Ecom B, Руководство по эксплуатации

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ecom-B Page 11
CO-switch-off without purging pump
The internal program protects the CO-sensor for overload. In case
the limit of 2000 ppm (CO sensor without H
2
) is exceeded the gas
pump will be switched off. Remove the probe off the combustion gas.
Then press the key
<CAL>
. The gas pump turns on and purges the
instrument with fresh air. After sufficient purge time the unit switches
back to measuring mode (put the probe in the combustion gas).
CO-switch-off with purging pump (option)
The internal program protects the CO-sensor for overload. In case
the limit of 4000 ppm (CO sensor with H
2
) is exceeded a second
pump switches on and purges the sensor with fresh air. After suffi-
cient purging time (blinking: "CO"), the sensor can be brought back
to the measurement mode with
<Enter> / <CO MV ON/OFF> / <En-
ter>
(the sensor can also manually be switched off by pressing
<En-
ter> / <CO MV ON/OFF> / <Enter>
).
4.3. Draft Measurement
The gas measurement mode already provides a trend indication of
the draught conditions in the combustion gas channel. As the pres-
sure sensor is very sensitive and tend to drift, the value will not be
recorded by pressing
<store>
. It is therefore recommended to recal-
ibrate this sensor prior to the actual measurement and results print-
ing.
The current value will be displayed as well
as the remark to reset the zero point of the
sensor. Therefore disconnect the draught
hose from the instrument and press the key
<CAL>
. By this the sensor is calibrated.
Connect the draught hose again with the
instrument. The exact measurement value
is displayed now and can be stored by
pressing
<store>
and added to the other
values already in the temporary memory.
The stored value will appear on the display.
Draught
Draft
-0.12 hPa
Val.: - . - - hPa
Set zero point
CAL.
Draught
Draft
-0.12 hPa
Val.:
-0.12
hPa
Set zero point
CAL.