I am wearing the pulse oximeter, but the reading of SpO2 does not decrease, even after 1 or 2 minutes of breathing through AltiPower. What is wrong?
Most likely your AltiPower is assembled incorrectly and you are simply breathing ambient air. Check whether the breathing bag is installed correctly and all other parts are in place. Refer to Getting Started and Assembly sections of the user manual / guide. Check that the pulse oximeter is functioning correctly.