Changing The Oxygen Sensor; Maxo +A Model - Maxtec MAXO2+ A Operating Manual & Instructions For Use

The device will automatically perform a calibration and begin displaying % of oxygen.
HELPFUL HINT: If unit does not function, verify that the screws are tight to allow
proper electrical connection.
HELPFUL HINT (MAXO + AE): Before closing the two case halves together, verify that
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the keyed slot on top of the coiled cable assembly is engaged on the small tab located
on the back case.
This is designed to position the assembly in the correct orientation and prevent
it from rotating. Improper positioning could hinder the case halves from closing
and prevent operation when tightening the screws.

6.0 CHANGING THE OXYGEN SENSOR

6.1 MAXO +A Model
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Should the oxygen sensor require changing, the device will indicate this by
presenting "Cal Err lo" on the display after initiating a calibration.
To change the oxygen sensor, begin by removing the three screws from the
back of the device.
A #1 phillips screwdriver is required to remove these screws.
Once the screws are removed, gently separate the two halves of the device.
Disconnect the oxygen sensor from the
printed circuit board by pressing the
LOCK LEVER
un-lock lever first and then pulling the
connector out of the receptacle. The
oxygen sensor can now be replaced
from the back half of the case.
HELPFUL HINT: Be sure to orient the new
sensor by aligning the red arrow on the
sensor with the arrow in the back case.
A small tab is located on the back case that is
designed to engage the sensor and prevent it
FIGURE 4
from rotating within the case. (FIGURE 4)
NOTE: If the oxygen sensor is installed incorrectly, the case will not come back together
and the unit may be damaged when the screws are reinstalled.
NOTE: If the new sensor has red tape over the outside, remove it, then wait 30 minutes
before calibrating.
Reconnect the oxygen sensor to the connector on the printed circuit board.
Carefully bring the two halves of the case together while positioning the wires
to ensure they are not pinched between the two case halves.
Make sure the sensor is fully inserted and in the proper orientation.
Reinsert the three screws and tighten until the screws are snug. Verify the unit
operates properly. The device will automatically perform a calibration and begin
displaying % of oxygen.
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