Instrument Components - Brüel & Kjær 2240 Guide De L'utilisateur

10 Integrating-averaging Sound Level Meter Type 2240 – User Guide
without being harmful or even annoying, so care should be taken to use L
intended purpose. Such high values can be misleading in situations where they are not called
for. Note: L
Fig.2.4
L parameter
Cpeak
displayed
L , L , and L
AFmax Cpeak
started (press
calculated automatically when the sound level meter is switched on.
The measured values of L
started.

Instrument Components

Fig.2.5 Front, side and back view of Type 2240 instrument
Front Panel
3
8
4
6
The following descriptions refer to the numbered instrument parts in Fig.2.5:
1) Sound Level Meter body: The main part of your instrument.
is not time-weighted.
Cpeak
sound level parameters begin calculation only when a measurement is
Aeq
), and stop only when the measurement is stopped (press
, L , and L
AFmax Cpeak
Side Panel
5
2
7
are cleared whenever a new measurement is
Aeq
Back Panel
1
9
10
11
only for its
Cpeak
again). L is
AF