How to Use Surface Insulation Resistance (SIR) Testing for Cleaner Circuit Boards
In this Ask Dr. Adam video, you’ll learn how SIR works, why it’s crucial for qualifying your cleaning processes, and how to interpret SIR plots to ensure your circuit boards meet IPC standards.
Dr. Adam leads you through the process of SIR testing, from using specialized coupon boards with interdigitated traces to identifying and addressing potential causes of failure, such as ionic contamination and flux residues. You’ll see what a passing SIR value looks like (10⁸ ohms or higher) and how to troubleshoot issues by examining failing components.