The SC-3120 is applicable to IEC 60942:2003 Class 1/C (JIS C1515:2004 Class 1/C) and calibrates a sound level meter with high accuracy and stability.
It is used for calibration of Class 1 or Class 2 sound level meter and sound measurement instruments including microphone which is used for sound power level measurement.
Features
Overview specification
| Applicable standard | IEC
60942:2003 Class 1/C JIS C 1515:2004 Class 1/C |
|---|---|
| Method | Piston-phone |
| Applicable microphone | 1/2-inch microphone (MI-1211/1233/1234/1431/1432) 1/4-inch microphone (MI-1531*) * The adapter which is provided as standard with the MI-3140 preamplifier for MI-1531 is required in use. |
| Nominal sound pressure level | 114 dB re. 20 μPa |
| Generated sound pressure level | 114 dB ± 0.4 dB (at 23 °C/50 % RH/ atmospheric pressure of 101.325 kPa ) |
| Distortion rate | 2.5 % or less |
| Nominal frequency | 250 Hz |
| Generated frequency | 250.0 Hz ± 0.4 % |
| Output stabilizing time | 30 seconds or less after a microphone is inserted. |
| Operation mode | Automatic stop mode (approx. one minute) or continuous mode |
| Operating temperature range | -10 to +50 °C |
| Storage temperature range | -20 to +70 °C (except for batteries) |
| Operating humidity range | 25 to 90 % RH (with no condensation) |
| Storage humidity range | 10 to 90 % RH (except for batteries) |
| Atmospheric pressure range | 65 to 108 kPa |
| Power requirement | Type AA dry cell battery (R6P or LR6) x 3 pcs. |
| Battery life | Approx. 2.5 hours (when using R6P type AA dry cell batteries at 25 °C) |
| Piston life | Approx. 80 hours(at 25 °C) |
| Outer dimensions | 60 (W) × 38 (H) × 200 (D) mm |
| Weight | Approx. 600g (not including batteries) |
| Accessories |
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Revised:2009/12/25
