Introduction
Congratulations on your purchase of the Extech 407768 Sound Level Meter. This Auto
Range Sound Level Meter meets ANSI and IEC Type II accuracy standards. Professional
features include programmable Frequency Weighting and Time Response, Min/Max
Memory, Max Hold, Analog output, and RS-232 PC Interface. Careful use of this meter will
provide years of reliable service.
Specifications
Display
5 Digit LCD with overload, low battery and multifunction
indication
Frequency bandwidth
Microphone
31.5 Hz to 8 KHz
0.5” Electret Condensor Microphone
Optically isolated RS-232 port and AC output
Auto Range: 30 to 130dB
Output terminals
Measurement ranges
Manual Ranges: 30 to 80dB, 50 to 100dB, 80 to 130dB
‘A’ and ‘C’ (Programmable)
Frequency weighting
Applicable standards
Resolution
ANSI / IEC Type 2
0.1dB
Maximum/Minimum record
Data Hold
Highest and lowest readings are stored for later recall
Displayed reading is held when HOLD key is pressed
Highest reading displayed only
Max Hold
Response time
Fast: 125ms / Slow:1s (Programmable)
0.5VAC rms full scale (600Ω output impedance)
9V Battery; Consumption: 6mADC approx.
32 to 122oF (0 to 50oC)
AC Analog output
Power
Operating temperature
Operating humidity
Dimensions / Weight
Less than 80% RH
10.6 x 2.7 x 1.1" / 0.63 lbs. (268 x 68 x 29mm / 285g)
Meter Description
1. Microphone
2. LCD Display
1
3. Power, Hold, and Min/Max buttons
4. Max, Weighting, Response Time, & Range buttons
5. AC output jack
2
6. Calibration potentiometer
7. RS-232 PC interface jack
3
4
8. Battery compartment, tilt stand,
and tripod mount on rear
5
6
7
8
2
407768 Version 2.0 06/06
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
