407735 Ver. 2.1 04/2006
2
Specifications
Display
3-1/2 digit (2000 count) LCD
Display update rate
0.5 seconds
Microphone
0.5” Electret condensor
Measurement Bandwidth
31.5Hz to 8KHz
Dynamic range
65dB
Measurement Range
35 to 130dB (Low: 35 to 90; High: 65 to 130dB)
Frequency weighting
‘A’ and ‘C’ (selectable)
Accuracy / Resolution
± 2.0dB @1kHz / 0.1dB
Maximum Hold decay time
<1dB / 3min
Response time
Fast: 125 milliseconds / Slow: 1 second
Built-in calibration check
1KHz internal sine wave @ 94dB
AC Analog output
0.65VAC rms (full scale); 600
Ω
output impedance
DC Analog output
10mVDC / dB; 100
Ω
output impedance (approx).
Power 9V
Battery
Battery life
50 hours (typical); Low battery indicator alerts user
Operating temperature
32 to 104
o
F (0 to 40
o
C)
Operating humidity
10 to 90% RH
Dimensions/weight
9.45 x 2.68 x 1” (240 x 68 x 25mm) / 6.75oz (210g)
Meter Description
1. Microphone
2. LCD
display
3.
POWER OFF & RANGE select switch
4.
RESPONSE & HOLD select switch
5.
A/C weighting and Calibration switch
6.
Calibration adjust screw for 94dB
7.
Reset key (resets max hold reading)
8.
AC/DC analog output 3.5mm phone jack
9.
Battery compartment and Tripod mount are located
on back of meter
Measurement Considerations
1.
Wind blowing across the microphone adds extraneous noise to the measurement.
Use the supplied windscreen to cover the microphone when applicable.
2.
Calibrate the instrument before each use if possible. Especially if the meter has not
been used for a long period of time.
3.
Do not store or operate the instrument in areas of high temperature or humidity.
4.
Keep meter and microphone dry.
5.
Avoid severe vibration when using the meter.
6.
Remove the battery when the meter is to be stored for long periods of time.
