Table Of Contents - Extech Instruments 400790A User Manual

Table of Contents
1. INTRODUCTION ................................................................................................ 3
1.1 Instrument Care ............................................................................................ 4
1.2 Features ........................................................................................................ 5
2. DESCRIPTIONS ................................................................................................ 6
2.1 Meter Description .......................................................................................... 6
2.2 Operation Buttons ......................................................................................... 7
2.3 Display Screen .............................................................................................. 9
2.4 Analysis screen ........................................................................................... 11
2.5 Numeric Display screen .............................................................................. 12
3. MEASUREMENT PREPARATION AND SETUP ............................................ 13
3.1 Setting the Date and Time .......................................................................... 13
3.2 SD Memory Card ........................................................................................ 15
3.3 Setting the Backlight Auto Off time ............................................................. 15
3.4 Sub Channel Settings ................................................................................. 16
3.5 Selecting the Lmax/Lmin type .................................................................... 17
3.6 Comparator Output Operation .................................................................... 18
3.7 Trigger Mode Setup and Operation ............................................................ 21
3.7.1 Trigger Setup ........................................................................................................... 22
3.7.2 External Trigger Setting .......................................................................................... 22
3.7.3 Trigger Time Setting ............................................................................................... 22
3.7.4 Trigger Level Setting ............................................................................................... 23
4.MEASUREMENTS ............................................................................................. 25
4.1 Sound Level Measurements ....................................................................... 25
4.2 SEL, Leq, Lmax, Lmin, LN Measurements ................................................. 26
4.3 Sound Level and Octave Band Analysis Measurement ............................. 28
4.4 Sound Band - Leq, SEL, Lmax, Lmin and LN Analysis Measurement ....... 30
5. STORING DATA TO MEMORY ........................................................................ 32
5.1 Manual Memory Storage ............................................................................ 32
5.2 Recalling Manually Stored Data ................................................................. 35
5.3 Erasing Manually Stored Data .................................................................... 37
5.4 Auto 1 Memory Storage .............................................................................. 38
5.5 Auto 2 Memory Storage .............................................................................. 41
5.6 Erasing Auto Stored Data ........................................................................... 42
6. SOFTWARE DOWNLOAD AND INSTALLATION ........................................... 43
7. SOUND PRESSURE LEVEL - TECHNICAL NOTES ...................................... 44
8. CALIBRATION .................................................................................................. 45
9. SPECIFICATIONS ............................................................................................ 46
10. WARRANTY ................................................................................................... 49
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