VT650/VT900
Users Manual
36
Oxygen Sensor Replacement
The Analyzer uses a galvanic oxygen sensor
that is under warranty for 12 months. You must
replace the oxygen sensor cell when the oxygen
calibration cannot be successfully completed.
The oxygen sensor can operate for longer than
12 months depending on use. With normal use
the VT650 oxygen sensor will last 12 months
and the VT900 oxygen sensor will last
24 months.
To replace the oxygen sensor:
1. Remove the screws in the oxygen sensor
door on the back of the Analyzer.
The oxygen sensor is a round plastic
cylinder about one inch in diameter with
wires protruding from the back of the sensor.
2. Disconnect the electrical connector on the
sensor wire.
3. Unscrew the old sensor and remove it.
4. Screw in the new sensor. (See Replaceable
Parts).
5. Re-connect the sensor wire.
6. Replace the oxygen sensor door.
7. Re-calibrate the oxygen sensor. (See
Calibrate Oxygen.)
Battery Status
The Battery status indicator on the back of the
Analyzer has these normal states:
• Solid red—Battery is charging
• Solid green—Battery is 100 % charged
The battery has these error states:
• Blinking red—Battery charger error
• Blinking red/green—Battery charger error
(Battery is near full charge.)
For these errors, remove the ac adapter and
reinstall. If the problem reoccurs, replace the
battery pack. If the problem persists, contact
Technical Support.
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