SVAN 948 USER MANUAL
4 - 1
4. MEASUREMENT FUNCTIONS OF THE INSTRUMENT
The
SVAN 948
is a unique pocket 4-channels instrument combining functions of a
sound level
meter
(SLM), with the Type 1 accuracy (according to IEC 651, IEC 804 and IEC 61672-1 standards), a
vibration level meter
(VLM),
1/1 OCTAVE
and
1/3 OCTAVE
real time analyser in which in parallel
operate the digital pass-band filters. The values of the central frequencies of these filters are defined in
the sequence conforming to the base two system. All 1/1 octave & 1/3 octave filters are Type 1 (according
to IEC 1260 standard).
The narrow-band frequency analysis (
FFT
) is also available in this instrument as option.
Thanks to the application of the state of digital signal processing, in the instrument works in
four
independent sound / vibration level meters channels, so-called
here
channels
, which perform the
measurement of the signal with the selectable combination of:
•
A
,
C
,
LIN (Z)
(conforming to IEC 61672-1 standard) weighting filters and
SLOW
,
FAST
or
IMPULSE
RMS detectors - in the case of sound and
•
HP1
,
HP3
,
HP10
,
W–Bxy
,
W–Bz
,
H–A
,
W–Bc
,
KB
,
Wk
,
Wd
,
Wc
or
Wj
weighting filters and
100 ms
,
125 ms
,
200 ms
,
500 ms
,
1 s
,
2 s
,
5 s
or
10 s
RMS detectors - in the case of vibration.
1/1 OCTAVE, 1/3 OCTAVE or FFT analyser works simultaneously with
the mentioned above
channels
.
In the case of acoustic signal the measurement of
SPL, LEQ, SEL, Ld(en)
(depending on the
period of the measurement
d
-day
,
e
-evening
,
n
-night
the different abbreviations of the function name are
displayed),
Ltm3, Ltm5, LN
(statistics),
PEAK
,
MAX
,
MIN
and
time history
are performed simultaneously
in all channels (cf. Appendix D.1.1 for the definitions).
In the case of vibration signal the measurement of
RMS
,
VDV
,
PEAK
,
P–P
,
MTVV
,
MAX
and
time
history
are performed simultaneously in all channels (cf. Appendix D.1.2 for the definitions).
The measurement results can be presented on the display of the instrument in the different ways
depending on the selected function and the setting of the parameters. In the case of the sound / vibration
level meter the following display modes (the ways of the measurement results presentation) are available:
•
One Profile,
3 PROFILES
,
STATISTICS
and
PLOT
.
•
In the case of
1/1 OCTAVE
,
1/3 OCTAVE
or
FFT analysis
the possibility of the spectra
presentation is also available (
SPECTRUM
mode).
•
The
selection of the display mode
is made by pressing the
<
>
or
<
>
push-button.
•
The
switching between the channels
is possible by pressing the
<SHIFT>
and
<
>
or
<SHIFT>
and
<
>
push-buttons (in one profile,
4 PROFILES
or
STATISTICS
modes).
•
The
switching between the results in the selected channel
is made by pressing the
<
>
,
<
>
push-buttons (in one profile or
3 PROFILES
modes).
•
The
changing of the statistics class
(statistics are available only for sound measurements),
1/1 octave
or
1/3 octave filter
, the
FFT line
and the
value in the buffer
is done by pressing the
<
>
,
<
>
push-buttons (the movement of the cursor in
STATISTICS
,
SPECTRUM
and
PLOT
modes).
•
The pressing of the
<SHIFT>
and
<
>
or
<SHIFT>
and
<
>
push-buttons enables the user to
change the relation between the vertical and horizontal axis
for the
SPECTRUM
and
PLOT
modes of result’s presentations.
•
In the case of
1/1 OCTAVE
or
1/3 OCTAVE
analysis mode of
acoustic signal
, pressing the
<ENTER>
push-button in the
SPECTRUM
mode of result’s presentation enables the user to
observe on the display the statistical analysis performed for the selected
1/1 OCTAVE
or
1/3 OCTAVE
filter. The return to the
SPECTRUM
mode is made after pressing the
<ESC>
push-button. The statistical analysis is not performed for the vibration signal, so nothing occurs
in this mode after pressing
<ENTER>
push-button in the
SPECTRUM
mode of result’s
presentation.
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...
