Brüel & Kjær 2240 Guide De L'utilisateur page 18

12 Integrating-averaging Sound Level Meter Type 2240 – User Guide
Note: All keys function step-wise, as illustrated by the quick guide's use of arrows. Press a key
to step through the available functions. When the last possible function comes up, the instru-
ment will automatically scroll through the choices again as you continue to press.
Start/Stop Key
This key controls the initiation and completion of a measurement.
Sound Level Parameter Key
This key controls which sound level parameter is displayed. It is not necessary to configure any
sound level parameter, as all four parameters are measured simultaneously as soon as a meas-
urement is started.
Quick Guide Symbol
To start a measurement,
press
on the display
To stop a measurement,
press
flashing on the display
Quick Guide Symbol
L
A
L
Aeq
L
Amax
L
Cpeak
Instructions
until appears
until stops
Instructions
To display the A-weighted
sound pressure level, press
until L appears on the
A
display. Note: L is time-
A
weighted, using Fast
weighting
To display the A-weighted,
equivalent continuous
sound pressure level, press
until L appears on
Aeq
the display
To display the maximum A-
weighted sound pressure
level, press until L
Amax
appears on the display.
Note: L is time
Amax
weighted, using Fast
weighting
To display the C-weighted,
peak sound pressure level,
press until L
Cpeak
appears on the display.