Table of Contents
Advertisement
Quick Links
FT742 - Analogue (4-20mA) Wind Sensor Manual
Direct-Mount 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
A4277-3-EN
November 2017
The FT and Acu-Res logos are registered trademarks of FT Technologies Ltd.
Copyright © 2017 FT Technologies Ltd. All rights reserved.
FT742 (4-20mA) – DM Sensors - User Manual
1
Advertisement
Table of Contents
Related Manuals for FT Technologies FT742
Summary of Contents for FT Technologies FT742
- Page 1 WEB: www.fttechnologies.com SUNBURY-ON-THAMES E-MAIL: info@fttechnologies.com MIDDLESEX TW16 7DX A4277-3-EN November 2017 The FT and Acu-Res logos are registered trademarks of FT Technologies Ltd. Copyright © 2017 FT Technologies Ltd. All rights reserved. FT742 (4-20mA) – DM Sensors - User Manual...
-
Page 2: Table Of Contents
Lightning, Surge & EMI Protection ..............22 SERVICE, CONFIGURATION & TESTING ..........24 Inspection ......................24 Fault Finding & Troubleshooting ................ 25 Returns ........................26 The Acu Test Evaluation PC Software ............... 27 FT742 (4-20mA) – DM Sensors - User Manual... - Page 3 Déclaration de conformité CE de la with the essential requirements of the compatibilité électromagnétique (EMC) following applicable Directive et marquage CE conformément à la 2014/30/EU, and carries the CE Marking directive CE 2014/30/EU. accordingly. FT742 (4-20mA) – DM Sensors - User Manual...
-
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 provides • To ensure that the product remains compliant with the electrical safety requirements of the UL / CSA 61010-1 Standards it must be;... -
Page 5: Consignes De Sécurité
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 :... -
Page 6: Introduction
FT sensors are configurable and can be factory programmed to the required customer settings, contact FT Technologies for further details. Note: The FT742-DM range is not suitable for turbine control applications. The FT742-FF and FT742-PM ranges are designed for this application. -
Page 7: Disclaimer
The Purchaser assumes all risks and liability in conjunction with the use of the information given. Any warranty given by FT Technologies in respect of the equipment is conditional upon the sensor being handled, installed, integrated and operated in accordance within the guidelines given in this manual. -
Page 8: Functional Description
4. The heater set point and current limit can be pre-configured in the factory or adjusted using the FT Acu-Test Analogue kit. 5. See safety instruction requirements (pages 4 and 5). FT742-DM (4-20mA) – Sensors - User Manual... -
Page 9: Current Loops
By default this feature averages the last 16 readings (1.6s), this can be factory configured to values 0.1-6.4s in 0.1s increments. It is possible to disable the internal filter (but not recommended) via the Acu-Test Analogue test software. Contact FT technologies for further details. Selective Filter In addition to the averaging filter described above, the sensor has an optional feature called the Selective Filter that may improve data quality. -
Page 10: Wind Direction Loop
The default current loop output when the wind is blowing towards the 0° datum direction is 12mA. If required, the direction loop can be set to give an output of 4mA at the datum direction. The output options are shown in Figure 5. FT742-DM (4-20mA) – Sensors - User Manual... -
Page 11: Changing The Wind Datum Direction
The datum direction can be electronically rotated (either clockwise or counter clockwise) in 1° increments using the Acu Vis Analogue software (see Section 4.4) to apply this adjustment. Once the datum offset has been set it will be retained in the sensor’s Flash memory. FT742-DM (4-20mA) – Sensors - User Manual... -
Page 12: Error Conditions
This is to match the legacy behaviour of the FT702LT/D sensor. An additional feature is included in the FT742 sensor called the Overspeed Warning Scheme (disabled by default). This scheme can be used to distinguish between overspeed events and other invalid readings. When enabled and during overspeed events, the scheme works in the following way: 1. -
Page 13: Heater Operation
12-30VDC. By default, the heater will shut down at approximately 11VDC. Below approximately 8V the sensor may shut down. Lower voltages reduce the overall power consumption and heater performance. For further advice on power and heater management strategies, contact FT Technologies. FT742-DM (4-20mA) – Sensors - User Manual... -
Page 14: Mechanical & Electrical Installation
This section is for guidance only. It is the responsibility of the designer and installer to ensure that the installation and its design are safe and fit for purpose. Please see disclaimer Section 1.4. FT742-DM (4-20mA) – Sensors - User Manual... - Page 15 The following replacement parts are available: FT027 O-ring (3.53 CS x 32.92 ID) Size Adaptor 25mm (1”) for FT742-DM (includes a FT033 tapered pipe insert & 4x FT034 FT031 self-locking fasteners) Size Adaptor 50mm (2”) for FT742-DM (includes a FT033 tapered pipe insert & 4x FT034...
- Page 16 Chapter 3 – Mechanical & Electrical Installation FT742-DM (4-20mA) – Sensors - User Manual...
- Page 17 Chapter 3 – Mechanical & Electrical Installation Figure 9: Direct-Mount Wind Sensor (mm) FT742-DM (4-20mA) – Sensors - User Manual...
- Page 18 The sensor measures the wind direction relative to the central datum feature. When the wind sensor is correctly aligned the wind direction measurements will be as shown in Figure 10. Figure 10: Wind Direction (view from above) FT742-DM (4-20mA) – Sensors - User Manual...
- Page 19 25mm (FT031) and 50mm (FT032). Ensure the internal diameter allows the interface cable to pass through. Pipe Insert (FT033) 25mm size adaptor (FT031) 50mm size adaptor (FT032) Figure 11: Direct-Mount Sensor Pipe Installation – Including tapered pipe insert and size adaptors FT742-DM (4-20mA) – Sensors - User Manual...
- Page 20 Chapter 3 – Mechanical & Electrical Installation Figure 12: Direct-Mount Compass Alignment FT742-DM (4-20mA) – Sensors - User Manual...
-
Page 21: Connector Details
In an area with a moderate or severe lightning strike exposure the cable shield may not provide sufficient protection. In this case the cable will require further shielding such as being enclosed in a metal pipe or conduit FT742-DM (4-20mA) – Sensors - User Manual... -
Page 22: Lightning, Surge & Emi Protection
3.3 Lightning, Surge & EMI Protection The FT742-DM is specifically designed for meteorological use. When installing the sensor, it is essential to do so in a way that protects the sensor in the event of a lightning strike (if the site is deemed to be at risk). Since peak current levels during a lightning strike can be in the order of 200kA, applying the correct grounding technique is critical to ensuring current is diverted to ground in a controlled manner. - Page 23 Pipe-Mount (PM) range of sensors. In such applications, a different grounding method should be employed and the Pipe Mount variant is a more suitable solution. Please contact FT Technologies for further information. FT742-DM (4-20mA) – Sensors - User Manual...
-
Page 24: Service, Configuration & Testing
Intermittent cable faults may not be visible, but may show up as errors in data. See Section 2.2.6 for details on how to identify such faults. Confirm the intended network component values. FT742-DM (4-20mA) – Sensors - User Manual... -
Page 25: Fault Finding & Troubleshooting
The following replacement parts are available: FT027 O-ring (3.53 CS x 32.92 ID) Size Adaptor 25mm (1”) for FT742-DM (includes a FT033 tapered pipe insert & 4x FT034 FT031 self-locking fasteners) Size Adaptor 50mm (2”) for FT742-DM (includes a FT033 tapered pipe insert & 4x FT034... -
Page 26: Returns
Please contact FT Technologies for further information and advice if required. 4.3 Returns If a sensor appears to be faulty, compile a detailed fault description, then contact FT Technologies to 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 27: The Acu Test Evaluation Pc Software
4.4 The Acu Test Evaluation PC Software To help users carry out a test bench assessment of the sensors, FT Technologies sells an Acu-Test Evaluation Pack. The Evaluation Pack includes the FT055 cable to connect the sensor to an external power supply. The cable is also fitted with a USB connector to connect the sensor directly to a PC so that its settings can be checked and configured. - Page 28 Warning: Live connection/disconnection of the power and/or sensors during live operation, or miswiring of the power leads could damage the equipment and is not covered by FT’s standard warranty terms. End of Manual – Back to Contents FT742-DM (4-20mA) – Sensors - User Manual...
Need help?
Do you have a question about the FT742 and is the answer not in the manual?
Questions and answers