ND9A ND9B Digital Sound Level Calibrator 94dB 114dB for 1/2" 1" Microphone Calibration
- Quick and easy calibration of sound level meters and sound measuring systems
- Sensitivity calibration for 1" and 1/2" microphones
- Suitable for both field and laboratory use
- Solid state integrated circuitry for accurate and stable performance
- Simple display and key operation (ND9B model)
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Model |
ND9A |
ND9B |
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Standards |
GB/T15173, IEC942 |
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Sound Pressure |
94 dB and 114 dB |
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Accuracy |
0.5 dB |
0.3 dB |
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Frequency |
1000±0.01% Hz allows calibration with A,B,C or D weighting networks or linear. |
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Applications |
Calibration of 1" and 1/2" microphones |
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Temperature Coefficient |
0 to 0.01 dB/°C |
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Altitude Effects |
Approximately 0.1dB decrease for each 2000 feet increase in altitude from sea level to 12,000 feet elevation, or comparable atmospheric pressure change (approximately every 50mm of Hg decrease). |
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Temperature Range |
-10 to +50°C(operating) |
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Power Supply |
1x9V 6F22 Battery |
4x1.5V AAA (UM-4) |
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Dimensions |
142x47x47mm |
137x51x51mm |
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Weight |
275g |
200g |
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Accessories:
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Standard Accessories |
Main Unit |
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Carrying Case(B07) |
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Operation Manual |
- Dual calibration levels: 94dB and 114dB
- Compatible with 1/2" and 1" microphones
- Backlight display for low-light conditions
- Portable design for field use
- Stable solid-state circuitry
- Simple operation with clear display
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