Ecom EN2 Operating Instructions Manual page 51

Prefilter
The prefilter made of high-grade steel is within the condensate con-
tainer. It should be cleaned when contamination (with warm water
and dry). Unscrew condensate container and prefilter. Assemble
after cleaning again in reverse order.
Sensors
The sensors get calibrated with the reference gas fresh air by each
switch-on. Their state is permanently checked by the instrument.
New sensors age along the operation time because of the wearing of
the reagents (oxygen sensor) and due to soiling respectively exceed-
ing concentrations beyond the nominal measurement range (toxic
sensors). The output values of the sensors are (menu "Control"):
O
2
Others
If an error message is displayed during calibration and cannot be
eliminated despite several calibration phases, so the instrument must
be checked by a qualified and authorized service center. The oxygen
sensor must show a value of >7000 mV, otherwise it must be
changed by an authorized service center.
The CO sensor is protected against overload by the internal pro-
gram. If the limit value of 4000 ppm is exceeded, a second pump
switches on and flows the sensor with fresh air.
ecom-EN2
approx. 20000 mV
0 mV (+/- 150)
Prefilter
Page 51