Instruction manual

Sound Pressure Level Measurement

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 maximum

and minimum sound pressure level measurement 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 corresponds to the sound pressure level.

Using the PAUSE/CONT key, you can pause and resume the level reading and bar

graph display.

12. Press the OPE MODE key to display the maximum and minimum sound pressure

level in turn.

The maximum level is shown as L

Amax

and the minimum level as L

Amin