Table of Contents
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Specifications
Applicable Standards
Measurement Functions
Primary Functions
Total range
Maximum level
Accuracy
Noise floor
Calibration signal
Range selections
Frequency range
Frequency weighting
Time weighting
Calibration
Display update rate
Data memory
Microphone
Display
Display features
Warning indicators
Analog Outputs
Power requirements
Operating conditions
Storage conditions
Dimensions
Weight
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User's Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
IEC61672-1: 2002 Class 2; IEC60651: 1979 Type 2; ANSI S1.4:1983 Type 2
Sound Pressure Level
Maximum Sound Level
Minimum Sound Level
26 to 130dB (32 to 130dB for 'C' weighted measurements)
130dB
± 1.5dB (under reference conditions)
'A' weighting: 26dB
'C' weighting: 32dB
94dB at 1kHz (sinusoidal)
26 to 80, 30 to 90, 40 to 100, 50 to 110, 60 to 120, 70 to 130
31.5 to 8000 Hz
'A' and 'C'
Fast (125ms) and Slow (1 second) Response
Requires external calibrator (not included)
Bargraph display: 125ms; Numerical indication: 1 second
99 data sets (max.) for sound level (L), maximum sound level (Lmax), and
minimum sound level (Lmin) can be stored with elapsed timer.
0.5" electret condensor
4-digit indication of sound level with 0.1dB resolution
Bargraph indication of sound level with 1dB resolution
Elapsed time; 100 hours maximum
Store and recall readings (99 data sets max.)
Over-range 'OV'; Under-range: 'Un'
AC: 0.707Vrms full scale; Output impedance: 5KΩ
DC: 10mV/1dB; Output impedance: 5KΩ
9V Battery; Battery life approx. 50 hours
o
o
14 to 122
F (-10 to 50
C); 90% relative humidity max.
14 to 132
o
F (-10 to 60
o
C); 90% relative humidity max.
10.4 x 2.7 x 1.1" (264 x 68 x 27mm)
9.2 oz. (260g)
Support line (781) 890-7440
2
Model 407738 Version 2.2 September 2005
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