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1. 4 3 Optimizing the Radio Link In ideal conditions the nodes and gateway can communicate up to two kilometers apart In order to accomplish this the node and gateway must be installed in a manner that optimizes the wireless transmission The G Link LXRS operates at a 2 4GHz transmission frequency The internal antenna has an omni directional radiation pattern Using any other antenna with the node will void FCC compliance The best method for ensuring optimal radio communication is to conduct an RF survey of the installation site This is easily accomplished in Node Commander by using the range test feature to quantify the radio signal strength RSSI in various scenarios See Range Test on page 32 for instructions on using Node Commander for measuring RSSI The following are general guidelines for maximizing transmission range e Establish Line of Sight LOS between the node and gateway antenna as best as possible Try to avoid obstructions between the antennas such as buildings terrain vegetation or other physical barriers Increase the mounting height of the node to allow a clearer LOS path to the gateway Height above the ground is also important because reflections off of the ground can interfere at the receiver Generally the higher above the ground the better e Minimize Radio Frequency Interference RFI such as other equipment antennas especially those operating in the same frequency range This includes other nodes If
2. W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual 5 2 Using the Internal Node Battery ccc ce eee eee eee eee e ee ee KK KK KK KK KK KK KK IK KH 34 5 3 Charging the Node Battery ooo ccc ce cece ce ee eee ese cee eeeceteceeeeeees 35 5 4 Connecting an External Power Supply 0 0 0 0 20 e cece cece cececceccececeececcececeececeece 36 6 Sensor Settings and Operation K K8 37 6 1 Node Channels Designations 0 20 22 cee e cece cece c eee c ee ceccececcececcececeeceecececesees 37 6 2 Measurement Unis au maha sande seed ze Rat eod LAAN nm roses Eua E SAR KS SK SS SK KS SK KK SR eels KK KK KK SS 38 6 3 Conversion Values aksan Ka KK KK KK KK KK KK KK KK e KK KK KK KK KK KK KK KK HI 39 6 4 Operational Considerations cocci a Ea cece ce eee KK KK KK KK KK KK R 41 6 4 1 Measurement Range 0 2002 ccc cece cece ccc ec cece cece cece sse se EEE ee ee sereni KK KK 41 6 4 2 Node Sampling Rates 0 0 0 002 cc cece ccc cc cece ccc e ec eccecececceccececceeeeceeseceseeeees 41 6 4 3 Gravity Offset decbusnn bed dssddeevasaesdubassidedadsseeccdaccbsavebadidsdedsediascsshesidecs 41 6 5 On board Temperature Sensor 42 7 Troubleshooting 2 20 0 0 ccc cece EEE KSSE se Iesse se eee e ree selle seines 43 7 1 Troubleshooting Guide e eee e eee e em
3. d Radio strength indicates how good the communication is between the gateway and node See Range Test on page 32 e Data file the location and size of the data file as data is added View the data in CSV format with the Open File button f View menu Select between Data Grid and Graph views g End sampling The red X is used to exit the sampling window and or end sampling W4 LORD MicroStrain ee SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview Use the view menu to select the Graph view of the data see Synchronized Sampling Graph View on page 23 Click on the node name to view the graph for that node Click again to hide it D Node 30252 Sync 5 39 Node 31463 Sync _ Fined YAzisZoom 100 lt J3 Flato Xsis Widhe 1500000 1 eos VS Node 31463 Jy _ Figure 13 Synchronized Sampling Graph View a Available Nodes Click on the node to display the graph for that node Click again to hide it Right click on the node name for more menu options such as Stop Nodes and Save Stream b Axis range Select the X axis width and Y axis zoom percentage or use the Auto check box for automatic scaling c Graph The node graph shows the sampled data Each active channel is displayed in a different color The X axis is time in seconds and the Y axis is the A D value bits Right click on the graph for additional m
4. 6 8 hours from a full depletion P charge indicators D C gt AC power PET source Les ti Ot D A power supply plug adapter gt outlet adapters Figure 26 Node Charging W4 LORD MicroStrain 99 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Powering the Node 5 4 Connecting an External Power Supply Apply only the input voltage range specified for the node in the polarity indicated Failure to do so could result in personal injury and permanent damage to the node see Safety Information on page 64 When the internal node switch is set for external power the node may be directly powered by the power supply specified for charging the node or another regulated AC to DC power supply with the appropriate output parameters see Operating Specifications on page 60 It can also be powered by an external battery or other regulated DC supply The supply must deliver a stable voltage between 3 2 and 9 0 V dc and be capable of sourcing at least 100 mA External battery holders and ruggedized outdoor housings that accommodate D cell batteries are available for the G Link LXRS see Node Accessories on page 55 External power is applied through the power supply jack Observe connection polarities or the node may be damaged power jack power jack pin zu Figure 27 External Power Connections W4 LORD MicroStrain m SENSING SYSTEMS G Link LXRS Wireless Acce
5. KK KK mem KK KK KK KK KK KK KK 43 7 2 Device Status Indicators a Le eee aa eat cevsebudcdedlbudeuctevensveecesabbeGes 48 7 3 Updating Node Firmware 0 2 0 0 cece cece cece ec ccc cece eI I ee e KK se ree KK KK KK KK KRI 49 7 4 Repair and Calibration ll lsa SE ma NG ASK SK KK SK KK KK KK RR 51 7 5 Technical Support caves haces editis EI iid b ha h 150 Dak ib etg uus Ere RU Reb kata d k ak 22 a AAO 53 9 Parts and Configurations o cee c ccc ec ee esses IR selle lesen 54 SN Standard Nodos AA AA TENERE 54 9 2 Node Accessories 22 222 252 2c2cdcccedeleeceiee bess iddcecceelesecebeieeieldcecisdedetacetuceiiidacetese 55 9 3 Wireless System Equipment ka A kK AK KK KK KK KK KK KK KK KK KK KK KK KK KK KK 56 9 4 Product Ordering iic Udo obe ga suas les odd deca NO Sade sd bandana KANA JA BAG HAN ab d la yaa Agahan 57 10 Specifications aa ana mah ka NG Gmb AG ce pM re DR deg OPES 58 W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual 10 1 Physical Specifications 15 v2 ccc cscs tert EEE saa Kaka AK LL D redu rci KK KK KK KK KK KK KK KK KK KK 58 10 2 Operating Specifications ence KA KK KAK KAK KK lel 60 10 3 POWBEPIOUBC eee ee eee a kb aaa KK KK KK KK EU 62 10 4 Radio Specifications cscs ccc paa kaka Gg GG a GNG wa GG AGA kd 63 11 Safety Information c eee c ese e
6. LXRS is susceptible to damage and or disruption of normal operation from Electrostatic Discharge ESD For important precautions see Safety Information on page 64 To acquire sensor data nodes are used with any LORD MicroStrain data gateway such as the WSDA Base 10x LXRS or WSDA 1500 LXRS and a software interface LORD MicroStrain has two software programs available for the Wireless Sensor Network SensorCloud and Node Commander SensorCloud is an optional web based data collection visualization analysis and remote management platform based on cloud computing technology Node Commander is used for configuring gateways and nodes selecting sampling modes and parameters initializing data acquisition and viewing and saving data In this section system hardware and software setup is described including an overview of the Node Commander software menus required to configure a sensor connected to the node and begin data acquisition through the gateway It is intended as a quick start guide and is not a complete demonstration of all system or software features capabilities or settings Refer to the Node Commander User Manual the LORD MicroStrain website and the SensorCloud website for more information see References on page 67 W4 LORD MicroStrain n SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 1 Software Installation To install Node
7. Technical Support See Technical Support on page 52 1 6 node battery fault If the battery charge indicator on the node is only dimly illuminated when charging is attempted a battery fault condition has occurred Unplug power and then plug it back in The indicator should turn on brightly indicating charging 1 7 node or gateway is damaged If all power settings and connections have been verified and the node is still unresponsive contact LORD MicroStrain Technical Support See Technical Support on page 52 2 1 node or gateway has no power 2 COMMUNICATION W4 LORD MicroStrain A SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting Problem no communication to the gateway or node 45 Possible cause and recommended solution Verify the node and gateway have power applied and that applicable power switches are on Power is indicated on both devices by a status indicator LED 2 2 gateway has no communication with the computer Verify gateway communication in the software Check remove and reconnect communications and power cables as applicable e For serial gateways verify that the COM port setting For USB gateways verify that the drivers are installed on the computer included with Node Commander and that the software has had sufficient time to detect it For Ethernet gateways use Live Connect to verify communications on a DHCP network Check that the extended
8. a drop down menu will appear amp Base Station Com 36 s v Noda 412 Upgrade Firmware Figure 33 Update Node Firmware W4 LORD MicroStrain to SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 5 Release the F1 key 6 Click Upgrade Firmware and the Node Firmware Upgrade window will appear 7 Click Browse and navigate to the downloaded zhex file 8 Click Write and the upgrade sequence will begin When completed Upgrade Success will appear in the Status column Bootloader Version FW Before Upgrade FW After Upgrade Status 1 06 8 00 8 05 Firmware found Ready Path C VUserslb trutor Desktop imicrostrain wireless frmware V2 1 0 hex Figure 34 Upgrade Firmware Window W4 LORD MicroStrain s0 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 7 4 Repair and Calibration The G Link9 LXRSS is factory calibrated when it is manufactured No further calibration is required General Instructions In order to return any LORD MicroStrain9 product you must contact LORD MicroStrain Sales or Technical Support to obtain a Return Merchandise Authorization number RMA All returned merchandise must be in the original packaging including manuals accessories cables etc with the RMA number clearly printed on the outside of the package Removable batteries should be removed and packaged in sep
9. an electrical circuit due to electromagnetic induction or radiation RSSI Received Signal Strength Indication is a measurement of the transmission power in a radio signal It is measured in decibels with reference to 1 milliWatt dBm RS232 a serial data communications protocol Sensor a device that physically or chemically reacts to environmental forces and conditions producing a predictable electrical signal Sleep a command transmitted to the node to put it into sleep configuration Sampling the process of taking measurements from a sensor or device Sampling Mode the type of sampling that is being utilized such as event triggered continuous or periodic The nodes have several sampling modes that employ these types of sampling Sampling Rate the frequency of sampling W4 LORD MicroStrain e SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual References Slope When describing a mathematically linear relationship the slope is the steepness of the line that represents that relationship on a graph The equation of a straight line is y mx b where xis the x axis coordinate yis the y axis coordinate mis the slope and bis the offset Streaming Streaming is a sampling mode in which all active channels and the sensors attached to them are measured and the acquired data is transmitted to the gateway and software The data is not written to non volatile memory during streaming Streaming can either be
10. finite have a user defined start and end time or continuous continued until the power is cycled on the node Synchronized Sampling asampling mode that automatically coordinates all incoming node data to a particular gateway This mode is designed to ensure data arrival and sequence Transmission rate the number of data packets per transmission window measured in seconds Depending on the sampling mode and settings it will be between 1 and 64 packets second Transmission window the time allowed for one data transmission at the automatically determined transmission rate USB Universal Serial Bus a serial data communications protocol WSN Wireless Sensor Network describes a distribution of sensors and data acquisition equipment that autonomously monitors environmental characteristics such as temperature pressure and strain W4 LORD MicroStrain e SENSING SYSTEMS
11. for the node and gateway is 90 to OdBm The higher the value closer to zero the better but reliable communication can be achieved between 75 dBm and 0 dBm The devices is still able to communicate between 90 dBm and 75 dBm but it could be intermittent or result in data loss Position the node and gateway antennas where the best RSSI value is observed Short Packet Range Test Node 31463 Good Pings 9070 Bad Pings 0 Success Rate 100 00 Base RSSI 12 dBm Min 12 dBm Max 10 dBm 3 j Node RSSI 12 dBm Min 12 dBm Max 10 dBm wen wc Figure 24 Range Test Statistics W4 LORD MicroStrain ee SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Powering the Node 5 Powering the Node Apply only the input voltage range specified for the node in the polarity indicated Failure to do so could result in personal injury and permanent damage to the node see Safety Information on page 64 The node can be powered with either the internal battery or an external source These sources cannot be used simultaneously there is switch on the node to select which source to use When the node is manufactured the switch is set to operate using the internal battery External battery holders are also available for the G Link LXRS and can be used to extend battery operating capacity and duration For more information see Node Accessories on page 55 5 1 Selecting the Power Source There is
12. internal memory and transmit real time synchronized data at a wide range of sample rates and intervals To acquire sensor data the G Link LXRS is used with a LORD MicroStrain data gateway such as the WSDA Base or WSDA 1500 LXRS Figure 1 G Link LXRS Wireless Accelerometer Node W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual 2 1 Components List The G Link LXRS sensors and antenna are integrated so there are no external components or removable parts The node requires a power supply for charging the internal battery and is purchased separately For a complete list of available configurations accessories additional System products and ordering information see Parts and Configurations on page 54 LORD MicroStrain G Link LxRs Wireless Accelerometer Node patent pending 6305 1 4220 01078 3 be 2 Yao Item Description Quantity A G Link 1XRS Wireless Accelerometer Node 1 Charging power supply with plug adapter kit optona 1 User Manual Quick Start Guide and Calibration Certticate 1 Table 1 Node Components List W4 LORD MicroStrain SENSING SYSTEMS Node Overview G Link LXRS Wireless Accelerometer Node User Manual Node Overview 2 2 Interface and Indicators The G Link LXRS includes a power input jack for charging the internal battery or externally powering the node a power on off switch a
13. ka SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 4 Connect to Nodes Several methods can be used in Node Commander to establish communication with the nodes This quick start section covers the two simplest methods adding a node by address and by using the node discovery feature 3 4 1 Adding a Node by Address Adding a node by address requires the node to be on the same communication frequency as the gateway The node address and frequency are indicated in the documentation included with the node when it is purchased 1 Toadda node by address right click on the gateway name in the Controller window and select Add Node gt Add Single Node Figure 5 Adding a Node by Address 2 The node address and frequency are indicated in the documentation included with the node when it is purchased Enter the node address and select OK If the node is not found a message will appear and provide the option to scan for the node on other frequencies Alternately the Node Discovery feature can be used El Node Command i Ele Edit View Launch Application Help mme MANE Beacon is assum e on channel 15 2 425 Ghz Figure 5 Adding a Node by Address 3 4 2 Using Node Discovery The Node Discovery feature allows connection between the gateway and node to occur even if they are on different frequencies To connect to nodes using node discovery begin by making sure
14. manuals http www microstrain com support overview aspx For further assistance our technical support engineers are available to help with technical and applications questions Technical Support sensing support LORD com Phone 802 862 6629 Fax 802 863 4093 SKYPE microstrain wireless support Live Chat is available from the website during business hours 9 00 AM to 5 00 PM Eastern Time US amp Canada W4 LORD MicroStrain Re SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Maintenance 8 Maintenance There are no user serviceable parts on the G Link LXRS For device service and repair contact LORD MicroStrain Technical Support see Technical Support on page 52 Opening the device will void the product warranty W4 LORD MicroStrain e SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Parts and Configurations 9 Parts and Configurations 9 1 Standard Nodes For the most current product information custom and OEM options not listed below refer to the LORD MicroStrain website or contact the LORD MicroStrain Sales Department LORD Model Number Description MicroStrain Part Number Internal 2 gtri axial G LINK LXRS 2G accelerometer 6305 2000 Internal temperature sensor Internal 10 gtri axial G LINK LXRS 10G accelerometer 6305 3000 Internal temperature sensor Calibration Options required for use specify at time of order The G Link LXR
15. optional sampling features configure nodes and to specify where the data will be saved The built in bandwidth calculator displays the total bandwidth used by the nodes selected for synchronized sampling Figure 11 Synchronized Sampling Menu a Save Location indicates where the data file will be saved on the host computer Use the Browse button to select a preferred location b Node configuration includes the node serial number sampling settings bandwidth calculation and current status Highlight any node or group of nodes and the Remove Configure and Refresh buttons become active The Configure button opens the node configuration menus to adjust settings as needed and recalculates the node bandwidth Multiple nodes can be configured together by using the Shift or Ctrl key to select them c Lossless enables the lossless data protocol The protocol enables buffering and retransmission of data in order to provide 100 data collection success Using this feature may increase data display latency W4 LORD MicroStrain ey SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview Save Locaton C ProgramData wicroStrain NodeCommander Data Nodes 2 Type Active Channels Sample Rate Sweeps Node 30252 G unk 106 DRS 1 sizke Unlimited Unat 3 4 Apply Network Configuraton V Enable Beacon on start A Figure 11 Synchronized Sampling Menu d High Capacity reduces
16. standards and publications html Table 6 Related Documents Product Datasheets http www microstrain com wireless sensors Product Manuals and Technical Notes http www microstrain com support docs W4 LORD MicroStrain 67 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual References 12 2 Glossary These terms are in common use throughout the manual A D Value the digital representation of the analog voltages in an analog to digital A D conversion The accuracy of the conversion is dependent on the resolution of the system electronics higher resolution produces a more accurate conversion Also referred to as bits ASTM The Association of Standards and Testing is a nationally accepted organization for the testing and calibration of technological devices Base Station The base station is the transceiver that attaches to the host computer and provides communication between the software and the node s It is also referred to as a gateway Bits the digital equivalent of voltage on the node See A D Value Burst Sampling a mode of operation in synchronized sampling that takes momentary high sample rate readings with configurable time durations and intervals Calibration to standardize a measurement by determining the deviation standard and applying a correction or calibration factor Configuration a general term applied to the node indicating how it is set up for data acquisition It includ
17. the transmit rates in order to optimize bandwidth and power savings among nodes with slower sample rates e Network Bandwidth is the total bandwidth used by all the nodes f Enable Beacon on Start When synchronized sampling is started the nodes wait for the first beacon transmission to initiate sampling When this option is selected default the gateway beacon is enabled and will begin transmitting at a fixed interval when sampling is started Disabling the beacon on start unchecking the box will set the nodes to wait for the beacon but it does not actually start the beacon when sampling is started This can be used if there is a need for sampling to be initiated later or if the beacon is being received from another source than the gateway Enabling the beacon in this way is the same as enabling the beacon in the gateway menu Refer to the Node Commander User Manual for more information g Apply settings and start sampling Before acquisition can begin use the Apply Network Settings to save the session settings to the node When completed select Start Sampling to begin h Close sampling window with the red X to exit sampling or once the sampling has been started to view the data window behind it W4 LORD MicroStrain ei SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview Synchronized sampling features two data views Grid view and Graph view Once sampling is started t
18. timeouts are enabled in the Node Commander Edit gt Preferences menu under Devices Once communication has been established the network configuration can be changed 2 3 node cannot be configured Observe the node status indicator LED to determine the device s state boot idle sample or sleep If the node is sampling or sleeping it cannot be configured In Node Commander execute the Stop Node command to put the node in idle state allowing configuration to occur If the user inactivity timeout is set very low the configuration menu will have to be entered quickly before the timeout occurs putting the node back in a sample or sleep state 2 4 node is out of range Perform a bench test with the node in close proximity to the gateway to verify they are operational For range test and installation recommendations see Range Test on page 32 The system has been tested to operate with the node and gateway up to 2 km apart with clear line of sight 2 5 node is not in normal boot mode W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting Problem Possible cause and recommended solution If the node status indicator shows the node booting in a mode other than the normal boot mode it can be bypassed by toggling the node ON OFF switch rapidly three times then leaving it in the ON position for normal power up In normal boot mode the communication can be established wi
19. utilizing the LORD MicroStrain9 Wireless Sensors Network Software Development Kit see References on page 67 Cc pp computer or network node communication cable CC 39 a power cable as needed PA not used with USB gateways N gateway Figure 3 System Connections W4 LORD MicroStrain Je SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 3 Gateway USB Communication The WSDA Base USB gateway is used as an example in this quick start guide For information on how to use other gateways refer to the gateway or Node Commander user manual see References on page 67 Drivers for the USB gateways are included the Node Commander software installation With the software is installed the USB gateway will be detected automatically whenever the gateway is plugged in 1 Power is applied to the gateway through the USB connection Verify the gateway status indicator is illuminated showing the gateway is connected and on 2 Open the Node Commander software ep Node Commander 3 The gateway should appear in the Controller window automatically with a communication port assignment Figure 4 USB Gateway Communication If it is not automatically discovered verify the port is active on the host computer and then remove and re insert the USB connector eine amp Base Station Com 3 Figure 4 USB Gateway Communication W4 LORD MicroStrain
20. Commander Software Suite on the host computer run the installer executable file and follow the on screen prompts for a complete installation The software is provided with all gateways and is available on the LORD MicroStrain website see References on page 67 The Node Commander software includes hardware drivers required for use with USB gateways Once installed the software will automatically detect and configure any USB gateways that are plugged into the host computer The suite includes the following programs e Node Commander is used for configuring nodes and acquiring viewing and saving data Live Connect is a TCP IP to serial conversion tool that translates the communications between Node Commander and an Ethernet gateway e WSDA Data Downloader is used to download acquired data from the flash memory card embedded in an applicable gateway to a host computer SensorCloud is an optional data collection visualization analysis and remote management tool It is based on cloud computing technology and is accessed directly from a web connection Automatic real time data collection is available through Ethernet gateways such as the WSDA 1500 LXRS and any already collected data can be easily uploaded for visualization and analysis Because it is web based SensorCloud requires no installation For more information see Data Handling on page 24 Users can also design custom programs with the open source data commun
21. LORD USER MANUAL G Link LXRS Wireless Accelerometer Node W4 LORD MicroStrain SENSING SYSTEMS W4 LORD MicroStrain SENSING SYSTEMS MicroStrain Sensing Systems 459 Hurricane Lane Suite 102 Williston VT 05495 United States of America Phone 802 862 6629 Fax 802 863 4093 http www microstrain com sensing support LORD com sensing sales LORD com Copyright O 2015 LORD Corporation 3DM 3DM DH 3DM DH3 3DM GX19 3DM GX2 3DM GX3 3DM GX4 15 3DM GX4 25 3DM GX4 45 3DM GX4 3DM RQ1 AIFP Ask Us How Bolt Link DEMOD DC DVRT DVRT Link EH Link EmbedSense ENV Link FAS A G Link G Link2 HS Link IEPE Link Inertia Link Little Sensors Big Ideas Live Connect LXRS MathEngine MicroStrain MVEH MXRS Node Commander PVEH RHT Link RTD Link SensorCloud SG Link Shock Link Strain Wizard TC Link Torque Link V Link Watt Link Wireless Simplicity Hardwired Reliability and WSDA are trademarks of LORD Corporation Document 8500 0002 Revision C Subject to change without notice G Link LXRS Wireless Accelerometer Node User Manual Table of Contents 1 Wireless Sensor Network Overview 0 00 00 0 2 aaa 6 2 Node Overview E 7 2 1 Components AA eane 8 2 2 Interface and Indicators uiui eee ert eR tbt La sabang KANA kak KK KK KK KK KK KK KK KK KK KK KK KS 9 3 Syste
22. S is available in three versions based on the user selected calibration option The products look and perform a little differently and should be selected based on the application The three calibration options are Standard NIST and ASTM Refer to the operating and mechanical specifications for details see Specifications on page 58 and the applicable Technical Note see References on page 67 e Standard calibrations normalize each sensor channel to the rotation of the Earth s gravitational field This is the least accurate calibration e NIST traceable calibrations normalize each sensor channel to a reference accelerometer that is traceable to the National Institute of Standards and Testing NIST criteria e ASTM traceable calibrations normalize each sensor channel to a reference accelerometer that is traceable to the American Society for Testing and Materials ASTM F2137 criteria This criteria was developed by ASTMspecifically for measuring the dynamic characteristics of amusement park rides This is the most accurate calibration option W4 LORD MicroStrain sa SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Parts and Configurations 9 2 Node Accessories The following parts are available for use with the G Link LXRS For the most current product information custom and OEM options not listed below refer to the LORD MicroStrain 9 website or contact the LORD MicroStrain Sales Department See Product O
23. ain pana Cang BtstoG LE eile Acceleration S o Slope 0 000071 Offset 2 552365 Ka 21 wate Acceleration G Une Y Conversion Formula output siope bits toffset Effective Range 2 552 to 2 101G 3 V hw Acceleration G EJ 4 Temere Low Pass Filter Cutoff 348 pt 500 Hz Figure 31 Advanced Conversion Values Menu Conversion Formula The conversion formula assumes a linear relationship between the original units such as A D bits and new engineering units such as g force and it is expressed mathematically as y mx b where y is the engineering units at a given point measurement mis the slope of the line that represents the linear ratio x is the original unit value at a given point and bis a unit conversion offset in the case of unit conversions or the fixed zero load offset of the sensor in the case of measurement calibration coefficients Negative values may be entered for any coefficient Slope is the linear scaling slope coefficient The slope is the ratio of original units to new engineering units EU and it is used to convert the sensor measurements The slope conversion value will vary depending on the engineering units desired For example if the original unit is A D values bits and the desired engineering units are acceleration in g force the slope conversion would describe how many bits equal one unit of g force bits g Mathematically the slope is min the formu
24. al power supply other than the one used for charging is plugged in several things could happen If it is a power supply that is in the operating range of the charging circuit it may charge the battery If it is below the range of the charging circuit nothing will happen If the applied voltage is above the range of the charging circuit damage to the node will likely occur and personal injury may result e When under battery operation there is a limit to how much current the node can provide to sensors If the node is in an over current condition it will shut off until the cause is removed Using an external power source for the node or sensor can mitigate this issue W4 LORD MicroStrain 93 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Safety Information 11 3 Power Supply The G Link LXRS Wireless Accelerometer Node can be powered by an external source ZNWARNING A CAUTION Ba Apply only the input voltage range specified for the G Link 2 LXRS Connect in the correct polarityto a power source that is near the device is accessible and adheres to all national wiring standards Compliance with wiring standards is assumed in the installation of the power source and includes protection against excessive currents short circuits and ground faults Failure to do so could result in personal injury and permanent damage to the device For details on how to connect the power supply see Connecting an Exter
25. arate protective wrapping Please provide the LORD MicroStrain model number and serial number as well as your name organization shipping address telephone number and email Normal turn around for RMA items is seven days from receipt of item by LORD MicroStrain Warranty Repairs LORD MicroStrain warrants its products to be free from defective material and workmanship for a period ofone 1 year from the original date of purchase LORD MicroStrain will repair or replace at its discretion a defective product if returned to LORD MicroStrain within the warranty period This warranty does not extend to any LORD MicroStrain products which have been subject to misuse alteration neglect accident incorrect wiring mis programming or use in violation of operating instructions furnished by us It also does not extend to any units altered or repaired for warranty defect by anyone other than LORD MicroStrain Non Warranty Repairs All non warranty repairs replacements include a minimum charge If the repair replacement charge exceeds the minimum LORD MicroStrain will contact the customer for approval to proceed beyond the minimum with the repair replacement W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 7 5 Technical Support There are many resources for product support found on the LORD MicroStrain website including technical notes FAQs and product
26. are set in the channel Configuration menu 1 To enter the Configuration menu right click on the Node heading and select Configure gt Configure Node The Channels tab displays channel options available for the current node Channels Streaming Synchronized Sampling Low Duty Cyde Datalogging Power Channel Physical Units Conversion Hardware Label amp Enabled Data Output Units bw Acceleration e 2 1 wate Acceleration do a o 3 V ewe Acceleration E if Temperature Figure 28 Channel Configuration Menu 2 Select the type of measurement from the Class menu and then select Units Bits toG Slope 0 000071 Offset 2 552365 Conversion Formula output siope bits offset Effective Range 2 552 to 2 101G Low Pass Fiter Cutoff 3d8 pt Figure 29 Select Sensor Units W4 LORD MicroStrain i SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Sensor Settings and Operation 6 3 Conversion Values The conversion values for the G Link LXRS are determined when the device is calibrated at the factory and they require no user adjustment Three types of calibrations are available depending on the level of accuracy required for the application a standard calibration a NIST traceable or ASTM traceable calibration For more information see Parts and Configurations on page 54 For applications with unique installati
27. attery 1800 Synchronized Sampling Transmit Only 1600 1400 1200 1000 Average battery life hours 400 200 1sample 2Hz 1Hz per minute t Ichactive 20 36 57 60 62 253 398 605 890 399 1 638 1 654 H 3chactive 11 17 30 42 59 213 493 588 921 398 1 638 1 633 512Hz 256Hz 128Hz 64Hz 32Hz 16Hz Sleep Sample Rate Hz W4 LORD MicroStrain kai SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Powering the Node 5 3 Charging the Node Battery Use only the power supply specified for the node to charge the battery Using a power supply above the rated voltage could cause personal injury and permanent damage to the node For important safety considerations see Safety Information on page 64 l l l Touching sensors or charging the node battery while acquiring data may induce noise on sensitive sensor signals and is not recommended l l 1 Turn the node power switch off and plug the node power supply into the node and then into a 120 240VAC 50 60Hz AC power source Use only the power supply specified for the node Use the supplied power plug adapters as needed 2 Monitor the status of the charge indicators For indicator meaning see Device Status Indicators on page 48 Continue charging until the indicator turns green to indicate a completed charge Charging takes approximately
28. d sending out a status message 1 second pulse Node active and idle Device status indicator Continuously ON be datalogging or streaming Node is sampling in low duty 1 Hz pulse green f cycle or synchronized sampling Node is sending out Pulses for each communication requests such ping as in ping command range test or EEPROM read write Four to seven slow pulses when power Fault condition is initially applied Table 3 Device Status Indicators W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 7 3 Updating Node Firmware Under the recommendation of LORD MicroStrain Technical Support Engineers nodes can be upgraded to the latest available firmware to take advantage of new features or correct operating issues Node Commander version 2 7 0 or greater can be used to update any mXRS or LXRS node or gateway firmware to the most current version Updates are found on the LORD MicroStrain website See Technical Support on page 52 for contact and website information 1 Download the LXRS Firmware Upgrade file from the LORD MicroStrain9 website 2 Once downloaded extract the contents of the zip file into a folder on the computer Verify there is a file with a zhex extension 3 Launch Node Commander and establish communication between the node and gateway as normal 4 While holding F1 button on the keyboard right click the node name and
29. e U S A limited to 10 dBm 10 mW 70 m to 2 km line of sight with RF power setting RF communication protocol IEEE 802 15 4 v WC Internal 3 7 V dc 220 mAh rechargeable lithium polymer battery External 3 2 V dc to 9 V dc P ti See power profile ower consumption http files microstrain com G Link LXRS Power Profile pdf 20 C to 60 C extended temperature range available with custom battery enclosure 40 C to 85 C electronics only Acceleration limit 500 g high g option available Network capacity Operating temperature Physical Specifications Standard and NIST option 58 mm x 48 mm x 21 mm ASTM option X mm x Y mm x Z mm 40 grams Dimensions Environmental rating Indoor use IP65 66 enclosures available ABS plastic Integration Compatible gateways All WSDA base stations and gateways SensorCloud Node Commander WSDA Data Downloader Live Connect Windows XP Vista 7 compatible Data communications protocol available with EEPROM maps Software development kit SDK and sample code OS and computing platform independent http www microstrain com wireless sdk Enclosure material W4 LORD MicroStrain u SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Specifications Parameter Specifications Regulatory compliance FCC U S IC Canada CE ROHS Standard NIST ASTM ASTM option has different physical form factor and frequency filtering Refer to applicable T
30. echnical Note W4 LORD MicroStrain 9 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Specifications 10 3 Power Profile Node power use is highly dependent on the operational parameters such as sample mode and rate More active channels and higher sample rates equate to increased power use Below is an example approximation of the power use of a G Link LXRS over a range of sample rates operating in Synchronized Sampling mode This chart can be used to approximate external node power source requirements For G Link LXRS internal battery life specifications see Using the Internal Node Battery on page 34 G Link LXRS Example Current Use Profile 25 Synchronized Sampling Transmit Only 20 T 15 E v9 3 o 10 m E lt 5 0 1sample Sleep per 1Hz 2Hz 4Hz 8Hz 16Hz 32Hz 64Hz 128Hz 256Hz 512Hz minute 1chactive 0133 0134 0551 0 247 0 363 0 553 0 869 3 537 3 660 3 853 6 158 11 188 88 3 ch active 0135 0 134 0553 0 239 0 374 0 447 1035 3 720 5274 7425 12 719 20255 Sample Rate Hz Figure 35 Example G Link LXRS Power Profile W4 LORD MicroStrain ee SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Specifications 10 4 Radio Specifications The G Link LXRS Wireless Accelerometer Node employs a 2 4GHz IEEE 802 15 4 compliant radio transceiver for w
31. ecifications 10 2 Operating Specifications Parameter Specifications Triaxial MEMS accelerometer 3 channels Internal temperature 1 channel Data storage capacity 2M bytes up to 1 000 000 data points data type dependent Accelerometer Channels Integrated sensors Measurement range 2 gor 10 gstandard Accelerometer bandwidth Oto 500 Hz 10mg Resolution 12 bit Standard and NIST option Single pole Butterworth 3 dB cutoff at 500 Hz factory adjustable ASTM option Six pole Chebyshev filter at a user specified cutoff frequency typically 37 Hz Integrated Temperature Channel Anti aliasing filter bandwidth Measurement Range 40 C to 70 C Accuracy and resolution 2 C at 25 C typical 12 bit Sampling modes Synchronized low duty cycle datalogging Continuous sampling 1 sample hour to 512 Hz Sampling rates Periodic burst sampling 32 Hz to 4096 Hz Datalogging 32 Hz to 4096 Hz Sample rate stability Up to 2000 nodes per RF channel and per gateway depending on the number of active channels and sampling settings Refer to the system bandwidth calculator http www microstrain com configure your system Synchronization between nodes 32 usec Operating Parameters 2 405 to 2 470 GHz direct sequence spread spectrum over 14 Radio frequency RF channels license free worldwide radiated power programmable transceiver carrier from 0 dBm 1 mW to 16 dBm 39 mW low power option available for use outside th
32. ensor data is missing or incorrect 3 no com to node or gateway 3 2 sampling settings are incorrect 3 3 sampling has not started 3 4 sensor channel not configured correctly 3 5 sensor calibration is invalid W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting Problem Possible cause and recommended solution 1 1 node or gateway power is off 1 POWER The status indicator LED on the device may be off Turn the gateway or node does device on and the status indicator LED should illuminate not turn on or node 1 2 external power is off or miswired does not charge Verify the device power source is connected correctly and powered on 1 3 wrong power supply Using a power supply other than the one specified for the device or an external supply that is outside of the device operating range could result in permanent damage to the device or cause it to not work properly 1 4 node internal source select switch is incorrect When the node is manufactured it is set to internal battery operation but it can be configured to accept an external source When set to accommodate an external source the battery cannot be charged 1 5 node battery is dead If the node power source selector is set to internal and the node will not power on or charge the node battery may need to be replaced Contact LORD MicroStrain
33. ensorCloud features and navigation refer to the SensorCloud website or contact LORD MicroStrain Technical Support http sensorcloud com Frequency vs Log Amplitude Peak value of 0 94 at 4 75 Hz 0 100 200 30 400 500 Frequency Hz Figure 19 FFT Graph in SensorCloud W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 9 1 Sensor Data Files Data acquired in Node Commander is stored in CSV format and can be opened with Microsoft Excel Quattro Pro Open Office or other CSV editors spreadsheet programs Data in this format is easily uploaded to SensorCloud using the CSV Uploader The data files can be found on the host computer in the default directory or the location specified at the beginning of sampling as applicable The files are organized in separate folders by mode and then further categorized by date session and or node serial number The default directory is C ProgramData Microstrain NodeCommander SampledData Synchronized sampling and low duty cycle files are found in the Sampled Data folder Datalogging files need to be downloaded from the node before they are available for viewing They can be accessed through datalogging menus as well as the File menu They are stored by default in the Downloaded Triggers folder Streaming data is sto
34. enu options such as View Graph Key Pan Zoom Pause and Remove Graph d View menu Select between Data Grid and Graph views e Data file The location and size of the data file as data is added View the data in CSV format with the Open File button f End sampling The red X is used to exit the sampling window and or end sampling W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 8 Data Handling Data acquired through Node Commander is automatically saved on the host computer see Sensor Data Files on page 28 and can also be viewed from the web based SensorCloud portal Saved data can be uploaded to SensorCloud and Ethernet gateways provide the option to automatically port the data to SensorCloud during data acquisition for near real time display and aggregation SensorCloud is based on cloud computing technology and is designed for long term collecting and preservation of data Features include time series and visualization graphing automated alerts and data interpretation tools such as data filtering statistical analysis and advanced algorithm development with the integrated MathEngine interface Leveraging the open source API SensorCloud can also be used to collect data from other LORD MicroStrain sensor products or third party systems Basic SensorCloud services are available to all users free of charge see Connect to Se
35. erometer Node User Manual Parts and Configurations 9 4 Product Ordering Products can be ordered directly from the LORD MicroStrain website by navigating to the product page and using the Buy feature http www microstrain com wireless For further assistance our sales team is available to help with product selection ordering options and questions Sales Support sensing sales LORD com Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US amp Canada W4 LORD MicroStrain Bf SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Specifications 10 Specifications 10 1 Physical Specifications Standard and NIST option ta 48 7 mm 1 92 in 54 7 mm 19 in CT CT 21 3 mm q 84 in 58 2 mm 2 29 in W4 LORD MicroStrain SENSING SYSTEMS Specifications G Link LXRS Wireless Accelerometer Node User Manual ASTM option 2 4 7 mm THRU 9 19 THRU 65 4 mm 2 58 in 43 2 mm 1 70 in Y Y ba 48 7 mm 1 92 in i EO 38 9 mm 1 53 in 21 3 mm 84 in 1 58 2 mm gt 2 29 in W4 LORD MicroStrain d SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Sp
36. es settings such as sampling mode and rate number of active channels channel measurement settings offsets hardware gain and calibration values Coordinated Universal Time UTC the primary time standard for world clocks and time It is similar to Greenwich Mean Time GMT Cycle Power a command transmitted to the node to reboot it either through a hardware or software switch Data Acquisition the process of collecting data from sensors and other devices Data Logging the process of saving acquired data to the system memory either locally on the node or remotely on the host computer DHCP network Dynamic Host Configuration Protocol is the standardized networking protocol used on Internet Protocol IP networks which automatically configures devices that are attached to it by assigning and configuring the device IP address W4 LORD MicroStrain le SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual References EMI Electromagnetic Interference is an inductive or radiated disturbance that can create signal degradation on electrical signals including loss of data ESD Electrostatic Discharge is the sudden flow of electricity that can occur between two charged objects of different potential that come in contact or in close proximity of each other Static electricity is a common source of ESD Firmware the code that is programmed onto a microcontroller or similar device in an embedded system It includes d
37. evice operation commands conditions memory allocation and many other tasks Gateway The gateway is a transceiver that attaches to the host computer and provides communication between the software and the node s It is also known as a base station Host computer The host computer is the computer that orchestrates command and control of the attached devices or networks LED Light Emitting Diode is an indicator light that is used in electronic equipment LOS Line of Sight is used in radio communications to describe the ideal condition between transmitting and receiving antennas in a radio network As stated it means the antennas are in view of each other with no obstructions LXRS Lossless Extended Range Synchronized is the proprietary LORD MicroStrain data communications protocol used in the wireless sensor network NIST The National Institute of Standards and Testing is a nationally accepted organization for testing and calibration of technological devices Node The node is the wireless transceiver that the sensor s is connected to providing communication with the gateway The G Link LXRS V Link LXRS and SG Link LXRS are examples of nodes manufactured by LORD MicroStrain Node Tester board The Node Tester board is a device designed by LORD MicroStrain that can be plugged into nodes to test their functionality Offset When describing a mathematically linear relationship the offset is the va
38. g a voltage above the input range may result in dangerous battery conditions and cause permanent damage to the node Lithium Polymer batteries contain toxic chemicals that are harmful to humans and the environment Disposal is subject Da to federal and local laws Do not discard the battery or the node in the trash Follow proper battery disposal protocol or contact LORD MicroStrain 9 Technical Support for information on extracting the battery or returning the product for proper recycling and disposal W4 LORD MicroStrain ot SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Safety Information 11 2 User Configurable Power Settings The G Link LXRS Wireless Accelerometer Node can be powered by either the internal battery or an external source There is user accessible switch to select the source The default setting for this switch is for internal battery operation and charging See Selecting the Power Source on page 33 W e Connecting an external power source when the node is set to F3 internal power could result in injury or permanent node damage For details on how to adjust the switch setting see Connecting an External Power Supply on page 36 e Ifthe node is set to use an external source and the charging power supply is plugged in it will power the node from the power supply and not charge the battery It will continue to use the internal battery e Ifthe node is set to internal and an extern
39. hannel b Channel diagram shows channel electronics and data flow c Conversion Coefficients defines the type and units of the measurement being made d Sensor Slope is the sensor sensitivity value used to convert sensor voltage reading to engineering units For the G Link LXRS this value is provided from the factory calibration e Conversion Formula and Effective Range is the formula used to convert sensor readings to engineering units It also shows the resulting sensor measurement range Unable to convert from bits to Acceleration The coefficents have been reset Bits toG d Slope 1 Offset 0 Conversion Formula output slope bits toffset e Effective Range 0 to 40956 Figure 8 Channel Setup W4 LORD MicroStrain M SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 6 Sampling Settings Sampling settings are accessed through the Configure Node menu There is a tab for each sampling mode available for the particular node Figure 9 Sample Settings Menu The G Link LXRS has four primary sampling modes Synchronized Sampling Low Duty Cycle Sampling Streaming and Datalogging Some modes have user configurable settings for sample rate sample duration and datalogging Other settings are automatic depending on number of active channels and other variables For more information on sampling modes refer to the Node Commander user manual see References o
40. has six main views When logging in as a registered user the Device view is the default Navigate to other views by clicking the view name at the top of the page Figure 16 SensorCloud Menu Views The Data and Settings views are only available once a device is selected from the device list GD SensorCloud DEVICES ACCOUNT CSV UPLOADER MATHENGINE e DSen PIE EBENA mcr ans Tr 7 a UIS Device lists select a device to access Data and Settings menus V s Owned Devices N CONFIGURATION LAST HEARD FROM Configuration Demo Devices LAST HEARD FROM Demo Structure I l I 1 Configuration i LI LI Figure 16 SensorCloud Menu Views W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview Device The device list shows every gateway and API device associated with the SensorCloud account including owned shared and demo devices This view provides links to each device s SensorCloud subscription plan configuration options and a summary of last communications and data transactions Account The account view is for logistic management of the SensorCloud account such as changing the log in password user email and billing information CSV Uploader The data upload feature enables data from any source such as non Ethernet LORD MicroStrain gateways or third party sensor to be uploaded to the SensorCl
41. he data grid view is the default view Figure 12 Synchronized Sampling Data View l l l When synchronized sampling is set to slower sample rates it may take several seconds after sampling is initiated for the first sample to appear l l M Base Station Com 3 Monitoring PN Nodes tone View Mode Data Gid Saving To C ProganD ata MicioStrariNodeCommanden Data S amped ata resson 02 18 2014 119 62_27 Magigs 0240001 WWE SPS cou d Ope FieSce193MB N d L TB Moser G Link 10G jode info Channel 1 Channel 2 Channel 3 Channel 4 Channel C Base RSSI Node RSSI ba uan Tu epos Node 20252 1945 EIN HEN S N 2819 43690 Sample Rate sine A Firmware 805 Total Samples 326v WE Memory Fult 1 Tienes Tick 32513 c de Num Triggers 14 Lost ed o Node 31463 Sync PI Success ag Bl Medet V Link Ban 32287 28 25 2 3420 24 46m pra ik Options LXRS Semple Rate ze N j S N 2433 31463 Li Total Samples 2035 1 A Firmware 818 Toner Tick 2034 b Memory Fotos Lost Sangles o 7 i Packet Success 100 0 We Num Triggers 0 N _ Figure 12 Synchronized Sampling Data View a Device status Node sampling mode and gateway status are displayed in parentheses next to the device name b Node information includes node serial number and sampling statistics Right click on the node name for more menu options such as Stop Nodes c Data is adisplay of the sampled data with each channel in a column
42. ications protocol see References on page 67 W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 2 System Connections To acquire sensor data the following components are needed in addition to the node a LORD MicroStrain data gateway and a local or networked host computer with access to the data acquisition software such as Node Commander and SensorCloud For a connections overview refer to Figure 3 System Connections Nodes will communicate with any LORD MicroStrain data gateway The sensor node gateway and software selection is application dependent but the basic interfaces are the same Communication protocols between the gateway and host computer vary depending on which model gateway is used but they all require interface to a host computer or network The WSDA Base 10x LXRS gateway utilizes local serial connections to the host computer such as RS232 and USB and interfaces with the Node Commander software The WSDA 1500 LXRS gateway utilizes Ethernet communications and can be used with Node Commander and SensorCloud although system configuration is completed using Node Commander Gateways with analog outputs can be connected directly to stand alone data acquisition devices for data collection however system configuration will still occur through a USB interface to Node Commander Users can also write custom programs by
43. ing For proper coupling of the accelerometer to the substrate being measured it is recommended that the node or external sensor if applicable be mounted with fasteners on a rigid surface This will reduce higher frequency losses The node can be mounted in any orientation but it is recommended that it is mounted in a way that optimizes wireless communications In the G Link LXRS the accelerometers should be positioned as required for the application see Sensor Frame on page 30 For more information see Optimizing the Radio Link on page 31 48 7 mm __ 1 92 in T C 21 3 mm q 84 in t hap 58 2 mm __ 2 29 in Figure 21 Mounting the Node W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Node Installation 4 2 Sensor Frame During installation the internal accelerometers are oriented such that the axis are aligned appropriately for the measurement application The axis orientation is referred to as the sensor frame and is indicated on the device information label Figure 22 Sensor Frame Each axis has a corresponding channel designation in the G Link LXRS software see Channel Configuration on page 16 sensor frame Figure 22 Sensor Frame W4 LORD MicroStrain m SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Node Installation
44. ireless communication The radio is a direct sequence spread spectrum radio and can be configured to operate on 14 separate frequencies ranging from 2 405 GHz to 2 470 GHz Following the 802 15 4 standard these frequencies are aliased as channels 11 through 24 For all newly manufactured nodes the default setting is 2 425 GHz channel 15 For standard models radiated transmit power is programmable from 0 dBm 1 mW to 16 dBm 39 mW A low transmit power option is available for use in Europe and elsewhere and is limited to 10 dBm 10 mW The radio complies with FCC Part 15 USA and IC Canada regulations The radio is license free worldwide Using antennas and transmission equipment other than what is provided may void FCC compliance l l e The gateway can automatically manage nodes operating on different frequencies by using the Node Discovery feature in Node Commander In this routine the gateway listens for node broadcasts on the frequency channel to which it is set If the node is in normal boot up mode it will provide the broadcast when it is initially powered on and it will broadcast on all channels As long as the node is powered on after activating the Node Discovery feature the gateway will link to it and remember the channel setting for future node queries l l l l l l l l l l l l l l l l l l l l e Manually matching the node and gateway frequency channels is
45. la y mx b Offset is the linear scaling offset coefficient and it is typically the starting output value of the sensor with no load applied in the original units Mathematically the offset is bin y mx b Effective Range the effective range is the calculated sensor measurement range in engineering units EU The effective range is dependent on the slope offset and resolution of the node The effective range is the number of bits per EU unit slope multiplied by the total number of bits minus the offset if applicable W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Sensor Settings and Operation 6 4 Operational Considerations 6 4 1 Measurement Range The accelerometer bandwidth limits the range of frequencies that can be measured As the measured vibration frequency approaches the upper bandwidth limitation of the accelerometer the accelerometer sensitivity decreases The result is a predictable reduction in the measured vibration amplitude when measuring beyond the bandwidth limit The bandwidth limitation is indicated in the node specifications see Specifications on page 58 The low pass filter cutoff frequency setting see Channel Configuration on page 16 limits the measured readings that will be reported based on the frequency of the signal Frequency readings above the selected setting will decrease in amplitude just as with the accelerometer bandwidth limit For best
46. lerometer Node User Manual Sensor Settings and Operation 6 Sensor Settings and Operation The node configuration interface includes settings for measurement units and conversion values The G Link LXRS sensors are calibrated at the factory and require no user adjustment of the conversion values There are preset measurement units as well as a user defined field Because the wireless sensor system is digital the analog voltage readings from the sensors are converted into a digital equivalent value based on the volt to bit scale of the internal analog to digital voltage converter A D converter Sensor readings can be displayed and recorded in A D value bits directly or further converted to engineering units by applying conversion values and a conversion formula For more information see Conversion Values on page 39 and for instruction of adjusting units see Measurement Units on page 38 6 1 Node Channels Designations Sensors are assigned to a specific channel number at the factory and cannot be changed For sensor orientation information see Sensor Frame on page 30 Channel Description accelerometer channel 1 x axis accelerometer channel 3 z axis temperature channel Table 1 Channel Designations IE EHI accelerometer channel 2 y axis W4 LORD MicroStrain d SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Sensor Settings and Operation 6 2 Measurement Units Sensor measurement units
47. lue where the line that represents the relationship in a graph crosses the y axis The equation of a straight line is y mx b where xis the x axis coordinate yis the y axis coordinate mis the slope and bis the offset W4 LORD MicroStrain o9 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual References Oversampling In signal processing oversampling is a technique used to achieve increased signal resolution and better noise immunity by recording readings at a higher frequency than the output of the device being measured In analog to digital conversion the higher the oversampling rate the better the recreated analog signal Packet unit of sampled data Ping a byte transmitted by the gateway to the node The node responds by echoing the byte indicating communication exists between the node and gateway Range Test a continuous string of pings used to validate communication between the gateway and the node over distance and obstruction Read Write EEPROM commands transmitted to the node to read or write parameters stored in the node s operating system Real Time Clock RTC a computer clock that keeps track of the current time Resolution in digital systems the resolution is the number of bits or values available to represent analog values or information For example a 12 bit system has 4 096 bits of resolution and a 16 bit system has 65 536 bits RFI Radio Frequency Interference is a disturbance in
48. m Operational Overview sese SK SK KK KK KK KRI 10 3 1 Software Installation tede kaka kasa pupa Di meu QUUD I KK KK KK KK KK KK KH 11 3 2 System Connections saa kas eee ececceceececeececeececceceesecseceees 12 3 3 Gateway USB Communication 02 c eect ense sees neis 13 34 Rep natal N e decedent Sess Sodas Beet ipiyiBDnDM 14 3 4 1 Adding a Node by Address 14 3 4 2 Using Node Discovery 2 20 0 ccc EEE EEE EEE EE EEE ses e seems ee ee se se se selle sees 14 3 5 Channel Configuration eccesso BAD GNG ALY oe e rice ESO DI pUir Ve epe SEC wade MED eua ee Erga dine e 16 3 6 Sampling Settings ayaan a Aa kba aga od aata 18 3 7 Data Acquisition 2 0 0 0 00 asas eee eee c cece ese ee se se e ese e sse se se se reli 19 3 8 Data Handling 5n 0n Sk u 2005 e e e e me ee 550 0500 rs ree se sess el bed 24 3 9 Connectto SensorCloud M aa 25 3 9 1 Sensor AA 28 4 Node Installation 3 3 3 29 4 1 Mounting Recommendations sess se rs sse se lesse lees 29 AB a AA 30 4 3 Optimizing the Radio Link e cece cece cece e ee Ime e mem me KK KK KK KK KK KK KK KK 31 4 3 1 RangeTest ELLES sse ee lesse se Iesse sess teer ie sees sees 32 5 Powering the Node 2222220000 00 0 La 33 5 1 Selecting the Power Source o cece e cece cece cece ec ec ce ceccececcececceceececeececseceees 33
49. ming as expected enter the node configuration menu and verify the W4 LORD MicroStrain ii SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting Problem Possible cause and recommended solution sampling settings 3 3 sampling has not started If sampling is occurring the sampling mode will be displayed next to the node name in Node Commander The node device status indicator will also be flashing the sampling mode code If the node is not sampling activate it in the software or with a sample on start up boot sequence W4 LORD MicroStrain a SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 7 2 Device Status Indicators The following is a complete list of the G Link LXRS status indicators Indicator Symbol Behavior Node Status OFF No power source detected ON green Charging source detected OFF Node not charging OFF Battery charge source indicator Battery charged indicator ON bright red Node battery charging Node charge status unknown ON green Battery fully charged ON green and Battery fault condition Reset battery charging by unplugging power and then indicator ON red plugging it back in Node OFF or sleeping OFF with Node sleeping with radio check intervals enabled default is occasional flash every 5 seconds Completed charge indicator Tar rapie Hashes Node booting normally and when power is initially applie
50. n page 67 l l l i Streaming mode which enables continuous sampling and transmitting uses a large amount of system bandwidth and can significantly reduce node battery life Streaming is recommended primarily for diagnostics and is not supportedin SensorCloud l l In general when determining which sample mode and rate is most suitable for the application consider the following e Increasing the sample rate or duration reduces the available over the air transmission bandwidth and therefore also reduces the number of nodes that can be reporting simultaneously e Increasing the sample rate or duration increases the power requirement of the node and therefore reduces the node s battery life e When measuring vibration or other analog signals it is important to use a sample rate at least twice the value of the target measurement frequency This is the minimum sample rate required to produce an accurate digital representation of the measured signal The higher the sample rate the more accurate the digital representation W4 LORD MicroStrain 18 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview E Burst Sample Rate 512 Hz xj Unlimited Sample Duration Time Duration 0 195313 sec Percent of Total Bandwidth 25 02 Event Driven Sampling F Enable Figure 9 Sample Settings Menu 3 7 Data Acquisition l l l i Once sampling has started it will c
51. nal Power Supply on page 36 114 ESD Sensitivity The G Link9 LXRS 9 is susceptible to damage and or disruption of normal operation from Electrostatic Discharge ESD particularly during data acquisition AXCAUTION a ESD damage can occur when the device is touched especially at NP the device interfaces such as the antenna and connectors Use Q 7 A proper grounding techniques when handling If an ESD event t occurs and operation has been interrupted reset the device by cycling power to it and or restarting the operational mode in the system software W4 LORD MicroStrain m SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual References 12 References 12 1 Reference Information Many references are available on the LORD MicroStrain website including product user manuals technical notes and quick start guides These documents are continuously updated and new applications are added They may provide more accurate information than printed or file copies Document Where to find it SensorCloud http www sensorcloud com system Overview overview Math Engine Overview http www sensorcloud com mathengine LORD MicroStrain Wireless Sensors http www microstrain com wireless sdk Network Software Development Kit P Product Application Notes http www microstrain com applications NIST Calibration Procedures http www nist gov calibrations ASTM Testing Procedures http www astm org Standard
52. nsducers load cells torque and vibration sensors magnetometers 4 to 20mA sensors thermocouples RTD sensors soil moisture and humidity sensors inclinometers and orientation and displacement sensors Some nodes come with integrated sensing devices such as accelerometers System sampling capabilities are IEEE 802 15 4 compliant and include lossless synchronized sampling continuous and burst sampling and data logging A single gateway can coordinate many nodes of any type and multiple gateways can be managed from one computer with the Node Commander and SensorCloud software platforms Integration to customer systems can be accomplished using OEM versions of the sensor nodes and leveraging the LORD MicroStrain data communications protocol Common wireless applications of LORD MicroStrain Sensing Systems are strain sensor measurement accelerometer platforms vibration monitoring energy monitoring environmental monitoring and temperature monitoring W4 LORD MicroStrain 8 SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Node Overview 2 Node Overview The G Link LXRS wireless sensor node features two integrated high speed 2 gor 10 g micro electro mechanical MEMS accelerometers and an internal temperature sensor The combined readings from the accelerometers produce a triaxial acceleration output The node has 12 bit resolution with a measurement bandwidth of 0 to 500 Hz The node can log data to
53. nsorCloud on page 25 ch2 1Hz ch3 1Hz cha 1Hz N f N Timestamp GMT chi ch2 ch cha L4 Lh NA 53 17 5 1479 45 1494 594 0 703699 2166 703 Fr quaney vs LoglAmplitude 53 199 1473 023 1488 775 0 703585 2166 704 53 20 9 1474 546 1492 239 0 704699 2166 704 53 21 9 1475 745 1493 966 0 704446 2166 704 53 229 1476 143 1491 654 0 705406 2166 705 53 23 9 1486 709 1492 854 0 705149 2166 705 53 24 9 1486 581 1492 897 0 704863 2166 706 53 25 9 1477 195 1488 558 0 70439 2166 706 53 26 9 1486 35 1493 403 0 70435 2166 707 53 273 1475 12 1488 122 0 70352 2166 707 53 28 9 1473 597 1491 184 0 706812 2166 707 Figure 14 Data Storage Display and Processing W4 LORD MicroStrain E SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 9 Connect to SensorCloud Ethernet gateways such as the WSDA 1500 LXRS can be enabled to upload data automatically to SensorCloud once the node sampling has been activated Refer to the gateway user manual for more information To connect to SensorCloud go to the SensorCloud website log in page and enter the log in credentials Register as a new user if needed http sensorcloud com log in SensorCloud Login Email Password orgot your password Login Don t have an account Sign Up now Figure 15 SensorCloud Log in or Register The SensorCloud interface
54. on conditions it may be desirable to adjust the conversion offset value or perform a field calibration To determine if this is appropriate contact LORD MicroStrain Technical Support see Technical Support on page 52 The conversion values include the slope offset and formula for converting the sensor A D value bits to engineering units The bits are the digital representation of the sensor voltage output The type of sensor channel and desired engineering units determine what conversion values are available The conversion values are entered via the Node Commander and saved in the node memory for the applicable channel The conversion values can be entered in two menus Figure 30 Abbreviated Conversion Values Menu and Figure 31 Advanced Conversion Values Menu The channel Configuration menu has more options than the Calibration Coefficients menu but both are acceptable ways to enter the values and formulas Unit Slope Offset G w 0 000071 2 552365 0 000072 2 567206 0 000072 2 600181 Gs s 0 06228 158 658005 kok cwm Figure 30 Abbreviated Conversion Values Menu W4 LORD MicroStrain id SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Sensor Settings and Operation f Configuration Channel Channels Streaming Synchronized Sampling Low Duty Cyde Datalogging Power RF Info Channel Physical Units Conversion Hardware Enabled Data Output Units G
55. ontinue as configured without the need to leave Node Commander open However if the node is powered off and is not configured to sample on boot up data acquisition will end and must be restarted in Node Commander l When data acquisition is started each of the sampling modes has different menu options and Views Some open a settings menu before data acquisition begins and may include a data list View and or a graph view The following is an example of Synchronized Sampling Figure 10 Starting a Sampling Session For more information about synchronized sampling and using the gateway beacon see Data Acquisition on page 19 For more information about other sampling modes refer to the Node Commander user manual see References on page 67 To start a sampling session nodes can be selected individually or as a group When selected as a group they will all be set to the same sampling mode Right click on the nodes and select Sample 5 Synchronized Sampling W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview Ke Base Station Com 3 v w89 Node 314i Sample Ke Base Station Com 3 y Nod o gt ee Synchronized Sampling Low Duty Cycle Trigger Datalogging Download Triggers Figure 10 Starting a Sampling Session When a synchronized sampling session is started the sampling menu appears and includes settings to enable
56. other antennas are required nearby mount them at different heights to minimize interference Additionally the specific node frequency is selectable within its operational range using the Node Commander software Set the devices to different transmission frequencies Minimize Electromagnetic Interference EMI such as that which is generated by power transmission equipment microwaves power supplies and other electromagnetic sources e Metal Objects in close proximity to either antenna particularly ferrous metals such as steel and iron can be problematic for wireless communications The larger the object the greater the influence W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Node Installation 4 3 1 Range Test After establishing communication between node and gateway use the range test feature in Node Commander to monitor the signal strength and to optimally position the nodes gateway and antennas for installation Maximum achievable range is determined by the gateway and node power settings found in the device Configure menu and is highly dependent on the physical environment surrounding the devices 1 Right click on the node header and select Communicate Range Test Da Communicate Configure Stop Node Load Node Information Power Management Remove Node Num Triggers 0 Figure 23 Range Test Menu 2 The total RSSI range
57. oud platform The data must be in the LORD MicroStrain CSV format Data This view is only available after a device is selected It displays data that is collected from sensor nodes or uploaded from files Data selections are listed by node channel or a user defined label and can be enabled for display in the graph window The interactive graph has navigational features such as panning zooming and an overview graph for single click access to data points or ranges There are also use and management features such as viewing the meta data and downloading embedding and tagging data graphs Figure 17 SensorCloud Data View Settings The settings view provides options for adding meta data configuring the data displays for each channel creating alerts based on data thresholds setting the data timezone and more MathEngine is used to analyze sensor data Functions include the ability to filter out frequencies smooth out noisy data perform math operations such as Fast Fourier Transforms W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview FFTs and more Figure 18 MathEngine View MathEngine interfaces with the SensorCloud graphing view for faster processing Users can write their own algorithms for custom applications Refer to the MathEngine website for more information http sensorcloud com mathengine For more information about S
58. performance select a cutoff frequency that is no more than half of the sample rate For example if the target measurement is 100 Hz and the sample rate is set to 500 Hz set the cutoff frequency between 100 Hz and 250 Hz 6 4 2 Node Sampling Rates The G Link LXRS is capable of sampling up to 4096 Hz For measuring vibration it is recommended to use a sample rate at least twice the value of the target frequency This is the minimum sample rate required to produce an accurate digital representation of the measured signal For example if the target measurement is 100 Hz the sample rate should be setto 200 Hz or higher While the G Link LXRS is capable of high sample rates and high resolution conversions the integrated accelerometer may limit performance in certain circumstances For example even though the G Link LXRS can sample up to 4096 Hz the integrated accelerometer in the standard configuration only has a bandwidth of500 Hz Setting the node to sample at 4096 Hz would result in oversampling by a factor of about 8 which is well over typical practices Oversampling by a factor of 4 times is enough for most applications 6 4 3 Gravity Offset During data acquisition it is normal to see up to 1g offset due to the effects of gravity on the sensor axis Figure 32 Gravity Offset For more information on the sensor reference frame see Sensor Frame on page 30 W4 LORD MicroStrain i SENSING SYSTEMS G Link LXRS Wireles
59. power source selector switch and mounting holes for device installation The radio frequency RF antenna is internal to the node The indicators on the G Link LXRS include a device status indicator a battery charging indicator a completed charge indicator and a charge source indicator The following table describes basic indicator behavior During data acquisition the device status indicator has other sequences see Device Status Indicators on page 48 device information label including orientation mounting holes f N l INA power source ON OFF switch switch power jack BOTTOM VIEW Figure 2 Interface and Indicators Indicator Symbol Behavior Node Status Battery charge v No power source detected source indicator Charging source detected Battery charging Node not charging indicator ON bright red Node battery charging Completed OFF Node charge status unknown charge indicator sate uy charge OFF NodeOFF Device status mea dicat Rapid flashing Node booting up indicator 1 second pulse Node active and idle Table 2 Indicator Behaviors W4 LORD MicroStrain P SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 3 System Operational Overview The G Link LXRS contains an internal rechargeable Lithium Polymer Li Po battery For important precautions see Safety Information on page 64 The G Link
60. rdering on page 57 Description Part Number i Ji _ r a Charging power supply for G Link LXRS with international 6302 1000 plug adapters IP66 NEMAA rated rugged outdoor enclosure for G Link LXRS 6306 0100 IP66 NEMAA rated rugged outdoor enclosure for G Link9 L XRS with two D cell battery capacity 6306 0200 LORD MicroStrain for G Link LXRS with three D cell battery capacity D cell battery tray for use with wireless nodes indoor use AA cell battery tray for use with wireless nodes indoor use Table 4 Node Accessories W4 LORD MicroStrain m SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Parts and Configurations 9 3 Wireless System Equipment The following system parts are available for use with the G Link LXRS For the most current standard custom and OEM product options refer to the LORD MicroStrain website or contact the LORD MicroStrain Sales Department See Product Ordering on page 57 LORD Model Description MicroStrain Part Number WSDA 1500 SK_ Ethernet Data Gateway Starter Kit 63141501 Noge Commander Software 6301 0300 SensorCloud Software Subscription re lt _ VU o Replacement USB cable 9022 0029 7 USB Gateway cable extender 6307 0900 Replacementserialcable 4005 0005 Ethernet Data Gatewa Table 5 Wireless System Equipment W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accel
61. red in the Streaming folder file Edi View Launch Application Help J ___EsplereData Directoy e i Upload Data to SensorCloud X Exit XJ Node372 Fe eit View Toots Hep J Organize gt Gg Open Include in library gt Share with Bum New folder amp M a libraries Ji Sampled Data fM Computer amp Local Disk C KA JT amp Microstrain NodeCommander Data Sampled Data session 09 30 2013 T19 46 08 File Edit View Jools Help Organize Rj Open Print Burn New folder X Favorites BE Desktop Ei Master_09 30 2013 T19 46 08 csv Ji Downloads Ei Node372 csv JU Recent Places BQ Sensorinfo_09 30 2013 T19 46 08 csv v2 E Ei SyncNetworklnfo 09 30 2013 T19 46 08 9 30 2013 3 46 PM Microsoft Office E 1 KE jM Computer amp Local Disk C Figure 20 Exploring Data W4 LORD MicroStrain ai SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Node Installation 4 Node Installation 4 1 Mounting Recommendations The G Link LXRS is rated for indoor use only unless housed in a ruggedized outdoor enclosure Enclosures for the G Link LXRS are available from LORD MicroStrain Some also accommodate D cell batteries extending the battery operating capacity and duration For more information see Node Accessories on page 55 There are two mounting tabs on the node with holes for fasten
62. required in some applications For example when sending broadcast messages from the gateway to multiple nodes including the synchronized sampling beacon all nodes must be on the same channel as the gateway in order to receive the broadcast Assigning channels is also a good idea when multiple gateways are attached to one host computer or when other wireless equipment is nearby and frequency or transmission interference may occur W4 LORD MicroStrain ee SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Safety Information 11 Safety Information This section provides a summary of general safety precautions that must be understood and applied during operation and maintenance of components in the LORD MicroStrain Wireless Sensor Network Throughout the manual ANSI Z535 standard safety symbols are used to indicate a process or component that requires cautionary measures 11 1 Battery Hazards ZNWARNING ACAUTION MYA The G Link LXRS contains an internal rechargeable D W 9 Lithium Polymer battery Lithium Polymer batteries are a fire A and explosion hazard Do not store or operate the node at E temperatures above 212 F 100 C Do not disassemble short circuit crush puncture or otherwise misuse the battery When recharging the node internal battery use only the power supply specified for node charging and follow the amp Wy D instructions See Charging the Node Battery on page 35 FIT A Applyin
63. s Accelerometer Node User Manual Sensor Settings and Operation Figure 32 Gravity Offset 6 5 On board Temperature Sensor The G Link LXRS has an on board solid state temperature sensor mounted on the surface of the circuit board e The temperature sensor output is connected to channel 4 of the G Link LXRS e Refer to the node specification table for the temperature sensor operating parameters see Operating Specifications on page 60 W4 LORD MicroStrain He SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Troubleshooting 7 Troubleshooting 7 1 Troubleshooting Guide 43 1 POWER gateway or node does not turn on or node does not charge ind node or gateway power is off 12 external power off or miswired nS wrong power supply or voltage 1 4 node internal source select incorrect 1 5 node battery is dead 1 6 node battery fault 1 7 node or gateway is damaged 2 COMMUNICATION no communication to the gateway or node PA node or gateway has no power 2 2 gateway has no com with computer 2s node cannot be configured 2 4 node is out of range 25 node is not in normal boot mode 2 6 node is sampling 27 node is sleeping 2 8 gateway or node is damaged 3 DATA ACQUISITION s
64. sse e lel less lese li 64 11 1 Battery HazardS RRRRERRRURRRRR 64 11 2 User Configurable Power Settings se esee ele 65 11 3 Power OUDDIY meicneoir e ea aier aaa EEE EEL eas eee needa 66 TEA 2 PE AA 66 12 References MARTKIKKCC EELMES 67 12 1 Reference Information aaa aero aero reae ce x renes SK KARS KAK KK KK KK KS KK KK een 67 122 Glossa neee AER Ne nO TORENT OSE MEL E OEE See ER TE RT EA 68 W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Overview 1 Wireless Sensor Network Overview The LORD MicroStrain Wireless Sensor Network is a high speed scalable sensor data acquisition and sensor networking system Each system consists of wireless sensor interface nodes a data collection gateway and full featured user software platforms based on the LORD MicroStrain Lossless Extended Range Synchronized LXRS data communications protocol Bidirectional wireless communication between the node and gateway enables sensor data collection and configuration from up to two kilometers away Gateways can be connected locally to a host computer or remotely via local and mobile networks Some gateways also feature analog outputs for porting sensor data directly to standalone data acquisition equipment The selection of available nodes allows interface with many types of sensors including accelerometers strain gauges pressure tra
65. th automatic node discovery or manually once the boot process is complete and the node is in idle state Start up mode can then be changed in the software 2 6 node is sampling Observe the node status indicator LED to determine the device s state boot idle sample or sleep If the node is sampling it cannot be configured In Node Commander execute the Stop Node command to put the node in idle state allowing configuration to occur 2 7 node is sleeping Observe the node status indicator LED to determine what state itis boot idle sample or sleep If the node is sleeping it cannot be configured In Node Commander execute the Stop Node command to put the node in idle state allowing configuration to occur 2 8 gateway or node is damaged Verify all connections power and settings If available try installing alternate nodes and gateways one at a time to see if the faulty device can be identified If no conclusion can be determined or to send a device in for repair contact LORD MicroStrain Technical Support See Technical Support on page 52 3 1 no communication to node or gateway 3 DATA ACQUISITION Verify connections and power to the node and gateway Verify they are powered on and communicating with the software Enter a configuration menu to verify that the node can be accessed sensor data is missing or incorrect 3 2 sampling settings are incorrect If the sampling mode rate or duration are not perfor
66. the node s are powered off W4 LORD MicroStrain Wu SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview not in normal boot up mode the assigned one can be bypassed to enable node l l l l i Automatic node discovery may not work in some boot up modes If the node is l l l discovery For more information see Troubleshooting on page 43 l 1 Right click on the gateway name and select Add Node gt Node Discovery Figure 6 Using Node Discovery 2 Turn on the node with the node power switch Within a few seconds during power up the node will transmit a message with its operating frequency 3 When the device status indicator on the node ends the rapid flash sequence and begins pulsing at one second intervals it has completed the normal boot up sequence and is running in idle mode At this point the node should be listed in the Controller window and scanning can be stopped by selecting the Stop button in the Node Discovery window amp Base Station Com 3 Node 372 NEW Please cycle the power on all nodes you d like Node Commander to find Discovered nodes will show up under Base Station Com 3 Clickthe stop button to leave node discovery mode T Find sampling nodes on frequency 23 Figure 6 Using Node Discovery W4 LORD MicroStrain i SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational O
67. user accessible switch to select the power source 1 Verify the node power switch is in the OFF position and no external power is applied 2 Use a small flat head screwdriver to push the recessed switch fully to the desired position as indicated in Figure 25 Power Source Selection The figure shows the node configured for an internal power source power source selector switch BOTTOM VIEW EXTERNAL switch position INTERNAL BATTERY Figure 25 Power Source Selection W4 LORD MicroStrain SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual Powering the Node 5 2 Using the Internal Node Battery The G Link LXRS contains an internal rechargeable Z WARNING Lithium Polymer Li Po battery For important precautions see Safety Information on page 64 When the internal node switch is set for internal power the node is powered by a rechargeable 220 mAH lithium polymer battery This battery is not user serviceable Node battery life is highly dependent on operational parameters such as sample mode and rate More active channels and higher sample rates equate to decreased battery life The following graph shows an example approximation of the battery life for a G Link LXRS over a range of sample rates operating in Synchronized Sampling mode For additional G Link LXRS power specifications see Power Profile on page 62 Battery life aproximation for G Link LXRS 220mAH internal b
68. verview 3 5 Channel Configuration The sensor settings are stored in the node memory and each sensor is assigned a corresponding channel number Only the channels and configuration options that are available on the type of node being used will appear in the configuration menus 1 To enter the configuration menu right click on the node name and select Configure gt Configure Node The Channels tab displays channel options available for the node a Channel Enabled indicates the sensor channel number The check box is used to enable the channel and select it for sampling The icon next to the check box describes the channel type inherentto the node being used b Current channel configuration The Data Output Units Input Range and Label fields describe how the channel is currently configured c Configure Select the channel s Configure button to change the channel parameters such as measurement units gain and offset settings and calibration values The channel must be enabled first by selecting its adjacent check box Figure 7 Node Channels Menu W4 LORD MicroStrain 3e SENSING SYSTEMS G Link LXRS Wireless Accelerometer Node User Manual System Operational Overview 2 To enter the channel configuration menu select the Configure button as shown in Figure 7 Node Channels Menu The channel configuration menu options change depending on the sensor type selected a Channel Label names the c

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