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9
ENGLISH
3.4 Backlight Operation
To turn on the backlighting:
1. When the unit is on, pressing the Backlight
key will turn the backlighting on for
30 seconds. Additional presses will turn off the backlighting.
2. If the device is being used in a dark location, press any key to activate the back light.
CAUTION:
Excessive use of the backlight can reduce the life of the batteries.
3.5 Sleep Mode Operation
To use the sleep mode function:
1. Remove the batteries from the unit.
2. Locate the sleep mode switch in the battery compartment and set to the ON position.
3. Replace the batteries in the unit.
The unit will now perform a normal boot-up operation with sleep mode enabled. With sleep
mode enabled the unit will function with all the same parameters as outlined above with one
new feature. While in the ON mode, the unit will time-out after 90 seconds to a battery saving
condition. This condition will be indicated by a crescent moon on the display. While in this
condition any key that is pressed will return the unit to the ON mode and reset the 90 second
time-out counter. In sleep mode, the device will continue to monitor the oxygen level and will
activate the alarm if an alarm condition occurs.
3.6 External Power Supply Operation
To extend the life of the batteries a Maxtec approved external power supply can be purchased.
Once connected to the unit, total power is supplied by the external power supply. The batter-
ies are still required to be in the unit and will provide emergency power in the event main AC
power is lost.
NOTE:
Use only the Maxtec approved external power supply in Section 9.0 Spare Parts and
Accessories.
NOTE:
The power supply is not a battery charger.
DO NOT
use rechargeable batteries.
WARNING:
Do not position the equipment in a way that it would be difficult to unplug the
power supply. Unplugging the power supply is the only means of disconnecting or isolating
the equipment from AC mains power.
4.0 SENSOR REMOVAL AND
REPLACEMENT
The MaxO2 ME is shipped with a new Max 550E oxygen sensor.
Although the sensor has a very long expected life, eventually the sensor will require replace-
ment. Removing or installing a sensor, when necessary, is a very simple procedure.
To remove and install a new sensor:
1. Grasp the sensor in one hand and, with the other hand, unscrew the cable connector
counter-clockwise at the sensor.
2. Pull out the cable connector plug from the expired sensor.
3. Unscrew the flow diverter from the sensor and discard the expired sensor or return it
to Maxtec for proper disposal.
NOTE:
The sensor contains lead and lead acetate, be sure to dispose of expired sensors in
accordance with hospital, local, state and federal regulations.
4. Remove the new sensor from the packaging and remove the protective film from the
sensor face.
5. Insert the cable connector plug into the receptacle of the new sensor and tighten the
cable connector.
6. Screw the flow diverter onto the new sensor.
7. Wait approximately 20 minutes for the sensor to reach equilibrium.
8. Calibrate the new sensor.
NOTE:
If the monitor is on when the sensor is detached and replaced, the monitor will auto-
matically force a re-calibration. The display will read “CAL”.
NOTE:
If the cable locking nut is not fully fastened onto the sensor, then the sensor may not
function properly.
5.0 PROBLEM SOLVING
The MaxO2 ME monitors have a self test feature built into the software to detect faulty calibra-
tions, oxygen sensor failures, and low operating voltage. These are listed below, and include
possible actions to take, if an error code occurs.
NOTE:
The operator must be facing the device and positioned within 4 meters to distinguish
the visual alarm indicators. Audible alarms can be distinguished as long as the operator is in
the same room and the ambient noise level is typical for a clinical setting.
LOW BATTERY ICON
:
If the low battery icon is displayed on the LCD readout at any time,
the batteries should be replaced as quickly as possible.
E01:
Calibration error, sensor output lower than expected. See note below.
E02:
No sensor attached. Reconnect sensor, see note below.
E03:
No Valid Calibration Data Available, make sure unit has reached thermal equilibrium and
perform a calibration routine.
E04:
Battery Below Minimum Operating Voltage, replace batteries. A medium priority alarm will
sound every 25 seconds until the batteries are replaced or become too dead to sound the alarm.
E05:
Calibration error, sensor output higher than expected. See note below.
E06:
Non-compatible oxygen sensor. Reconnect sensor, see note below.
E07:
Calibration error, sensor output is not stable. See note below.
E08:
Calibration error, battery too low to preform calibration. Replace batteries and
re-calibrate.
NOTE:
If you receive a E01, E05, or an E07 error code, correct by ensuring the calibration gas is
either room air or 100% oxygen. Also ensure the calibration gas flow, pressure and concentra-
tion is constant. Allow sufficient time for the sensor to stabilize in the calibration gas and with
room temperature, then attempt to calibrate again.
If these steps do not correct the error, contact Maxtec for technical support.
NOTE:
Use only a Maxtec approved Max-550E sensor called out in Section 9.0 Spare Parts and
Accessories. The Max 550E sensor is equipped with an authentication chip to ensure the moni-
tor is used with an approved sensor.
NOTE:
Correcting E02 or E06 errors:
1. Disconnect the sensor and reconnect, making sure the male plug is fully inserted into
the receptacle before tightening the threaded locking shroud. The analyzer should now
perform a new calibration with the error cleared.
2. If the error still persists, remove the batteries and external power, wait 30 seconds,
then reinstall to perform a factory reset and diagnostic on the analyzer. The analyzer
should again perform a new calibration with the error cleared.
3. Contact Maxtec Customer Service Department if the error code cannot be cleared.
