Extech Instruments 407727 User Manual

User’s Manual

Model 407727
Digital Sound Level Meter

Introduction

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

Specifications

Measurement ranges Auto range from 40 to 130dB ('A' Weighted)

Resolution 0.1 dB
Accuracy ±2 dB at 94 dB sound level
Display 3 1/2 digit LCD with analog bargraph
Display update rate 160ms (LCD), 40ms (bargraph)
Time weighting Fast / Slow Response (selectable)

Frequency weighting
Analog output

Microphone type Condenser Electret
Power Meter powered by 9V battery ;120 hour battery life
Dimensions/Weight 2.7x7.1x1.4" (68 x 180 x 36mm) / 5.1 oz. (160g)

Auto range from 45 to 130dB ('C' Weighted)

'A' and 'C' weighting (selectable)

AC: 0.707Vrms

Front Panel Description

1 Microphone
2 LCD Display
3 Analog Bargraph Display
4 ON/OFF key
5 Range key
6 A/C Weighting selection key
7 Min/Max Record key
8 Fast/Slow selection key
9 Maximum Hold activation key
Note: Battery compartment and Tripod mount are on the rear of the meter.

The Analog output jack is located on the left side of the meter.