specifications Rion NC-72A Pistonphone
Applicable standards: IEC 60942:2003 (JIS C 1515:2004) “Electroacoustics – Sound Calibrators” Class LS/C (Class LS/C when using supplied barometer)
– Specified microphones
1-inch microphones: IEC 61094-1 Type LS1P compliant microphones. IEC 61094-4 Type WS1P/F/D compliant microphones. UC-25, UC-27, UC-34
1/2-inch microphones (using 1/2-inch adapter NC-72-S16): IEC 61094-1 Type LS2aP compliant microphones. IEC 61094-4 Type WS2P/F/D compliant microphones. UC-26, UC-28, UC-30, UC-31, UC-33P, UC-52, UC-53A, UC-57, UC-59, MS-10, MS-11
1/4-inch microphones (using 1/4-inch adapter NC-72-S06): IEC 61094-4 Type WS3P/F/D compliant microphones. UC-29, UC-54
– Reference conditions
Ambient temperature: 23°C
Static (atmospheric) pressure: 101.325 kPa
Relative humidity 50% RH
Microphone effective load volume: 960 mm³ (total coupler volume 21245 mm3 (representative value))
– Nominal sound pressure level: 114 dB
– Specified sound pressure level: As noted in supplied calibration chart (114.0 ±0.2 dB (at reference conditions))
– Specified sound pressure level tolerance limit: ±0.15 dB
– Sound pressure level stabilization interval:
After power-on: 5 s or less
After microphone insertion: 30 s or less
– Sound pressure level stability (short-term fluctuations)
±0.05 dB (within rated ambient conditions for use)
(20 s, time weighting F (IEC 61672-1: 2002, JIS C 1509-1:2005))
Nominal frequency 250 Hz
Specified frequency As noted in supplied calibration chart
Specified frequency tolerance limit: within ±1.0% (at reference conditions)
Frequency stabilization interval: After power-on: 5 s or less
Frequency stability ±1.0% (within rated ambient conditions for use) (20 s, time window 1 s)
THD (total harmonic distortion) of output sound pressure tolerance limit: 2.5% or less (20 Hz to 20 kHz, within rated ambient conditions for use)
Influence of static (atmospheric) pressure, ambient temperature, and humidity (at conditions given below)
Sound pressure level (deviation from value for reference conditions): within ±0.2 dB
Frequency (deviation from value for reference conditions): within ±1.0%
Rated ambient conditions: Ambient temperature: +16°C to +30°C; Static pressure: 65 kPa to 108 kPa; Relative humidity: 25% to 90% RH
Sound pressure level variation caused by microphone effective load volume variation: -0.00041 dB/mm3 (representative value)
Power supply: Six IEC LR6 (size AA) alkaline batteries
Power supply voltage: Nominal: 9.0 V, Max. 9.9 V, Min: 7.0 V
Deviation from specified sound pressure level within rated power supply voltage range: Within 0.1 dB referenced to specified sound pressure level at nominal power supply voltage (at reference conditions)
Battery life 13 hours (using six LR6 batteries, at reference conditions)
Battery voltage indication: LED-lit: Possible to use (voltage normal); LED flashing: Possibletouse(voltage low); LED off: Not possible to use
Ambient temperature for storage: -20°C to +60°C (no condensation)
– Ambient conditions for use
Ambient temperature: -10°C to +55°C
Static (atmospheric) pressure: 65 kPa to 108 kPa
Relative humidity 10% to 90% (no condensation)
Permissible ambient sound level: 94 dB or less
Electromagnetic compatibility: EN 60942:2003 (JIS C 1515:2004, IEC 60942:2003), EN 61326:1997
Dimensions: Approx. 44 (W) mm × 62 (H) mm × 170 (D) mm
Weight: approx. 740 g (including batteries)
The Rion NC-72A Pistonphone is a standard sound source that generates a constant sound pressure of 114 dB at 250 Hz.
Designed to provide sound at atmospheric pressure of 101.325 kPa the unit includes a barometer for compensation if required.
The pistons are manufactured with special resin material with low friction. This manufacturing process allows both pistons to maintain their initial performance levels for about 2000 hours without the use of grease.
The Rion NC-72A Pistonphone is suitable for 1”, ½“ and ¼“ microphones
Complies with the IEC 60942:2003(JIS C 1515:2004) Class LS/C
Features Rion NC-72A
– Allows for calibration with the accuracy of + 0.15 dB
– Usable in a wide temperature and humidity range.
– Usable as a standard sound source in laboratories or as a calibration sound source for sound level meters on site.
Rion’s acoustics and vibration technologies support businesses and lifestyles in various fields.
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