Sound Calibrator
SC-2500A / SC-2120A

About Sound Calibration

What is a sound calibrator?

It is necessary to ensure that the sound lever meter indicates correct sound level for correct measurement. A sound calibrator that generates predetermined sound pressure is used to check a sound level meter. There are two types of sound calibrator, piston-phone type and speaker type. They generate the sound with different sound pressure level and different frequency. They are classified based on the performance into Class 1, Class 2 etc. and the specifications are determined in the standards (JIS C 1515, IEC 60942).

Important points for using calibrator

The calibration sound pressure level may be different depending on the type of the microphone. Be sure to check the calibration sound pressure level in the instruction manual before performing calibration.
A Class 1 Sound Calibrator is recommended for a Class 1 (or type 1) Sound Level Meter and microphone.
Periodical calibration of a sound calibrator is necessary to secure its performance. Calibration of once a year is recommended. Please contact us for more details.

Features

SC-2500A

Conforms to IEC 60942:2017 Class 1, ANSI S1.40-2006 (R2011) Class 1, JIS C 1515:2020 class 1
Used for calibration of Class 1 and Class 2 Sound level meter
Since the SC-2500A uses the sound pressure feedback control method to control fluctuations in sound pressure caused by static pressure, it can generate a stable sound pressure even if the operating environment changes.
Cost-effective model

SC-2120A

Conforms to IEC 60942:2003 Class 2, JIS C 1515:2004 class 2
Dynamic speaker type
Simple type for quick operation check, cost-effective model

Specification

Model name	SC-2500A	SC-2120A
Applicable standards	JIS C 1515:2020 Class 1 IEC 60942:2017 Class 1 ANSI S1.40-2006 (R2011) Class 1	JIS C 1515:2004 Class 2 IEC 60942:2003 Class 2
Method	Speaker	Speaker
Compatible products	1/2-inch microphone : MI-1235/1271/1281^1/1433 1/4-inch microphone : MI-1531^2 High performance Sound Level Meter : LA-7200/7500/7700 Sound level meter : LA-1411/1441A/4441A	1/2-inch microphone : MI-1431/1432/1433
Sound pressure level	Nominal sound pressure level : 114 dB Deviation of sound pressure level:± 0.20 dB or less^*3	Nominal sound pressure level : 94 dB Deviation of sound pressure level:± 0.5 dB or less^*3
Total distortion	0.5 % or less^*3	0.5 % or less
Frequency	Nominal frequency :1000 Hz Frequency deviation : ± 0.1 % or less^*3	Nominal frequency :1000 Hz Frequency deviation : ± 1 % or less^*3
Operating environment	Air temperature : -10 to 50 °C (with no condensation) Static pressure : 65 to 108 kPa Relative humidity: 25 to 90 % (Excluding a combination of air temperature and humidity that exceeds dew-point temperature of 39 °C or higher.)
Power requirement	Type AA battery (LR6 or HR6) × 2	9V flat battery (6F22 or 6LR61) × 1
Battery life	10 hours or more continuous operation (when using LR6)	20 hours or more continuous operation (when using 6F22)
Outer dimensions (not including protruded section)	84 (W) × 53 (H) × 76 (D) mm	52 (W) × 45 (H) × 130 (D) mm
Weight	Approx. 220 g (including 2 battery cells)	Approx. 300 g (not including battery cells)
Accessory	Instruction manual (J, E, C) × 1 Type AA battery (LR6) × 2 Protection cover for coupler × 1	Instruction manual × 1 9V flat battery (6F22) × 1

*1: This product is discontinued.

*2: SC-0313 adapter attached to MI-3140 1/4-inch preamplifier is required.

*3: The value under the standard environment (standard environmental condition:air temperature: 23 °C, static pressure: 101.325 kPa, relative humidity: 50 %)

Related information

Revised:2023/01/17

Sound Calibrator SC-2500A / SC-2120A