Norsonic nor1217, Инструкция по эксплуатации

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18 Chapter 7
Specification
Specifications
Mounting direction
The microphone shall be mounted with the tip pointing
upwards and the axis of symmetry shall be vertical.
The acoustic reference axis for the microphone may
either be horizontal or vertical.
Acoustic performance
General
Sensitivity: typically 50 mV/Pa (-26 dB re 1V/Pa) –
individually calibrated.
Measurement range:
From noise floor up to at least
140 dB re. 20 µPa (peak). Up to 150 dB peak for
Nor1225 and “high level” option in Nor140.
Self-noise:
A-weighted: < 18 dB re. 20 µPa
Z-weighted: < 22 dB re 20 µPa (22.5 Hz - 22.5 kHz)
Frequency response
See Technical description.
Frequency correction is recommended for conform-
ance with the requirements in IEC 61672 for class 1
sound level meters.
Directional response
The directional response satisfies the requirements for
a Class 1 sound level meter according to IEC61672-1.
See section 4.4 Directional response for further infor-
mation.
General
Mounting on a tripod:
3/8” UNC (photo-tripod)
Temperature range: -40ºC to +85ºC
Satisfies requirements in IEC 61672-1 when operated
with a suitable instrument.
Air pressure: 85 kPa to 108 kPa
Humidity/rain:
Up to 100%, IP55
Height:
375 mm (without tripod adapter)
Diameter:
Approx 78 mm with windshield
Weight: 280 g (without tripod adapter)