Keep your OH&S records up to date by requesting a calibration certificate each time you have your breathalyser serviced.

The calibration certificate lists the calibration date, model, serial number etc and is signed by a Certified AS3547 Technician. Don't get caught at audit time by not having the correct paperwork on hand. Order your certificates as you go. They are also an excellent reminder of when your next recalibration is due. A4 size certificate.