Acoustic Calibrators
All Cirrus Research plc instruments, from the simple handheld Sound Level Meters, to the Airport and Environmental Noise Analysers are manufactured to meet the requirements of the relevant international standards.
The CR:514, CR:515 and CR:511F Acoustic Calibrators all carry PTB Type Approval.
In addition to this, all instruments are factory calibrated to ensure that the overall measurements are correct, and within the tolerances demanded by the standards. For further details of the additional calibration services available, please click here.
The calibration consists of electrical testing of the system to the appropriate accuracy, followed by a final acoustic calibration before the instrument is shipped to the customer.
To ensure that the acoustic calibration is accurate, Cirrus Research plc hold a set of reference equipment. This comprises a reference microphone capsule and a reference pistonphone. Neither of these units are used for the actual calibration of equipment, but are used to provide "transfer standards" and "factory calibration standards" which are used for the final calibration.
This allows the reference units to be used as little as possible, ensuring stability and traceability of the measurements.
The calibration certificate provided with the instruments is a statement of the calibration, and allows the customer to be certain that the instruments will measure the correct levels.
Cirrus Research plc can also offer an additional calibration service. This will provide a UKAS (NAMAS) accreditied calibration certificate, intially for the Class+ microphone capsules and the CR:515 and CR:514 Acoustic Calibrators . Please note that this service is only available once the standard Cirrus Research plc factory calibration has been completed.
After purchase, equipment should be regularly recalibrated by a suitable laboratory to maintain the confidence in any measurements being made. All equipment returned to Cirrus Research plc for recalibration is subject to the same procedures as new equipment.
Cirrus Research plc also provide a range of Acoustic Calibrator and adaptors suitable for the field calibration of instrumentation manufactured by the company.
Currently these include:
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
The Type Approval for the CR:511F Acoustic Calibrator is for use with 1/2" microphone capsules. A calibrated barometer, the CR:590 is also available for use with the CR:511F.
All of these Acoustic Calibrators are available for OEM specification and can be modified to suit customer requirements.
Links: - Product Information: CR:510 Series Acoustic Calibrators Technical Specifications
- Product Datasheets: CR:515 & CR:514 Acoustic Calibrators Datasheet English (PDF)
- Product Datasheets: CR:515 & CR:514 Acoustic Calibrators Datasheet German (PDF)
- Product Datasheets: CR:515 & CR:514 Acoustic Calibrators Datasheet French (PDF)
- Product Information: CR:515 & CR:514 PTB Type Approval Certificate (PDF)
- Applications: Special Applications & OEM Products
