Air oxygen blenders · O2 Generation family

Bio-Med Devices Air/Oxygen Blender: troubleshooting and error codes

The ServiceForge knowledge base holds 6 documented symptoms for the Bio-Med Devices Air/Oxygen Blender, with 14 ranked causes, 11 diagnostic checks with test points and expected values, and 0 error codes. Each symptom below shows its causes and the first check; the rest is one connection away. Connect ServiceForge to your AI

Symptoms

Blender is alarming patient safety

Alarm condition activated on the blender

Ranked causes

1. Air and oxygen source pressures differ by more than 20 PSI (common)
2. Alarm system out of calibration (occasional)
3. Dirty gas contaminating alarm system (occasional)
4. Pressure balance chamber not working properly (rare)

First check

Verify source pressure differential

Test point: Air and oxygen source inlet pressures
Expected: Within 20 PSI of each other

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Oxygen analyzer reading does not agree with blender setting

Analyzer output does not match the oxygen concentration set on the blender

Ranked causes

1. Oxygen analyzer out of calibration (common)
2. Blender out of calibration (common)
3. Bleed orifice on bottom of blender restricted (occasional)
4. Air introduced after blender diluting concentration (occasional)

4 corrective actions and part numbers are in ServiceForge. Connect ServiceForge to your AI

Blender does not alarm on supply loss patient safety

Alarm circuit fails to activate when air or oxygen supply pressure is lost

Ranked causes

1. Air supply pressure loss (common)
2. Oxygen supply pressure loss (common)

First check

Verify air supply pressure present

Test point: Air inlet
Expected: Supply pressure available

1 more check with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Blender output concentration incorrect patient safety

Oxygen concentration at blender outlet does not match set percentage within tolerance

Ranked causes

1. Blender needs calibration adjustment (common)
2. Analyzer not stabilized (occasional)

First check

Allow analyzer to stabilize after setting blender concentration

Test point: Analyzer display
Expected: Steady reading maintained

3 more checks with pass and fail actions, 2 corrective actions, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Calibration: Air/Oxygen Blender patient safety

Periodic preventive maintenance to ensure continued proper operation including performance testing, cleaning, and calibration

Ranked causes

1. Scheduled maintenance interval due (common)

First check

Perform performance test prior to each use

Test point: Blender outlet
Expected: Correct gas mixture delivery

2 more checks with pass and fail actions, 1 corrective action, and part numbers are in ServiceForge. Connect ServiceForge to your AI

Gas inlet filters clogged

Air or oxygen supply inlet filters become restricted or clogged, affecting gas flow

Ranked causes

1. Contaminated compressed gas source or environmental debris (occasional)

First check

Inspect inlet filter elements

Test point: Air and oxygen supply inlet fittings
Expected: Clear, unobstructed filter elements

1 corrective action and part numbers are in ServiceForge. Connect ServiceForge to your AI

Community

0 fixes logged by technicians through their AI, with outcomes, for this model.

ServiceForge knowledge base record. Field-unverified unless technicians confirmed it. A teaching summary of the record, not a service manual. Export 2026-10-14.