Sound Level Calibration
2
3. Features
Conforms to ANSI S1.4-1984 and IEC
60942-2003 Class 2.
Calibration levels of 94dB and 114dB.
Fits 1 inc h and 1/2 inch diameter microphone.
4. Specifications
Output sound pressure levels:
94dB and 114dB re 20 uPa under reference
conditions.
Output frequency:
/- 2%
Reference conditions:
Temperature :23°C (74°F)
Relative humidity: 50%
Atmospheric pressure: 1013hpa
Influence of ambient conditions:
Temperature coefficient: 0.005dB/
?
Humidity coefficient: 0.005dB/%RH
Total Harmonic Distortion (THD):
<3%
Accuracy of sound pressure level:
+/- 0.5dB
Power:
one 9V battery 006P or IEC 6F22 or
NEDA 1604.
Battery life:
approx.40 hours (Alkaline Battery)
Battery test:
Internal circuitry checks condition of battery
continuously.
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