Instruction manual

43
Sound Pressure Level Measurement
If the date and time are not set, the indication "RTC Read Error!!" appears after turning on
the power. In this case, use the I/O menu screen to set the date and time, as described on
page 24.
Instantaneous Sound Pressure Level Measurement
(L
A
, L
C
, L
p
)
To perform a 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 SLM / 1/1 / 1/3 key to activate the sound pressure level measurement
screen.
3. 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.