What is the difference between “Calibrated” and “Certified”?
It is common for the words calibrated and certified to be used interchangeably. All PGTA’s are calibrated but not all of them are certified. In order for each PGTA to comply with the standards, they are all calibrated when they are manufactured. If a PGTA is certified, this means that after the gauge has been manufactured, it is once again individually calibrated against a reference standard at a specific point or points along the scale. The results of the special calibration are recorded on an official report from Alliance. This report accompanies the PGTA during its initial shipment and a placard is placed onto the back of the gauge.
