When you're ready to take noise measurements, it's strongly recommended that you perform a field calibration using an Acoustic Calibrator. You should calibrate your sound meter before you start to measure, and then once you've finished you should perform a reference check against the calibrator and make note of any drift that has occured. You can find out more about performing Field Calibrators by reading this post and watching a short video.
LAB23, the latest guidances from the United Kingdom Accrediation Service (UKAS), states the recommended calibration intervals for different types of measuring equipment, including:
For a professional calibration and repair service with a fast turnaround, contact Castle Calibration or visit www.castlecalibration.com and search for your equipment.
This is the Class 2 Acoustic Calibrator, which is very small and housed in a rugged case which makes it easy to transport and keeps damage to a minimum. It is important that the kits are re calibrated before and after the results are taken because the results may be distorted if the meters are not reading correctly and therefore you may not comply to the work regulation standards. The class two has a lower accuracy than the class one calibrator, so it depends what type of accuracy is needed for the job. The technical specification shows the accuracy levels.
|Class||Class 1, Class 2|
The Castle GA601 produces a calibration tone of 1000Hz at a level of 94dB re 20µPa at the microphone. The GA601 Acoustic Calibrator comes with a 12 Month Manufacturers Calibration with Certificate, however if you require UKAS Calibration this can be added below.