The GA607 meets the demanding standards of a class 1 calibrator. It features two calibration levels, 94dB and 104dB re 20µPa both at 1kHz. It is for use with ½” microphones. Using the GA607, a sound level meter can be checked at two meter scale points and usually on two ranges.
IEC 60942 states that for a calibrator to be used in the Class 1 category, it must be corrected for barometric pressure. The Castle GA690 barometer is supplied with the GA607 Class 1/C calibrator for just this purpose. With a simple readout on the clear display and a correction table printed on the reverse, this is a simple process.
GA607 Calibrator Specifications
Applicable Standards: IEC60942:2003 Sound Calibrators, Class 1/C.
Output: 94dB or 104dB relative to 20µPa
Nominal Sound Pressure level at 101.3kPa (760mm Hg) 23° & 50%RH
Tolerance: ± 0.3dB
Harmonic Distortion: < 3%
Temperature range: -10°C to 50°C
Batteries:
2 x 3V CR2032 (Coin Cell)
Life: approx. 70 hours
Dimensions:
Cavity diameter: ½" microphone standard
Length: 140mm,
Diameter: 51mm
Weight: 230gms
GA690 Specifications
Measuring Range: 0 to 1300mbar (0 to 975mmHg)
Resolution: 1mbar, 1mmHg
Accuracy: ±0.25% FS hysteresis and linearity
Battery: 9V Alkaline type 6LR61 (PP3)
Battery life: Greater than 2500 hours
Dimensions: 106 x 67 x 30mm (LxWxH)
Weight: 135g incl. battery
Applicable Standards: IEC60942:2003 Sound Calibrators, Class 1/C.
Output: 94dB or 104dB relative to 20µPa
Nominal Sound Pressure level at 101.3kPa (760mm Hg) 23° & 50%RH
Tolerance: ± 0.3dB
Harmonic Distortion: < 3%
Temperature range: -10°C to 50°C
Batteries:
2 x 3V CR2032 (Coin Cell)
Life: approx. 70 hours
Dimensions:
Cavity diameter: ½" microphone standard
Length: 140mm,
Diameter: 51mm
Weight: 230gms
GA690 Specifications
Measuring Range: 0 to 1300mbar (0 to 975mmHg)
Resolution: 1mbar, 1mmHg
Accuracy: ±0.25% FS hysteresis and linearity
Battery: 9V Alkaline type 6LR61 (PP3)
Battery life: Greater than 2500 hours
Dimensions: 106 x 67 x 30mm (LxWxH)
Weight: 135g incl. battery
