IRD Mechanalysis Model 350 is a handheld vibration analyzer and dynamic balancer that operates from 110 V AC and measures vibration amplitude (0.03–100 mm/s) and frequency (50–500 Hz) on its two input jacks when a transducer is connected. Common failure modes for this unit include loss of power or display, erratic or zero readings due to loose or corroded probe connections, and internal oscillator drift that can cause inaccurate frequency outputs; the built‑in balance function may also fail if the calibration tone generator malfunctions. First‑check diagnostics: verify 110 V supply continuity and correct polarity at the unit’s power inlet; inspect the transducer leads for breaks, corrosion, or disconnection on both input jacks; and review any displayed error codes or abnormal readings that indicate internal component faults.[oss-gpt-20b]