This manual introduces the features and usage of the Extech 407768 Sound Level Meter. This sound level meter has auto range measurement, programmable frequency weighting and time response, Min/Max Memory, Max Hold, Analog output and RS-232 PC Interface.
The Extech Model 407768 is an auto-range digital sound level meter that meets ANSI and IEC Type II accuracy standards. It features programmable frequency weighting (A and C) and time response, along with Min/Max memory and analog output capabilities.
This guide provides instructions for powering the device, performing calibration using an external calibrator, taking measurements in various modes including Max Hold and Data Recording, and utilizing the RS-232 PC interface.
| Accuracy Standard | ANSI and IEC Type II accuracy standards |
|---|---|
| Frequency Bandwidth | 31.5 Hz to 8 KHz |
| Microphone Type | 0.5" Electret Condensor Microphone |
| Measurement Ranges (Auto) | 30 to 130dB |
| Resolution | 0.1dB |
| Response Time (Fast) | 125ms / Programmable 200ms |
| Power Source | 9V Battery |
The meter supports 'A' and 'C' frequency weighting, which can be programmed.
Press the REC MAX/MIN button to activate Record mode, which disables the auto power off.
The device operates between 32 to 122°F (0 to 50°C).