Extech Analog Sound Level Meter is a handheld sound level meter produced by Extech company. It measures sound pressure levels from 54 to 126dB in 7 ranges, with an accuracy of ±2 dB@1kHz at 94 dB sound level.
This user manual covers the operation of the Extech 407706 analog sound level meter, including how to set ranges, use weighting and response modes, and read measurements. It also details battery replacement, analog output, tripod mounting, and warranty information. The meter is battery-powered, calibrated, and designed for portable use in various acoustic environments.
| Ranges | 54 to 126dB in 7 ranges (referenced to 0.00002 bar) |
|---|---|
| Resolution | Analog Continuous |
| Accuracy | ±2 dB @1kHz at 94 dB sound level |
| Microphone type | Condenser Electret |
| Analog output | AC: 0.707Vrms (full scale) |
| Meter power | 9V battery (120-hour battery life) |
| Dimensions/Weight | 2.7 x 7.1 x 1.4" (68 x 180 x 36mm) / 5.1 oz. (160g) |
The meter uses a 9V battery with a 120-hour battery life.
Start with the highest range (120 dB) and work downward until the needle deflects significantly; use the lower setting for greater accuracy.
Press and hold the MAX button to freeze the maximum reading on the analog indicator.
The analog output provides 0.707Vrms AC (full scale) for connection to external equipment.