407744 Datasheet, PDF (2/4 Pages) Extech Instruments Corporation. – Sound Level Calibrators

Introduction
Congratulations on your purchase of Extech’s Sound Level Calibrator. Extech Calibrators
accommodate Sound Level Meters with 0.5” and 1” microphones. The Calibrator’s die-cast
aluminum housing is built for ruggedness and durability. The 407744 provides a 94dB
calibration output signal while the 407766 provides both 94dB and 114dB outputs. This
professional calibrator, with proper care, will provide years of safe reliable service.
Specifications
Output signals
Output signal accuracy
Output signal frequency
Accuracy of output signal frequency
Compatible microphones sizes
Total Harmonic Distortion (THD)
Operating temperature
Power supply
Power consumption
Battery check
Dimensions
Weight
407744: 94dB
407766: 94dB and 114dB
407744: ± 0.5dB;
407766: ± 0.5dB (94dB), ±0.8dB (114dB)
1KHz sine wave
± 5%
0.5” and 1” microphones
<2%@94dB, <5%@114dB (407766)
32 to 122^oF (0 to 50^oC)
Two (2) 9V batteries
Approx. 10mA DC
Status LED
2.2” diameter x 5.7” length (50 x 145mm)
0.75 lbs. (340g)
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Models 407744 & 407766 - Version 5.0 - May 2005