This part of this European standard addresses non destructive testing ultrasonic systems implementing phased array linear probes, in contact (with or without wedge) or in immersion, with central frequencies in the range of 0.5 - 10 MHz. It describes methods and acceptance criteria for verifying the performance of an ultrasonic testing system (i.e. the instrument with the probe as defined in part 1 and 2 of this standard) with appropriate standard calibration blocks. The methods described are suitable for the use by operators working under site or shop floor conditions. The methods only apply to contact techniques (manual or automated) and immersion techniques (automated). The purpose is to verify, prior to an inspection, the correct operation of the complete system in use, to characterize UT beams and verify the absence of degradation in the system performance