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Electrical Signal Input
Electrical signals can be applied to the Castle Sonus range of sound level meters
by removing the acoustical microphone and replacing with a dummy microphone
having a series capacitance of 19pF ±2%. The BNC termination is then used to
interface with a suitable signal generator with an output impedance of 600Ω at
1kHz.
Maximum Peak to Peak Electrical Signal Input For No Damage
Model
Max Input Voltage (V)
‘I’ & ‘B’
7.0
‘L’
21.0
‘E’
21.0
Upper Frequency for Periodic Acoustic Testing
4kHz - (IEC 61672-3:2006)
Windshield
The effects of using the KG205 (60mm) windshield
31.5Hz
0.0
1kHz
0.2
63Hz
0.1
2kHz
0.2
125Hz
0.1
4kHz
0.7
250Hz
0.1
8kHz
0.0
500Hz
0.2
The meter conforms to the Standards quoted when fitted with the specified
windshield.
