The ASME B89.4.19 System Calibration is a standardized method of calibrating a Laser Tracker using NIST traceable artifacts. It was officially released by the American Society of Mechanical Engineers in December 2006, several years after the FARO® Laser Tracker was developed and began production. The standard consists of a comparison of the ADM system of the Laser Tracker (and IFM system if equipped) to a NIST traceable interferometer as well as scale bar measurements at specific locations and geometries. The B89 calibration provides a more complete Laser Tracker calibration certificate then the standard certificate, it is 12 pages long and contains 6 pages of tracker measurements, but it will only be performed on a Laser Tracker after successful completion of the standard calibration. One primary reason for this is that the standard requires all the angular accuracy measurements be performed at a distance of 6 meters or closer and uses only one sized SMR. Our testing that goes along with the standard calibration method does more extensive accuracy checks at further distances with multiple sized SMR's. The B89 calibration is currently available only by special order.
b89, calibration, tracker calibration