
mode the continuous
lines are used.
The view of the displays in one profile and 3 PROFILES result’s presentation mode with the doted lines
indicating that the instrument do not work in the SLM mode
Notice:
The
TOTAL
RMS results are measured with the weighting filters:
A
,
C
and
LIN
without taking into account the setting of the
SLM
profiles. The
spectra are always linearly averaged
.
Thus, the
TOTAL
values from
1/1 OCTAVE
analysis can be different from those obtained for the
SLM
profiles (if the
RMS INTEGRATION
was set as
EXPONENTIAL
).
2. As
1/1 OCTAVE
analyser the instrument operates in two input ranges
105 dB
and
130 dB
, which can
be selected by means of the
RANGE
position.
In order to change the mode of the measurement results presentation the user has to press the
<
>
or the
<
>
push-buttons. The following modes are available:
One profile
,
3 PROFILES
,
SPECTRUM
,
STATISTICS
and
PLOT
.
Summary of Contents for SVAN 948
Page 1: ...SVAN 948 SOUND AND VIBRATION DATA LOGGER USER S MANUAL SVANTEK Sp z o o WARSAW June 2004...
Page 19: ...SVAN 948 USER MANUAL 2 6 The view of the rear panel of the SVAN 948 instrument in 1 1 scale...
Page 25: ...SVAN 948 USER MANUAL 3 6 Control diagram of the INPUT list...
Page 28: ...SVAN 948 USER MANUAL 3 9 Control diagram of the DISPLAY list...
Page 30: ...SVAN 948 USER MANUAL 3 11 Control diagram of the FILE list...
Page 32: ...SVAN 948 USER MANUAL 3 13 Control diagram of the AUX FUNCTION list...
Page 36: ...SVAN 948 USER MANUAL 3 17...
Page 37: ...SVAN 948 USER MANUAL 3 18 Control diagram of the SETUP list...
