The detector then reactivates and performs the calibration countdown. Continue to
hold until the countdown is complete.
Note: If is not held for the entire countdown, the detector will deactivate.
Auto Zero Sensor
Note: Do not apply calibration gas until Apply Gas displays, otherwise the auto zero function will
fail.
flashes while the detector automatically zeroes the combustible and toxic sensors,
and calibrates the oxygen sensor. When auto zero is complete, the detector beeps two
times.
Auto Zero Successful: If the sensor(s) successfully zeroes, the detector automatically
proceeds to the See "Auto Span" on the facing page for more information. function.
Auto Zero Unsuccessful: If a sensor(s) fails auto zero, an error message and which sensor(s)
failed displays.
To determine the cause and solutions for the failed sensor(s), refer to See
"Troubleshooting" on page98 for more information..
BW MaxXT II 75 User Manual
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