Most Measurement codes of practice and legislative guides demand that an independent acoustic calibration of any sound level meter should be made before and after a series of measurements and the Castle dBCal Calibrators provide just that facility. They all produce a calibration tone of 1kHz at levels of 94dB, 104dB or 114dB at the microphone. They are designed to fit standard 1/2 microphones. These calibrators fully comply with IEC60942:2018
3 output Levels – 94dB, 104dB and 114dB Fully compliant with IEC60942:2018 Output frequency of 1KHz Temperature and pressure compensated Simple operation Compatible with Castle auto-cal feature Tough ABS plastic case Works on 2 x AA batteries 70-hour battery life. cavity diameter
The dBCal (GA611) is a class 1 product according to IEC60942:2018, with a tolerance of +/- 0.25dB and distortion of less than 1%.
Class 1 to IEC60942:2018 Less than 1% harmonic distortion Pluss or minus 0.25dB tolerance