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Section 3

Installation

16

FT702LT/D Flat Front Wind Sensor Manual

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

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Содержание FT702LT/D

Страница 1: ...SUNBURY ON THAMES MIDDLESEX TW16 7DX TEL 44 0 20 8943 0801 FAX 44 0 20 8943 3283 WEB www fttechnologies com E MAIL info fttechnologies com A4239 6 EN July 2017 The FT and Acu Res logos are registered...

Страница 2: ...1 1 Connector Details 14 3 1 2 Cable Details 14 3 2 Mounting the FT702LT D 15 3 2 1 Alignment 16 3 3 Lightning protection and EMC 17 4 3 1 Protection against direct lightning effects 17 4 3 2 Protecti...

Страница 3: ...not be disposed of in general waste or landfill limination du produit Conform ment la directive europ enne 2012 19 EU relative aux d chets d quipements lectriques et lectroniques DEEE ces composants d...

Страница 4: ...andards the equipment must be o Connected to an appropriately approved isolated power supply for example UL CSA IEC 60950 1 2005 A1 2009 A2 2013 rated 20 30VDC and be current limited 6A Max o Protecte...

Страница 5: ...Connect une alimentation agr e convenablement isol e par exemple UL CSA IEC 60950 1 2005 A1 2009 A2 2013 de tension nominale 20 30 VCC et avec courant limit 6 A max o Prot g par des dispositifs de pro...

Страница 6: ...ps reduce costly down time and unscheduled maintenance visits Mounting and aligning the sensor is very straightforward The mounting flat on the sensor body defines the 0 O wind datum so that the senso...

Страница 7: ...re 2 Examples of Main Sensor Labels Only sensors marked with the Intertek label conform to UL 61010 1 and are certified to CAN CSAC22 2 No 61010 1 04 Some early build versions do not have this certifi...

Страница 8: ...in this manual for any particular design application The Purchaser should independently undertake sufficient testing to confirm validity and suitability of any design The Purchaser assumes all risks...

Страница 9: ...rements4 Supply Voltage 20V to 30V DC 24V DC nominal Supply Current Heater off 30mA Supply Current Heater on 6A max The heater is thermostatically controlled Heater power consumption will depend on th...

Страница 10: ...ould always be used for any calculations or control decisions because single readings can accidentally become corrupted see section 2 2 5 The sensor has its own internal filtering enabled by default w...

Страница 11: ...ed The C Code number then indicates the type of calibration applied 2 examples are shown in Figure 6 V20 Standard 0 50m s 4 20mA Default V22 All other calibrations The wind speed scaling reference is...

Страница 12: ...t the datum direction The output options are shown in Figure 8 Figure 7 Visualisation of direction with 4mA and 12mA current offsets Figure 8 Comparison of wind direction current offsets When operatin...

Страница 13: ...sed to prevent icing up of the sensor in freezing temperatures The heater is controlled automatically by the FT702LT D using a user programmable set point temperature The FT702LT D uses a control sche...

Страница 14: ...scription Manufacturers Part Number FT Sensor Type Maximum Outer Cable Diameter Manufacturer FT702LT D Cable Side Connector 8 way plug SS104Z129 1 FT702LT D Analogue Option 8 0mm W W Fischer FT702LT D...

Страница 15: ...y to the sensor s mounting flat whilst avoiding the fixing hole Use of an electrical joint compound will also help to maintain long term low impedance connection to ground This connection should be ch...

Страница 16: ...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 meas...

Страница 17: ...the sensor so that its body can never be subjected to a direct lightning strike Figure 15 Direct lightning strike Figure 16 Indirect lightning strike This level of protection is achievable through the...

Страница 18: ...galvanised steel or aluminium in order to prevent corrosion This will ensure a long term low impedance connection to ground Figure 17 Ring and Rod interceptors The standards for Lightning Protection...

Страница 19: ...ny metal conduit used must also be continuous and terminated at both ends with appropriate fittings Figure 18 below shows the principle of the protection scheme Preferably this connection is establish...

Страница 20: ...es and the chassis The four current loop signals are isolated from the power supply lines and the chassis An example of SPD suitable for this protection can be sourced from Phoenix Contact as shown in...

Страница 21: ...he mounting screw nut and washer are in good condition with no signs of corrosion and tighten as necessary If corrosion is present replace with parts of the appropriate finish see section 3 2 Intercon...

Страница 22: ...damage may result and product warranties will be invalidated If there are no signs of physical damage or problems with communication but sensor downtime or incorrect readings have been intermittently...

Страница 23: ...wires allowing the current loops to be measured with a multimeter or oscilloscope See Figure 21 The pack also includes the FT702LT D Set Up and Test Program for changing a sensor s settings see secti...

Страница 24: ...utput to the 24 VDC terminal on the power supply 4 Connect the green wire wind speed 4 20mA output to an ammeter and then connect the other terminal on the ammeter to the 0V terminal on the DC power s...

Страница 25: ...0 Figure 22 FT702LT D Configurable Settings Notes Set Point above 440 C only available from build version 22 Setting only adjustable from build version 22 Greater than 4A only available from build ver...

Страница 26: ...t any new settings required on the right and then click on the Update Settings button to apply them The new sensor settings will then be displayed on the left Clicking on the Factory Defaults button w...

Страница 27: ...the top of the application 5 5 Current Loop Test Both current loop outputs can be automatically stepped through the 4 20mA range for test purposes When the loop test command is sent both loops are set...

Страница 28: ...ck that the sensor is working but before unplugging the sensor the Disconnect button must always be pressed first The current loops state will then change to be re enabled as indicated at the top of t...

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