BRUEL & KJAER 2203 Instructions And Applications

crophone, or use the half-inch Microphone for better omni-directivity.
Alternatively, a pressure response microphone fitted with its normal
protecting grid can be used for random or semi-random fields.
4. Calibrate the 2203 before use to ensure correct, reproducible results.
5. Keep notes on measurement conditions, equipment and accessories
used,
background noise levels, weighting networks and meter func-
tions used.
6. Special attention should be paid to the procedure outlined below to
ensure operation without input overload.
7 . To make high accuracy measurements in accordance with the stand-
ards of IEC 1 79 or DIN 45 633 parts 1 and 2, the 2203 must be
used with the following accessories :
Extension Rod
Adaptor
One-inch Microphone
Random Incidence Corrector
or
Extension Rod
Half-inch Microphone
UA 0196
DB 0375
4145
UA 0055
UA 0196
4133
3.3.2. Specific Sound Measurement Procedure
1. Calibrate the 2203 as described in Section 3. 2.
2. Set METER SWITCH to "Lin . ", "Fast" .
3. Set OUTPUT . ATIENUATOR (transparent) at minimum gain (fully
clockwise, red lines opposite black dot).
4 .
Adjust INPUT ATIENUATOR (black) for the highest possible meter
reading without overdeflection .
5.
Set METER SWITCH to desired weighting network and meter damp-
ing.
6.
If necessary, turn OUTPUT ATIENUATOR (transparent) anti-clockwise
to obtain a meter deflection between 0 and + 10 dB (Do not adjust
the INPUT ATIENUATOR at this stage since it may result in input
overload).
17

BRUEL & KJAER 2203 Specifications

General

Brand	BRUEL & KJAER
Model	2203
Category	Measuring Instruments
Language	English