HBK FS42PI Operating Manual
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HBK FS42PI Operating Manual

Portable braggmeter
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ENGLISH
Operating Manual
FS42PI
Portable BraggMETER

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  • Page 1 ENGLISH Operating Manual FS42PI Portable BraggMETER...
  • Page 2 Hottinger Brüel & Kjaer GmbH Im Tiefen See 45 64293 Darmstadt Germany Tel. +49 6151 803-0 Fax +49 6151 803-9100 info@hbkworld.com www.hbkworld.com HBK FiberSensing, S.A. Rua Vasconcelos Costa, 277 4470-640 Maia Portugal Tel. +351 229 613 010 Fax +351 229 613 020 info.fs@hbkworld.com www.hbkworld.com Mat.:...

  • Page 3: Table Of Contents

    ............Before using FS42PI - Portable Interrogator PI .
  • Page 4 ............FS42PI...

  • Page 5: General Details

    GENERAL DETAILS General Information The HBK FiberSensing Portable BraggMETER PI is a continuous swept laser scanning interrogator designed to interrogate Fiber Bragg Grating (FBG) sensors. The interrogator includes a NIST traceable wavelength reference that provides continu­ ous calibration to ensure system accuracy over long term operation. The high dynamic range and high output power allows high resolution to be attained even for long fiber leads and lossy connections.

  • Page 6: Before Using Fs42Pi - Portable Interrogator Pi

    Before using FS42PI - Portable Interrogator PI Before using FS42PI Portable Interrogator please read the following warning notes: The FS42PI - Portable Interrogator PI is an acquisition device that operates on batter­ ies. Before removing or changing the battery pack, as well as charging the batteries with a third-party cable, carefully read the user manual for instructions.

  • Page 7: Regulatory And Certification Considerations

    FiberSensing to Amb3E. Laser Safety The FS42PI - Portable BraggMETER PI interrogator contains a laser in its core. A laser is a light source that can be dangerous to people exposed to it. Even low power lasers can be hazardous to a person's eyesight. The coherence and low divergence of laser light means that it can be focused by the eye into an extremely small spot on the retina, resulting in localized burning and permanent damage.

  • Page 8: Symbols

    The optical connectors are subjected to maintenance and/or inspection. Please refer to section 4.3 “Common Measuring Difficulties”, page 30 for maintenance procedure. Do not attempt to open or repair a malfunction interrogator. It must be returned to HBK for repair and calibration. FS42PI...

  • Page 9: Certification

    EMC (Electromagnetic Compatibility Regulation 2016, No. 1091) and ROHS (The Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment Regulation 2012, No. 3032). The corresponding Declaration of Conformity is available upon request. FS42PI REGULATORY AND CERTIFICATION CONSIDERATIONS...

  • Page 10: Marking Used In This Document

    Emphasis Italics are used to emphasize and highlight text and See … identify references to sections, diagrams, or external documents and files. " This marking indicates an action in a procedure. FS42PI REGULATORY AND CERTIFICATION CONSIDERATIONS...

  • Page 11: Operation

    OPERATION Connectors Left view Right view Fig. 3.1 Left and right views from FS42PI The connectors and buttons in Fig. 3.1 are: VGA connector (for connecting an external monitor) LAN connector USB connector (2 x) Air intake fan with filter...

  • Page 12: Power Supply

    5%. Power Supply The interrogator must be used with a dedicated power supply source and not shared with other equipment when powering with a direct source and not with the power adapter. FS42PI OPERATION...

  • Page 13: Switching On

    Press the Exit button (see Fig. 3.3) and confirm the action on the pop-up. Fig. 3.3 Switching off via software " Alternatively, press and release the ON/OFF button (see Fig. 3.4) for a minimum of 200 and a maximum of 1500 miliseconds. A pop-up will appear to con­ firm the action. FS42PI OPERATION...
  • Page 14 If the interrogator is shut down during data recording, unsaved files are saved on the tem­ porary location D:\BraggMONITOR PI Data\temp. Information If the interrogator needs a forced shutdown, press the ON/OFF button continuously until the interrogator powers down. All unsaved data will be lost. FS42PI OPERATION...

  • Page 15: Protection And Carrying Bag

    Place back the handle fixation protection cover Battery Pack The FS42PI Portable BraggMETER is supplied with a replaceable battery pack located in the back panel of the equipment, identified with a blue rectangle in Fig. 3.6. The used bat­ tery pack is a commercially available model (RRC2054-2S) and can be accessed through the back of the interrogator (number in Fig.
  • Page 16 It is advisable to fully recharge and remove the battery pack before periods of inactivity, see chapter 3.7.2 “Removing the Battery Pack”. The Battery Pack warranty period is one year. Follow the guidelines and recommendations in this manual to ensure proper opera­ tion and maximize durability. FS42PI OPERATION...

  • Page 17: Battery Safety Instructions

    Important Take the necessary precautions to avoid Electro Static Discharge (ESD). To change the batteries, proceed as follows: " Shut down the interrogator and wait until the power LED is off. FS42PI OPERATION...
  • Page 18 Unscrew the self-clinching fastner counterclockwise (number in Fig. 3.7). Fig. 3.7 Unscrew the securing pin for cover removal " Lift the cover, tilting over the bottom length as shown on number in Fig. 3.8, and pull it out (number in Fig. 3.8) FS42PI OPERATION...
  • Page 19 Fig. 3.8 Removing the battery cover " Use the Pull-out flap of the battery pack to easily lift it for removal (number Fig. 3.9) Fig. 3.9 Removing the battery pack FS42PI OPERATION...

  • Page 20: Connecting The Battery Pack

    To connect a battery pack, proceed as follows: " Align the Battery Pack in the Back Panel slot, as in Fig. 3.10. Fig. 3.10 Aligning the battery pack " Ensure the pull-out flap is below the lock holder, to give access to the securing pin. FS42PI OPERATION...
  • Page 21 Reinsert the lid by sliding it to the bottom (number in Fig. 3.12), press it down to place (number in Fig. 3.12), and secure it by screwing the locking pin (number Fig. 3.12). Fig. 3.12 Closing the battery pack lid FS42PI OPERATION...

  • Page 22: Touch Screen Calibration

    Touch Screen Calibration If a cover is applied to the FS42PI touch screen, it might be necessary to repeat the cali­ bration of the touch screen by following the next procedure: " Go to Windows start menu in Fig. 3.13) and under eGalaxy Touch folder, press Con­...

  • Page 23: Active Cooling System

    When it is visibly dirty it is advisable that it is cleaned or replaced. Dirty filters compromise ventilation/cooling of the device that can lead to malfunction or damage the equipment. Notice Overheat of the device can permanently damage the equipment. FS42PI OPERATION...

  • Page 24: Cleaning The Filter

    Reapply the filter fixing the four screws. 3.9.2 Replacing the Filter On case the filter is damaged or cannot be conveniently cleaned it should be replaced. There is one extra fan filter delivered with the device that can be used for replacement.. FS42PI OPERATION...

  • Page 25: Optical Connectors Detachable Panel

    To detach the panel, unscrew the four screws (number in Fig. 3.17) and gently pull the panel out (number in Fig. 3.17). Be aware that fragile optical cables might follow and these cannot be forced as they might break. FS42PI OPERATION...
  • Page 26 Disconnect the connector(s) from the adapter(s). " Remove the adapter from the panel FC/APC adapter: unscrew the nut and remove SC/APC adapter: unscrew the screws and remove " Apply the new adapter. " Align the panel and screw the screws back. FS42PI OPERATION...

  • Page 27: Measuring

    Bragg grating sensors interrogated at the same time. HBK FiberSensing recommends a maximum of 18 newLight standard sensors per optical channel (e.g. 9 strain and 9 temperature stan­...

  • Page 28: Definitions

    The following definitions are applicable to this equipment. 4.2.1 Wavelength The Wavelength value corresponds to the wavelength at the peak of the fiber Bragg grat­ ing reflection spectrum, commonly referred as Bragg wavelength (Fig. 4.2). FBG reflection spectrum Wavelength Wavelength in nm Fig. 4.2 Wavelength FS42PI MEASURING...

  • Page 29: Power

    In cases where low and high reflectivity FBGs coexist, signal losses are often a problem. SPD therefore improves the stability and accuracy of the measurements, contributing to the system’s efficiency. FS42PI MEASURING...

  • Page 30: Common Measuring Difficulties

    One picture for a clean connector and one picture for a dirty connector are pre­ sented. Clean connector Dirty connector Fig. 4.5 Dirty connector FS42PI MEASURING...
  • Page 31 Signal reduction due to dirt on connector To clean an optical interrogator adapter, use an appropriate cleaner (1-FS-CLEANER from HBK or similar). Insert it in the optical adapter, as in Fig. 4.7, and rotate always in the same direction. FS42PI...

  • Page 32: Broken Connector

    It may also occur that the interrogator adapter ferrule breaks. In this case, when an opti­ cal connector is inserted it does not get proper alignment and measurements are com­ promised. A broken ferrule will look as shown in Fig. 4.8. Fig. 4.8 Broken ferrule on the adapter FS42PI MEASURING...

  • Page 33: Reflective Fiber Ending

    To solve this problem you should proceed as explained in chapter 3.10.1 “Adapter Replacement on page 25” or contact HBK FiberSensing. 4.3.3 Reflective Fiber Ending Even when all connections have been performed correctly, it may occur that the interroga­ tor does not find any sensor on the array. One of the reasons may be the excess of reflected light saturating the detectors.
  • Page 34 Fiber cut Continous Fiber Initial Wavelength in nm Broken and Missaligned Fiber Broken Fiber Wavelength in nm Broken but Aligned Fiber Fabry-Pérot Fig. 4.10 Signal behavior due to a broken fiber FS42PI MEASURING...

  • Page 35: Operating System

    OPERATING SYSTEM The FS42PI operating system is Windows 10 IoT and the software included is BraggMONITOR PI. Through this combination the customer can use the Windows 10 IoT features and can access to the BraggMONITOR PI software directly to configure the mea­...

  • Page 36: Remote Operation

    REMOTE OPERATION The FS42PI device can be operated remotely via Ethernet. To operate the device you must ensure: that the interrogator is powered on; that the PC you are using is on the same subnet; that the acquisition on the device is stopped.

  • Page 37: Exiting Remote Mode

    (see Fig. 7.1 on chapter 7.2.1 “General and Management Controls”). Communication Protocol Syntax 6.3.1 Command Syntax Each command is an ASCII string with arguments separated by “:” and terminated with the “Line Feed” and “Cariage Return” characters (“End of Line”). FS42PI REMOTE OPERATION...
  • Page 38 Fig. 6.2 TCP communication scheme. Commands for the FS42PI are sent by port 3500. All commands, except for Continuous Acquisition (see chapter 6.3.5.2 on page 42), are received via the same port. Continuous Acquisition answers are retrieved via port 3365.

  • Page 39: Common Commands

    The defined value for the parameter that is being configured with the command is out­ side the possible interval. :NACK:REMOTE MODE NOT POSSIBLE The FS42PI device is running and acquiring. Locally stop acquisition and resend com­ mand. 6.3.2 Common Commands :IDENtification? Queries the instrument type and firmware revision.

  • Page 40: Status Commands

    Acquires the optical spectrum trace of the fiber Bragg grating sensors in the C con­ nector of the FS42PI. Returns the optical spectrum trace over the complete wave­ length between 1500 nm to 1600 nm with a 5 pm sampling resolution.
  • Page 41 :ACQU:WAVE:CHAN:1? Answer :ACK:1523.6573, 1554.0709, 1566.7846 :ACQUisition:ENGIneering:CHANnel:C? Acquires the engineering values, according to the range formula (FML), in the C con­ nector of the FS42PI. Returned value is always in accordance to the defined threshold for the connector. Example: Command :ACQU:OSAT:CHAN:1? Answer :ACK:30.45,25.85,0.2582,3.2154...

  • Page 42: Continuous Acquisition

    Continuously acquires the peak wavelengths of the fiber Bragg grating sensors in all channels of the FS42PI. This command is sent via port 3500 and corresponding data is received through port 3365. The answer is a string starting with the timestamp with the format «YYYY.MM.DD:hh:mm:ss»...
  • Page 43 “,”, from all channels separated by “:”. Note: If there are no sensors detected within a defined range the interrogator returns -998. Example: Command :ACQU:ENGI:CONT:STAR Answer Port 3500 » :ACK Port 3365 » :2019.07.07:16:04:52: 1523.6573, -998, 1566.7846:: 1567.6987, 1584.9825: 1534.9824 FS42PI REMOTE OPERATION...

  • Page 44: Braggmonitor Pi Software

    Please contact HBK FiberSensing for assistance. Information To proceed with the update the FS42PI device must be connected to the internet via LAN. You'll need to inform the device's serial number which can be found on the label glued on the backpanel.

  • Page 45: Graphical User Interface

    Measuring… When in continuous acquisition Saving data… When data is being saved Scanning… When the auto scan process is ongoing Testing… When the testing button on the configuration tab is pressed down. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 46 (see Fig. 7.2). Recorded dataset can also be disregarded by pressing the Discard button. Fig. 7.2 Dataset name Explorer: Opens an Windows Explorer window, for easy access to saved files or other resources (see Fig. 7.3). FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 47 Fig. 7.3 Windows Explorer window Info: displays general information on the device (see Fig. 7.4) including the access to this user manual (by pressing button number on Fig. 7.4). FS42PI BRAGGMONITOR PI SOFTWARE...

  • Page 48: Graphical Area

    Interrogator Model Interrogator SW version Interrogator SW release date Interrogator Serial Number IP address and subnet mask HBK FS contact information Button to call out user manual Exit: Exits the application. 7.2.2 Graphical Area The graphical area is divided into four different tabs:...

  • Page 49: Spectrum

    Fig. 7.5) by selection from the dropdown list. References can be saved by pressing the Add Ref button (number in Fig. 7.5) Configuration information. On this table, information on the detected peaks and defined detection ranges (channels) are presented. Autoscan tool area FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 50 Fig. 7.7). The used threshold for autoscan can be higher than the measurement threshold to support on the correct identification of peaks at a first trial because it eliminates the identification of side lobes as sensors. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 51 (Fig. 7.8) and the normalized threshold value is converted to match Optical Power units regarding maximum peak acquired value. The label on the button will change to match the alternative option, linear or logarithmic. Zoom Fit button FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 52 Add Ref button. Saves the current spectrum for representation as a reference trace on the spectrum area together with the current measured spectrum. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 53 Manage Ref button. Opens the list of previously saved references (Fig. 7.10). Fig. 7.10 Reference manager FS42PI BRAGGMONITOR PI SOFTWARE...

  • Page 54: Configuration

    - Upon the auto scan, the populated list is organized in ascending order of refer­ ence wavelengths. If a configuration is created by hand, edited by hand, or uploaded the list will reorganize itself to meet the reference wavelength order. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 55 Save Configuration (Save Cfg): Saves the configuration on the database. Configura­ tion files are compatible with the FS42PI and BraggMONITOR PI only. Zero: Applies an offset to “zero” the selected sensors. This means that the device performs a scan and updates the reference wavelength of the selected sensors to the current wavelength value.

  • Page 56: Acquisition

    This is the area for defining the graphical representation of the data that is being acquired. Plot selection is performed on the right side with dropdown list of configured sensors (the list is shown by clicking over the sensor's name) FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 57 1≤ Second < 60 1≤ Minute < 60 1≤ Hour ≤ 10 Vertical Fit. Fits the shown data on the amplitude axis. Clear. Clears the graph area. Values/Legend Button. The user can switch between two different views: FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 58 Graph legend vs graph values Legend View in Fig. 7.14): shows the name, the assigned color and selection of the configured sensors. Values View in Fig. 7.14): shows the name and current values of the configured sensors. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 59 On this tab, the measured values, while acquiring, are represented in front of the name of the sensor. By clicking on a cell with a value (either sensor name or measurement value), a pop up with full information on that sensor is shown. FS42PI BRAGGMONITOR PI SOFTWARE...

  • Page 60: Data

    Data Graph: Shows previously saved data on a time graph. Dataset selection: Opens the dropdown with the list of previously saved datasets for selection. Zoom Fit: Fits all data on the graph. Manage data: Opens a dialog for managing previously saved datasets. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 61 Export: Exports the dataset in ".txt" format. Datasets are divided into ".txt" files of 30 min of data to prevent the handling of heavy files. Rename: Renames the selected dataset. Delete: Deletes the selected dataset(s) Back: Returns without performing changes. FS42PI BRAGGMONITOR PI SOFTWARE...
  • Page 62 HBK - Hottinger Brüel & Kjaer www.hbkworld.com info@hbkworld.com...

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