The Ametek Drexelbrook DR3000 is a 4‑20 mA radar level transmitter used for continuous level measurement in process industries. Common failure modes include power supply voltage drops or noise on the loop, degraded RF signal due to misalignment or contamination of the sensor aperture, damaged cable/connectors causing high resistance or short circuits, and firmware glitches that trigger error codes such as “E2” (radar out of range) or “E3” (loop current out of range). First‑check diagnostics should verify the 24 V supply voltage and loop integrity with a multimeter, inspect the sensor aperture for debris or corrosion, test the output signal against a known good transmitter, and review any error logs via the built‑in diagnostic interface.[oss-gpt-20b]