Norsonic nor140, Instructional Manual

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Norsonic Nor140
Instruction Manual
Automatic storing of
data and noise
monitoring
Due to its large memory and the high dynamic range,
the Nor140 is well-suited for noise monitoring applica-
tions. Some installations, semi-permanent or perma-
nent, are based on tight computer control, while oth-
ers leave more of the job to the measuring instrument
itself. The Nor140 can be used with success in both
types of systems.
The Norsonic environmental solutions contain a
complete range of equipment and accessories for
environmental noise measurements and monitoring,
all the way from outdoor microphone units, via enclo-
sures and transmission cables to controlling and post-
processing software. A detailed presentation is avail-
able at www.norsonic.com.
Automated storage of measured data
The instrument can be set up to measure for a prede-
fined period in time and then store the measured data.
Once the data have been stored, the instrument may
start to measure for another period of the same dura-
tion and then store the acquired data, start again and
so on.
The snag, however, is that a little time will always be
spent on storing the acquired data. This means that if
you, for example, set up the instrument to measure in
periods of an hour and start the measurement exactly
on the hour, the measurement period start time will ex-
hibit a lag after some hours of measuring – typically
3–4 seconds per individual measurement.
If this lag is unacceptable for you, we recommend
that you use the synchro feature. When activated,
the synchro will stop the measurement slightly earlier
(some seconds) to give room for data storage and
housekeeping so that the measurement will start ex-
actly on the hour.
Available storage modes
The Nor140 will always operate in one of four available
storage modes. These are:
•
Manual
, which requires that acquired data are
stored manually by the operator before the next
measurement is made
•
Automatic
, which causes the acquired data to be
stored automatically upon measurement termina-
tion, regardless of the reason for termination – irre-
spective of whether termination took place because
the duration expired or because you pressed stop.