BRUEL & KJAER 2203 User Manual

3. OPERATION
This Instruction Manual describes the specific procedures necessary to correctly use the
Precision Sound Level Meter Type 2203 . However, there are many aspects of sound
measurement of a more general nature that are important to consider in order to get cor-
rect reproducible measurements. Many of these are discussed in the accompanying book-
let, "Measuring Sound", which should be considered as part of this Instruction Manual.
3.1. BATTERY CONSIDERATIONS
The 2203 is powered by three standard torch batteries (D cells or Type R 20 in IEC Publi-
cation 86-2) . Access to the batteries is gained by unscrewing the four screws which
hold the bottom cover of the 2203. The batteries should be inserted such that their posi-
tive terminals point to the front panel of the instrument, as shown in Fig.3.1 .
Fig. 3. 1. Battery compartment of 2203
Good-quality dry cells give an operating time of 1 2 hours, while alkaline cells, such as
Mallory Duracell MN 1300, give 50 hours of continuous operation. Rechargeable nickel-
cadmium cells may also be used, giving an operating time of 20 hours. These cells may
be recharged using the Power Supply Type 2808 with Battery Box ZG 0073 and Charg-
ing Adaptor AQ 0043- see the 2808 Instruction Manual.
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BRUEL & KJAER 2203 Specifications

General

Type	Sound Level Meter
Frequency Range	20 Hz to 20 kHz
Input Impedance	1 MΩ
Output Impedance	600 Ω
Detector	RMS
Display	Analog meter
Weight	1.5 kg
Power Supply	Batteries
Microphone	Condenser microphone
Weighting	A and C
Time Weighting	Fast and Slow