PROTRONIX NL-ECO-CO2-BA Air Quality Sensors User Manual

PROTRONIX NL-ECO-CO2-BA Air Quality Sensors

Important Information

Room sensor NL-ECO-CO2-BA serves for continuous air quality monitoring inside buildings and for effective ventilation (HVAC) systems control according to actual level of air pollution. Sensor continuously monitors carbon dioxide (CO2) concentration in the air. It can be effectively used in offices, schools, classrooms, shopping centers, homes, restaurants, fitness centers, commercial buildings, etc.

• measures CO2, optical principle NDIR
• LED indication with automatic turn off according to ambient light (at night)
• sound signalization – alarm
• BOOST regime
• analog voltage output 0-10V
• output relay NO/C
• maintenance or calibration not required during operation
• long-term stability
• expected lifetime >10 years

Description

The measuring of CO2 is based on the principle of infrared radiation attenuation dependence on the CO2 concentration in the air (NDIR). Built-in auto calibration function ensures very good long term stability. The sensor has one analog output for the actual concentration of CO2.

CO2 concentration has very good telling ability about actual indoor air quality, therefore the sensor serves to effectively control ventilation and heat recovery units. The trigger level of CO2 concentration output relay can be set by a rotary element in the entire measuring range. Relay switching can be indicated by a short (1,5s) sound signal 1x per minute, if the function is allowed.

BOOST regime allows you to manually set the ventilation to maximum power. Detailed description of functions can be found further in this manual. Current air quality can be easily checked by three LED indicators. When ambient light is dimmed, the indicators turn off automatically to not disturb you  when falling asleep.

Explanation of abbreviations and technical terms can be found on our website in the Glossary section.

Technical data

V AC
Consumption| max 1,5| W

1. CO2 measuring range

| 400  – 1000
400 – 2000
400 – 5000| ppm
2) CO2 accuracy

• for ranges 400 – 1000 and 400 – 2000 ppm
• for range 400 – 5000 ppm

| ± 40 ppm + ±4 %  of reading

± 60 ppm + ±4 %  of reading

CO2 relay – hysteresis| 5 % from range (100ppm/250ppm)
CO2 rate rise| max 1| min
CO2 step response| (90 %) 80| s
Voltage output 3)| 0–10| V DC
Max. switching voltage| 250/30| V AC / V DC
Max. switching current| 5/5| A AC / A DC
Working humidity non condensing| 0–95 %| RH
Working temperature| 0 to +50| °C
Storage temperature| -20 to +60| °C
Expected lifetime| 10| years
Ingress protection| IP20|
Dimensions| 90x80x31| mm

1. Measuring range can be chosen by jumper setting.
2. At 15 – 35 °C, 0-80% RH.
3. Minimum achievable output value corresponds to minimum value of the measuring range.

Voltage output versus CO2 concentration for range 400 – 1000 ppm:

Voltage output versus CO2 concentration for range 400 – 2000 ppm:

Voltage output versus CO2 concentration for range 400 – 5000 ppm:

CO2 sensor autocalibration function

Autocalibration compensates for long-term aging of the key components of the sensor. This function is available only during permanent sensor power supply. Calibration during operation throughout the lifetime of the sensor is not needed.

LED indication description

White LED lights:

Less than 600 ppm CO2.

|

• excellent air quality, low concentrations of CO2
• maintaining this level is not cost-effective

---|---

Green LED lights:

More than or equal to 600 ppm CO2, less than or equal to 1200 ppm CO2.

|

• optimal balance of air quality and energy consumption for ventilation and air condition
• maintaining the CO2 concentration in this range does not significantly reduce the comfort of the indoor environment

---|---

Yellow LED lights:

More than 1200 ppm CO2.

|

• higher concentration of CO2 – lower air quality, that can cause feeling uncomfortable, restlessness, weakness , fatigue, headache, dizziness etc.

---|---

Sensor start after power on

All three LEDs are shining simultaneously in the meantime, pending the availability of the first measured value. But no longer than 10 seconds. The sensor is fully operational after 1 minute since power on.
The declared accuracy is reached after 4 days of continuous power supply.

Sensor failure indication

All three LED´s lights up at the same time permanently.

BOOST regime and alarm setting touch button

BOOST regime

This regime serves to set the sensor controlled ventilation to maximum power regardless of the actual concentration. In this regime the relay contacts are closed and output is set to maximum 10V DC.

BOOST regime is activated by a short touch of the button with fan symbol. The siren beeps briefly to confirm that the button has been touched. Active BOOST regime is indicated by yellow LED blinking – therefore the actual concentration is not indicated.

The regime is deactivated by repeating the procedure the same way. If the BOOST regime is not deactivated by user, it will be deactivated automatically after 20 minutes.

Sound signalization – alarm

Main function of sound signalization is to indicate that the set CO2 level is exceeded, i.e. relay contacts are closed. Alarm function is activated and deactivated by the touch button.

For activation/deactivation of sound signalization hold your finger on the touch button with fan symbol on it.

At first siren beeps 1x shortly, then after 5s it beeps once per 1s for 5s. If it stops beeping after this action, alarm was just deactivated. If it will beep continuously, alarm was just activated. Now the button can be released.

From factory the alarm is set as active.

If the automatic mode of LED signalization is selected, alarm will be active only when the LED signalization is active – i.e. during daytime. At night, when the ambient lighting decreases and the signalization is turned off as such, alarm is also deactivated. If the LED indication is set to “always”, LED signalization and alarm will be active constantly, even in the dark. In both cases the condition is activation of alarm by the touch button.

Electronic board controls and terminals

Terminals

POWER

1. ~ +| supply AC or DC (+) plus pole
2. ~ GND| supply AC or DC (-) minus pole, GND
OUTPUT
3. +| analog output 0-10 V
4. GND| output – minus pole, GND

8. COM| output relay, common contact
9. NO| output relay, normally open contact

Jumpers

Measuring range setting

Factory setting

Setting the relay switching level using rotary selector

The 0 – 100% selector setting corresponds to the value of selected CO2 measuring range – see example below.

The relay switches on when the level measured value rises above the level of the rotary selector. The relay switches off when the level measured value falls below the level of the rotary selector minus hysteresis value of 5% from measuring range. Minimal lag between changes in state relays are 2 minutes.

Selector value| CO2 (1000pm)| CO2 (2000pm)| CO2 (5000pm)
---|---|---|---
0 %| 0| 0| 0
10 %| 100| 200| 500
20 %| 200| 400| 1000
30 %| 300| 600| 1500
40 %| 400| 800| 2000
50 %| 500| 1000| 2500
60 %| 600| 1200| 3000
70 %| 700| 1400| 3500
80 %| 800| 1600| 4000
90 %| 900| 1800| 4500
100 %| 1000| 2000| 5000

Relay switching example – selected measuring range 2000ppm, hysteresis 5% = 100ppm, selected switching level value 50% (50% correspond to 1000ppm CO2)

Sensor connection using the output relay

Sensor connection – direct EC motor control using signal 0-10 V

If you connect other devices or more sensors to the same AC power source as the NL sensor, it is necessary to meet GND wiring of all analog inputs and outputs, as well as power wires.

Dimensions

Sensor assembly

Box color

Front: white – RAL9016. Base: gray – RAL7035.

Way to use

The product is intended for indoor use only. You can read the recommendations for sensor placement on  our web pages. It is necessary to avoid severe mechanical shock of the sensor.

End of product life

Discard the product in according to the electronic waste law and the EU directives.

The producer reserves the right of technical changes in order to product improvements its properties and functions without previous notice.

Customer Support

Protronix s.r.o., Pardubická 177, Chrudim 537 01, Czech Republic www.protronix.cz/en/ | www.careforair.eu/en/

References

• Home | Air Quality Sensors – Protronix S.r.o.
• Protronix s.r.o. – production and development of electronics – Protronix s.r.o. – production and development of electronics
• Home | Air Quality Sensors – Protronix S.r.o.
• Protronix s.r.o. – production and development of electronics – Protronix s.r.o. – production and development of electronics

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>