Product Manual

407730-en-EU_V1.9 7/14
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REC
MAX
HOLD
MIN
AUTO
MANU
SPL
FAST SLOW
A
C
dB
+10
+0
+20 +30
40
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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