Installing Batteries - Brüel & Kjær 2240 Guide De L'utilisateur

The Sound Level Parameter key can also be used to electrically calibrate the instrument by
holding down for three seconds. Actual adjustments are made using the calibration switch
on the side panel, and the included screwdriver. It is a good idea to calibrate the instrument
before and after a series of measurements to conform to required standards and ensure precise
results each time. See "Calibration" on page 18. for more information.
Sound Level Range Key
This key controls the sound level range to be measured.

Installing Batteries

Type 2240's power supply consists of two AA-size (IEC R 6 or LR 6) alkaline batteries. To
install the batteries, do the following:
1) Make sure the sound level meter is switched off.
2) The battery compartment is located in the centre of the instrument's back panel. Slide the
cover off.
Fig.2.7
Type 2240 with the
battery cover removed
3) Insert 2 new batteries following the +/– orientation shown at the bottom of the battery
compartment.
Quick Guide Symbol
To measure in this range,
press
30 – 110 dB
graph shows a range of
30 – 110 dB
To measure in this range,
press
60 – 140 dB
graph shows a range of
60 – 140 dB
Instructions
until the bar
until the bar
PART 1
13
English