Display Description - Extech Instruments 407780A User Manual

Display Description
1. Sound level range indicator (5 ranges): 30–90dB, 40–100dB, 50–110dB, 60–120dB and 70–
130dB
2. Bar graph represents the current sound level (1dB resolution).
3. Date/time and elapsed time indicator: year ‐ month ‐ day or hour: minute : second.
During integrating this indicator displays the elapsed time in seconds.
When viewing the Peak Hold value this indicator displays PH.
When viewing the percentile values this indicator displays L:05, L:10, L:50, L:90 or L:95.
4. Leq: Equivalent continuous sound level reading
5. SEL: Sound exposure level reading
6. SPL: Time‐weighted sound level reading Sound Pressure Level
7. Low‐battery indication
8. MAX: When displayed flashing it indicates that the Maximum time‐weighted sound level
reading is shown. When it is displayed solid it indicates that the Maximum sound level
reading is displayed.
9. MIN: Minimum sound level reading.
10. REC : Indicates that Data recording is in process
11. Sound level reading (0.1dB resolution): 30.0 – 130.0dB
12. FULL: Indicates that the recording memory bank has been filled
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