PROTRONIX Room Sensor NL-ECO-CO2Room Sensor NL-ECO-CO2 User Manual

User manual

NL-ECO-CO2 | Room sensor CO2
Room sensor NL-ECO-CO2 is used to monitor air quality inside buildings and effectively control ventilation (HVAC) systems according to the actual level of internal air quality. The sensor measures the concentration of carbon dioxide (CO2) in the air. It can be effectively used in offices, 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)
• 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.
Ventilation and heat recovery units can be directly controlled based on the output signal of the sensor in a very efficient way.
The trigger level of the CO2 concentration output relay can be set by a rotary element.
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.
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.
Ventilation and heat recovery units can be directly controlled based on the output signal of the sensor in very efficient way.
The trigger level of the CO2 concentration output relay can be set by a rotary element.
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.

Technical data:

12 – 24
V DC
VAC
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
3. Voltage output| 0 – 10 V DC
   Max. switching voltage| 250/30 V AC / V DC
   Max. switching current| 5/5 A AC / A DC
   Working humidity
   noncondensing| 0 – 95 % RH
   Working temperature| 0 to +50 °C
   Storage temperature| -20 to +60 °C
   Expected lifetime| 10 years
   Ingress protection| IP20
4. Voltage output| 0 – 10 V DC
   Dimensions| 90x80x31 mm

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

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

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:
Room sensor CO2
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.
-the optimal balance of air quality and energy
-consumption for ventilation and air condition
-maintaining the CO2 concentration in this the range does not significantly reduce the 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 is on.
The declared accuracy is reached after 4 days of continuous power supply.
Sensor failure indication
All three LEDs light up at the same time permanently.
Electronic board controls and terminals
Terminals

OUTPUT

Jumpers

Measuring range setting

Factory setting

Setting the relay switching level using the rotary selector
The 0 – 100% selector setting corresponds to the value of the 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 the hysteresis value of 5% from the measuring range. The minimal lag between changes in state relays is 2 minutes.

Relay switching example – selected measuring range 2000ppm, hysteresis 5% = 100ppm, selected switchinglevel 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 the 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 the severe mechanical shock of the sensor.
End of product life
Discard the product according to the electronic waste law and the EU directives.
The producer reserves the right of technical changes in order to produce improvements its properties and functions without previous notice.

Protronix s.r.o., Pardubická 177, Chrudim 537 01, Czech Republic um-nl-eco- co2-en-v8-210107.docx

www.protronix.cz/en
www.careforair.eu/en

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