29
Chapter 4
Specifications
POWER SUPPLY
Supply Voltage: 110, 115, 127, 230 or 240 V AC, 50
or 60 Hz
Power Consumption: 50 Hz: 500 VA; 60 Hz: 700 VA
SOUND POWER OUTPUT
Measured in 1/3-octaves from 100 Hz to 20 kHz:
> 70 dB re 1 pW
A-WEIGHTED SOUND POWER OUTPUT
(NOMINAL)
91 dB re 1 pW @ 50 Hz line frequency
95 dB re 1 pW @ 60 Hz line frequency
A-WEIGHTED SOUND PRESSURE LEVEL
Nominal; diffuse field in a room with an equivalent
absorption area of 10 m
2
87 dB(A) @ 50 Hz line frequency
91 dB(A) @ 60 Hz line frequency
VARIATION OF SOUND INTENSITY WITH
DIRECTION:
(10 Hz to 10 kHz measured in 1/3-octaves under free-
field conditions)
Vertical Plane: < 6 dB
Horizontal Plane: < 0.2 dB
VARIATION OF SOUND POWER OUTPUT
With Supply Voltage: (± 10% (50 Hz) and ± 5%
(60 Hz) of nominal voltage): < ± 0.2 dB @ 50 Hz line
frequency
< ± 0.3 dB @ 60 Hz line frequency
With Barometric Pressure: Sound power output is
proportional to barometric pressure at a constant
speed of rotation
FREQUENCY OF ROTATION
Nominal
48 Hz @ 50 Hz line frequency
56 Hz @ 60 Hz line frequency
The frequency of rotation during calibration is given on
the calibration certificate
DIMENSIONS
Height: 300 mm (11.8″)
Diameter: 300 mm (11.8″)
Weight: 21 kg (46 lb)
CALIBRATION
Maximum time between calibrations: 24 months
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