The all-digital design with a quartz-controlled signal generator ensuring a frequency stability not yet seen an any calibrator on the market today. The reference microphone and control circuit together maintain a constant sound pressure level inside the calibration coupler and automatically adjust for changes in load volume, temperature, humidity, and barometric pressure. The selected level and frequency are clearly indicated on the OLED display. Each calibrator is supplied with an individual accredited calibration certificate.
The Nor1256 is setting a new standard for sound calibrators by offering two levels and frequencies in combination with measurement of ambient temperature, relative humidity, and static pressure. The generated sound pressure levels are 94dB and 114dB (re. 20 µPa) at 250Hz and 1000Hz. The twin frequencies and levels enable linearity and frequency response check of the microphone and allows a wide range of calibration applications to be covered by one unit.
The calibration level, frequency and environmental parameters are displayed on a high contrast OLED display. The calibrator can be used directly on 1” microphones and smaller microphone sizes via adapters. At power on the calibrator generate 114dB@1000Hz. A push on the dB button toggles between 94 and 114dB. Likewise, a push on the Hz button toggles between 1000 and 250Hz. The °C/°F button displays the ambient pressure, temperature, and humidity.
Funktioner
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2 frekvenser samt 2 nivåer (1000 och 250 Hz vid 114 och 94dB)
Uppfyller EN/IEC 60942 : 2017 Class 1
Ultrastabil referensmikrofon
Kompenserar fullt ut för atmosfärstryck, luftfuktighet och temperatur
Kompenserar automatiskt nivån för olika mikrofonvolymer
Robust, kompakt och batteridriven
Digital display
Mäter och presenterar luftfuktighet, temperatur och atmosfärstryck
Standarder
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EN/IEC 60942:2017
ANSI S1.40–2006
Specifikationer
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General Sound calibrator class 1 according to EN/IEC 60942 : 2017 Class 1 and ANSI/ASA S1.40-2006 (R2011). Microphone size: 1/1” and below. Calibrator frequency (@ Reference conditions): 251.19±0.30 Hz and 1000 ±1.00 Hz Generated Sound Pressure Level relative to 20μPa (@ Reference conditions): (114.0±0.2)dB and 94.0±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 Display type and resolution: Mono-colour OLED graphical display – 128×64 (WxH)
Additional specifications for the built in ambinet measurement sensors: Temperature range: -10ºC to +50ºC or 14ºF to 122ºF Resolution / Accuracy: 0.1ºC / ±2ºC or 0.1ºF / ±2ºF Atmospheric pressure: 65 kPa to 108 kPa; Resolution 0.1kPa; Accuracy ±0.4 kPa, (for temperature above 0ºC) Relative humidity: 0% to 100%; Resolution 1%; Accuracy ±4%, (for temperature above 0ºC and humidity in the range 25% to 85%) 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: 125g / 0.28lb Size ( LxWxH ): 97×51.5×41 mm / 3.8×2.0×1.6 “
Accessories included: (may vary if supplied as part of a Sound level meter kit):
