English ABOUT FT WIND SENSORS APPLICATIONS ORDER SUPPORT CONTACT US FT702LM FT702LM FT702 FT722 FT742 WIND SENSOR COMPARISON FT702LM The FT702LM is an ultra-compact anemometer which uses our patented Acu-Res® airflow sensing technology to measure accurately both wind speed and direction. This surface mounted version of the FT702 is designed for OEM integration into a wide range of engineering systems and is currently used in vehicle-mounted and ship-based meteorology, CBRN detection systems, and fixed and portable weather stations. The LM2 version includes an electronic compass. SPECIFICATIONS AT A GLANCE WIND SPEED 0-50m/s Accuracy: ±0.5m/s (0-15m/s) ±4% (>15m/s) WIND DIRECTION 0-360° Resolution: 1° Accuracy: ±4° TEMPERATURE RANGE -40to +85°C Small and easy to heat POWER REQUIRED 66mW Lowest consumption - heaters off DATA AVAILABILITY 99.9% Patented Acu-Res technology gives 5 measurements per second. INGRESS IP67 Fully sealed and corrosion resistant to ISO 9227 & IEC12944. Corrosion class C5M. HEIGHT 78mm Small, compact and easily transported. Ideal for integration. WEIGHT 234g Hard anodised alloy for a lightweight yet rugged sensor. DOWNLOAD DATASHEET FT702LM IN PICTURES FLUSH MOUNTING Designed for OEM integration VIEW INSTALLATION INSTRUCTIONS FLAT SURFACES Installation kept simple ANODISED BASE Screw alignment and sealed connection SIMPLE DESIGN Less obstruction with a compact design INTERFACE AND DATA FORMAT The sensor can output up to 5 readings per second via a RS422 or RS485 interface. There is a 10-way connector in the sensor’s base for the power and data connections. Data is transmitted in digital with serial messages in ASCII. The sensor is NMEA 0183 (MWV sentence) compatible and wind speed measurement in knots is available, making it ideal for use with other marine electronic devices. TECHNICAL SPECIFICATION SENSOR PERFORMANCE Measurement principle: Acu-Res® Technology Acoustic Resonance (compensated against variations in temperature, pressure and humidity) FT patented Acoustic Resonance airflow measuring system Wind Speed Measurement Range: 0-50m/s Accuracy: ±4% Resolution: 0.1m/s Zero Error: ±0.1m/s Wind Direction Measurement Range: 0° to 360° Accuracy: ±4° Resolution: 1° Compass Accuracy (FT702LM2 ONLY): ≤ 5° RMS DATA I/O Interface: RS-422 or RS-485 Format: Full range of user programmable functions. NMEA 0183 (MWV sentence) ASCII data output format. Data Update Rate: 5 measurements per second POWER REQUIREMENTS Anemometer: FT702LM1: 4.4V to 30V dc @15mA (typical – exclude data o/p drive current) FT702LM2: 4.4V to 30V dc @16mA (typical – exclude data o/p drive current) Heater: 10V to 30V dc @ 2.5A (max) PHYSICAL Dimensions: 70mm x 78mm (nominal dia. x height) Weight: 233.5g (sensor stand alone) 250g (with accessories: gasket) Material: Aluminium alloy, hard anodised. I/O Connector: 10 way connector (p/n Harwin M80-867 1022). Mating connector (p/n Harwin M80-8891005) Mounting Method: Threaded holes (M4) x6 in base ENVIRONMENTAL SPECIFICATION Operating Temperature Range: -40° to +85°C Storage Temperature: -40° to +85°C Humidity: 0-100% Dust and Immersion: Sealed to IP67 (when correctly installed with supplied gasket) POWERFUL DE-ICING The FT702LM wind sensor is fitted with heaters to prevent icing. The Acu-Res® software controls these heaters to ensure that the sensor maintains its temperature at a user specified heater set point of between 0⁰C and 55⁰C. Alternatively, the heaters can be disable entirely. In standard format the heaters draw a maximum of 99W. For extreme environments the current limit can be adjusted (power supply and cabling permitting) from 0.1 to 6 Amps. The heaters can also be switched off and then current draw falls to 25mA. The sensor’s small size means that the power is used very effectively ensuring that the sensor can stay ice-free. PRODUCT CERTIFICATION We test every sensor in a wind tunnel before despatch to ensure that it functions correctly. The wind tunnel is calibrated annually and sensors are regularly selected from production and their calibration cross-checked in a MEASNET wind tunnel. This ensures the accuracy of FT sensors. Dust and Immersion: Sealed to IP67 (when correctly installed with supplied gasket) Download EC Declaration of Conformity for the FT702LM Download Environmental Safety Data Sheet for the FT702LM EN 61000-6-3 (2007 inc. A1:2011) Emission standard for residential, commercial and light-industrial environments EN 61000-6-2 (2005) Generic Standard - Immunity for Industrial Environments EN 61000-4-2 (2009) Electrostatic discharge immunity test EN 61000-4-3 (2010) Radiated, radio-frequency, electromagnetic field immunity test EN 61000-4-8 (2010) Power frequency magnetic field immunity test EN 61000-4-9 (2009) Pulse magnetic field immunity test EN 61000-4-10 (1994; A1:2001) Damped oscillatory magnetic field immunity test TRIAL A SENSOR Speak to one of our experts and arrange to trial a sensor. GET A QUOTE Tell us your requirements and we’ll talk prices. INSTALLATION GUIDE View detailed mounting instructions. ACCESSORIES Buy cables, mounting and alignment tools online. KEY LINKS Acu-Res technology Acoustic resonance Ultrasonic wind sensors Ultrasonic anemometers Wind measurement Meteorology Wind turbine control PRODUCTS FT702LT FT702LM FT722 FT742 Accessories NEWSLETTER Sign up here to receive our newsletter SIGN UP FOLLOW US HEAD OFFICE Sterling House 18 Church Road Teddington Middlesex TW11 8PD United Kingdom +44 (0)20 8943 0801 sales@fttech.co.uk Careers Support Contact Terms and Conditions Privacy Policy © 2015 FT Technologies All rights reserved.