Mediaid Model 900
Mediaid · Model Model 900
LCD Display Screen for viewing waveforms. Separate LCD display for SpO2, and Pulse Rate readings. On screen display of SpO2 and Pulse Alarm limits. Rate trends for up to 24 hours (½, 1, 2, 6, 12 and 24 hours breakdown). Display Graphical Tabular trends. Bright high quality backlight screen for easy viewing. Monitors Pediatric, Adult Patients weighing above 5 kg. User configurable Power On settings. Range of disposable and reusable sensors available.
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.
No SpO2 / pulse reading or poor signal
HighSymptoms: No saturation / pulse value, "pulse search", low signal quality, implausible values.
Root cause: Worn or wrong SpO2 sensor, a damaged cable, poor site / perfusion, or motion.
Sensor / cable connector fault
MediumSymptoms: Reading drops when the cable is moved, sensor not recognised.
Root cause: Broken conductors in the sensor / extension cable, or a worn connector.
Inaccurate SpO2 vs a co-oximeter
MediumSymptoms: SpO2 consistently biased vs an arterial reference.
Root cause: Sensor degradation, or a monitor calibration / module fault.
Alarm / audio fault
MediumSymptoms: No or quiet audible alarm.
Root cause: Speaker or audio-board fault - a safety-critical failure.
Battery / power fault
MediumSymptoms: Short battery run time, 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.
SpO2 sensor (reusable / disposable)
Class Frequent wear itemRel. cost $$R&R Easy
Pulse-oximetry extension cable
Class Frequent wear itemRel. cost $$R&R Easy
Battery
Class Periodic replacementRel. cost $$R&R Fairly easy
SpO2 module / board
Class Major service partRel. cost $$$R&R Moderate
Alarm speaker / audio board
Class Major service partRel. cost $$R&R Moderate
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| SpO2 sensor (reusable / disposable) | Frequent wear item | $$ | Easy |
| Pulse-oximetry extension cable | Frequent wear item | $$ | Easy |
| Battery | Periodic replacement | $$ | Fairly easy |
| SpO2 module / board | Major service part | $$$ | Moderate |
| Alarm speaker / audio board | Major service part | $$ | 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
Error Codes
Extracted directly from this unit's own service manual.
001Module Communication Error
002RTC No Updation Error
003EEPROM Read/Write Error
004ADC Error
NO SENSORThe sensor has disconnected or removed from the oximeter, or the sensor /cable wiring is defective. Press the ALARM SILENCE Key to silence the alarm. Check the connections. If this does not correct the problem, replace the sensor and / or cable.
NO FINGERThe sensor has become disconnected from the patient. Press the ALARM SILENCE key to silence the alarm. Check the sensor to patient connection. If this does not correct the problem, replace the sensor.
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: No SpO2 / pulse reading or poor signal
- Fit a fresh, correct-size sensor on a warm, well-perfused, still site.
- Swap the SpO2 extension cable.
- Confirm the pleth / signal-quality indicator improves.
- Test the monitor with an SpO2 simulator across several saturations.
- Replace the sensor / cable, or refer the SpO2 module if the simulator also fails.
Symptom: Reading drops when the cable is moved / sensor not recognised
- Flex the sensor and extension cable along their length while watching the trace.
- Inspect the connectors for damage and clean them.
- Try a known-good cable and sensor.
- Confirm the sensor type matches the module.
- Replace the cable; refer the module connector if it persists.
Symptom: SpO2 biased vs a co-oximeter / accuracy concern
- Compare to an arterial co-oximetry result where clinically indicated.
- Try a known-good sensor of the correct type.
- Verify against an SpO2 simulator at 80 / 90 / 97 %.
- Check the module software / calibration revision.
- Refer the module for calibration if it fails the simulator.
Symptom: No or quiet audible alarm
- Confirm alarm volume is not set to minimum and alarms are not paused.
- Trigger a test alarm (remove the sensor) and listen.
- Check the speaker and its connector.
- Replace the speaker / audio board - a failed alarm is a safety fault.
- Verify the alarm at the set volume before returning to service.
Technical Specs
- Height
- 3.3 in
- Length
- 11.8 in
- Pulse Rate Range
- 25-255 BPM
- Weight
- 5.6 lbs
- SpO2 Range
- 1-100%
- Width
- 8 in
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
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