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Operation

MXFS

A05595_02_E00_00

  

HBM: public

39

3.7

Measurement troubleshooting

3.7.1

Dirty connector

It is very important that the connectors are cleaned prior to any connection.
Otherwise, dust and moister can be deposited in the interrogator's optical
adaptors, which will compromise measurements. In 

Fig. 3.20

 a picture of a

magnified connector is presented. The dark gray circle corresponds to the fiber
cladding and the small light gray circle is the core of the fiber. One picture of a
clean connector and one picture of a dirty connector are presented.

Clean connector

Dirty connector

Fig. 3.20

Magnified view of a clean and a dirty connector

The most common effect of dirt on the connections is a large amount of broad
band light being reflected at the connection, in both directions, meaning that
the dynamic range for measurements becomes smaller.

Содержание MXFS

Страница 1: ...User Manual English MXFS QuantumX BraggMETER Module...

Страница 2: ...ss Rua Vasconcelos Costa 277 4470 640 Maia Portugal Tel 351 229 613 010 Fax 351 229 613 020 fibersensing hbkworld com www hbm com fs Mat DVS A05595_02_E00_00 HBM public 05 2021 E Hottinger Baldwin Mes...

Страница 3: ...on 11 2 2 5 Marking of pollutant emission limit values for deliveries to China 11 3 Operation 12 3 1 Connectors 12 3 2 Setting up 13 3 2 1 Power supply 13 3 2 2 Connection to PC or data recorder 14 3...

Страница 4: ...Broken connector 41 4 catman software 42 4 1 Starting a project with MXFS 42 4 1 1 Synchronization 43 4 2 Catman project for MXFS 44 4 2 1 Sample rates 46 4 2 1 1 Acquisition rate 46 4 2 1 2 Sampling...

Страница 5: ...MXFS A05595_02_E00_00 HBM public 5 4 2 5 Zero balance 66 4 2 6 Reset reference wavelength 68 4 3 Reset the device 69...

Страница 6: ...ost suited for monitoring projects or thermal testing of components S High speed mode with 2000 S s sweeping speed most suited for dynamic monitoring or experimental stress analysis Filtering and down...

Страница 7: ...heme and setup To operate the module as stand alone you will need to additionally consider Material Numbers Quantity Description 1 KAB271 3 1 Power cord 1 NTX001 1 Power adapter 1 KAB239 2 1 Ethernet...

Страница 8: ...together with MXFS without any extra cost S Drivers for LabView S Windows device driver for IEEE1394b FireWire 1 4 Synchronization MXFS follows the available synchronization methods of the QuantumX fa...

Страница 9: ...or the environment and human health For more detailed information about disposal of your old appliance please con tact your city office waste disposal service or distributor that purchased the product...

Страница 10: ...e or skin injury during normal operation It is safe under all conditions of normal use No safety requirements are needed to use Class 1 laser devices 2 2 3 General Precautions Considerations Everyone...

Страница 11: ...ion This product carries the CE marking and complies with the applicable inter national requirements for product safety and electromagnetic compatibility according to the following Directives S Low Vo...

Страница 12: ..._02_E00_00 HBM public MXFS 3 Operation 3 1 Connectors Fig 3 1 Front and back view of the MXFS 1 Optical Connectors FC APC 2 Ethernet Connectors 3 STATUS LED 4 Power connector 5 Firewire connectors 6 B...

Страница 13: ...low 18 V the modules will switch off We recommend installing an uninterruptible power supply UPS in vehicles with battery operation between battery and module to compensate for voltage drops during st...

Страница 14: ...ic MXFS NTX001 or KAB271 3 KAB272 FireWire or Fig 3 2 Connecting options for power supply 3 2 2 Connection to PC or data recorder 3 2 2 1 Single Ethernet connection 10 V 30 V DC TCP IP 100 Mbps KAB293...

Страница 15: ...purpose 3 2 2 2 Multiple Ethernet connection with PTP synchronization 10 V 30 V DC Ethernet PTPv2 Switch 10 V 30 V DC Fig 3 4 Multiple connection via Ethernet and synchronization via PTPv2 Modules can...

Страница 16: ...et cable is broken 3 2 2 3 Multiple Ethernet connection and FireWire synchronization Fig 3 5 Example of multiple connection via Ethernet with synchronization The supply voltage for the modules is loop...

Страница 17: ...PC via Ethernet up to 100 m via FireWire electrically up to 5 m optically up to 300 m or via EtherCAT The following must be noted for TCP IP communication via Ethernet S We recommend that you retain t...

Страница 18: ...HCP as well Manual configuration Deactivate DHCP and enter the same subnet mask address as used with your PC Change the IP address of your module so that it permits communication see example below Exa...

Страница 19: ...Manual Configuration Module Settings PC Settings Fig 3 6 Example of settings for a direct connection Ethernet settings adjust the IP address of your PC If you want to operate the modules with a fixed...

Страница 20: ...perties under TCP IP the Alternative Configuration in the TCP IP properties fixed IP address and subnet mask user defined On the control panel choose Network Connections Select the LAN connection The...

Страница 21: ...Operation MXFS A05595_02_E00_00 HBM public 21 Select the Internet Protocol TCP IP and click on the Properties button Fig 3 8 Fig 3 8 TCP IPv4...

Страница 22: ...Operation 22 A05595_02_E00_00 HBM public MXFS Set the IP address and the Subnet mask Fig 3 9 Fig 3 9 IP and Subnet Press OK...

Страница 23: ...he DHCP server requires a certain amount of time to assign an IP address to the QuantumX module After connecting the hardware to the network or PC wait about 30 seconds before starting catman Otherwis...

Страница 24: ...man comes with the firmware included This is usually stored under C Program Files HBM catman Firmware QuantumX B Please refer to the generic Quantum X user manual document A03031 available for downloa...

Страница 25: ...h Flashing orange Download active system is not ready Firmware upgrade Red Error 3 4 Factory reset It is possible to reset the MXFS module to its factory settings which will delete the configuration i...

Страница 26: ...on its front panel see Fig 3 1 The device is ready to receive several Fiber Bragg Grating FBG sensors connected in series on the same optical fiber Temperature Strain Strain Tilt Fig 3 12 Typical sen...

Страница 27: ...00 nm to 1600 nm 2 Measured spectrum of the connected fiber reflection 3 Minimum wavelength in nm 4 Maximum wavelength in nm 5 Reference wavelength in nm value against which relative wavelength measur...

Страница 28: ...3 FBG peak 4 Wavelength value in nm Reference Wavelength The wavelength value to which every measurement is compared to is called the reference wavelength Per each defined channel one reference wave...

Страница 29: ...avelength value of the FBG peak at each acquired sample 3 5 1 4 Power The power value corresponds to the optical power reflected by the fiber Bragg grating at peak wavelength Fig 3 15 Power 1 Power ax...

Страница 30: ...l interrogator is referred as the range of power values in between a fiber Bragg grating can be correctly identified and mea sured Fig 3 16 Dynamic Range 1 Power axis in dBm 2 Wavelength axis in nm 3...

Страница 31: ...tion of the individual measurement of an FBG peak inside each configurable band MXFS considers a fixed threshold value of 3 dB easing the configuration of the device Fig 3 17 Every wavelength value is...

Страница 32: ...either permanently or occasionally that multiple peaks overcome the threshold 4 and SPD eliminates problems on the measurements also for this situation Summarily the increased robustness provided is e...

Страница 33: ...n be scaled to physical values Fig 3 19 Signal 1 Reference wavelength defined for the channel 0 in nm 2 Measured wavelength within the channel in nm 3 Wavelength variation within the channel in nm If...

Страница 34: ...ts S2 S1 and S0 Conver sion formula is a second order poly nomial s2 0 2 s1 0 s0 Acceleration Converted wavelength variation into acceleration based on calibration coefficients S Conversion formula is...

Страница 35: ...age 46 for more details Information Changing speed modes is only possible to perform via catman software 3 6 2 Distance effect For sweeping laser based Optical Interrogators such as the BraggMETER fro...

Страница 36: ...tances increase Absolute wavelength measurement error Wavelength shift caused by acquisition rate and distance is Wavelength shift due to sweeping laser speed d 2 n RepRate FullRange DutyCycle c Where...

Страница 37: ...4 347 6 200 23 2 463 4 500 57 9 1158 5 1000 115 9 2317 0 1500 173 8 3475 5 2000 231 7 4634 1 5000 579 3 11585 1 Tab 3 1 Shift in wavelength pm Distance compensation The distance compensation is advis...

Страница 38: ...speed of light 3 108 m s 100 S s is the sensor wavelength measured at low acquisition speed 100 S s 2000 S s is the sensor wavelength measured at high acquisition speed 2000 S s With the distance rig...

Страница 39: ...magnified connector is presented The dark gray circle corresponds to the fiber cladding and the small light gray circle is the core of the fiber One picture of a clean connector and one picture of a d...

Страница 40: ...or spectrum 4 Dirty connector spectrum 5 Dynamic range reduction To clean an optical interrogator adapter use an appropriate cotton swab there are several cleaning swabs in the market frequently used...

Страница 41: ...nnector It may also occur that the interrogator adapter sleeve breaks In this case when an optical connector is inserted it will not get proper alignment and measurements will be compromised A broken...

Страница 42: ...es one license for catman Easy software which should be used to configure the device MXFS is compatible with catman versions 5 4 1 or above 4 1 Starting a project with MXFS Launch catman software On t...

Страница 43: ...Fig 4 2 Connectivity Start a new measurement project Information MXFS gateway functionality is not supported in catman Please switch it off with MX Assistant before using MXFS with catman 4 1 1 Synch...

Страница 44: ...MXFS 128 Fig 4 3 DAQ channels Channels that have defined bands ranges of wavelength on the device are seen as active and non defined channels are seen as inactive See sec tion 4 2 2 Configuring range...

Страница 45: ...Operation MXFS A05595_02_E00_00 HBM public 45 Fig 4 4 Hiding inactive channels...

Страница 46: ...ferent speed modes that correspond to two sweeping laser speeds which can be set in catman S High Speed mode 2000 S s S Low Speed mode 100 S s Fig 4 5 Acquisition rate Right click over any MXFS channe...

Страница 47: ...rrection when needed 4 2 1 2 Sampling rate and filters Regardless of the acquisition speed down sampling and filtering is available on the module as any other QuantumX module Available sampling rates...

Страница 48: ...500 1000 2000 5 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 10 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 20 0 1 0 2 0 5 1 2 5 10 20 50 100 200 500 1000 2000 50 0 1 0 2 0 5 1 2 5 10 20 50...

Страница 49: ...ly become active after pressing the Apply button If you exit without applying the changes these will not be visible on the device not the channel list Fig 4 7 Ranges configuration window Visualization...

Страница 50: ...k Fig 4 8 Fig 4 8 Update Spectrum Channels on the selected connector can be configured in different ways 4 2 2 1 Automatically define bands for the detected peaks The device can detect peaks on the re...

Страница 51: ...MXFS A05595_02_E00_00 HBM public 51 Fig 4 9 Automatic band definition On the bottom of the window Define band width in nm The band width corresponds to the full wave length range of the channels Pres...

Страница 52: ...ll be highlighted in blue on the table and the band will be highlighted in green on the graph number 1 in Fig 4 11 Writing on the table the minimum band value maximum band value and reference waveleng...

Страница 53: ...e changes performed on the configure ranges interface are initially done only on the software level there is the need to transfer the definitions to the device once ready Press Apply for the changes t...

Страница 54: ...be performed upon a selected channel are Delete By right click and selecting Delete Create or edit By double click on cell to fill in or edit Channel name Band minimum wavelength in nm Band maximum wa...

Страница 55: ...Operation MXFS A05595_02_E00_00 HBM public 55 Fig 4 13 Editing or creating bands When all the desired bands are defined click on Apply button and close the configuration window...

Страница 56: ...device select sensors and select Disconnect and reset sensor Fig 4 14 Disconnect sensors There are different types of sensors that can be configured into the device for more details please refer to s...

Страница 57: ...Operation MXFS A05595_02_E00_00 HBM public 57 4 2 4 Sensors on the software Optical sensors are available on catman database under General Sensors Fig 4 15 Optical sensors on sensors database...

Страница 58: ...the raw value out of MXFS device That means that it is the wavelength variation of the FBG peak in that channel No calculation is performed on the signal as all is processed inside the device see sec...

Страница 59: ...can be defined without or with thermal compensation Strain without compensation Fig 4 17 Strain without compensation The gauge factor k of FBG strain gauges is given in their documentation The refere...

Страница 60: ...me The selected channel for temper ature compensation with this method must be configured as a temperature sensor Fig 4 18 Strain with compensation using a temperature sensor The gauge factor k of FBG...

Страница 61: ...at the zero strain instant and to the temperature measured by the temperature sensor at that same instant These values should be measured after installation They can be filled by hand or automatically...

Страница 62: ...Strain with compensation using compensation FBG This value should be measured after installation It can be filled by hand or automatically defined by an actual measurement using the Measure button Str...

Страница 63: ...calibration sheet They show a polynomial behavior with temperature Fig 4 20 Temperature sensor The Sn coefficients are the values given on the sensors documentation The reference wavelength of the te...

Страница 64: ...Fig 4 21 Acceleration sensor The calibration coefficient S is the value given on the sensors documenta tion The reference wavelength of the FBG acceleration senor 0 should corre spond to the sensor s...

Страница 65: ...ly one FBG Fig 4 22 Generic optical sensor The generic optical sensor computes the measurement as a second order polynomial function a b and c coefficients of the wavelength variation 0 of the FBG The...

Страница 66: ...s project configura tion as an easy way to zero values at the beginning of a measurement for example To zero one or more sensors select the desired lines and press the Zero balance button on the top r...

Страница 67: ...ature for relative mea surements but has to be performed with care in absolute and calibrated mea surements as for example temperature measurements especially if tempera ture values are being used for...

Страница 68: ...t which all wavelength measurements are compared check subsection Reference Wavelength in chapter 3 5 1 3 Wavelength page 28 for more details on the device channel configuration Important While resett...

Страница 69: ...he MXFS interrogator can be reset to its factory settings via catman software Right click over the device name and select Device Reset Fig 4 25 Device reset Select reset options Fig 4 26 Device reset...

Страница 70: ...ands change sensor type to Wavelenght Relative delete zero balance value 2 Reset channel names will change all channel names to its default Device Name _CH_ Connec tor Channel e g MXFS8_CH_2 13 for ch...

Страница 71: ...Operation MXFS A05595_02_E00_00 HBM public 71...

Страница 72: ...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 A05595_02_E00_00 HBM public...

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