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Feature

Two output levels of 94dB and 114dB with Output frequency of 10000.1%Hz (allows calibration with A,B,C or D weighting networks or linear)
Fits inch and 1 inch microphones (includes inch adapter)
Easy One handed operation with low battery indicator
Battery life approx. 100 hours and Conforms to IEC942 Class 1
Altitude Effects: Approximately0.1dB decrease for each 2000ft increase in altitude from the sea level to 12,000ft elevation or comparable atmospheric pressure change (approx. every 50mm of Hg decrease)

Description

The calibrator generates these fixed sound level signals for calibration of sound level meters. This model works with any digital sound level meter. The unit ships with a " adaptor installed to accommodate sound meters and microphones with 1" or 1/2" microphone.


Features
To correct for atmospheric pressure in areas of high altitude the transducer diaphragm
It has two output levels of 94 dB and 114 dB.
Calibrated to produce 94dB at sea level.
For each 2000ft of elevation sea ND-9 produces 0.1dB less than the 94dB rating.

Specifications
Output Sound Level: 94db & 114db
Accuracy: 0.3db(20C, 760mm Hg)
Frequency: 10000.1%Hz (allows calibration with A,B,C or D weighting networks or linear)
Temp. range: -10~50C (14~122 F)
Storage (with battery removed) -40~65C (-40 ~ 149 F)
Extremely low influence of static pressure
Temp.coefficient : 0 ~ 0.01dB/C
Power Supply: 9v Battery
Battery life approx.100 hours
Package Size: 17cm x 9cm x 6cm
Package Weight: 0.39kg

Set Includes
1 x Sound Level Meters Calibrator
1 x 9V Battery installed (FREE)
1 x English Instruction Manual
Standard factory packaging box