Instruction manual

Sound Pressure Level Measurement

Equivalent Continuous Sound Pressure Level Measurement

)

To make the equivalent continuous sound pressure level measurement, carry out the fol-

lowing steps.

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 the desired frequency weighting setting.

For normal sound pressure level measurements, select "A" weighting (L

Aeq

). For

sound pressure level measurements with "C" weighting, select "C" (L

Ceq

). When

peq

" is selected, frequency weighting is flat.

9. Use the TIME CONST key to select the desired time constant setting.

Normally, the "FAST" setting should be used.