AERASGARD RLQ-SD Інструкція з експлуатації, монтаж та встановлення - Сторінка 7

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Installation and Commissioning

ATTENTION !

The gas inter-exchange in the 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.

General information on air quality

There is no universally uniform standard, which could be applied to a VOC

sensor (Volatile Organic Compounds). The monitored air contains a large

number of substances to which the sensor responds, and gas mixtures are

adjusted. Therefore this sensor does not act selectively, but rather reflects

the overall air quality. In principle, one also cannot state precisely what is

"bad air" or what is "good air" because this is a purely subjective sensation.

Commissioning

After the device is switched on, a self-test and temperature equalisation are

performed. Depending on the ambient conditions, this process takes 30-50

minutes (as an option, manual calibration can now be performed). If commis-

sioning 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 VOC measurement (permanently active)

The regular exchange of fresh air is all that is required for the self-calibration

technology in the sensor. The device detects this condition and performs the

calibration automatically. It is sufficient to open the windows or set the air

conditioning system to use outdoor air at regular intervals. Make sure that no

harmful substances influence the ambient air during this process. Proceed as

follows:

Open all windows fully or set the air conditioning system to use outdoor air

1x weekly for 15-20 minutes. During this time, the release of gases from

volatile organic substances must be prevented as far as possible.

Regular ventilation of the rooms and flushing of the duct with fresh air will

increase the measuring accuracy of the sensor.

Every time the device is switched on, the automatic calibration cycle restarts

and calculates a correction value across the operating period. In case of power

disruptions of less than 7 days, the calculation algorithm may be

supported with a manual calibration to adjust the correction value more quickly.

Manual calibration of the VOC measurement

Manual calibration can be carried out independently of automatic calibration.

Sufficient fresh air must be provided before and during the calibration proce-

dure. Also make sure that no harmful substances influence the ambient air.

Proceed as follows to perform manual calibration:

1. Preparation: Prevent the release of gases from volatile organic

substances as far as possible, open windows and set air conditioning

system to use outdoor air, remove the housing cover and wait 15 min.

2. Press and hold the "ZERO VOC" button until the flashing LED row

changes to a steady light after 5 seconds. Devices with a display indicate

"AUTO 0" and change the countdown from 5 to 60. The calibration

process has started. Keep the windows open or

the air conditioning system set to use outdoor air.

3. After 60 seconds, the calibration is complete (status LED has gone out,

the countdown is complete) and the device indicates or transmits the

current VOC concentration.

Switching point setting

A switching point between 10 % and 95 % of the measuring range can be

selected using the SET potentiometer. A potential-free changeover contact is

available as a switch output.

Offset

The VOC measured value can be adjusted subsequently using the offset

potentiometer. The adjusting range is ± 10 % of the measuring range.

DIP switches

VOC sensitivity

LOW

MEDIUM (default)

HIGH

IAQ (Indoor Air Quality)

DIP switches

VOC sensitivity

LOW

MEDIUM (default)

HIGH

IAQ (Indoor Air Quality)

Output

Voltage 0 -10 V (default)

Current 4...20 mA

Traffic light (5x LEDs)

deactivated

activated

Note: DIP 3 is not assigned!

Level IAQ (Indoor Air Quality)

excellent

no action required

good

prompt airing recommended

moderate

airing recommended

poor

increased airing required

unhealthy

intense airing necessary

Table according to TVOC guidelines of the German Federal

Environmental Agency to assess indoor air contamination

(Bundesgesundheitsbl - Gesundheitsforsch -

Gesundheitsschutz 2007, 50: 990–1005)

Traffic light indicator

VOC -

LED 1

LED 2

green

content

0 %

25 %

5 %

50 %

10 %

75 %

15 %

100 %

20 %

25 %

50 %

30 %

75 %

35 %

100 %

40 %

45 %

50 %

55 %

60 %

65 %

70 %

75 %

80 %

85 %

90 %

95 %

100 %

Once the aforementioned values have been reached, the respective

LED becomes active (with increasing luminosity of 25 %, 50 %, 75 %

and 100 %); LEDs that are already active continue to be illuminated.

Rev. 2022 - V37

RLQ - SD

DIP 1

DIP 2

OFF

O N

OFF

O N

RLQ - W

DIP 1

DIP 2

OFF

O N

OFF

O N

DIP 4

OFF

O N

DIP 5

OFF

O N

VOC

0...19 %

20...39 %

40...59 %

60...79 %

80...100 %

RLQ - W - A

LED 3

LED 4

LED 5

yellow

–

25 %

–

50 %

–

75 %

–

100 %

–

25 %

50 %

75 %

100 %

25 %

50 %

75 %

100 %

red

–