Testing An Electrolytic Capacitor Using i3070 ICT System
Application Notes
Introduction
You will learn from this application note how to use the Keysight i3070 In-Circuit Polarity test solution for an Electrolytic Capacitor (ECAP). This device mounts on a printer circuit board assembly and are tested using the i3070 in-circuit system.
There are unique styles of non-solid aluminum electrolytic capacitors available in today’s marketplace; see Figure 1. They range from Surface Mount Devices (SMDs), radial lead terminals, axial lead terminals, radial pin terminals, and large screw terminals for power applications.
The Methodology
Based on the ECAP construction, the values are estimates as shown in Figure 2. By implementing an unpowered test to verify the difference between the resistance from “+” pin to body, and from “–“ pin to body. However, it is difficult to maintain a stable and repeatable result — especially while using different device suppliers. The results may have differing values of resistance.