Operation Check And Test Of Oxygen Concentration; Description Of Operation; Operation Check - AirSep Focus Service Manual

2.0

Operation Check and Test of Oxygen Concentration

2.1 Description of Operation

Air enters the Focus Oxygen Concentrator through an external air intake.
This air enters the compressor via a suction resonator that quiets the compressor's suction sound.
The pressurized air then exits the compressor to a two-way solenoid feed valve that directs the air into
one of two sieve beds that contain molecular sieve. The unique property of molecular sieve enables it to
physically attract (adsorb) nitrogen when air passes through this material, thereby separating the
nitrogen from the oxygen in ambient air.
There are two sieve beds: While one produces high-concentration oxygen, the other is purged of the
nitrogen it adsorbed (collected) while it made oxygen. Oxygen exits the product tank after first passing
through the integrated product filter.
In addition to the molecular sieve beds that allow oxygen to be separated from air, Focus contains an
Oxygen Conserving Device (OCD) valve that controls delivery of high-concentration oxygen to the
patient at the point in the breathing cycle when the patient starts to inhale.
Focus delivers a gas consisting of 90% (+5.5%/-3%) oxygen at a pulse flow rate equivalent to 2 LPM
(liters per minute) constant flow.
2.2

Operation Check

AirSep tests every Focus Oxygen Concentrator thoroughly after manufacture. You must perform the
following test to ensure that no damage occurred in shipping or handling.
1. Open and inspect all cartons upon delivery. Unpack the unit and remove
it from the carton. Inspect the unit itself for damage.
If the exterior of a unit's carton is damaged, or if the unit itself is damaged,
note this on the freight bill signed by the driver.
2. Connect the power supply or battery to the unit. Turn the Focus unit on by pressing the
power switch to the on position (l). Refer to Section 3 for operating instructions.
3. Check to see that the following sequence occurs:
a. When Focus is turned on, [A one-second, audible alarm sounds to indicate start-up. The
green and red LED's on the control panel will alternate on/off for (10) seconds. After the
(10) second start up is complete the green LED will be illuminated indicating that the
Focus is ready to be used.]
b. The compressor runs.
c. Exhaust air flows from the unit.
4. Perform an oxygen concentration test, as described in Section 5.
MN171-1 Rev. B