GASTRON Oxygen Gas Detector Fault? Sensor Replacement + Zero & Span Calibration Explained

⚙️ Oxygen Sensor Over-Range Alarm? Here’s a Real Onboard Troubleshooting Case. In this video, I walk you through an actual fault we faced onboard when the oxygen gas detector suddenly showed an over-range alarm. This is a critical situation that cannot be ignored, as oxygen monitoring is directly linked to safety. Instead of blindly replacing the sensor, we followed a systematic troubleshooting approach — and in this video, I’ll show you exactly how we diagnosed the issue step by step. 🔍 What you’ll learn in this video: • How to identify an oxygen sensor over-range condition • Why zero and span calibration may fail • How to check sensor ST voltage (key diagnostic step) • Complete oxygen sensor replacement procedure • Zero calibration using nitrogen gas • Span calibration using atmospheric air (20.9% O₂) • Final system verification and restoration ⚠️ This is not just theory — this is a real practical case from onboard experience. If you are a marine engineer, ETO, or working with gas detection systems, this video will help you troubleshoot faster and avoid costly mistakes. 📌 Key Takeaway: A low ST voltage is a strong indication of a faulty or expired sensor — and proper calibration is essential after replacement. 👍 If you found this useful: Like • Share • Subscribe to Dead Slow Ahead for more real-world marine engineering troubleshooting content. #OxygenSensor #GasDetector #Troubleshooting #MarineEngineering #ShipEngineer #calibrations #EngineRoom #MarineLife #ETO #Instrumentation #IndustrialSafety #ProcessControl #automationengineering #HowToFix #StepByStep #RealCase #Technical #engineeringlife #calibrations #Spancalibration #Zerocalibration