Norsonic nor140, Instructional Manual

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23
Norsonic Nor140
Instruction Manual
What can be done to the measured data?
Data acquired are available for inspection,
during or after a measurement.
You may:
• Display the functions measured
• Display the result table
• Change the spectral weighting function
between
A
- and
C
- or
Z
-weighting
• Display the eight percentiles and set one of
them as you like
• Store them for future use
Making a measurement
To start a measurement:
• Press the
START
key. The
R
in the display indicates
that a measurement is running.
To temporarily halt an ongoing measurement:
• Press the
PAUSE/CONT
key.
To resume a paused measurement:
• Press the
PAUSE/CONT
key again. Upon resuming
the instrument will go on measuring until the total
measurement time elapsed equals the preset dura-
tion. Observe that data acquired immediately pre-
ceding the pause may be erased because of the
back-erase function (see below).
To terminate an ongoing measurement:
• Press the
STOP
key.
To resume a terminated measurement:
• To resume a terminated measurement press the
PAUSE/CONT
key. Upon resuming the instrument
will go on measuring until the total measurement
time elapsed equals the preset duration. When a
terminated measurement is resumed, the back-
erase feature (see below) will
not
be activated.
To switch between absolute and relative time:
• To switch between time elapsed since start of
measurement (relative time) and date + time of day
(absolute time), use the
ABS t
key.
To display other functions measured:
• Use the
FUNC
key. For the German-speaking
markets these functions will include L
eqI
and T
Max5.
To adjust the display top scale:
• If the bar graph fails to match the level measured
use the
INC
and
DEC
keys to alter the display top
scale setting.
To switch between the spectral weighting functions:
• Use the
NETW
key to switch between A-weighted
and C- or Z-weighted or the A-weighted and the
C-A (Z-A) weighted functions.
To produce the results in tabulated form:
• Press
TBL
to produce a result table. See
Displaying
the result tables
for more on this.