This document is the user manual of Extech Model 407732 Digital Sound Level Meter, which introduces the features and usage of the product
This user guide explains how to operate and maintain the Extech Model 407732 digital sound level meter. It includes instructions for powering the device, selecting measurement ranges and frequency weightings, using MAX HOLD and DATA HOLD modes, and calibrating the meter. The guide also covers environmental conditions, maintenance, and battery replacement.
Safety and environmental considerations are outlined, including operating temperature, humidity, and storage limits. The guide provides detailed specifications such as measurement range, frequency weighting, response time, and accuracy. Calibration requires an external 94dB 1kHz calibrator and a small screwdriver. Battery life is rated at 50 hours, with a low battery indicator and disposal instructions.
| Display | 4-digit (4000 count) backlit 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 100; High: 65 to 130dB) |
| Frequency weighting | ‘A’ and ‘C’ (selectable) |
| Accuracy / Resolution | ± 1.5dB / 0.1dB |
| Response time | Fast: 125 milliseconds / Slow: 1 second |
| Power | 9V Battery |
| Battery life | 50 hours (typical) |
| Operating temperature | 0 to 40oC (32 to 104oF) |
| Operating humidity | 10 to 90% RH |
| Storage temperature | -10 to 60oC (14 to 140oF) |
| Storage humidity | 10 to 75% RH |
| Dimensions/weight | 240 x 68 x 25mm (9.45 x 2.68 x 1”) /210g (6.75oz) |
The battery life is 50 hours (typical).
The operating temperature range is 0 to 40°C (32 to 104°F).
Press the backlight button to turn the backlight on. Press again to turn it off.