ND-9 Handheld Digital Sound Noise Level Tester Calibrator for Sound Level Meter 94dB & 114dB output Class I w/ Battery +/-0.3 db Accuracy for microphone , sound measuring system for acoustics field and laboratory use

Model : ND-9

The Sound Level Calibrator is a handy source for fast & easy calibration of sound level meter, microphone and sound measuring system. Design to check the accuracy of many types of sound instruments.

Moreover, the calibrator employs a solid state integrated circuitry that provides accurate and stable performance. It is Compatible with SL-5868P sound level meter and an IEC942 Class I compliant.

Applications:

• Sensitivity calibration for microphones
• Suitable for acoustics field and laboratory use

Features

• Output Sound Level: 94db & 114db
• Accuracy: ±0.3db (20°C, 760mm Hg)
• Frequency: 1000±0.1%Hz (allows calibration with A,B,C or D weighting networks or linear)
• Temperature range: -10~50°C (14 ~ 122 °F)
• Standard: IEC942 Class I
• Design For: 1"and 1/2" microphones
• Storage (with batteries removed) -40~65°C (-40 ~ 149 °F)
• Extremely low influence of static pressure
• Temperature coefficient : 0 to 0.01dB/°C
• Altitude Effects: Approximately0.1dB decrease for each 2000 feet increase in altitudefrom the sea level to 12,000 feet elevation or comparableatmospheric pressure change (approx. every 50mm of Hgdecrease)
• Power Supply: 9v transistor batteries NEDA 1604. Burgess 2U6 or equivalent.
• Battery life approx.100 hours
• Dimension: 48mm x 48mm x 138mm (5.43 x 1.89 x 1.89 inch)
• Weight: 250g