ONO SOKKI - Sound calibrator SC-3120

The SC-3120 Sound Calibrator is a precise standard sound source of piston-phone type which accurately calibrates a sound level meter. It drives the piston in the cylinder in reciprocating motion to generate sine-wave sound having a fixed sound pressure level.

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.

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 ref. 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	Barometer Type AA dry cell battery (R6P) x 3 pcs. Microphone adapter for 1-2-inch microphone (SC-0312) Storage case