Extech 403407 Instruction Manual

Model 403407

Sound Level ProbeMeter™

 A and C Weighting

 Fast and Slow Response

 Max Hold

 Type II Compliance

1. INTRODUCTION

Congratulations on your purchase of Extech’s Sound Level ProbeMeter™. This professional
meter, with proper care, will provide years of safe reliable service.

INSTRUCTION MANUAL

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2. SPECIFICATIONS

General

Display 31/2 digit LCD, 1999 count
Low battery The battery symbol appears in the LCD.
Display rate Once per second
Operating
En vironment
Storage
Environment
Batteries Four 1.5V AAA size
Battery life 50 hours typical
Dimensions 107 x 8.5 x 1.6” (217mm x 44mm x 40mm)
Weight 6.4oz. (168g) including batteries

Electrical

Applicable standards ANSI S1.4-1983 Type 2

Measurement range Lo range 35-90dB

Resolution 0.1dB
Frequency
Weighting
Frequency Range 31.5Hz to 8000Hz
Detector True RMS
Dynamic range 55dB
Max Hold decay time <1dB/3 minutes with reset
Time weighting S(slow) and F(fast) selectable
Microphone ½” electret condenser
DC Output
AC Output 0.55V rms at full scale of selected range, output

Warm-up <5seconds
Calibration conditions 1000Hz, 94dB, 20oC, 65%RH, 75-130dB range
Temperature effect <0.5dB (-10oC to 50oC)
Humidity effect <0.5dB for 30% to 90%RH at 40oC, 1kHz

3. CONTROLS

1. Microphone

2. LCD display

3. Normal / Max mode switch

4. A/C weighting switch

5. Fast / Slow response switch

6. Power / Range switch

7. Calibration adjustment

8. Battery compartment (rear)

9. AC / DC output jack

14oF to 122oF (-10oC to 50oC), <90% RH

-4oF to 140oF (-20oC to 60oC), <80% RH, batteries
removed

IEC 651-1979 Type 2
JIS C 1502

Hi range 75-130dB

A and C selectable

10mV/dB, output impedance 100Ω
impedance 600Ω

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