Brüel & Kjær 2240 Guide De L'utilisateur page 27

Operation
Display
During normal operation, you use the display screen to view your measurements. The informa-
tion provided is described below.
Fig.4.5 The display screen
.
1. Mark for calculating
3. Bottom end of
measurement range
in dB
6. Under-range
indicator
9. Parameter
display
11. Battery level
1) Mark for calculating: This symbol is displayed and flashes when the instrument is
measuring.
2) Elapsed time: Displays the amount of time that has passed since measurement began (from
1 second to 60 minutes). After the 60-minute maximum has elapsed, all measurements
automatically stop.
3) The bottom end of the measurement range (in decibels): Sounds 0.5 dB or more below
this level register as under range. To change the measurement range, stop the measurement
and press
4) Quasi-analogue bar graph: Shows a graphical representation of the current sound pressure
level. It is updated 10 times per second.
5) The upper end of the measurement range (in decibels): Sounds 0.3 dB or more above
this level trigger an overload warning. To change the measurement range, stop the measure-
ment and press
4. Quasi-analogue bar graph
7. Calibration value
12. Peak or Time weighting
.
.
2. Elapsed time
PART 1
21
English
5. Upper end
of measurement
range in dB
8. Overload
indicators
10. Sound pressure
level value