Acoustic Signal - Helios CO2 AP-A Installation And Operating Instructions Manual

Installation and operating instructions
CO2 Monitor CO
2
Type Measuring
ranges CO
CO2 Monitor
C O2 A P 0...3000 ppm
C O2 A P-A 0...3000 ppm
C O2 U P 0...3000 ppm
Note: This unit must not be used as safety-relevant device!
ATTENTION !
The minimum CO concentration of outside air in leafy, hardly industrialised areas is approx. 350 ppm. The gas inter-exchange in the
2
sensor element happens by diffusion. Depending on the changes to the concentration and the flow velocity of the air surrounding the
sensor, the reaction of the device to the change of concentration may take place with a delay. It is essential to choose an installation
location for the device in which the air stream flows around the sensor. Otherwise the gas exchange may be considerably delayed
or prevented.
Commissioning
After the device ist switched on, a self-test and temperature equalisation are performed. Depending on the ambient condi-
tions, this process takes 30-50 minutes (as an option, manual calibration can now be performed). If commissioning with
automatic calibration, proceed as follows:
1. Open all windows or set the air conditioning system to use outdoor air.
2. Switch on the device and move away from the device. If possible, all persons should leave the room.
3. The device is ready to use after 50 minutes.
Automatic calibration of the CO
The regular exchange of fresh air is all that is required for the self-calibration technology in the sensor (CO
350 - 500 ppm). The device detects this condition and performs the calibration automatically. It is sufficient to open the win-
dows or set the air conditioning system to use outdoor air at regular intervals and to stop all CO
influence the ambient air. Proceed as follows:
Open all windows fully or set the air conditioning system to use outdoor air 1x weekly for 15-20 minutes.
If possible, all persons should leave the room during this time.
Regular ventilation of the rooms and flushing of the duct with fresh air will increase the measuring accuracy of the sensor.
Manual calibration of CO measurement
2
Before starting, you must ventilate the room intensively to bring it up to fresh air level (≤ 500 ppm)! Manual calibration can be carried out
independently of automatic calibration. Sufficient fresh air must be provided before and during the calibration procedure (CO
concentration: 350-500 ppm). also make sure that no CO
to perform manual calibration:
1. Preparation: Remove the housing cover (see illustration on page 2) and open all windows or set the air conditioning system
to use outdoor air. Wait 15 minutes (ventilation). All persons should leave the room during this time.
2. Press and hold the "ZERO" button until the flashing LED row changes to a steady light after 5 seconds.
3. Now leave the room again.
4. After another 2 minutes, the calibration is complete, and the LED display should indicate a CO
350- 500 ppm (level 1: LED 1, green).

Acoustic signal

When the range changes, a signal tone is emitted to provide feedback that the next warning level has been reached, without
having to ook directly at the traffic light. The acoustic signal can be switched on via DIO switch (Position ON = signal tone
on).
CO2 Monitor
sensor for schools with traffic light indicator and acoustic signal incl. power supply unit
Display
CO
2 2
5 LEDs,
signal tone
5 LEDs,
signal tone
5 LEDs,
signal tone
measurement
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Equipment
Plug-in power supply unit (connecting cable
approx. 1.5 m)
Micro-USB power supply unit (connecting
cable approx. 1.5 m) , stand holder
In-wall power supply unit
-producing processes influence the ambient air. Proceed as follows
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8
Item no.
with traffic light
4 01 07
4 01 09
4 01 08
concentrations:
2
-producing processes that
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concentration of between
2
2