Ecom CN, Руководство по эксплуатации

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ecom-CN Page 23
Sensors:
The sensors get calibrated with the reference gas fresh air by each
switch-on procedure. The state of the sensors is permanently con-
trolled by the instrument. New sensors age along the operation peri-
od because of the wearing of the reagents (oxygen sensor) and due
to soiling respectively exceeding concentrations (CO sensor).
The output values of the sensors are (menu
"Control" ):
O2 ca. 1500 mV
CO 0 mV (+/- 50)
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 authorised service centre. The oxygen
sensor must show a value >300 mV, otherwise it must be changed
by an authorised service centre.
The CO sensor is protected against overload by the internal pro-
gramme. If the limit value of 4000 ppm is exceeded, a second pump
switches on and flows the sensor with fresh air. The sensor with can
be switched again into the measuring mode by pressing the
<F2>
key.
Power supply:
The battery should be recharged once the instrument instructs to do
so (acoustical warning and message on display). The charging state
can be checked on the display looking at the voltage indication
(menu "
Control "). The battery warning is activated when the value is
lower than 5,6 V.
By 5,4 V no battery operation is possible anymore. The instrument
must be operated via charger.
Probe and hose:
Depending on the frequency of use, probe and hose should be regu-
larly cleaned in order to release particle deposits and to prevent early
wearing due to corrosion.