PAT Tester Calibration

We understand the importance of getting your appliance tester calibrated with a fast turnaround time. After all, you want your downtime to be at the very minumum. That's why we make certain guarantees with regards to how long you need to wait.

When you have your tester calibrated with us, you'll be updated every step of the way. We'll inform you from the first point of contact and up until the very end where you get back your PAT tester.

If you purchased your appliance tester through us, we'll send you periodic calibration reminders to ensure your machine is looked after properly.

Calibration of your PAT tester (also known as Verification) not only ensures accuracy of the readings it provides but also identifies potential faults within the circuitry that can lead to items being passed incorrectly.

It is not uncommon for a PAT Tester to fail the calibration check because it isn’t detecting any readings and therefore passes a test it should indicate a fail. This is a serious fault that can only be identified by the calibration process and can result in appliances with excessive Earth Leakage Current being passed and returned to service. 

AS/NZS 3760:2022 states:

“The verification should be carried out against a calibrated source. It is recommended that the verification should be carried out within the timeframe specified in the manufacturer’s instructions. If the equipment has been misused or damaged, it should be re-verified immediately.”

All of our calibration equipment is independently calibrated by a NATA certified laboratory in accordance with the manufacturers requirements and industry best practice.

A recent customers experience:

A customer sent in their PAT tester for routine annual calibration check as recommended by the manufacturer. The customer reported no issues with the appliance tester at the time and they had been using it regularly to test their company’s tools.

The PAT Tester failed the Class 2 leakage test calibration check as it did not detect any leakage current, even when 19mA of leakage current was applied. After speaking with the customer, the Class 2 leakage test was the most common test they performed due to the power tools and other equipment they use in their business.

After the PAT was repaired and working correctly again, the customer had to go back and retest all of their Class 2 items again as it wasn’t unknown when the fault began. This posed a serious risk to the users of this equipment as the PAT, in its defective state, could not detect excessive leakage current when the Class 2 leakage test was performed.

The customer was very glad we identified the issue and informed them of the appropriate corrective action. 

If you'd like more information on time frames, read our guide on PAT Tester Calibrations.