Details

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ST-120  Sound Level Calibrator

 
According to standard: ANSI S1.4 - 1984 and IEC 942 1988 class 2

 

Application

The ST-120, Sound Level Calibrator, is used for the calibration of the pressure sensitivity of the microphone and sound level measuring equipment.
The design  is based on a feedback arrangement to ensure 
a high stable sound pressure level.  The performance is very stable; it does not required for the revision to the microphone equivalent volume.  conforms to the standard of IEC60942 (2003) Class 1.

 

Features

• Setting standard sound levels at 94dB and 114dB.
• ½” microphone adapters provided.
• With low battery indictor.
• Harmonic waves distortion ±3%.
• Output feedback detection.

 

Specifications

 

Standard	IEC 60942(2003) and ANSI S1.40. (1984)
Sound Pressure Levels	94 and 114Db.(reference of 2x10-5Pa)
Accuracy	94 ± 0.3dB and 114 ± 0.5dB
Frequency	1000Hz ± 1%.
Distortion	≤ 3 %
Dimension	φ62x134mm
Weight	about 350g  (included 1/2" adaptor and 9V battery)
Stable Times	20s.
Humidity	＜90%
Atmospheric Pressure	65KPa~100KPa