IEC 60942:2003 Class 2 & Class 1 Performance – PTB Type Approval for Class 2 & Class 1 – LNE Type Approval for Class 1 – 94dB Sound Pressure Level Output – Suitable for use with standard 1/2″ microphone capsules – Automatic power switch off with user override giving longer battery life – Robust case with ergonomic design Acoustic Calibrators Class 1 and Class 2 with Type Approval Cirrus manufactures a range of Acoustic Calibrators and adaptors suitable for the field calibration of sound level meters, noise dosimeters and other noise measurement instruments. The current range of Acoustic Calibrators comprises: – CR:515 Class 1 to IEC 60942:2003 Class 1 with PTB Type Approval – CR:514 Class 1 to IEC 60942:2003 Class 2 with PTB Type Approval CR:511F Class 1L with 94dB & 104dB @ 1kHz with PTB Type Approval – CR:514 Class 2 & CR:515 Class 1 Acoustic Calibrators The CR:514 and CR:515 are high performance acoustic calibrators designed for the field and laboratory calibration of sound level meters and other noise measurement equipment. The units are simple to operate and meet the requirements of the latest IEC 60942:2003 standard for Acoustic Calibrators with performance to Class 2 (CR:514) and Class 1 (CR:515). The CR:515 and CR:514 are the standard Acoustic Calibrators are supplied with the Cirrus Sound Level Meters and Noise Measurement Instruments. CR:511F Acoustic Calibrator The CR:511F Acoustic Calibrator meets the requirements of IEC 60942:1998 for a Class 1L instrument. It provides 94dB and 104dB sound pressure levels and can be used with a range of calibration adaptors to suit microphone capsules other than 1/2″ and 1″ diameter.