Wind Speed Sensor Professional S Type Integrated High Accuracy 3 Cups Wind Direction Sensor for Industry Agriculture 0‑5V Item Type: Wind Speed Sensor Material: ABS. Aluminum Alloy Weight: Approx. 1569g/55.3oz Size: Approx. 458x232mm / 18.03x9.13in Measurement Object: Wind Speed, Wind Direction Signal Output: 0-5V Measuring Range: Wind Speed 0-45m/S Cable Length: Approx. 5.2m/17.1ft Accuracy: Wind Speed: ± (0.3 + 0.03v) M/S (V Represents the Real Time Wind Speed Value), Wind Direction: ± 3° Resolution: Wind Speed: 0.1m/S, Wind Direction: 1° Start-Up Wind Speed: ≤0.5m/S Maximum Power Consumption: 0.9W Load Capacity: DC12V Power Supply, Current Type Output Impedance ≤ 350Ω DC24V Power Supply, Current Type Output Impedance ≤900Ω Operating Environment: Temperature -35℃-60℃ Humidity ≤100 Percent Rh Without Condensation Guard Grade: IP64 Widely Used In: Meteorology, Ocean, Environment, Airports, Ports, Laboratories, Industry and Agriculture, And Transportation. Calculation Formula: 0-5V: F=V/5xA+B F: Indicates the Wind Speed or Direction Sensor Value, M/S or °; A: Sensor Range Width (Upper Range Limit Minus Lower Limit); B: Sensor Range Minimum (Lower Range Limit); Four Installation Methods: 1. Horizontal Bottom Mounting, Wind Direction Must Face Up; 2. Horizontal Top Mounting, Wind Direction Must Face Up; 3. Vertical Side Mounting, Wind Direction Must Face Up; 4. Pole Mounting, Wind Direction Must Face Up; Note: Wind Direction Must Face Up Wire Color Output Signal (Voltage) Red Power Positive Green Power Negative and Signal Ground White Wind Speed Signal Blue Wind Direction Signal Standard for ModBus RTU telecommunication protocol : Serial format: data bit 8 bits, stop bit 1 bit, parity bit None, default baud rate 9600bps, serial debugging software set to hex send and receive, two telecommunication intervals of at least 500ms or more, CRC in the manual for the parity bit, 2 bytes. The default device address is 1. for Modbus CRC checksum steps : 1. Preset the 16 bit register as hexadecimal FFFF, call this register as CRC register; 2. Isolate the first 8 bit data with the lower bit of the CRC register, and put the result in the CRC register; 3. check the lowest bit by shifting the contents of the register one bit to the right (towards the lower bit) and filling the highest bit with a 0; 4. if the lowest bit is 0: repeat step 3 (shift again) if the lowest bit is 1: the CRC register is iso orthogonal to the polynomial A001 (1010 0000 0000 0001); 5. Repeat steps 3 and 4 until it is shifted right 8 times so that the entire 8-bit data is all processed; 6. repeat steps 2 through 5 for the next 8 bit data; The final CRC register obtained is the CRC code (The CRC code obtained is low front high back). Troubleshooting : 1. The wind blades does not rotate properly and has a large hysteresis. There is foreign matter in the bearing or jammed due to long term use. Please send the sensor back to the company for processing; 2. Analog signal or for RS232, for RS485 output when the meter display value is not correct. It may be due to wiring problems or telecommunication serial port failure to obtain the correct data. Please check whether the wiring is correct and firm, whether the serial port is occupied and whether the serial port is set correctly.