This document specifies the acceptance tests for verifying the performance of a laser tracker by measuring calibrated test lengths, according to the specifications of the manufacturer. It also specifies the reverification tests that enable the user to periodically reverify the performance of the laser tracker. The acceptance and reverification tests given in this document are applicable to laser trackers utilizing a retroreflector, or a retroreflector in combination with a stylus or optical distance sensor, as a probing system. Laser trackers that use interferometric measurement (IFM), absolute distance measurement (ADM) or both can be verified using this document. This document can also be used to specify and verify the relevant performance tests of other spherical coordinate measurement systems that use cooperative targets, such as “laser radar” systems. NOTE Systems which do not track the target, such as laser radar systems, will not be tested for probing performance. This document does not explicitly apply to measuring systems that do not use a spherical coordinate system. However, interested parties can apply this document to such systems by mutual agreement. This document specifies: — performance requirements that can be assigned by the manufacturer or the user of the laser tracker; — the manner of execution of the acceptance and reverification tests to demonstrate the stated requirements; — rules for proving comformity; — applications for which the acceptance and reverification tests can be used.