6 Copyright ©Sigicom AB 2018
1.2
Features
INFRA S51 Sound Level Meter simultaneously measures both
maximum and equivalent sound pressure level. It meets the class 1
requirements of the standards:
•
ANSI S1.4-1983 (R2006), S1.4a-1985 (R2006)
•
ANSI S1.43-1997 (R2007)
•
IEC 61672-1:2013
•
ISO 7196:1995
INFRA S51 Sound Level Meter offers the following features:
•
Full integration with INFRA Field Monitoring System
which makes it possible to combine the sound level meter
with geophones (vibration) and a numerous of other sensor
types.
•
Interval and transient data are recorded in the Datalogger
(e.g. INFRA Master, Mini or Micro) and can be
automatically sent with for example GPRS to the database.
•
Possibility to connect more than one sound level meter to
each Datalogger.
•
Selectable time interval of the interval data.
•
A trigger level for recording a sound clip (transient) with up
to 10 seconds duration can optionally be set. The one
second period just before the trig (named pre-trig) is always
included in the sound clip.
•
Possibility (within INFRA software tools) to listen to the
sound clip, in order to identify the source of the noise.
•
Possibility in post processing to apply frequency analysis of
the sound clip (e.g. third octave) up to 1250 Hz. This can be
done with a user selected weighting filtering.
•
Simultaneous measuring in two channels: MAX or PEAK
(L
max
/L
peak
), and equivalent sound pressure level (L
eq
).
•
Frequency weighting: A, C or G.
•
Time weighting: SLOW (1s), FAST (0.125s) or PEAK
detectors.
•
A number of level ranges.
•
A red LED for overload indication.
