HOME ꄲ Smart Sensor ꄲ IR CO2 transmitter (CO2+Temperature+Humidity sensor)

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IR CO2 transmitter (CO2+Temperature+Humidity sensor)

Product Details

Chapter 1 Product Introduction

1. Product overview

The transmitter is widely used in air quality testing equipment, breeding systems, greenhouses and other occasions that require CO2, temperature and humidity monitoring. The Input power supply in the sensor, sensor probe, the three parts of signal output are completely isolated.

It is safe and reliable, beautiful in appearance and easy to install.

The sensor uses more advanced and expensive electrochemical probes, which have higher accuracy and stability than traditional semiconductor probes.

1. Features

This product uses a high-sensitivity infrared gas detection probe with stable signal and high accuracy. It has the characteristics of wide measuring range, good linearity, easy to use, easy to install, and long transmission distance.

1. The main parameters

Power supply	10~30V DC
Average power consumption	0.18W
output signal	485
Temperature measurement range	-40℃~+80℃
Humidity measurement range	0~100%RH
Temperature accuracy	±0.5℃
Humidity accuracy	±3%RH
CO2 measuring range	0-5000ppm
CO2 resolution	1ppm
CO2 accuracy	±3%FS
Zero drift	±3ppm
Operating temperature	-20~50℃
Working humidity	15~90%RH No condensation
stability	≤2%Signal value/month
Response time	≤30S
Preheat time	≥5 minutes
Repeatability	≤2%
Pressure range	90~110Kpa

All the above specifications are measured under environmental conditions: temperature 20℃, relative humidity 50%RH, 1 atmosphere, and the maximum concentration of the gas to be measured does not exceed the sensor range.

Size: 110×85×40mm

1.4 System framework diagram

This product can also be used in combination of multiple sensors on a 485 bus. In theory, a bus can be used for 254 485 sensors, and the other end is connected to a PLC with a 485 interface, connect the single-chip microcomputer through the 485 interface chip, or use the USB to 485 to connect to the computer, and use the sensor configuration tool provided by our company for configuration and testing

(only one device can be connected when using the configuration software).

1.5 Product selection

XK	Company code
	102				Wall-mounted king-shaped shell
					Wall-mounted king-shaped shell LED display (Ammonia temperature and humidity three-in-one transmitter does not have this model)
	CO2-				Ammonia transmitter
	CO2WS				Ammonia temperature and humidity integration
		N01			485 (Modbus protocol) output
			5000P		Corresponding range 0~100ppm
			10000P		Corresponding range 0~200ppm
				2	Built-in PE head, select this model for single ammonia gas
				4	Built-in hardcover probe, ammonia temperature and humidity integrated default this model
				5	Extra hardcover probe, this model is optional for three in one

Chapter 2 Hardware Connection

2.1 Inspection before equipment installation

Equipment List:

■1 CO2 transmitter equipment

■Product certificate, bubble bag

2.2 Interface description

The power interface is a wide voltage power input, 10-30V can be input. When wiring the 485 signal wire, pay attention to the two wires A and B that cannot be reversed, and the addresses of multiple devices on the bus cannot be conflicted.

2.2.1 Sensor wiring

	Thread color	Description
power supply	red	Positive power supply (10~30V DC)
power supply	black	Power negative
Communication	yellow	485-A
Communication	blue	485-B
Infrared probe life is more than 5 years

2.3 Installation method

Chapter 3 Configuration Software Installation and Use

Our company provides the supporting "XK test configuration software", which can easily use the computer to read the parameters of the sensor, and flexibly modify the device ID and address of the sensor to complete the firmware upgrade through the serial port (users are not recommended to use this function, only product customization needs Of customers use this feature).

Note: When using the software to obtain automatically, you need to ensure that there is only one sensor on the 485 bus.

3.1 Connect the sensor to the computer

After connecting the sensor to the computer via USB to 485 and supplying power, you can see the correct COM port in the computer (check the COM port in "My Computer—Properties—Device Manager—Port").

Open the data package, select "Debugging Software"---"485 Parameter Configuration Software", find and open it.

If the COM port is not found in the device manager, it means that you have not installed the USB to 485 driver (included in the data package) or the driver has not been installed correctly, please contact a technician for help.

3.2 Use of sensor monitoring software

①. The configuration interface is shown in the figure. First, obtain the serial port number according to the method in chapter 3.1 and select the correct serial port.

②. Click the test baud rate of the software, the software will test the baud rate and address of the current device, the default baud rate is 9600bit/s, and the default address is 0x01.

③. Modify the address and baud rate according to the needs of use, and at the same time, you can query the current function status of the device.

④. If the test is unsuccessful, please recheck the equipment wiring and 485 driver installation.

You can click Auto search to automatically search for online devices. At this time, only one device is allowed to be connected to the 485 bus. After the address search is completed, you can use the debugging software to modify the address baud rate. Firmware upgrade.

Chapter 4 Communication Protocol

4.1 Basic communication parameters

Code	8-bit binary
Data bit	8-bit
Parity bit	no
Stop bit	1 person
Error checking	CRC(Redundant cyclic code)
Baud rate	2400bit/s、4800bit/s、9600 bit/s can be set，The factory default is9600bit/s

4.2 Data frame format definition

Using Modbus-RTU communication protocol, the format is as follows:

Initial structure ≥ 4 bytes of time

Address code = 1 byte Function code = 1 byte Data area = N bytes

Error check = 16-bit CRC code

Time to end structure ≥ 4 bytes

Address code: the address of the transmitter, which is unique in the communication network (factory default 0x01).

Function code: The command function instruction issued by the host, this transmitter only uses function code 0x03 (read register data).

Data area: The data area is the specific communication data, pay attention to the high byte of the 16bits data first.

CRC code: two-byte check code.

Host query frame structure:

address

code

function

code

address

length

Check code

low bit

High bit of

check code

1 byte

2 byte

1 byte

Slave machine response frame structure:

address

code

function code

Number of

valid bytes

Data area

Second data

area

Nth data

area

Check code

1 byte

2 byte

4.3 Register address

Single CO2 device (other registers are the same, register 0 1 defaults to put CO2 concentration compatible with other devices)

PLC or configuration address

content

operating

Scope and definition

0004 H

40005

CO2 Concentration value

Read only

0~5000

Correspond CO2 0-5000ppm

NH3 temperature and humidity integrated equipment

Register address	PLC or configuration address	content	operating	Scope and definition
0000 H	40001	Humidity value	Read only	0~1000 (The value after 10 times expansion)
0001 H	40002	Temperature value	Read only	-400~800 (The value after 10 times expansion)
0004 H	40005	CO2 Concentration value	Read only	0~5000 Correspond CO2 0-5000ppm
006A H	40107	Temperature calibration value	Read and write	10 times larger write
006B H	40108	Humidity calibration value	Read and write	10 times larger write
006C H	40109	CO2 Calibration value	Read and write	Actual value write
0064 H	40101	Device address	Read and write	1~255(Factory default 1)
0065H	41002	Device baud rate	Read and write	1 representative 2400 2 representative 4800 3 representative 9600

4.4 Communication protocol example and explanation

4.4.1 Read the CO2 value of the device address 0x01

Interrogation frame

address

code

function

code

starting

address

Data

length

Check code

low bit

High bit of

check code

0x01

0x03

0x00 0x04

0x00 0x01

0XC5

0xCB

Response frame (for example, reading CO2 is 500ppm)

address

code

function

code

Returns the

number of valid bytes

CO2 value

Check code

low bit

High bit of

check code

0x01

0x03

0x02

0x01 0xF4

0xBF

0x06

CO2：

1F4 H(Hexadecimal) =500 => CO2=500 ppm

4.4.2 Read the temperature, humidity and CO2 value

of the device address 0x01

Inquiry frame 000000-Tx: 01 03 00 00 00 04 44 09

address

code

function

code

starting

address

Data length

Check code

low bit

High bit of

check code

0x01

0x03

0x00 0x00

0x00 0x04

0x44

0x09

Response frame

(for example, temperature value -7.5℃, humidity value 35.9%, NH3 value 500ppm)

address

code

function

code

Number of bytes

Humidity

value

Temperature

value

Air

pressure

CO2

CRCL

CRCH

0x01

0x03

0x08

0x01

0x67

0xFF 0xB5

0x00

0x01

0xF4

0x34

0x89

Reserved air pressure register

Temperature:

When the temperature is lower than 0℃, upload in the form of complement code.

FFB5 H (hexadecimal) = -75 => temperature = -7.5℃

Humidity:

167 H (hexadecimal) = 359 => humidity = 35.9%RH

NH3：

1F4 H(hexadecimal) =500 => CO2=500 ppm

Chapter 5 Common Problems and Solutions

No output or output error

possible reason:

The computer has a COM port, and the selected port is incorrect.
The baud rate is wrong.
The 485 bus is disconnected, or the A and B wires are reversed.
If the number of equipment is too much or the wiring is too long, power supply

should be nearby, add 485 booster, and add 120Ω terminal resistance.

The USB to 485 driver is not installed or damaged.
Equipment damage.

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Jinan Rainbow Technology is a high-tech enterprise with MEMS technology and AI algorithms as its core. It was established in Jinan, Shandong, China and has an R&D center in New York, USA. We are focused on the design and production of MEMS sensor, Mass flow sensor, and Energy Storage Safety Sensor Solution, and exploit the new markets through new technology.

Rainbow Technology's products are widely used in many fields such as Hydrogen Fuel cells, gas detector, medical devices, air purification, smart home, lithium battery thermal runaway, and energy storage to meet the needs of safety, health, and energy conservation.
Through continuous technological innovation, Jinan Rainbow Technology possess core capabilities in design and manufacturing to provide customers with high precision, highly reliable products and One-Stop Solutions. Our aim is to promote more products cored with MEMS technology, provide more energy storage safety solutions. Contribute to the safer, more stable, and sustainable development of the energy storage industry.

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With the goal of standing at the forefront of technology, we are committed to promoting the development of MEMS technology with the spirit of "protecting the Earth with core technology and innovating to change lives".