Medtronic autoLog
Medtronic · Model autoLog
2-Stage Filling Cycle [i]Initial stage[/i]. First FILL at 600 mL/min. Pump momentarily stops at initial detection of red cells [i]Final stage[/i]. Second FILL at 250 mL/min initiated after red cells settle. Red cells packed as tightly as possible Variable-speed wash cycle. Level sensor monitors red cell pack. Software controls pump "pulsations" of saline into the bowl. Minimizes red cell spillage. Only 250 mL of saline required for effective washout of extraneous materials.
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.
Machine error stops the system
HighSymptoms: System stops, control panel (and sometimes the display) rendered inoperative.
Root cause: Power-supply interruption, loss of 5 V power, or an internal processor error - power-cycle; document and call Medtronic Technical Service if it persists.
Fill-cycle / red-cell detection fault
HighSymptoms: 2-stage fill does not step down from 600 to 250 mL/min, bowl over- or under-fills.
Root cause: Optical red-cell sensor contamination or fault, or air in the line.
Centrifuge / bowl seating fault
MediumSymptoms: Bowl noise or vibration, speed error.
Root cause: Bowl not seated, worn chuck, or an unbalanced set.
Peristaltic pump / valve fault
MediumSymptoms: Flow or occlusion alarm, pump will not seat the tubing.
Root cause: Worn pump rollers/door or a valve actuator.
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.
Disposable bowl / tubing set
Class ConsumableRel. cost $R&R Easy
Optical red-cell sensor
Class Major service partRel. cost $$R&R Moderate
Peristaltic pump roller assembly
Class Periodic replacementRel. cost $$R&R Moderate
Centrifuge chuck
Class Major service partRel. cost $$$R&R Difficult
Power supply
Class Major service partRel. cost $$$R&R Difficult
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Disposable bowl / tubing set | Consumable | $ | Easy |
| Optical red-cell sensor | Major service part | $$ | Moderate |
| Peristaltic pump roller assembly | Periodic replacement | $$ | Moderate |
| Centrifuge chuck | Major service part | $$$ | Difficult |
| Power supply | Major service part | $$$ | Difficult |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
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: Machine error
- Turn the machine off and back on.
- If it restarts within 6 hours, choose YES at "RESTORE PREVIOUS STATE?" to resume, or NO for a new patient.
- If the error persists, document the type of error.
- Contact Medtronic Technical Service.
- Do not continue a procedure on a machine that keeps erroring.
Symptom: Fill cycle / bowl fill wrong
- Clean the optical red-cell sensor window.
- Check for air in the lines and re-prime.
- Confirm the correct bowl size and protocol.
- Replace the optical sensor if fill staging is still wrong.
- Run a saline test and confirm the 600 -> 250 mL/min step.