Vyaire MicroCO Manual De Funcionamiento página 26

If the above message is repeated, the CO meter must be returned to
Vyaire, or an authorised agent, for sensor replacement. Sensor life is
greater than 2 years. The sensor life depends upon both the amount
of exposure to CO and other gases, particularly solvents such as
alcohol and cleaning fluids.
If the signal from the CO sensor is too high, a new calibration value
will not be stored and the following will displayed when calibration is
attempted:
The most likely cause for this is using an incorrect concentration of
calibration gas. Ensure that the concentration of calibration gas is
correct (20ppm) that the connections to the gas cylinder are secure,
and then repeat the calibration procedure.
In order to stop any gas leak from the can after calibration, ensure
that the control knob is tightened firmly.
Important Notes:
Only certified calibration gas from a reputable source should

be used.
Ensure that no CO is present on the sensor for 3 minutes

before starting the calibration procedure.
Ensure that the instrument and gas cylinder have stabilised at

room temperature before calibrating.
In order to stop any gas leak from the can after calibration,

ensure that the control knob is tightened firmly.
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