Instruction manual

53
Sound Pressure Level Measurement
Sound Exposure Level Measurement (L
AE
)
To make the sound exposure level measurement, carry out the following steps. The proce-
dure is almost identical to the equivalent continuous sound pressure level measurement.
1. Set the power switch on the side of the unit to ON and wait until the measurement
screen appears.
(For an explanation of the power-on procedure, refer to page 42.)
2. Press the SETUP key to call up the SETUP menu screen.
(For an explanation of how to use the SETUP menu screen, refer to page 30.)
3. Set "MEASURE MODE" to "LEQ".
4. Set the measurement time with the "Leq Time" item. The maximum setting is 99
hours.
5. If desired, you can use the back-erase function (p. 66), the trigger function (p. 68), or
the delayed measurement function (p. 74). For more information, please refer to the
respective pages.
6. Press the SETUP key to return to the original screen.
7. Use the SLM / 1/1 / 1/3 key to activate the sound pressure level measurement screen.
8. Use the FREQ WEIGHT key to select "A" weighting (L
AE
).
9. Use the TIME CONST key to select the desired time constant setting.
Normally, the "FAST" setting should be used.
10. Use the LEVEL UP/DOWN keys to select the level range. Choose a setting in which
the "OVER" and "UNDER" indications do not appear (the bar graph should register
to about the middle of the range).
11. Press the START/STOP key.
The LED indicator and the mark on the display start to flash, and the sound expo-
sure level measurement begins.