Where do I get my test equipment calibrated and how often?

The RPZ AIM requires RPZ test kits to conform with a minimum specification, which includes being calibrated by a pressure calibration service accredited by UKAS. Please refer to the UKAS website for details of accredited organisations.

1. The accreditation schedule for the calibration organisation should include calibrating pressure differential measuring equipment in units of at least 1 kPa (or equivalent) or 0.5 kPa (or equivalent) as appropriate.

2. The RPZ test equipment should have an accuracy tolerance of: • Mechanical test equipment only of ±1.378 kPa (or equivalent) • Digital test equipment only ± 1 kPa (or equivalent)

3. Calibration certificates shall include details of the accuracy for differentials at 0.5 kPa (where appropriate), 7 kPa, 14 kPa and 34 kPa.

Test kits should be calibrated at least annually or, where specified by the kit manufacturer more frequently.