This document describes methods, tolerances and acceptance criteria for verifying the performance of combined ultrasonic test equipment (i.e. instrument, probes and cables connected) by the use of appropriate standard calibration blocks. These methods are specifically intended for manual test equipment, i.e. digital ultrasonic instruments according to ISO 22232-1 for manual ultrasonic non-destructive testing with single or dual-element probes according to ISO 22232-2. This document is applicable for multi-channel instruments also. For automated test equipment different tests can be needed to ensure satisfactory performance. These methods are not intended to prove the suitability of the equipment for particular applications. The methods described are suitable for the use by operators working under site or shop floor conditions. Ultrasonic instruments for continuous waves are not included in this document. Ultrasonic phased array systems are not included in this document, see e. g. ISO 18563-3. If a phased array instrument is used in combination with single or dual-element probes this document is applicable for this combination.