Norsonic nor1216, Instruction Manual

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1 Norsonic Nor1216
Instruction Manual
1
Introduction
The outdoor microphone Nor1216 is a measurement
microphone for all-weather conditions. It is intended for
temporary as well as permanent outdoor applications.
The microphone contains elements for protecting the
microphone cartridge from rain and snow, dust and
insects, satisfying IP 55 requirements.
Further, compared to a standard measurement micro-
phone, the Nor1216 improves the measurement accu-
racy by reducing the wind noise and by improving the
directional response for sound from different directions.
Combined with a suitable sound level meter instrument
including a frequency response correcting function,
the Nor1216 satisfy Class 1 specification requirements
according to IEC61672-1 and similar national standards
for a sound level meter class 1.
The microphone is intended for vertical mounting only
since the act of gravitation forms a part of the rain
protection system. The reference direction may,
however, be selected to be vertical or horizontal based
on the applied frequency response compensation in
the sound level meter.
The outdoor microphone may be calibrated with
a normal sound calibrator suitable for ½” working
standard microphones (WS2) and without the need for
extra accessories. Access to the microphone cartridge
is easily gained by dismounting the upper part of the
outdoor microphone.
The base of the Nor1216 is made of an electrical insulat-
ing material. The microphone body will be fully insulated
from the mounting mast thereby reducing pick-up of
electrical hum and noise.
For verification of proper operation, the microphone is
equipped with a system check facility, where an electri-
cal signal applied on one of the terminals are returned
after passing through the complete signal chain, thus
verifying proper operation of the microphone cartridge,
preamplifier and microphone cable.
The Nor1216 is equipped with the standard 7-pin Lemo
connector for microphone preamplifiers. However, the
current consumption has been increased in order to
raise the temperature above the ambient. Nor1216
is mainly designed to be used with the Nor140 and
Nor150 Sound Analyser . These instruments have the
requested frequency compensation and deliver the
required current.
Please note that Nor140 instruments with serial number
lower than 1405079 may need to be upgraded in order
to deliver the required current. Contact your supplier for
further information.