AirSep MN152-1 - Manual (Page 9)

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4.) Connect the other end of the oxygen hosing to either inlet of the SureFlow
unit (See Figure 2.).
Figure 2 Figure 3
5.) As necessary, test for leaks at both ends of the hose by applying soapy
water to each of the connection points. If bubbling occurs, then leaks are
present, and the connection must be tightened properly until leaks are
eliminated.
It may be more apparent if there is a leak(s) by allowing the concentrator
to run with all flowmeters turned off at the flow station. If no leak is
present, the flowmeter on the concentrator should read zero.
Another aid in determining the source of a leak(s) is to put your thumb
over each outlet at the SureFlow station, one at a time. The flowmeter ball
must drop to zero on each test, indicating no leak within the SureFlow
station.
6.) Attach up to five (5) cannulas at the oxygen outlets of the flow station,
depending on how many patients will be receiving oxygen therapy.
Cannula length for each outlet can be a maximum of 50 feet (15 meters).