Welch Allyn Atlas Operator's Manual page 103

RECOMMENDED ACTIONS:
An electrical fault has been detected in the Temperature system. You can continue to use the Atlas
Monitor until it is convenient to perform repairs, if it acceptable to operate without Temperature sensing.
The unit must be repaired.
MESSAGE:
Unexpected forward flow - CO
Unexpected reverse flow - CO
MEANING:
The CO system has detected an unacceptable level of airflow that is overpowering the flow requirements
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of the CO pump system.
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RECOMMENDED ACTIONS:
Check that the CO tubing is connected as a Sidestream sample. Mainstream sampling is not supported on
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Atlas Monitor.
Check that there is no pressure or vacuum source connected to the CO
Check that there is no pressure or vacuum source connected to the CO
Atlas Monitor.
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tubing.
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exhaust outlet on the rear of the
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