Summary of Contents for ADTEK WSA
- Page 1 Duct Type Wind Speed Sensor Operation Manual Rev 1.0 *575341-4d-454e-53-41* 2021-12-22...
- Page 2 Contents 1. Installation ........................1 2. Dimensions ........................1 3. Seting The Measuring Range For Wind Speed .............2 4. Connection Instruction ....................2 5. Calculation ........................3 6. RS-485 Communication ....................4 7. Troubleshooting ......................5...
- Page 3 Installation The sensor should be installed on sides or underneath the ducting instead of installing top down. Firstly, drill a hole (hole diameter: Ø20mm) on the ducting, put the air pipe in the hole, and adjust the arrow mark and wind direction in the same direction. Then place 3 screws on the plate flanges, adjust the height of the sensor with the plate flanges, and lock the screws (see the picture below).
- Page 4 Setting The Measuring Range For Wind Speed The setting range of analogue output on the transmitter can be adjusted by the dip switches on the sensors. You will see the di p switches after taking 4 screws out of the case of the transmitter. Then you are able to adjust the setting range with the dip switches (see the figure below).
- Page 5 Calculation 5.1 Current to analogue output For instance, if the setting range: 0~30.0m/s, output: 4~20mA, output signal: 12mA, and it has to be caculated based on 16mA, it will be 30.0m/s/16mA=1.875m/s/mA, which means 1mA stands for 1.875m/s (wind speed change), measuring value, 12mA-4mA=8mA, 8mA*1.875m/s/mA=15.0m/s.
- Page 6 RS-485 Communication 6.1 Parameters Protocol: Modbus RTU mode Address: 1~255 Baud rate: 2400, 4800(default), 9600 Parity: None Data bits: 8 bits Stop bit: 1 bit Distance: 1500 M (max) Terminate resistor: 120~300Ω/0.25W(typical: 150Ω 6.2 Address setting The address can be set through the communication and dip switches. It is able to choose only one way to proceed each time.
- Page 7 7. Troubleshooting 7.1 Sensors can't connect with PLC/ PC (1) Connect with incorrect COM port (2) Incorrect address or duplicate address (3) Incorrect setting: baud rate, correction, data bits, stop bits (4) Time interval and reponse time should be set at least 200ms. (5) RS-485 cable breaks, or reverse wiring( A line, B line) (6) It must go with RS-485 extender and terminate resistor （...
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