Digital Sound Level Calibrator (Calibrate Sound Level Meters & Measuring Systems) *****           The ND9 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 Special Features Sound Pressure Level with 94 dB and 114 dB High Accuracy with ±0.3 db Generates standard levels and frequencies Extremely low influence of static pressure Sensitivity calibration of microphones Designed for 1" and 1/2" microphones Battery Operated Supplied with Instruction Manual and battery Specifications 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: 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: 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 Standard Set Includes 1 x Sound Level Meters Calibrator 1 x Carrying case (FREE) 1 x 9V Battery installed (FREE) 1 x Instruction Manual Standard factory packaging box     Copyright © 2008. All rights reserved. Discount Instrument *