Instruction manual

46
Sound Pressure Level Measurement
Maximum and Minimum Sound Pressure Level Measurement
(L
max
, L
min
)
The maximum and minimum sound pressure level for a given measurement interval can
be measured.
To make the measurement, carry out the following 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 SET UP key to return the measurement 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
A
). For
sound pressure level measurements with "C" weighting, select "C" (L
C
). When "L
p
"
is selected, frequency weighting is flat.