Precision Medical PM5400 Series - Manual (Page 11)

10
H
ELI
O
2
BLENDEr
HELIUM-OxygEn
7. If alarm fails to function properly, DO NOT USE.
REVERSE GAS FLOW PROCEdURE
(
CE Requirements ONLY)
1. Assure bleed flow valve is not engaged. Disconnect the oxygen hose
from the gas source. Remove all outlet connections from the H
ELI
O
2
Blender to ensure that there is no outlet flow.
2. Place the free end of the oxygen supply hose under water. While
gradually increasing the heliox supply pressure from 30-75 psi
(2.07-5.17 bar) check for leakage past the oxygen inlet check valve.
3. Replace the Duckbill Check Valve in the oxygen inlet, if leakage is
>100 ml/min. Reference H
ELI
O
2
Blender Service Manual (P/N 506124 ).
4. Repeat steps 1-3 to check for leakage past the heliox inlet check
valve.
OPERATING INSTRUCTIONS
CAUTION
Inspect the H
ELI
O
2
Blender for visual damage before use,
DO NOT USE if damaged.
1. Secure Blender to wall or pole mount bracket.
2. Connect heliox and oxygen supply lines from H
ELI
O
2
Blender to
heliox cylinder and oxygen supply.
3. Connect oxygen flowmeter to Blender outlet.
4. Adjust the Oxygen Concentration Dial to the prescribed
concentration. The balance of the concentration will be helium
exiting the flowmeter.
NOTE: The Oxygen Concentration Dial does not rotate 360°. dO
NOT force dial beyond the oxygen concentration endpoints
as this will damage the Blender.
5. Confirm the flow of heliox mixture to the patient.
6. Actual heliox concentration to the patient may vary due to
entrainment of room air via the patient interface device.
CAUTION
• Refer to “Oxygen Flowmeter Conversion Chart” for corrected
heliox flows.
• An oxygen flowmeter should be used on the outlets of the H
ELI
O
2
Blender along with the corresponding flow conversion chart.
• Actual flow from an oxygen flowmeter utilized to deliver heliox
are higher than read on the flowmeter.