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 IEC60942:2019

4 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 (GA612) is a class 2 product according to IEC60942:2018, with a tolerance of +/- 0.4dB and distortion of less than 3%.

Class 2 to IEC60942:2018
Less than 3% harmonic distortion
Plus or minus 0.4dB tolerance