What is the primary purpose of a test block in PAUT?

The primary purpose of a test block in Phased Array Ultrasonic Testing (PAUT) is to simulate inspection scenarios for calibration. Test blocks are specifically designed to have known flaws or reflectors strategically placed within them. These flaws or reflectors are used to establish the baseline for the PAUT system's response to different types of defect scenarios during calibration. When technicians calibrate their equipment using these test blocks, they can adjust the system to ensure accurate detection of defects in various materials and configurations in real-world applications.

Test blocks serve as a reference point, allowing operators to familiarize themselves with the equipment's capabilities and ensure that it performs correctly under defined conditions. By using these blocks, it becomes possible to assess the sensitivity of the PAUT system and verify that it can reliably detect flaws that are indicative of actual service conditions, making them an essential tool in quality assurance and evaluation.