IMPORTANT:
The SPAN FACTOR is an indication of sensor life. The span factor is accurate only after an accurate
callibration has been completed.
The SPAN FACTOR of a new oxygen sensor is in the range of 400 to 600.
Over time, as the oxygen sensor ages, each calibration should require an adjustment with the UP ARROW
BUTTON to correct for any degradation of the electrochemical sensor output (note: the degradation is
approximately 1% of the reading per month).
When the SPAN FACTOR reaches around 980, it will become necessary to replace the sensor during the
next calibration.
DISPLAYING THE CURRENT SPAN FACTOR
Press the UP ARROW BUTTON.
Up Arrow Button
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