FT FT742 - Default Chapter; Table of Contents

2 FT742-DM (RS485) Sensors – User Manual
Contents
Product Symbols ...................................................................................................... 4
Safety Instructions ................................................................................................... 5
Consignes de sécurité ............................................................................................. 6
1 INTRODUCTION ................................................................................................. 7
1.1 Product Overview ................................................................................................................ 7
1.2 Build Versions and Labelling ............................................................................................. 7
1.3 Scope of Use ........................................................................................................................ 7
1.4 Disclaimer ............................................................................................................................. 8
2 FUNCTIONAL DESCRIPTION ........................................................................... 9
2.1 Technical Performance ....................................................................................................... 9
2.2 Wind Speed Calibration .................................................................................................... 10
2.3 Wind Speed and Direction Filtering ................................................................................. 10
2.4 Electronic Rotation of the Datum Direction .................................................................... 11
2.5 Selective Filter Scheme ..................................................................................................... 11
2.6 Error Detection ................................................................................................................... 11
2.7 Overspeed Warning Scheme ............................................................................................ 11
2.8 Heater Setup ....................................................................................................................... 11
2.9 Low Power Operation ........................................................................................................ 12
3 MECHANICAL & ELECTRICAL INSTALLATION ............................................ 13
3.1 Connector Details .............................................................................................................. 20
3.2 Cable Details ...................................................................................................................... 20
3.3 Lightning, Surge & EMI protection .................................................................................. 21
4 SERVICE, CONFIGURATION & TESTING ...................................................... 23
4.1 Inspection ........................................................................................................................... 23
4.2 Fault Finding & Troubleshooting ..................................................................................... 24
4.3 Returns ............................................................................................................................... 25
4.4 The Acu-Test Pack ............................................................................................................. 26
4.4.1 The Acu Vis PC Software ................................................................................................ 26
4.4.2 FT054 Evaluation Cable .................................................................................................. 27
5 SENSOR COMMUNICATION ........................................................................... 29
5.1 Introduction ........................................................................................................................ 29
5.2 RS485 Protocol .................................................................................................................. 29
5.3 Configuring the Sensor ..................................................................................................... 30
5.4 Communication .................................................................................................................. 30
5.4.1 Conventions used in this manual .................................................................................... 30
5.4.2 Data Transmission .......................................................................................................... 31