ROCTEST FOS Series Manual Download Page 1

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NSTRUCTION

ANUAL

SENSOPTIC FIBER-OPTIC SENSORS

FABRY PEROT STRAIN GAUGE

FOS Series



This product should be installed and operated only by qualified personnel. Its misuse is potentially dangerous. The Company makes no

warranty as to the information furnished in this manual and assumes no liability for damages resulting from the installation or use of this

product. The information herein is subject to change without notification.

Tel.: 1.45

0.465.1113 • 1.877.ROCTEST (Canada, USA) • 33.1.64.06.40.80 (France) • 41.91.610.1800 (Switzerland)

www.roctest.com

E10190-000816

Summary of Contents for FOS Series

Page 1: ...el Its misuse is potentially dangerous The Company makes no warranty as to the information furnished in this manual and assumes no liability for damages resulting from the installation or use of this...

Page 2: ...1 Gauge installation 4 2 1 1 Metal surface preparation 5 2 1 2 Bonding method 6 2 1 3 Rebar installation 11 2 1 4 Installation of sensors with composite laminates on concrete structures 11 2 2 Mating...

Page 3: ...ight interferometric extrinsic principle that uses a common multimode fiber The patented principle consists in assessing the length of a Fabry Perot cavity contained in the strain gauge by means of a...

Page 4: ...E10190 000816 FOS Page 2 Figure 1 Fabry Perot strain gauge schematic principle...

Page 5: ...ale Precision Range dependent Transverse sensitivity 0 1 of full scale Response time Readout unit data logger dependent Operating temperature Minus 55 C to 350 C operating temperature is fiber optic c...

Page 6: ...rm and 260 C long term is recommended Mixing instructions and adhesive characteristics are given by the adhesive manufacturer Slowly mixing the resin and hardener is recommended to prevent excessive a...

Page 7: ...r rough or coarse surfaces a grinder or file can be used to start abrading Apply M Prep Conditioner A or the equivalent compound and wet abrade the gauge area Keep the surface wet while abrading Remov...

Page 8: ...ro Measurements to the gauge area Keeping the surface wet scrub with cotton tipped applicators Do not allow evaporation of the cleaning material since this would leave a thin unwanted film between the...

Page 9: ...auge on the surface and tack the tape to maintain proper alignment The sensitive area is collinear to the axis of the fiber The location of the sensitive area of the gauge is shown on the box cover th...

Page 10: ...wing the mixing instructions of the adhesive manufacturer Slowly mix the resin and hardener to prevent excessive amount of air bubbles using a clean stick or brush and apply the adhesive slowly with a...

Page 11: ...is tape is removed after curing Follow the recommended cure schedule given by the adhesive manufacturer Note that the residual compression strain may increase with increasing curing temperature Post c...

Page 12: ...and butyl rubber sheets can be used The area to be covered by the protective coating is illustrated below When applying the coating onto the surface of the installation be careful to use a light amou...

Page 13: ...installation can be done according to the following steps 1 Surface preparation 2 Primer application 3 Putty application 4 Epoxy application 5 CFRP GFRP bottom sheets installation 6 Epoxy application...

Page 14: ...internal angles than for flat surface 5 CFRP GFRP bottom sheets installation When handling of CFRP GFRP sheets wear a pair of protective goggles and gloves Immediately after epoxy application install...

Page 15: ...oating of epoxy of approximately 200 300 g m2 Follow instructions above 9 Curing Let cure The work site must be protected from rain dust sand etc 2 2 MATING GAUGES TO THE READOUT UNIT Before installin...

Page 16: ...gage L L L L L 1 where cavity L Length of the Fabry Perot cavity in nanometers varies between 8 000 and 23 000 nm gage L Gauge length space between the fused weldings in millimeters 0 L Initial length...

Page 17: ...ature reading of structure in C T0 Initial temperature reading of structure in C Expansion factor of structure in m m C on which the gauge is fixed generally in the range of 10 m m C 16 m m C for stee...

Page 18: ...ers Liters Cubic inches Cubic feet U S gallon Can Br gallon 0 06101 35 3357 0 26420 0 21997 MASS Kilograms Kilograms Kilograms Pounds Short tons Long tons 2 20459 0 00110 0 00098 FORCE Newtons Newtons...