User manual VAISALA WMS302

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[. . . ] 11 Recommended Mast Length on the Top of a Building . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 WMS302 Factory Alignment (Models with the Alignment Sleeve) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 WMS Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Dimensions (in mm) of the Combined Wind Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The balanced wind vane is integrated in the housing, underneath the cup wheel. The circular tail is located far enough from the body and the cup wheel to avoid turbulence due to these structures. The vane assembly is made of PA reinforced with glass fiber providing durable and lightweight structure with fast response and low inertia. The angular position of the vane is detected using an axial symmetric rotating potentiometer. The potentiometer features low starting and running torque, linear arc-toresistance transfer ratio, and long operation life. 0212-220 Figure 1 WMS Series Combined Wind Sensor The following numbers refer to Figure 1 above: 1 2 3 = The cup wheel assembly = The vane assembly = The sensor compartment WMS301 is equipped with a one-wiper type potentiometer with an open gap of only 5 degrees. With constant voltage applied to the potentiometer, the output voltage is directly proportional to the azimuth angle. 8 ______________________________________________________ M210375en-A Chapter 2 ____________________________________________ Product Overview WMS302 has a two-wiper type potentiometer to overcome the wind direction discontinuity. 1 2 3 4 5 = = = = = +Vref, voltage input DIR, signal output, wind direction GND, ground GND, ground SPD, signal output, wind speed 0212-223 Figure 5 WMS302 Connector The following numbers refer to Figure 5 above. 1 2 3 4 5 = = = = = +Vref, voltage input DIR1, signal output, wind direction GND, ground DIR2, signal output, wind direction SPD, signal output, wind speed VAISALA__________________________________________________________13 User's Guide ________________________________________________________ A pull up resistor, for example, 10 k, is needed at SPD output to supply the anemometer electronics. It is recommended to use a Schmitt-trigger input with the SPD signal. Installation Procedure Initial Check After you have unpacked the sensor, check for any signs of shipping damage. Before installation, use an ohmmeter to check the proper operation of speed (SPD) and direction (DIR1 and DIR2) outputs while rotating the cup wheel and vane slowly. For measuring the direction, note that 10 k/360º and 10 k/180° potentiometers are used with WMS301 and WMS302 respectively. For the principal circuit diagrams, refer to Figure 6 below and Figure 7 on page 15. 0212-224 Figure 6 WMS301 Principal Circuit Diagram 14 _____________________________________________________ M210375en-A Chapter 3 __________________________________________________ Installation 0212-225 Figure 7 WMS302 Principal Circuit Diagram The WMS302 sensor is aligned at the factory according to Figure 8 below. This factory alignment applies to all models with the alignment sleeve. The alignment sleeve is secured with a small size Allen bolt to the sensor body. 0212-226 Figure 8 WMS302 Factory Alignment (Models with the Alignment Sleeve) VAISALA__________________________________________________________15 User's Guide ________________________________________________________ Mounting Mounting Sensor to the Wind Sensor Mast After a proper location for wind measurement has been selected, you can mount the sensor to the wind sensor mast. Fit the cable (number 2 in Figure 9 below) through the mounting piece (3) and connect the cable to the sensor. 0212-227 Figure 9 2. 3. Mounting of the Combined Wind Sensor Place the mounting piece (3) on the top of the mast and align the tap (5) to north. Align the notch (4) to the tap (5) and attach the sensor to the mounting piece with the plastic collar (1). 16 _____________________________________________________ M210375en-A Chapter 3 __________________________________________________ Installation 4. 7. Secure the mounting piece (3) to the mast by tightening the mounting screw (6). Route the sensor cable down along the mast and always attach the cable to the mast with cable ties. Mount the wind sensor mast firmly to a solid base, for example, to a pole mast. Connect the signal cable to a data logger or display device. Mounting to a Pole Mast with WMS30KIT You can mount the wind sensor with a mast on the top of a pole mast using WMS30KIT. You can mount the wind sensor mast to a metallic or wooden mast. WARNING Do not install the wind sensor above the top of the lightning protection rod. To mount the wind sensor mast to a metallic mast, do the following (the numbers refer to Figure 10 on page 18): 1. [. . . ] - Input power source type, voltage and list of other items (lighting, heaters, motors etc. ) that were connected to the same power output. Include a detailed return address with your preferred shipping method on the Problem Report. Pack the faulty product using an ESD protection bag of good quality with proper cushioning material in a strong box of adequate size. Send the box to: Vaisala Oyj SSD Service Vanha Nurmijärventie 21 FIN-01670 Vantaa Finland 3. 6. 26 _____________________________________________________ M210375en-A Chapter 6 _______________________________________________Technical Data CHAPTER 6 TECHNICAL DATA This chapter provides the technical data of WMS301 and WMS302 Combined Wind Sensor. Specifications Table 5 Anemometer Specifications Description/Value Dual Reed switch 0. 5 . . . [. . . ]

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