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ESO 2 ICU Ventilator 33 User Manual
Pre-operation Procedures: Oxygen Monitor
Check the monitor at the secondary point
10. If the oxygen monitor is not displayed, select O2 MONITOR ‘on’ in the
O2 MONITOR AND SPIROMETRY submenu.
11. Detach the sensor (1) and gently move it through the air, to allow
room air to circulate, for 20 seconds.
12. Allow the oxygen sensor to stabilise for 15 minutes (check that the
reading (2) remains constant for a 30 seconds period).
13. Press the menu button (3). Select the O2 monitor sub-menu.
14. Scroll to CALIBRATION
Press the navigator wheel (4) to switch to 21% if the menu shows
100%.
15. A message will flash on the screen: O2 AT 21% ?
Press the button to confirm.
Note that the message: ERROR: CAL OUT OF RANGE will appear on
screen if the user attempts to calibrate at 21% in 100% oxygen
16. A message ‘Calibrated at 21% oxygen’ should be displayed.
17. Exit the menu system by pushing the menu button (3).
18. Refit the sensor. Check by setting 100% oxygen and maintain the flow
through the circuit for approximately 20 seconds.
Allow the oxygen sensor to stabilise (30 seconds minimum).
The measured O2 (2) must show 100% (±1%).
4.3.2 Sensor Low Indication
The unit automatically detects when sensor life is low. Replace the sensor
when the message: OXYGEN SENSOR LOW OUTPUT appears on screen.
Sensor output will fall very quickly to zero over a period of two to three
weeks from the first time that the alarm is activated.
Sensor replacement - see section 6.4.
4.3.3 Setting the O2 Alarms
Set High Alarm
The high alarm value (1) cannot be set below 19% or above 105% (note
that in certain conditions of excess pressure, the readout may show a
value above 100%).
1. Touch the O2 concentration display, or press the menu switch (2) to
select the O2 monitor sub-menu.
2. Scroll to HIGH ALARM SET and press the navigator wheel.
3. Rotate the wheel (3) to change the displayed alarm figure to the
desired value, then press the wheel to confirm.
4. Scroll to ESCAPE FROM MENUS. Press the wheel to exit.
Set Low Alarm
The alarm value cannot be set below 18%, or above 99%.
1. Touch the O2 concentration display, or press the menu switch (2) to
select the O2 monitor sub-menu.
2. Scroll to LOW ALARM SET and press the navigator wheel.
3. Rotate the wheel (3) to change the displayed alarm figure to the
desired value, then press the wheel to confirm.
4. Scroll to ESCAPE FROM MENUS, press the wheel to exit.
20
100
%O2
21
1
2
3
1
O2 Monitor & Spiro
ESCAPE FROM MENU O2 MONITOR: on
>
CALIBRATION: 21%
HIGH ALARM SET: 105
LOW ALARM SET: 18
SPIROMETER: on
SPIRO CALIBRATION: 0 L/min
%O2
XX
20
100
4
3
2