Norsonic nor140, Instructional Manual, Page: 67 / 220

49
Norsonic Nor140
Instruction Manual
Option 7 permits the time resolution
to be as low as 25 ms. See text for details
Here the resolution
is set to 125 ms
The time constant cannot be set from
inside the L(t) par menu
! Instruments
which are not equipped with multiple time
constants will make use of the time constant cur-
rently selected. If this is not the one you want to use
for your profile measurements, you must change it.
This cannot be done from within the L(t) par menu.
Leave the menu and change the time constant by
means of the
TC
key.
Functions like L
eq
, L
MAX
, L
MIN
and L
PEAK
are measured
during each period. The SPL, however, is sampled at
the end of each period.
Copy the setting to Prnt/Xfer
Upon leaving the functions to log menu you will be
prompted to decide whether the settings you made
shall apply to the functions to print or transfer
In order to avoid being totally drowned in values,
you may set up instrument to just print a few of the
functions measured. However, for convenience we
offer the feature of setting up the same functions for
printing as for measurement. If you then want to print
fewer functions, just go to the print functions setup
menu and deactivate those you won’t need.
To produce the print functions setup menu:
• Press
SETUP
>
1
>
9
>
1
Functions to be printed are denoted by a “1”.
The same applies to the transfer of measured function
values to your PC. You may not want to have all the
data transferred, so you can set up which functions
whose values you want to transfer.
To produce the transfer functions setup menu:
• Press
SETUP
>
1
>
9
>
2
Setting the time resolution
To define the duration and the resolution:
1 Press
SETUP > 2
. Units with the option 6 installed
will then produce the measurement duration menu.
See side bar for details.
2
Set the global duration.
3
Move down to resolution and set as required.
Navigate and leave the menu as usual.
If you have set up a profile resolution different from
(i.e. shorter than) the global measurement duration,
the instrument will log the time profile in addition to the
global measurement.