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.
60942:2003 Class 1/C
JIS C 1515:2004 Class 1/C
|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)|