Norsonic nor118, Instruction Manual

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78 Chapter 16
Noise monitoring
79 Norsonic Nor118
User Guide
Noise
monitoring
D
     and the high dynamic
range, the Nor is well-suited for noise monitoring
applications. Some installations, semi-permanent or per-
manent, are based on tight computer control, while others
leave more of the job to the measuring instrument itself.
e Nor118 can be used with success in both types of
systems.
e Norsonic environmental solutions contain a com-
plete range of equipment and accessories for environmental
noise measurements and monitoring, all the way from
outdoor microphone units, via enclosures and transmis-
sion cables to controlling and post-processing software. A
detailed presentation is available on www.norsonic.com.
Automated storage of measured data
e Nor118 can be set up to measure for a predefined
period in time and then store the measured data. Once
the data have been stored, the instrument will start to
measure for another period of the same duration and then
store the acquired data, start again and so on.
e snag, however, is that a little time will always be
spent on storing the acquired data. is 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 exhibit a
lag after some hours of measuring – typically – 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 ( seconds to be
exact!) to give room for data storage and housekeeping so
that the measurement will start exactly on the hour.
Available storage modes
e Nor118 will always operate in one of four available
storage modes. ese are:
• M, which requires that acquired data are stored
manually by the operator before the next measurement
is made
• A, which causes the acquired data to be
stored automatically upon measurement termination,
regardless of the reason for termination – irrespective