BRUEL & KJAER 2240 - Start;Stop Key; Sound Level Parameter Key

Integrating-averaging Sound Level Meter Type 2240 – User Guide12
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 Instructions
To start a measurement,
press until appears
on the display
To stop a measurement,
press until stops
flashing on the display
Quick Guide Symbol Instructions
L
A
To display the A-weighted
sound pressure level, press
until L
A
appears on the
display. Note: L
A
is time-
weighted, using Fast
weighting
L
Aeq
To display the A-weighted,
equivalent continuous
sound pressure level, press
until L
Aeq
appears on
the display
L
Amax
To display the maximum A-
weighted sound pressure
level, press until L
Amax
appears on the display.
Note: L
Amax
is time
weighted, using Fast
weighting
L
Cpeak
To display the C-weighted,
peak sound pressure level,
press until L
Cpeak
appears on the display.