UT - Equipment Linearity Checks

In this video, we explain how to perform linearity checks on Ultrasonic Testing (UT) equipment to ensure accurate and reliable thickness and flaw detection measurements. This is a key calibration procedure required in ASME, ISO 16810, ISO 22232, ASTM E317/E2491, and other NDT standards.

👉 What You Will Learn:

What linearity means in Ultrasonic Testing

Horizontal and vertical linearity: what they are and why they matter

How to verify amplitude linearity and distance (time-base) linearity

Equipment and calibration blocks used (IIW/V1 block, step wedge, reference blocks)

How to interpret results and acceptable tolerances

Common errors and troubleshooting tips

🎯 Why This Is Important:
Incorrect linearity affects flaw sizing and thickness measurements, leading to wrong inspection decisions. Performing regular linearity checks ensures your UT instrument is accurate, calibrated, reliable, and compliant with code requirements.

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