Instruction manual

7
Controls and Functions
Operation keys
START/STOP key
Press to start and to terminate the sound pressure level measurement (including the
various processing functions). The key is also used to store data in memory.
PAUSE/CONT key
Serves to temporarily pause and resume the measurement. When the data exclusion
(back-erasing) function is used, data for a certain number of seconds before the key was
pressed can be excluded from processing.
OPE MODE key
Serves to call up the various processing results on the display.
For the main channel, possible display items are instantaneous value (L
p
), equivalent
continuous sound pressure level (L
eq
), sound exposure level (L
E
), maximum sound
pressure level (L
max
), minimum sound pressure level (L
min
), and percentile sound pres-
sure level (L
x
). For the sub channel, the takt-max sound pressure level (L
tm3
, L
tm5
), and
the waveform peak hold level (L
peak
) can be displayed.
GRP/NUM/L-T key
In 1/1 octave and 1/3 octave mode, this key switches the display function between
graphical and numeric indication. When showing data stored in memory, the key can
be used to show the level-time indication.
SLM / 1/1 / 1/3 key
This key switches the operation mode between sound level meter (SLM), 1/1 octave
analysis (1/1), and 1/3 octave analysis (1/3).