Sound Calibrator Nor1255
Nor1255 is a small battery-operated precision class 1 microphone calibrator generating 114 dB @ 1k Hz conforming to IEC 60942 and ANSI S1.40.
The all-digital design with a quartz-controlled signal generator ensuring a frequency stability not yet seen on any calibrator on the market today. The reference microphone and accompanying control circuit maintain a constant sound pressure level inside the calibration coupler and automatically adjusts for changes in load volume, temperature, humidity and barometric pressure. Each calibrator is supplied with an individual accredited calibration certificate.
Features
- Conforms to EN/IEC 60942 : 2017 Class 1 and ANSI S1.40–2006 class 1
- Ultra-stabile silicone reference microphone
- All-digital quartz-controlled signal generator
- Fully compensated for static pressure, humidity and temperature
- Sound pressure independent of microphone equivalent volume
- Robust, compact and battery operated
- 114dB @ 1000 Hz
- Supplied with accredited calibration certificate
The diagrams below show typical influence of variations in the environmental parameters: temperature, humidity and air pressure. The reference conditions are 23ºC (73,4ºF), 50% relative humidity and an air pressure of 101,325 kPa.
Typical sensitivity to temperature:
Typical sensitivity to air pressure:
Typical sensitivity to humidity:
General Sound calibrator class 1 according to EN/IEC 60942 : 2017 Class 1 and ANSI/ASA S1.40-2006 (R2011).
Microphone size: 1/2” and below via adapters
Calibrator frequency ( @ Reference conditions): 1000 ±1.00 Hz
Generated Sound Pressure Level relative to 20µPa (@ Reference conditions): 114.0±0.2 dB
Distortion: Max 2.0 %
Stabilizing time: 20 seconds
Sensitivity to environmental conditions: As specified for IEC 60942 class 1 / ANSI S1.40.
Environmental range for specified operation:
Temperature: -10ºC to +50ºC / 14ºF to 122ºF
Relative humidity: 25 % to 90 %
Air pressure: 65 kPa to 108 kPa
Additional specifications for the built in ambient measurement sensors:
Power off: By power switch or when microphone is removed (may be deactivated)
Battery type: 2 x LR03 alkaline batteries (AAA-size)
Battery life: > 10 hours
Battery low: Automatically switching off if battery voltage too low
Weight: 125 g / 0.28 lb
Size ( LxWxH ): 97 x 51.5 x 41 mm / 3.8 x 2.0 x 1.6“