BRUEL & KJAER 2203 Instructions And Applications

8.7. INHERENT NOISE
Linear : maximum 40 J1V referred to input
A weighting : maximum 4J1V referred to input
8.8. POLARIZATION VOLTAGE
Stabilized supply of 200 V DC.
See Fig.5.9 for temperature stability .
8.9. CALIBRATION
Sound Measurements
The whole instrument can be calibrated at 124 dB (re 2011Pa) at
250Hz using the Pistonphone Type 4220 with an accuracy of± 0,2 dB,
or at 94 dB (re 20 11Pa) at 1000Hz using the Sound Level Calibrator
Type 4230 with an accuracy of ± 0,25 dB. This calibration is valid for
free-field measurements with sound incident normal to the Microphone
diaphragm.
Vibration Measurements
The 2203 can be calibrated at 1 g peak at 80Hz using Accelerometer
Calibrator Type 4291.
Internal
An internal reference voltage (square wave at approx. 1 kHz) is incor-
porated. Stability is better than ± 0,2 dB over the range of operating
temperatures . This voltage checks all stages of the 2203 after the input
stage.
8.1 0. DIRECTIONAL CHARACTERISTICS
See Chapter 5.1 and Microphone Instruction Manual for Type 4145 or
4133.
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BRUEL & KJAER 2203 Specifications

General

Brand	BRUEL & KJAER
Model	2203
Category	Measuring Instruments
Language	English