QRS Diagnostic Orbit
QRS Diagnostic · Model Orbit
The QRS Orbit spirometer provides effective diagnostic tests and meets the following Standards: American Thoracic Society (ATS/ERS) 2005 Standard. British Thoracic Society (BTS) Standard. National Institute for Health & Clinical Excellence (NICE) Guidelines. Lung Age Calculation: Lung age is calculated for patients ages 20-84. It is equal to the predicted FEV1 that matches the patients actual FEV1. Lung age may differ based on the predicted equation chosen. Patented, Pre-Calibrated Mouthpiece: With the Orbit spirometer system, everything the patient touches is thrown away. No sterilization or calibration is necessary, saving time for nurses, therapists, and physicians. No Batteries Required: The Orbit draws its power from the PC it is connected to by USB port.
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: Calibration-check verification fails, FEV1 / FVC values drift versus a 3-L syringe.
Root cause: Debris or moisture in the flow path, or a mouthpiece/sensor outside its pre-calibrated tolerance.
No connection to the host PC
HighSymptoms: Software does not detect the Orbit, no live trace, device appears unpowered.
Root cause: USB cable or port fault (the Orbit is bus-powered), driver issue, or a damaged USB connector on the device.
Pre-calibrated mouthpiece seating / recognition fault
MediumSymptoms: Software rejects the mouthpiece, prompts to reinsert, erratic zero.
Root cause: Worn mouthpiece receptacle contacts or a damaged disposable mouthpiece.
USB cable / strain-relief wear
LowSymptoms: Intermittent dropouts when the cable is moved, connector loose in the socket.
Root cause: Repeated flexing at the connector; strain relief failed.
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.
USB interface cable
Class Periodic replacementRel. cost $R&R Easy
Pre-calibrated disposable mouthpiece
Single-patient consumable; no cleaning or calibration.
Class ConsumableRel. cost $R&R Easy
Mouthpiece receptacle / contact assembly
Class Periodic replacementRel. cost $$R&R Moderate
3-L calibration syringe
Verification tool, not a spare part.
Class Major service partRel. cost $$R&R Easy
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| USB interface cable | Periodic replacement | $ | Easy |
| Pre-calibrated disposable mouthpiece Single-patient consumable; no cleaning or calibration. | Consumable | $ | Easy |
| Mouthpiece receptacle / contact assembly | Periodic replacement | $$ | Moderate |
| 3-L calibration syringe Verification tool, not a spare part. | Major service part | $$ | 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 verification out of range
- Fit a fresh mouthpiece and repeat the 3-L syringe check with smooth, full strokes.
- Inspect the flow path for moisture or debris; let it dry fully.
- Confirm ambient temperature/pressure entry in the software is correct (BTPS).
- Try a second mouthpiece from a different lot to rule out a bad disposable.
- If verification still fails, refer the device to the manufacturer - the sensor is not field-adjustable.
Symptom: Software will not detect the spirometer
- Try a different USB port and a known-good cable; the Orbit draws power over USB.
- Confirm the driver is installed and the device enumerates in the OS.
- Inspect the USB connector on the device for bent pins or looseness.
- Test on a second PC to isolate host vs device.
- Replace the interface cable, then the device if it still will not enumerate.