Ecom -D Quick Manual page 9

The CO sensor is protected against over-saturation thanks to an in-
ternal program. If the 4000 ppm limit is exceeded, a purging pump is
activated which provides the sensor with fresh air. After sufficient
purging time (X behinds CO disappears), the sensor can be reinte-
grated into the measurement system with <F3>. You can do this au-
tomatically by selecting <Yes> in <Adjustments> / <Internal> / <CO-
Automatic>. The sensor can also be manually excluded from the
measurement system by pressing <F3>.
ecom-D Page 9