The Metrix GM3221‑0102‑278 is a PMC/Beta vibration monitoring unit that samples and analyzes vibration signals from industrial machinery to provide real‑time fault detection. Typical failure modes include loss of signal due to damaged transducer contacts or degraded sensor wiring, power supply instability causing erratic output or reset cycles, and board-level component failures such as burnt capacitors or failed op‑amps in the analog front end. Initial troubleshooting should verify that the unit receives correct 24 V DC (or specified input) and that all signal cables are intact; check for visible damage to the PCB and test the sensor leads with a multimeter for continuity; finally review any stored fault codes or log entries via the built‑in diagnostic interface before proceeding to component replacement.[oss-gpt-20b]