Calibration of PAT Testers
As PAT testers are sophisticated instruments, it is important to make sure that they are continuing to measure correctly. If a company fails to check and maintain calibration, it could face difficulty substantiating any measurements in the event of a claim. It is usually recommended that calibration is carried out annually on a PAT testing unit.
When a PAT Tester is calibrated it is re-configuring it to match the original specification. This includes:
- Calibrating the unit back to national standards. This is best performed by the product manufacturer (if they offer a calibration service) or a laboratory accredited by UKAS
- If it is mains powered, then a safety test must be carried out.
- A calibration certificate should be issued to prove the PAT unit has been electrically tested.
Dual purpose checkboxes have also been introduced which are capable of validating the accuracy of both electrical installation testers and portable appliance testers.
Read more about this topic: Portable Appliance Testing
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—Anne Sexton (1928–1974)