Extech 407730 Operating Manual

User's Guide

Digital Sound Level Meter

Model 407730

Introduction

Congratulations on your purchase of the Extech 407730 Digital Sound Level Meter. The
407730 measures and displays sound pressure levels in dB from 40 to 130dB. User
selectable features include Frequency Weighting (‘A’ and ‘C’), Response Time (Fast and
Slow), Max Hold, and Max/Min recording. Careful use of this meter will provide years of
reliable service.

Meter Description

1. Microphone

2. LCD Display

3. ON-OFF button

4. A/C weighting selection button

5. Min/Max Record button

6. Range selector button

7. F/S response selection button

8. Max Hold selector button

9. Calibration adjustment

10. AC analog output jack

11. Windscreen

1. Record icon

2. Auto or Manual range

3. Range indicator

4. Bargraph

5. A or C weighting

6. Low bat icon

7. Max level indicator

8. Hold indicator

9. Min indicator

10. Fast or Slow weighting

11. dB display

11

1

2

9

3

6
10

4

5

8

7

9

7

8

10

1

FAS T

REC

2

3

4

AUTO

MANU

SPL

40

+0

MAX

HOLD

+10

MIN

SLOW

A
C

dB

+20 +30

6

5

11

Model 407730 Version 1.4 April 2006 2