Details of calibration value/correction amount when calibrated by SC-2500

When you perform calibration of microphones or sound level meters made by Ono Sokki with the SC-2500 Sound Calibrator, please calibrate so that the displaying value of the display device that microphone is connected or of the sound level meter matches the following calibration value.
When you use the value described in the test certificate after SC-2500 calibration, add the correction value to the described value.

 

Calibration procedure of microphone or sound level meter using SC-2500

1. Check that the power of the calibrator is turned OFF, and gently insert the microphone or sound level meter gently all the way in.

2. Turn the power of the calibrator ON, and check the displayed value after a waiting a few seconds.

3. Check the difference between the displayed value and the value in the following table. Adjust the value if necessary.

4. After the check, turn the power of the calibrator OFF, and gently pull out the calibrator.

■ Calibration value of Sound field type microphone(with protection grid)

Microphone Model name Conditions Calibration value (dB) Correction amount (dB)
Current model MI-1271 With protection grid 113.8 -0.2
MI-1235 With protection grid 113.9 -0.1
MI-1433 With protection grid 114.0 0.0
MI-1531* With protection grid 114.1 0.1

Values when the adapter SC-0313 is installed to the SC-2500.

 

Microphone Model name Conditions Calibration value (dB) Correction amount (dB)
Previous model (discontinued) MI-1211 With protection grid 113.8 -0.2
MI-1233 With protection grid 113.8 -0.2
MI-1234 With protection grid 113.8 -0.2
MI-1431 With protection grid 114.0 0.0
MI-1432 With protection grid 114.0 0.0

 

■ Sound Level Meter and Calibration value

Sound Level Meter Model name Microphone used Calibration value (dB) Correction amount (dB)
Current model LA-4441  (MI-1235) 113.9 -0.1
LA-1441 (MI-1433) 113.9 -0.2
LA-1411 (MI-1433) 113.9 -0.1
LA-7500 (MI-1271) 113.9 -0.1
LA-7200 (MI-1471) 113.9 -0.1

 

 Sound Level Meter Model name Microphone used Calibration value (dB) Correction amount (dB)
Previous model (discontinued) LA-4440  (MI-1234) 113.9 -0.1
LA-1440  (MI-1432) 114.0 0.0
LA-1410 (MI-1234) 113.9 -0.1
LA-3570 (MI-1211) 113.9 -0.1
LA-3560  (MI-1235) 113.9 -0.1
LA-3260  (MI-1433) 113.9 -0.1

 

 

Revised:2017.11.27



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