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How we calibrate
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Calibrators
Nor1255
Class 1 Sound calibrator
Nor1255 is a compact, battery-powered class 1 sound calibrator that generates 114 dB at 1 kHz in accordance with IEC 60942 and ANSI S1.40. Each unit is delivered with an individual accredited calibration certificate for full traceability and regulatory confidence.
Its fully digital architecture with a quartz-controlled signal generator provides exceptional frequency stability. The reference microphone and dedicated control circuitry maintain a constant sound pressure level inside the calibration coupler, automatically compensating for variations in load volume, temperature, humidity, and barometric pressure.
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Features
Standards
Specifications
Downloads
Features
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Conforms to EN/IEC 60942:2017 Class 1 and ANSI S1.40–2006 class 1.
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Ultra-stabile silicone reference microphone.
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All-digital quartz-controlled signal generator.
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Fully compensated for static pressure, humidity and temperature.
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Sound pressure independent of microphone equivalent volume.
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Robust, compact and battery operated.
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114dB @ 1000 Hz.
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Supplied with accredited calibration certificate.
Standards
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IEC 60942:2017
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ANSI/ASA S1.40-2006
Specifications
General Sound calibrator class 1 according to:
- EN/IEC 60942:2017 Class 1
- 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
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“
Accessories included:
May vary if supplied as part of a sound level meter kit:
- Accredited calibration
- 2 x AAA batteries
- Instruction manual
- Leather pouch Nor1345
Downloads for Nor1255
Product data
Certificates
Applications
What are you going to measure?
Environmental noise
Reliable noise monitoring with sound level meter, stand-alone terminals or large-scale systems.
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Building acoustic
Building acoustic is about the sound that travels between rooms - something you'd rather avoid.
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