Extech 407744, 407766 Data Sheet

Specifications subject to change without notice.
Copyright © 2008 Extech Instruments Corporation. All rights reserved including the right of reproduction in whole or in part in any form.

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7/28/08 - R1

94dB or combination 94dB/114dB, 1kHz Professional

Calibrator for 0.5" or 1.0" Microphones

With durable die-cast, aluminum housing

Sound Level Calibrators

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.

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)

Specifications Range Accuracy

Frequency 1000 Hz ±5%
Sound Pressure Level 94 dB (407744); 94dB/114dB (407766) ±0.5dB (94dB), ±1dB (114dB)
Distortion <2% Total Harmonic Distortion (THD)
Operating Temperature 32 to 122°F (0 to 50°C)
Power Supply Two Heavy duty, alkaline 9V Battery
Power consumption Approx. 10mA DC
Dimensions 2.2" diameter x 5.6" long (50 x 127mm)
Weight 0.75 lbs. (340g)

407744

407766