Bedienungsanleitung Senseair aSENSE M III (Seite 11 von 14) (Englisch)

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15. Push MENU(+) to reach the setting of the MAX value. The display shows Set H.

16. Push ENTR(+-) to set the MAX value of the output. The display shows the numerical value in

% e.g. the standard setting 100.0 % or previously set value. Push MENU(+) to increase the

MAX value. Push ESC(-) to decrease the MAX value. Push ENTR(+-). The display shows

Sure. Push ENTR(+-) to save the setting and return to Set H. Push MENU(+) or ESC(-) to

return to Set H without saving the new setting. Push ESC(-) to return to the output to be set,

item 12. Push ESC(-) once again to return to the setting of analogue outputs item 11.

17. Push MENU(+) to reach the calibration with fresh air. The sensor needs fresh air, air with 400

ppm carbon dioxide. The display shows CALb. Push ENTR(+-). The display shows Sure. Push

ENTR(+-) to confirm that a background calibration should be done. After completed

background calibration the sensor returns to DEFAULT. If a background calibration should not

be executed push MENU(+) or ESC(-). The background calibration has a time limit.

18. Push MENU(+) to reach the zero point calibration. The sensor needs carbon dioxide free air or

gas. . The display shows CAL. Push ENTR(+-). The display shows Sure. Push ENTR(+-) to

confirm that a zero point calibration should be done. After completed zero point calibration the

sensor returns to DEFAULT. If a zero point calibration should not be executed push MENU(+)

or ESC(-). The zero point calibration has a time limit.

FUNCTIONAL TEST of CO

/ CO sensor aSENSE mIII

Functional test

The unit has three LED’s – green, yellow and red. These LED’s indicate the status of the controller. An

internal delay function prevents the alarm functions of the relay and OUT4 output during two minutes

after power up. The alarm outputs may be tested after the two minutes delay

Green LED - ”No alarm situation” is lit, when the relay is contact closed.

Yellow LED - ”Call for maintenance” is lit, if an error flag is set or the measurement is out of range.

This information is also shown on the display by the wrench icon. Any push button press, or executed

maintenance function, is acknowledged by emission from this LED. If an error has been detected both

the yellow and red LEDs are lit.

Red LED - ”Alarm high gas concentrations” is lit, when the open collector output is activated (contact

closed). The CO concentration is 35 ppm or more OR the CO

concentration is 1500 ppm or more OR

if the yellow LED is lit.

A simple and visual functional test can easily be performed. Take a breath and blow the air from a

distance of a few centimetres on the sensor. The sensor will detect a rapid increase in the carbon

dioxide concentration. The red LED is lit and the green LED is turned off when the CO or CO

concentration goes above the pre-set value. If the sensor is connected to a controller, the flow of the

ventilation system will eventually increase by change of the fan speed or opening of a damper actuator

(depending on the installation/application).

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