Introduction; Meter Description - Extech Instruments 407730 User Manual

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
1
2
3
4
5
8
7
1
REC MAX HOLD MIN
2
AUTO
MANU
3
SPL
40
4
+0
+10
2 Model 407730 Version 1.3 June 2004
11
9
6
10
7
8
10
9
FAST SLOW
6
5
A
C
dB
11
+20 +30