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 is 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 enables 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.

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Features

• Conforms to EN/IEC 60942 : 2017 Class 1, and ANSI S1.40–2006
• 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.
• 114 and 94dB @ 1000 and 250 Hz
• Built in display
• Measurement of humidity, temperature and static pressure

Influence of environmental conditions