CAIRE HELiOS Marathon H850 Use Manual page 33

Figure 15. Alternate Cannula Placement (Behind Neck)
4. Monitoring the oxygen contents indicator—
Caution
When checking contents, remove any carry accessories
and ensure your nasal cannula is not pulling on the
portable oxygen unit.
HELiOS Marathon
Using Your HELiOS Marathon H850 Portable Oxygen Unit
The contents indicator registers approximately
how much liquid oxygen remains in the
portable oxygen unit. To ensure you have
enough oxygen to meet your needs, check the
indicator periodically.
Figure 16. Locating Contents Indicator
TM
H850 Portable Oxygen Unit Home Use Guide 29