Instrumentation Laboratory 402
Instrumentation Laboratory · Model 402
Oxygen Monitor, …
Key tips
- ·A no-signal/flatline alarm gets checked on the patient first, not the monitor - rule out a real clinical event before troubleshooting.
- ·Recalibrate NIBP against a reference manometer, not just a self-test pass.
- ·Reused patient cables (SpO2, ECG leads) are a common source of intermittent-fault complaints - swap the cable before the module.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
O2 reading inaccurate or will not calibrate
HighSymptoms: O2 % biased, drifts, or fails span calibration.
Root cause: Aged galvanic O2 cell or a paramagnetic-sensor fault; or a calibration-gas issue.
No reading / sensor not detected
MediumSymptoms: Dashes or a sensor-fault message.
Root cause: Depleted O2 cell, a cable fault, or a connector fault.
Alarm fault
MediumSymptoms: No or continuous audible alarm, alarm limits will not set.
Root cause: Speaker / audio or the alarm board - a safety function on ventilator O2 monitoring.
Battery / power fault
LowSymptoms: Short battery life, will not power on.
Root cause: Aged battery.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Galvanic O2 sensor / cell
Class Frequent wear itemRel. cost $$R&R Easy
Sensor cable
Class Periodic replacementRel. cost $R&R Fairly easy
Battery
Class Frequent wear itemRel. cost $R&R Easy
Alarm speaker / board
Class Major service partRel. cost $R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Galvanic O2 sensor / cell | Frequent wear item | $$ | Easy |
| Sensor cable | Periodic replacement | $ | Fairly easy |
| Battery | Frequent wear item | $ | Easy |
| Alarm speaker / board | Major service part | $ | Moderate |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Routine cable and lead-wire inspection for fraying/wear
- ·Battery conditioning cycle
- ·NIBP calibration check against a reference manometer
- ·ECG / SpO2 accuracy verification against a patient simulator
- ·Annual electrical safety test
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: O2 reading inaccurate / will not calibrate
- Calibrate to room air (20.9 %) and, if provided, to 100 % O2.
- Replace the O2 cell if it will not calibrate or the output has fallen.
- Check the sensor cable and connector.
- Confirm the calibration gas is correct where used.
- Verify against a second analyser.
Symptom: No reading / sensor not detected
- Reseat the sensor and cable.
- Fit a fresh O2 cell.
- Try a known-good cable.
- Confirm the module recognises the sensor.
- Refer the monitor if a good sensor and cable do not fix it.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- ICU / CCU
- Emergency Department
- OR / PACU
- General med-surg floors
- Step-down units
- Telemetry units
Documents & Manuals
No documents available for this device yet.
Safety & Recalls
Synced live from the FDA openFDA API.
- RECALL
This Lot is not meeting labeled on-board instrument stability claims of 5 days.
- RECALL
Some vials of HemosIL PT-Fibrinogen HS PLUS, Part No. 0008469810 (various lots manufactured prior to June 2014) exhibit a yellow/brownish color after reconstitution (yellow color or darker) instead of the typical white to off-white color. Vials exhibiting this yellow/brownish color were observed to cause prolonged prothrombin (PT) clotting times.
- RECALL
Falsely elevated levels may be reported with the HemosIL von Willebrand Factor Activity assay.
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