Norsonic nor140, Instructional Manual

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Norsonic Nor140
Instruction Manual
Functions to log – setup menu
Setup menu with multiple time constant option (left) and
without the multiple time constant option (right)
Use
the
NETW
key
to gain access to
the C/Z-weighted
functions and the
fi lter band func-
tions as well
Are you going to use C- or Z-weighting
as spectral weighting function?
This is set
up in the 2nd network menu – press
SETUP
>1
(Instr.)
>5
(2nd netw) and navigate as usual.
To set up for multispectrum measurements
(enhanced time profi le):
1
Set up the duration and resolution
2
To gain access to the profi le function activation
menu, press
SETUP > 3
[L(t) par.]. This menu looks
as shown below.
Use the
NETW
key to switch between A-weighted
functions, the C-/Z-weighted functions
and
the fi lter
band functions. Remember that the fi lter functions
must be turned on (using
SETUP > 4
) before they can
be selected in this menu. If you fail to activate func-
tions for the fi lter bands, there will be no multispectrum
data, either.
Making multispectrum measurements
Multispectrum measurements are made in the same
way as ordinary time profi le measurements. The only
difference lies in the fact that the multispectrum meas-
urements log the spectrum as a function of time and
not just the broadband values.
To go between level vs. time and level vs. frequency:
1
Make sure the instrument is in profi le mode (a Δ dis-
played in the upper left corner of the display). If not,
press the
Σ↔Δ
key to enter profi le mode.
2
Use the
f
↔
t
key to go between display of level vs.
time and level vs. frequency.
To move the cursor along the frequency axis:
1
Make sure the display shows the spectrum.
If needed, use the
f
↔
t
key.
2
Use the and the keys to move the cursor along
the frequency axis.
3
Use the and the keys to move the cursor to
either extremes of the spectrum.
3
Navigate in the menu as usual and use the
INC
and
DEC
keys to activate the functions required for your
task. Deactivate those that you won’t need. A ”1”
means activated and a “0” means deactivated.
This menu is used to activate/deactivate:
• the A-weighted functions to be measured
• the C- or Z-weighted functions to be measured
• the fi lter band functions to be measured