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The ND9 Sound Level Calibrator is a handy source for fast & easy calibration of sound level meter and sound measuring system. Design to check the accuracy of many types of sound instruments. It is a handy sound source for quick and easy calibration of sound level meters and sound measuring systems. It features a solid state integrated circuitry that provides accurate and stable performance. Compatible with SL-5868P sound level meter and an IEC942 Class I compliant.

Features:

- Workhorse of the acoustics field
- Generates standard levels and frequencies
- Extremely low influence of static pressure
- Sensitivity calibration of microphones
- Adaptable to 1.5" microphone size
- Suitable for laboratory and in the field use
- Supplied with Instruction Manual and batteries
- Adaptors and cases available

Specifications:

* Standard: IEC942 Class I
* Output Sound Level: 94db & 114db
* Accuracy: ±0.3db (20ºC, 760mm Hg)
* Frequency: 1000±0.1% Hz (allows calibration with A,B,C or D weighting networks or linear
* Temperature range: -10ºC~50ºC operating
* Design For: 1" and 1/2" microphones
* Storage (with batteries are removed) -40ºC~65ºC
* Extremely low influence of static pressure
* Temperature coefficient: 0 to 0.01dB/ºC
* Altitude Effects: Approximately 0.1dB decrease for each 2000 feet increase in altitude from the sea level to 12,000 feet elevation or comparable atmospheric pressure change (approx. every 50mm of Hg decrease)
* Power Supply: 2 x 9v transistor batteries NEDA 1604. Burgess 2U6 or equivalent. Battery life approx. 100 hours
* Dimension: 48mm x 48mm x 138mm
* Weight: 250g


Accessories included:

User's Manual