R68 is a highly integrated instrument developed for the smart lamp pole industry, which monitors eight parameters including atmospheric temperature, humidity, wind speed, wind direction, illumination, noise, PM2.5 and PM10. It can realize 24-hour continuous online monitoring of outdoor meteorological parameters, and output all parameters to users at one time through digital communication interface.

Air quality monitoring micro station can be applied to urban grid environmental monitoring and control, intelligent street lamps, scenic area environmental monitoring, factories or mines, construction sites (site dust monitoring), urban roads, highways, public places and other places related to air quality monitoring.

This product can be optional electronic compass function

Installation:

Direction Option

Note: Arrow indicating location

When installing the device, the arrow of the positioning indicator marked on the device should point to the north direction. The value of north of the device is 0°, increasing clockwise. 90 degrees is east. Electronic compasses do not require pointing north installation.

It is best to use a device with magnetic deflection correction when looking north, or if not, adjust it according to the latitude and longitude of the device installed.

Installation Position Selection

When selecting an installation position, observe the following principles:

1. Ensure that there is no ultrasonic equipment of the same type around to avoid mutual interference;

2. The installation site should be open land, downwind side;

3. The installation height should not be less than 1.5m, and the installation distance from the nearest obstacle should be more than 10 times the height of the brick building;

4. If radiation parameters are included, it should be installed in an open field; The whole height Angle range is from sunrise to sunset, and the elevation Angle of obstacles within the range is no more than 5° without any shadow falling on the sensor, avoiding thermal radiation, steam and bright color buildings.

Flange Fixing

Sleeve Type Fixation

Dimensions:

Inner diameter: 49.8mm

Outer diameter: 70mm

Cable Sequence Definition

Figure 1: Four-core cable aerial plug is defined as follows: RS485 communication

1. Powered: positive
2. Powered: negative
3. RS485: A
4. RS485: B

Figure 2: Five-core cable aerial plug is defined as follows: RS485 communication

1. Powered: positive
2. Powered: negative
3. RS485: A
4. RS485: B

Wiring Definition

Incorrect wiring can cause permanent damage to the device!

Data Frame Format Definition

1. Using Modbus-RTU communication protocol, the format is as follows:
2. Time for initial structure ≥ 4 bytes
3. Address code = 1 byte
4. Function code = 1 byte
5. Data area = N bytes
6. Error check = 16-bit CRC code
7. Time to end structure ≥ 4 bytes
8. Address code: It is the address of the transmitter, which is unique in the communication network (factory default 0x01).
9. Function code: The instruction function prompt issued by the host, this transmitter only uses the function code 0x03. (reading the memory data)
10. Data area: The data area is the specific communication data area. Note that the upper byte of the 16bits data is at the front.
11. CRC code: 2 byte check code.

Communication protocol examples and explanations

Read the wind speed/wind direction value of at device address 0x012

Information frame

Response frame(For example, read the wind speed value is 1.23m/s)

Wind speed:

011A H(Hexadecimal)=282=>Wind speed=2.82m/s

Wind direction:

0096 H(Hexadecimal)=150=>Wind direction=Southeast by south

Wind direction sensor output value corresponds to wind direction position

For example: wind speed and wind direction: 02 03 00 00 00 02 C4 38