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FT702LT/D Wind Sensor Manual
Analogue Flat Front Variant
FT TECHNOLOGIES LTD.
TEL: +44 (0)20 8943 0801
SUNBURY HOUSE
FAX: +44 (0)20 8943 3283
BROOKLANDS CLOSE
WEB: www.fttechnologies.com
SUNBURY-ON-THAMES
E-MAIL: info@fttechnologies.com
MIDDLESEX TW16 7DX
A4239-6-EN
July 2017
The FT and Acu-Res logos are registered trademarks of FT Technologies Ltd
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FT702LT/D Flat Front Wind Sensor Manual
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Table of Contents
Related Manuals for FT Technologies FT702LT/D
Summary of Contents for FT Technologies FT702LT/D
- Page 1 TEL: +44 (0)20 8943 0801 SUNBURY HOUSE FAX: +44 (0)20 8943 3283 BROOKLANDS CLOSE WEB: www.fttechnologies.com SUNBURY-ON-THAMES E-MAIL: info@fttechnologies.com MIDDLESEX TW16 7DX A4239-6-EN July 2017 The FT and Acu-Res logos are registered trademarks of FT Technologies Ltd FT702LT/D Flat Front Wind Sensor Manual...
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Page 2: Table Of Contents
Quick Start Steps ......................24 CHANGING SETTINGS ..................25 Installing the Configuration Program................25 Configuring the FT702LT/D ....................25 Change Settings ......................26 Sensor Report .........................26 Current Loop Test ......................27 Reading the Wind Data ....................28 Wind Sensor Mode Warning ...................28 FT702LT/D Flat Front Wind Sensor Manual... - Page 3 This du produit doivent être recyclés. Cela should be done by returning the product to doit être fait par le retour du produit à FT FT Technologies or by using an appropriate Technologies utilisant waste disposal company. This product entreprise d'élimination de déchets.
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Page 4: Safety Instructions
In accordance with the instructions set out in this manual, observing all information, warnings and instructions In accordance with any other instructions or guidance FT Technologies provide To ensure that the product remain compliant with the electrical safety requirements of the UL / CSA 61010-1 standards, the equipment must be;... - Page 5 Conformément aux instructions figurant dans ce manuel et en observant toutes les informations, avertissements et instructions. Conformément à d'autres instructions ou directives que FT Technologies fournit. Pour garantir que le produit reste compatible avec les exigences de sécurité électrique de l'UL/CSA 61010-1 normes, l'équipement doit être ;...
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Page 6: Introduction
INTRODUCTION 1.1 Product Overview The FT702LT/D is a solid-state ultrasonic wind sensor which uses a patented Acoustic Resonance airflow sensing technique to measure accurately both wind speed and direction. The FT702LT/D has been specifically designed to operate in harsh environments such as offshore and lightning and ice-prone areas. The wind sensor has no moving parts to degrade or wear-out and is designed for applications requiring high reliability. -
Page 7: Build Versions And Labelling
99.9% or better availability of wind speed and wind direction readings. No promise in part or full can be given to guarantee an FT702LT/D wind sensor’s continuous operation, as exceptional circumstances can occur that may result in the failure of the output from a sensor. Exceptional circumstances can include;... -
Page 8: Disclaimer
FT Technologies can take no responsibility for the effectiveness of any sensor lightning protection scheme implemented. The wind sensor has passed a wide range of EMC tests but FT Technologies does not warrant the sensor to survive direct lightning strikes. -
Page 9: Functional Description
1. All specifications subject to change without notice 2. The Configuration Port is provided to allow the user to change the internal settings of the FT702LT/D and to perform diagnostic testing. This interface should only be used for configuration and test purposes. This interface is not intended for permanent connection to the turbine controller. -
Page 10: Current Loops
The other wire must then be connected through a current meter to ground. This is because the FT702LT/D current loops sink current, they do not source it. A common supply can be used if required. - Page 11 50 The additional C-Code label and number The C-Code:01 label is sometimes also XX is used to identify the type of attached calibration applied Figure 6: Build version 22 sensor calibration label examples FT702LT/D Flat Front Wind Sensor Manual...
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Page 12: Wind Direction Loop
The datum direction can be electronically rotated (either clockwise or counter clockwise) in 1 deg increments using the FT702LT/D Set Up and Test Program (see section 5) to apply this adjustment. Once the datum offset has been set it will be retained in the FT702LT/D Flash memory. -
Page 13: Error Detection
Error Detection If the FT702LT/D detects that a reading may be invalid this is signalled to the controller or data logger by setting the current of both loops to a value of 1.4mA by default. The error current level can be configured (see Section 5) by the user from 1.4mA up to 3.9mA in steps of 0.1mA (only available from build version 22 and above). -
Page 14: Installation
3.1.2 Cable Details The mating connectors for the FT702LT/D are suitable for use with cables with overall diameters of up to 9mm and for individual cores of diameters of up to 1.2mm. Cable such as SD980CPTP 3x2x0.5mm2 from SAB Brockskes or similar types may be used. Care must be taken to ensure that the cable is suitable for the environment it will be used in and is adequately approved, for example AWM Style 21198. -
Page 15: Mounting The Ft702Lt/D
3.2 Mounting the FT702LT/D The FT702LT/D is designed to be mounted using an M6 socket head cap screw, nut and washer. The mounting flat on the support tube of the sensor (see Figure 1) allows for firm fitting against a flat surface. The preferred finish of the screw, nut, washer and the mounting bar is hot dipped galvanised steel. -
Page 16: Alignment
Figure 13: FT702LT/D-FF with protective sleeve 3.2.1 Alignment The FT702LT/D measures the wind direction relative to the mounting flat and bar. When the wind sensor is correctly aligned the wind direction measurements will be as shown in Figure 14. Figure 14: Correct Sensor Alignment... -
Page 17: Lightning Protection And Emc
50mm (see Figure 19). The length of any grounding wire or strap must be kept to a minimum. This will help to provide the lowest possible impedance path to the ground reference. FT702LT/D Flat Front Wind Sensor Manual... - Page 18 *The standards for Lightning Protection of Wind Turbines are described in IEC 61400-24. The installation instructions in this manual should be sufficient to ensure that the lightning protection zone around the sensor will achieve a lightning protection level of LPZ0B as described in the standard. FT702LT/D Flat Front Wind Sensor Manual...
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Page 19: Protection Against Indirect Lightning Effects And Electromagnetic Interference
20kA (8/20µs) and be capable of clamping the output below the maximum input voltage accepted by the electronic systems they are connected to. This will prevent any surges or large voltage differences being present at the inputs to the wind sensor, data acquisition electronics or power supply. FT702LT/D Flat Front Wind Sensor Manual... - Page 20 The SPDs should also be grounded appropriately. Figure 19 shows how the SPDs should be installed. Figure 19: FT702LT/D analogue interface surge protection The supply pair [24VDC / 0VDC] is electrically isolated from the other lines and the chassis. The four current loop signals are isolated from the power supply lines and the chassis.
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Page 21: Inspection Of The Ft702Lt/D
Please note excess water droplets can be removed by lightly blowing or shaking the sensor. FT702LT/D Flat Front Wind Sensor Manual... -
Page 22: Fault Finding & Troubleshooting
Please contact FT Technologies for further information and advice if required. 3.6 Returns If a sensor appears to be faulty, please contact FT Technologies and request a Returns Materials Authorisation (RMA) form. Please complete the form and return as instructed. Returns cannot be accepted without prior approval via this authorisation form. -
Page 23: Evaluation
4.2 Wiring Diagrams The FT702LT/D can be easily tested by connecting a DC ammeter in series with each current loop. A positive supply must be provided to one of the current loop wires. The other wire must then be connected through an ammeter to ground. -
Page 24: Quick Start Steps
4.3 Quick Start Steps 1. Remove the FT702LT/D sensor and FT055 cable from its packaging and mate the connectors together. 2. Connect the +24 VDC terminal of the power supply (current limit set to 6A) to the white wire and 0V terminal to the brown wire. -
Page 25: Changing Settings
5 CHANGING SETTINGS The FT702LT/D is fitted with a 2 wire serial interface. This interface is provided to allow the user to change the internal settings of the FT702LT/D and to perform diagnostic testing. This interface should only be used for configuration and test purposes. -
Page 26: Change Settings
Always click on the Disconnect button and then exit the Set-Up and Test Program before unplugging or powering down the FT702LT/D. The FT702LT/D Set-Up and Test Program cannot be used to configure any other FT Technologies products. 5.3 Change Settings The settings can be changed on a sensor by using the Settings tab. -
Page 27: Current Loop Test
Figure 26: FT702LT/D Set-Up and Test Program Loop Test To run the test select the Loop Test Tab, and click the Start Test button in the FT702LT/D Set-Up and Test Program as shown in Figure 26. FT702LT/D Flat Front Wind Sensor Manual... -
Page 28: Reading The Wind Data
5.7 Wind Sensor Mode Warning The state of the current loops is indicated at all times at the top of the program. When the FT702LT/D is in communication with a computer it is in a digital mode and the current loops are disabled. If the sensor is disconnected from the computer with the current loops disabled, the sensor will remain in this digital mode and the current loops will not work.
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