Sound Level Calibrators
94dB or combination 94dB/114dB, 1kHz Professional
Calibrator for 0.5" or 1.0" Microphones
With durable die-cast, aluminum housing
Features:
•
Calibrates and verifies Sound Level Meter operation
•
For use on Sound Level Meters with 0.5" or 1.0" microphones
•
Total Harmonic Distortion (THD) <2% at 94dB
•
Meets IEC standard 60942 1997-11
•
Complete with two 9V batteries, carrying case, and screwdriver
Model 407744
•
Battery test position with battery status LED
indicates if battery is good
•
1kHz sine wave at 94dB is generated to an
accuracy of 5% (frequency) and ±0.8dB
Model 407766
•
LED indicator lights up when power is on
•
Level position to select 94dB or 114dB
•
1kHz sine wave at 94dB/114dB is generated to an
accuracy of 5% (frequency) and ±0.8dB
•
3 position switch (OFF/94dB/114dB)
407766
407744
Specifications
Frequency
Sound Pressure Level
Distortion
Operating Temperature
Power Supply
Power consumption
Dimensions
Weight
Range
1000 Hz
94 dB (407744); 94dB/114dB (407766)
<2% Total Harmonic Distortion (THD)
32 to 122°F (0 to 50°C)
Two Heavy duty, alkaline 9V Battery
Approx. 10mA DC
2.2" diameter x 5.6" long (50 x 127mm)
0.75 lbs. (340g)
Accuracy
±5%
±0.5dB (94dB), ±1dB (114dB)
Ordering Information:
407744....................Sound
Level Calibrator, 94dB
407744-NIST
..........Sound Level Calibrator, 94dB with NIST Cert.
407766....................Sound
Level Calibrator, 94dB/114dB
407766-NIST
..........Sound Level Calibrator, 94dB/114dB with NIST Cert.
www.extech.com
Specifications subject to change without notice.
7/28/08 - R1
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