ISO 18563-2:2017 specifies the characterization tests performed at the end of the fabrication of a phased array probe. It defines both methodology and acceptance criteria. ISO 18563-2:2017 is applicable to the following phased array probes used for ultrasonic non-destructive testing in contact technique (with or without a wedge) or in immersion technique, with centre frequencies in the range 0,5 MHz to 10 MHz: a) non-matrix array probes: - linear; - encircling; - partial annular sectorial (type "daisy"); b) 2D-matrix array probes. ISO 18563-2:2017 does not give methods and acceptance criteria to characterize the performance of an ultrasonic phased array instrument or the performance of a combined system. These are given in ISO 18563?1 and in ISO 18563?3.