A Biomedical Engineer’s Guide to Troubleshooting Low Oxygen Purity (Part 2)
Introduction
For biomedical engineers and technicians, a low oxygen purity alarm on a concentrator is a critical signal that demands a swift and accurate response. Building on our previous discussion in Part 1, this article focuses on advanced diagnostic steps, specifically targeting the pressure control board, to resolve purity issues and ensure patient safety. This guide provides a systematic approach to troubleshooting, helping you isolate and rectify faults with confidence.
Troubleshooting the Pressure Control Board
When an oxygen concentrator continues to show low purity alarms after initial checks, the pressure control board often becomes a key area of investigation. This component is central to the Pressure Swing Adsorption (PSA) cycle, regulating the timing and flow that are essential for nitrogen removal.
- Initial Verification: Confirming that the alarm is not due to external factors like incorrect flow meter settings or leaks in the patient circuit.
- Pressure Transducer Analysis: Assessing the functionality of the pressure transducer, which sends critical data to the control board. A faulty transducer can mimic low purity conditions by sending inaccurate signals.
- Control Board Inspection: A thorough visual inspection of the control board for any signs of damage, such as burnt components or corroded traces, which could impair its function.
- Functional Testing: The video demonstrates how to safely power the unit and observe the control board’s behavior during a cycle, helping to confirm if it is correctly managing the PSA process.
Ensuring System Integrity
Resolving low oxygen purity is about more than silencing an alarm; it is about guaranteeing the therapeutic efficacy of the medical oxygen supplied. A systematic troubleshooting process ensures every component is performing to specification.
Watch the full guide here: How to Deal With Low Oxygen Purity: Part 2