407780 Datasheet, PDF (4/13 Pages) Extech Instruments Corporation. – Integrating Sound Level Datalogger

Display Description
1. Level range
2. Date information
3. Leq: Equivalent continuous
4. SEL: Sound exposure level
5. SPL: Instantaneous sound
pressure level
6. Low-Battery indicator
7. MAX: Maximum SPL value is
held during measurement.
8. MIN: Minimum SPL value is
held during measurement.
9. INST: Instantaneous of sound
pressure level
10. Data recording
11. Measuring value
12. Memory full
13. Unit
14. Frequency weighting (A/C)
15. IMPULSE time weighting
16. When the TIME display icon
switches on, the real time clock
is displayed. When the TIME
icon is off the display shows
elapsed time for Leq and SEL
measurements.
17. Bargraph (100dB range with 50
segments)
18. Range over
19. SLOW time weighting
20. FAST time weighting
21. Measurement completion of Leq
and SEL
22. Measurement interruption of
Leq and SEL
23. Leq and SEL readings
24. Under Range
4
Model 407780 Version 2.1 09/07