Calibration Errors And Error Codes; Changing The Batteries - Maxtec MaxN2+ Instructions For Use Manual

4.0 CALIBRATION ERRORS AND
ERROR CODES
The MaxN2+ analyzers 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.
E02: No sensor attached
Open the hand held MaxN2+ analyzer and disconnect and reconnect sensor. Unit
•
should perform an auto calibration and should read 79.1%. If not, contact Customer
Service for possible sensor replacement.
E03: No valid calibration data available
Make sure unit has reached thermal equilibrium. Press and hold the Calibration Button
•
for three seconds to manually force a new calibration.
E04: Battery below minimum operating voltage
Replace batteries.
•
CAL ERR ST: O2 Sensor reading not stable
Wait for displayed oxygen reading to stabilize, when calibrating the device at 100%
•
oxygen.
Wait for unit to reach thermal equilibrium, (Please note that this can take up to one
•
half hour, if the device is stored in temperatures outside the specified operating
temperature range).
CAL ERR LO: Sensor voltage too low
Press and hold the Calibration Button for three seconds to manually force a new
•
calibration. If unit repeats this error more than three times, contact Maxtec Customer
Service for possible sensor replacement.
CAL ERR HI: Sensor voltage too high
Press and hold the Calibration Button for three seconds to manually force a new
•
calibration. If unit repeats this error more than three times, contact Maxtec Customer
Service for possible sensor replacement.
CAL ERR BAT: Battery voltage too low to recalibrate
Replace batteries.
•
5.0 CHANGING THE BATTERIES
Batteries should be changed by service personnel.
Use only brand name batteries.
•
Replace with two AA batteries and insert per orientation marked on the device.
•
Should the batteries require changing, the device will indicate this in one of two ways:
The battery icon on the bottom of the display will begin to flash. This icon will continue
•
to flash until the batteries are changed. The unit will continue to function normally for
approx. 200 hours.
If the device detects a very low battery level, an error code of "E04" will be present on
•
the display, and the unit will
not function until the batteries
are changed.
To change the batteries, begin by
removing the three screws from the
back of the device. A #1 Phillips screw-
driver is required to remove these
screws.
Once the screws are removed, gently
separate the two halves of the device.
The batteries can now be replaced
from the back half of the case. Be sure
to orient the new batteries as indi-
cated in the embossed polarity on the
back case.
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FIGURE 3
NOTE: If the batteries are installed incorrectly the batteries will not make contact and the
device will not operate.
Carefully, bring the two halves of the case together while positioning the wires so they are not
pinched between the two case halves. The gasket separating the halves will be captured on
the back case half. Reinsert the three screws and tighten until the screws are snug. (FIGURE 3)
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 electri-
cal connection.
6.0 CHANGING THE OXYGEN SENSOR
6.1 MaxN2+ A (R217P67)
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 unlock 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 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 prop-
erly. The device will automatically perform a calibration and begin displaying % of oxygen.
6.2 MaxN2+ AE (R217P66)
Should the oxygen sensor require changing, the device will indicate this by presenting "Cal
Err lo" on the display.
Unthread the sensor from the cable by rotating the thumbscrew connector counterclockwise
and pull the sensor from the connection.
5
LOCK LEVER
FIGURE 4