HBM FS65, Installation Manual

Page 1: ...Installation Guide English FS65 Accelerometer ...

Page 2: ...oncelos Costa 277 4470 640 Maia Portugal Tel 351 229 613 010 Fax 351 229 613 020 fibersensing hbm com www hbm com fs Mat 7 2002 4265 DVS A4265 2 3 HBM public 05 2015 Sensor Design Version v1 0 E Hottinger Baldwin Messtechnik GmbH Subject to modifications All product descriptions are for general information only They are not to be understood as a guarantee of quality or durability ...

Page 3: ...8 2 1 Accelerometer 8 2 1 1 List of Materials 8 2 1 2 Placing the Sensor 9 2 1 3 Fixing the Sensor 10 2 1 4 Protecting the Sensor 10 2 2 Bi or Triaxial Accelerometer 11 2 2 1 List of Materials 11 2 2 2 Assembling the Sensors 12 2 2 3 Fixing the Assembly 20 2 2 4 Protecting the Sensors 20 3 Sensor Configuration 22 3 1 Sensor Calibration Sheet 22 3 1 1 General nformation 23 3 1 2 Calibration Data 23...

Page 4: ...FS65 Accelerometer Outdoor NC 1 1 1 Overview The FS65 Accelerometer is a Fiber Bragg Grating FBG based sensor suitable for a large range of appli cations where low frequency and small amplitude vibra tions are present 1 1 2 Characteristics Robustness Long term reliability ensured by innovative sensor design careful selection of materials and IP68 packag ing Completely passive Inherent immunity to ...

Page 5: ...sev eral kilometers Compatible with most interrogators Provided with calibration sheet allowing easy and accu rate configuration Self referenced Based on the measurement of an absolute parameter the Bragg wavelength independent of power fluctua tions 1 1 3 Applications HBM FiberSensing accelerometer can be used in a large range of monitoring applications including measuring ambient induced vibrati...

Page 6: ...O 9001 2008 certified com pany 1 1 5 Accessories The implementation of complex sensing networks in large structures is made simpler with HBM FiberSensing accessories These include cables especially designed to resist harsh environments as in civil engineering not only during construction but also during the lifetime of the structure humidity corrosion etc HBM FiberSensing also provides accessories...

Page 7: ...verse sensitivity 0 1 Optical Central wavelength 1500 to 1600 nm Spectral width FWHM 0 2 nm Reflectivity 65 Side lobe suppression 10 dB Inputs Outputs Cable type Ø 3 mm outdoor armor Cable length 2 m each side 5 cm Connectors FC APC SC APC NC No Connectors Environmental Operation temperature 20 to 80 ºC Protection class IP68 Mechanical Materials Aluminum Dimensions 73 x Ø 53 mm Weight 250 g 1 Typi...

Page 8: ...he needed tools to install the FS65 Accelerometer depend on the structure the sensor is to be installed on In many cases mounting parts may need to be designed in order to adapt the sensor to the spot where it is going to be installed The installation solution should be carefully designed in order to meet the sensor measuring direction and the structure characteristics ...

Page 9: ... down or towards the side Fig 2 1 ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÓÓÓÓ ÔÔÔÔÔÔÔÔÔÔÔÔÔ ÔÔÔÔÔÔÔÔÔÔÔÔÔ ÔÔÔÔÔÔÔÔÔÔÔÔÔ ÔÔÔÔÔÔÔÔÔÔÔÔÔ ÔÔÔÔÔÔÔÔÔÔÔÔÔ Fig 2 1 Information This will only alter the sensor s DC output Dynamically it will still have the same behavior Its position must be set according to its measuring direc tion ...

Page 10: ...Fig 2 2 2 1 3 Fixing the Sensor The Accelerometer has a M5 hole on its basis to be screwed to the surface 2 1 4 Protecting the Sensor Accelerometer is IP68 rated meaning that no protection is needed Nevertheless it can be protected with a box or other protection methods ...

Page 11: ...S Protection Cover optional 1x Cover 8x M6x20 List of Needed Equipment The needed tools to install the FS65 Accelerometer depend on the structure the sensor will be installed In many cases mounting parts may need to be designed in order to adapt the sensor to the spot where it is going to be installed The installation solution should be carefully designed in order to meet the sensor measuring dire...

Page 12: ... is assembled on a mounting base using two or three accelerometers Its position must be set according to its measuring direc tion On Fig 2 3 an example of the possible two measur ing directions is presented and on Fig 2 4 a Triaxial assembly is presented measuring directions Fig 2 3 measuring directions Fig 2 4 ...

Page 13: ...Mechanical parts of the mounting plate are delivered separately Start by screwing the position block to the mounting plate using 3 of the provided M5x12 screws These screws should be threaded from the backside as shown on Fig 2 5 Mountingplate M5x12 Fig 2 5 Position block Fig 2 6 ...

Page 14: ...l axis use the provided M5x8 screws to fix the accelerometer to the positioning block Ensure that the fibers are oriented at approximately 30º with the fibers that will be exiting the protection cover at the lower position see Fig 2 7 and Fig 2 8 M5x8 Fig 2 7 Approx 30 Fig 2 8 Fig 2 9 ...

Page 15: ...or Installation FS65 A4265 2 3 HBM public 15 For the vertical axis sensor use the remaining M5x12 screw Place the vertical sensor with the fibers oriented at 45º Fig 2 12 M5x12 Fig 2 10 Fig 2 11 45 Fig 2 12 ...

Page 16: ...Cable Guides Fig 2 13 and M3x6 screws to place and fix the cable guides on the mounting plate Fig 2 14 Cable Guide M3x6 Fig 2 13 Fig 2 14 Considering the triaxial configuration and the defined directions as represented on Fig 2 15 sensor connec tion should be performed as on Fig 2 16 ...

Page 17: ... 2 15 A B A B A B Sensor x Sensor y Sensor z Fig 2 16 Standard Accelerometers are delivered with 2 m length cables on each side This is not an optimized length for the Bi or Triaxial configuration but connections can be performed Fig 2 17 shows an assembly of sensors with ...

Page 18: ...h an optimized cable length is presented Fig 2 17 Fig 2 18 Start by taking the cable B Fig 2 15 of the sensor on the x axis and place it around the assembly as on Fig 2 19 Then take cable A of the sensor on the z axis and place it around the assembly as on Fig 2 20 Use an Optical Adapter and attach both connectors ...

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Page 20: ...e Sensors Although the accelerometer is IP68 rated the performed connections on the assembly are not This means that for outdoor usage of the assembly arranged as above should have the connectors protected against moisture and dust HBM FiberSensing suggests the use of a vul canizing tape around the connectors and adapter Fig 2 23 Fig 2 23 For mechanical protection and external cover of the Bi or T...

Page 21: ...Sensor Installation FS65 A4265 2 3 HBM public 21 Fig 2 24 ...

Page 22: ...n 22 A4265 2 3 HBM public FS65 3 Sensor Configuration 3 1 Sensor Calibration Sheet Every HBM FiberSensing sensor is provided with a cali bration sheet The layout of this document is the same for all accelerometers Fig 3 1 ...

Page 23: ...table number 2 in Fig 3 1 These values should be used for acceleration computation 3 1 3 Acceleration Computation Number 3 in Fig 3 1 exemplifies the calculations that should be performed for wavelength measurement to acceleration conversion The acceleration variation of an Accelerometer under a reference frequency is given by the quotient of wavelength shift from the zero moment by the sensor s s...

Page 24: ...www hbm com HBM Test and Measurement Tel 49 6151 803 0 Fax 49 6151 803 9100 info hbm com measure and predict with confidence A4265 2 3 7 2002 4265 HBM public ...