Medical International Research Spirolab II
Medical International Research · Model Spirolab II
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.
Flow / volume readings out of tolerance
HighSymptoms: 3-L syringe calibration check fails, FVC/FEV1 drift, erratic loops.
Root cause: Debris or moisture in the turbine flow head, a damaged turbine, or use of a non-MIR turbine.
Device does not switch on
MediumSymptoms: Nothing on power-up on internal battery.
Root cause: Internal battery pack below ~6 V, or an internal power-supply fault (5 V rail).
Self-test fault reported
MediumSymptoms: Error on the display or printer during the ~3 s power-on self-test.
Root cause: A subsystem flagged during self-test - refer to the functional-test section.
Thermal printer fault
LowSymptoms: No printout, faint print, paper jam.
Root cause: Worn print head or paper handling.
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.
Reusable turbine flow head (MIR)
Use only MIR turbines; disposable turbines are single-patient.
Class Periodic replacementRel. cost $$R&R Easy
Internal battery pack (6-8 V)
Class Periodic replacementRel. cost $$R&R Moderate
Battery charger / power supply
Class Periodic replacementRel. cost $R&R Fairly easy
Thermal print head and paper
Class Periodic replacementRel. cost $R&R Fairly easy
3-L calibration syringe
Class Major service partRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Reusable turbine flow head (MIR) Use only MIR turbines; disposable turbines are single-patient. | Periodic replacement | $$ | Easy |
| Internal battery pack (6-8 V) | Periodic replacement | $$ | Moderate |
| Battery charger / power supply | Periodic replacement | $ | Fairly easy |
| Thermal print head and paper | Periodic replacement | $ | Fairly easy |
| 3-L calibration syringe | Major service part | $$ | Easy |
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: Calibration check fails
- Fit a clean/known-good MIR turbine and dry the flow path.
- Repeat the 3-L syringe check with smooth full strokes.
- Confirm the environmental / BTPS settings.
- Replace the turbine if it still fails.
- If the fault persists, send the unit to the manufacturer.
Symptom: Will not switch on
- Connect the charger and confirm the jack is fully seated and the cable is undamaged.
- Open the unit (per the manual) and measure the battery pack: 6 V (low) to 8 V (full).
- Check the 5 V internal supply rail.
- Replace the battery pack or charger as found.
- Re-run the power-on self-test.