FT742
Description
| Feature | FT742 | FT722 | FT702-V22 |
| Speed range | 0-75 m/s | 0-50 m/s | 0-50 m/s |
| Speed accuracy | ±0.3m/s (0-16m/s) ±2% (16m/s-40m/s) ±4% (40m/s-75m/s) | ±0.3m/s (0-16m/s) ±2% (16m/s-40m/s) ±4% (40m/s-50m/s) | ±0.5m/s (0-15m/s) ±4% (16m/s-50m/s) |
| Directional accuracy | Within ±10° datum: 2° RMS > ±10° of datum: 4° RMS | Within ±10° datum: 2° RMS > ±10° of datum: 4° RMS | Within ±10° datum: ±2° > ±10° of datum: ±4° |
| Data update rate | 10Hz | 10Hz | 5Hz |
| Mounting options | Flat Front (FF) Pipe Mount (PM) Direct Mount (DM) Surface Mount (SM) | Flat Front (FF) Pipe Mount (PM) | Flat Front (FF) Pipe Mount (PM) |
| Applications | Wind Turbine Control (FF & PM) Meteorology (DM) OEM Integration (SM) | Wind Turbine Control | Wind Turbine Control |
| Warranty | 2 years | 2 years | 1 year |
| Error flag digital | An invalid reading character of “1”is set in the wind velocity output message. | An invalid reading character of “1”is set in the wind velocity output message. | An invalid reading character of other than 0 is set in the wind velocity output message. |
| Error flag analogue | Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA) | Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA) | Both speed and direction current loops drop to a default value of 1.4mA (configurable to 3.9mA) |
| Over-speed warning digital | An over-speed character of “2” is set in the wind velocity output message. | An over-speed character of “2” is set in the wind velocity output message. | An over-speed character of “2” is set in the wind velocity output message. |
| Over-speed warning analogue | The speed current loop is set to 20.0mA and the direction current loop is set by default to 1.4mA (configurable up to 3.9mA). | The speed current loop is set to 20.0mA and the direction current loop is set by default to 1.4mA (configurable up to 3.9mA). | Both speed and direction current loops drop to a default value of 1.4mA (configurable up to 3.9mA) |
| Over-speed warning default setting | The separate over-speed warning scheme is off by default in which case an over-speed event is shown by the error flag. The over-speed scheme can be enabled by FT before despatch on request. | The separate over-speed warning scheme is off by default in which case an over-speed event is shown by the error flag. The over-speed scheme can be enabled by FT before despatch on request. | Not applicable |
| FIR Filter length | Default 16 readings -1.6 secs. configurable to 64 readings – 6.4 secs. | Default 16 readings -1.6 secs. configurable to 64 readings – 6.4 secs. | Default 8 readings -1.6 secs. configurable to 64 readings – 12.8 secs. |
| Selective filter scheme | Improved data processing scheme – off by default. Can be enabled on despatch. Contact FT for scheme details | Improved data processing scheme – off by default. Can be enabled on despatch. Contact FT for scheme details | |
| Part numbers | FT742-D-FF, FT742-A-FF, FT742-D-PM, FT742-A-PM, FT742-D-DM, FT742-A-DM, FT742-D-SM | FT722-D-FF, FT722-A-FF, FT722-D-PM, FT722-A-PM | FT702LT-V22-FF, FT702LT/D-V22-FF, FT702LT-V22-PM, FT702LT/D-V22-PM, FT702LT/D50-V22-FF, FT702LT/D50-V22-PM, FT702LT/D60-V22-FF, FT702LT/D60-V22-PM, FT702LT/D70-V22-FF, FT702LT/D70-V22-PM |
