- Breathing Valve
- SW upgrade and activation code

The LV  test foresees that patient breathes pure oxygen for almost the entire duration of the test. User is therefore required to procure a gas cylinder filled with pure O2. An additional cylinder with known O2 and CO2 gas concentration is required for the analyzer calibration.
COSMED recommends the use of cylinders with the following gas composition:

1) FRC test cylinder (O2 99%)
2) Calibration cylinder (5% CO2 - 16% O2 - N2  balance)