Instruction manual

58
Sound Pressure Level Measurement
7. Select up to five Lx settings out of L1 to Leq. If five settings are already selected and
you wish to use other settings, turn unused settings OFF first.
8. Press the DISPLAY key to return to the original screen.
9. Use the SLM / 1/1 / 1/3 key to activate the sound pressure level measurement screen.
The selected five percentile levels are shown.
10. Use the FREQ WEIGHT key to set frequency weighting to "A".
11. Use the TIME CONST key to select the desired time constant setting.
Normally, the "FAST" setting should be used.
12. 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).
13. Press the START/STOP key.
The LED indicator and the mark on the display start to flash, and the level mea-
surement begins.
When the measurement time set in step 4 has elapsed, the measurement stops auto-
matically. When wishing to terminate the measurement earlier, press the START/
STOP key.
If an overload condition has occurred at least once during the measurement, the
"OVER" indication is shown on the display.
The display reading shows the percentile sound pressure level for the selected set-
tings.
Using the PAUSE/CONT key, you can pause and resume the level reading and bar
graph display.
14. Press the OPE MODE key to display the level.