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V-Link

-200

User Manual

6.7.1

Differential Sensors

Sensors that are classified as differential sensors often utilize a Wheatstone Bridge configuration.

These sensors are essentially a resistive load that use the bridge configuration to detect very small

resistive changes and produce a precise voltage output as a result. Some examples include strain

gauge elements or strain gauge-based sensors, such as some load cells and pressure transducers,

as well as some soil moisture, temperature, and other sensors. For use with the V- Link- 200,

sensors with an impedance of ≥ 120 Ω are recommended.

Calibration in the SensorConnect software for these devices varies depending on the type of sensor

and includes using the shunt calibration for strain gauges. The following diagrams show how to

connect these types of sensors. Note: Full- Bridge is the standard LORD Sensing offering.

Calibration for Half-Bridge, Two Wire Quarter-Bridge, and Three Wire Quarter-Bridge requires the

optional on-board bridge completion.

See Sensor Calibration on page 55

for more information.

Figure 35 - Full Bridge Wiring

Содержание V-Link-200

Страница 1: ...LORD USER MANUAL V Link 200 Wireless 8 Channel Analog Input Sensor Node ...

Страница 2: ...liston VT 05495 United States of America Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US Canada http www microstrain com sensing_support LORD com sensing_sales LORD com Document 8500 0063 Revision H Subject to change without notice ...

Страница 3: ...cation 17 3 4 Connect to Nodes 18 3 4 1 Automatic Node Discovery on Same Frequency 18 3 4 2 Automatic Node Discovery on Different Frequency 18 3 4 3 Manually Add Node 20 3 5 Configure Node 23 3 6 Configure and Start Sampling 25 4 Viewing Data 28 4 1 SensorConnect 28 4 1 1 Using Dashboards and Widgets 28 4 1 2 Navigating Graphs 28 4 1 3 Widgets Options 29 4 1 4 Time Series Widget Menu 29 4 1 5 Expo...

Страница 4: ... Channel Raw Voltage 46 6 7 3 Measuring Small Voltages 47 6 8 Single Ended Input Channels 48 6 8 1 Measuring Small Currents 4 to 20mA Sensors 50 6 9 Using the Excitation Output as a Switch 51 6 10 Thermocouples 52 6 11 Connecting Accelerometers 53 6 12 On board Temperature Sensor 53 7 Sensor Settings 54 7 1 Sensor Calibration 55 7 1 1 EXAMPLE Internal Shunt Calibration 57 7 1 2 Calibration Lab or ...

Страница 5: ...aintenance 87 10 Parts and Configurations 88 10 1 Standard Nodes 88 10 2 Node Accessories 88 10 3 Recommended Sensors 89 10 4 Wireless System Equipment 90 11 Specifications 92 11 1 Physical Specifications 92 11 2 Operating Specifications 93 11 3 Radio Specifications 94 11 4 Frequency Setting 95 12 Safety Information 96 12 1 Replacing Batteries 96 12 2 Battery Hazards 96 12 3 Power Supply 97 12 4 D...

Страница 6: ...face with many types of sensors including accelerometers strain gauges pressure transducers load cells torque and vibration sensors magnetometers 4 to 20 mA 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 include lossless sy...

Страница 7: ...ur channels for single ended sensor measurement four channels for differential sensor measurement and an on board internal temperature sensor V Link 200 inputs are 18 bit resolution with 0 1 full scale measurement accuracy The node can log data to internal memory transmit real time synchronized data and it supports event driven triggers with both pre and post event buffers To acquire sensor data t...

Страница 8: ...ble configurations accessories additional system products and ordering information see Parts and Configurations on page 88 Item Description Quantity A V Link 200 1 B Antenna with right angle adapter 1 C Node tester board 1 D AA Lithium batteries 3 6 V dc 2 4 Ah 4 E DIN rail clip 1 6 32 x 3 8 Thread forming screws 3 Calibration Certificate 1 8 ...

Страница 9: ... there is an error Figure 2 Interface and Indicators Indicator Behavior Node Status Device status indicator OFF Node is OFF Rapid green flashing on start up Node is booting up 1 slow green pulse per second Node is idle and waiting for a command 1 green blink every 2 seconds Node is sampling Blue LED during sampling Node is resynchronizing Red LED Built in test error Table 1 Indicator Behaviors 9 ...

Страница 10: ...s l Diagnostic Info Interval The report rate of the diagnostic packet User set between 30 seconds and 65536 seconds The following data channels are available o Current State The current state of the device when the Diagnostic Packet is sent o 0 Idle o 1 Deep Sleep o 2 Active Run o 3 Inactive Run o Run Time The number of seconds the Node has been in each state o Reset Counter The number of times th...

Страница 11: ...ger Index The index of the most recent Event Trigger logged to the Node When this number changes a new event has occurred o External Power Flag indicating if external power is connected or not o 0 Not Connected o 1 External Power Connected o Internal Temperature The internal temperature of the Node in degrees Celsius l Storage Limit Mode Determines the behavior of the storage as either first in fi...

Страница 12: ...V Link 200 User Manual Figure 4 Viewing Node Diagnostic Data 12 ...

Страница 13: ...ode When sampling stops the node is switched into idle mode which is used for configuring node settings and allows toggling between sampling and sleeping modes The node will automatically go into the ultra low power sleep mode after a user determined period of inactivity The node will not go into sleep mode while sampling Figure 5 Node Operational Modes 13 ...

Страница 14: ...nal web based data collection visualization analysis and remote management platform based on cloud computing technology SensorConnect is PC based software used for configuring gateways and nodes selecting sampling modes and parameters initializing data acquisition and viewing and saving data 3 1 Software Installation Install the SensorConnect software on the host computer before connecting any har...

Страница 15: ...V Link 200 User Manual 15 ...

Страница 16: ...ateway The sensor node gateway and software selection are 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 V Link 200gateway utilizes Ethernet communications and can be used with SensorConnect and SensorCloud althoug...

Страница 17: ... USB connection Verify the gateway status indicator is illuminated showing the gateway is connected and powered on 2 Open the SensorConnect software 3 The gateway should appear in the Controller window automatically with a communication port assignment If the gateway is not automatically discovered verify the port is active on the host computer and then remove and re insert the USB connector Figur...

Страница 18: ...ic Node Discovery on Same Frequency If the base and node are on the same operating frequency the node will populate below the Base Station listing when powering on the V Link 200 Figure 10 Node Discovered On Same Frequency 3 4 2 Automatic Node Discovery on Different Frequency If a red circle with a number appears next to the Base Station the node is operating on a separate radio channel Select the...

Страница 19: ...V Link 200 User Manual Figure 11 Node On Other Frequency Highlight the new node being added and select Move Node to Frequency Figure 12 Move Node 19 ...

Страница 20: ...elect Add Node Figure 13 Add Node By Address If the node was successfully added two confirmation messages will appear and it will be listed under the Base Station Figure 14 Add Node Confirmation If the node failed to be added a failure message will appear This means the node did not respond to the base station which could indicate the node is not in idle mode or it may be on another frequency If A...

Страница 21: ...anual channel entered but it is likely there will be a communication error If the node was not in idle move the base station to the frequency of the node and issue a Set to Idle command Figure 15 Failure to Add Node 21 ...

Страница 22: ...V Link 200 User Manual 22 ...

Страница 23: ... of node being used For this example the V Link 200 tester board is on channel 1 1 Select Hardware Input Range for channel 1 select 2 mV from the drop down menu 2 Under Hardware Offset select Balance Target for channel 1 select Mid 50 from the drop down menu 3 Select Auto Balance When auto balance is complete a blue information window will indicate the balance result Figure 16 Auto Balance 4 Selec...

Страница 24: ...uge Factor 2 d Gauge Resistance 1000 e Shunt Resistance 499000 7 Select Start Shunt Cal for Slope and Offset calibrations 8 Select Accept Calibration Figure 18 Channel Settings 9 When the calibration is complete the Wireless Node Configuration window will appear 10 Select Apply Configuration to write to node memory Figure 19 Node Configuration 24 ...

Страница 25: ...e To sample multiple nodes as a group select the Base Station and then the Sampling Network tile As a group they will all be set to the same sampling mode When the Base Station is selected all the nodes will appear in a list with a check mark to the left all of the nodes checked off will be included in the sampling Uncheck the nodes to be excluded from the sampling 25 ...

Страница 26: ...ct Synchronized if either low latency or the lowest possible power at slow sample rates is required l Lossless The user can achieve near lossless data collection in most environments through the use of data buffering radio acknowledgments and retransmissions Each node buffers collected data and timestamps to an internal 2 Mbit FIFO buffer For each transmission data is pulled from this buffer Upon ...

Страница 27: ...y the node Selecting lower resolution data will require fewer transmissions and lower power Selecting Float will request the node send data in the configured calibration unit type l Log Transmit Select Log Only to have the node store all collected data to flash memory for later download Select Transmit Only to have the node transmit all data while it is collected Or select Log and Transmit to have...

Страница 28: ...rrent reading This format provides an easy way to organize many sensors and networks and it allows the information to be displayed in the most appropriate layout Figure 21 Viewing Data 4 1 2 Navigating Graphs Use the mouse along with the shift and control keys inside the graph window to adjust the data view Control Action Mouse wheel Zoom in out on x axis Shift mouse wheel Zoom in out on y axis Mo...

Страница 29: ...it in the Channels and Settings left sidebar menu Under Channels the channel s for the widget can be enabled and disabled Figure 22 Widget Settings Menu 4 1 4 Time Series Widget Menu The Time Series Widget menu has two features to help optimize sensor data collection for export to a csv file Snap to Latest captures the most recent data and Zoom isolates specific events from a larger data sample se...

Страница 30: ...ata locally to internal memory for future upload to the host computer or SensorCloud Basic SensorCloud services are available to all users free of charge at http www sensorcloud com 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 tool...

Страница 31: ...ce 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 accessing user email and reviewing billing information CSV Uploader The data upload feature enables data from any source such as non Ethernet LORD Sensing gateways or t...

Страница 32: ...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 FFTs and more Figure 28 MathEngine View MathEngine interfaces with the SensorCloud graphing view for faster processin...

Страница 33: ...igure 28 MathEngine View Figure 29 FFT Graph in SensorCloud For more information about SensorCloud features and navigation refer to the SensorCloud website http www sensorcloud com or contact LORD Sensing Technical Support 33 ...

Страница 34: ...nting tabs on the node with holes for fastening A DIN rail clip and three screws are included with the V Link 200 for optional DIN rail mounting Figure 31 DIN Rail Mount Option The node can be mounted in any orientation but it is recommended that it is mounted in a way that optimizes wireless communications typically with the antenna pointing upward For more information see Optimizing the Radio Li...

Страница 35: ...V Link 200 User Manual Figure 31 DIN Rail Mount Option 35 ...

Страница 36: ...ounting 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 l Minimize Radio Frequency Interference RFI from other wireless devices especially those operating in the same frequency range This includes other nodes and 2 4 GHz WIFI r...

Страница 37: ...re menu and is highly dependent on the physical environment surrounding the devices 1 Select the node name Range Test Figure 32 Range Test Menu 2 RSSI is a measure of signal strength between the node and the base station A higher RSSI value closer to zero will result in better node to base station communication Reliable communication can be achieved with a signal strength greater than 75 dBm in th...

Страница 38: ...nk 200 For interfacing with sensors outside of these parameters or not included in the examples in the following sections contact Technical Support see Technical Support on page 87 Sensor Impedance l Differential sensor inputs using a Wheatstone Bridge must have an impedance that is 120 Ω For half bridge and quarter bridge configurations the node impedance value is set to match the sensor when the...

Страница 39: ...tem ground only at one end to avoid ground loops For sensitive small voltage signals such as strain gauges sensor wire leads should be of matched lengths so the lead resistance for each connection is as close to the other as possible For long lengths of wire a system calibration is recommended over a sensor calibration See Sensor Calibration on page 55 39 ...

Страница 40: ...n also be limited by selecting low resource sampling modes and low duty sampling rates which automatically switch the node excitation voltage off after sampling This feature can also be utilized to turn switches on and off to further control resource use See Using the Excitation Output as a Switch on page 51 External battery holders and ruggedized outdoor housings that accommodate larger batteries...

Страница 41: ...olding and tinning them may be useful to provide more area for the terminal screw to make contact Failure to provide adequate connection may result in erroneous data Node Pin Number Signal Node Pin Number Signal 1 SP 16 SP 2 S1 17 S4 3 S1 18 S4 4 GND 19 GND 5 S1 S 20 S4 S 6 SP 21 Ain5 7 S2 22 GND 8 S2 23 Ain6 9 GND 24 GND 10 S2 S 25 Ain7 11 SP 26 GND 12 S3 27 Ain8 13 S3 28 GND 14 GND 29 Vin 15 S3 ...

Страница 42: ...Positive input to the node programmable gain amp lifier PGA Used with S input 0 to 5 V dc including gain and offset Wheatstone Bridge com patible sensor with 120 Ω input impedance recom mended Sx Differential sensor input Negative input to the node programmable gain amplifier PGA Used with S Sx S Three wire input Used only for three wire configuration of quarter bridge strain gauge bridges Leave u...

Страница 43: ...gital A D converter over the 5 V dc range The resolution of the sensor measurement is dependent on the operating range of the sensor If the application is such that only a small portion of the 5 V dc range is being utilized better resolution can be achieved by increasing signal amplification and by zeroing the sensor baseline in the appropriate offset biasing range Sensor gain and offset values ar...

Страница 44: ...ers as well as some soil moisture temperature and other sensors For use with the V Link 200 sensors with an impedance of 120 Ω are recommended Calibration in the SensorConnect software for these devices varies depending on the type of sensor and includes using the shunt calibration for strain gauges The following diagrams show how to connect these types of sensors Note Full Bridge is the standard ...

Страница 45: ...V Link 200 User Manual Figure 36 Half and Quarter Bridge Wiring 45 ...

Страница 46: ...below Input Range Gain Slope Offset 156 mV 16 0 0012207031 156 25 78 1 mV 32 0 0006103516 78 13 39 0 mV 64 0 0003051758 39 06 19 5 mV 128 0 0001525879 19 53 9 76 mV 256 0 0000762939 9 77 4 88 mV 512 0 0000381470 4 88 2 44 mV 1024 0 0000190735 2 44 1 22 mV 2048 0 0000095367 1 22 Table 5 Raw Voltage Output The formula to derive the above raw voltage output Slope 5120mv 262144 gain Offset 5000mV 2 ga...

Страница 47: ...V or less may be better measured by biasing the sensor signal to the mid range of the node input range with a voltage divider as shown in Figure 37 Small Voltage Measurement Channel configuration will include adjusting the gain setting accordingly in the SensorConnect software Figure 37 Small Voltage Measurement 47 ...

Страница 48: ... with the node excitation voltage Alternately sensors can be powered with an external source The sensor output signal is processed in the node by an 18 bit analog to digital A D converter over the 10 24 to 10 24 V dc range The resolution of the sensor measurement is dependent on the full scale output range of the sensor More resolution can be achieved by changing the single ended channel input ran...

Страница 49: ... 200 User Manual The following sections provide examples of how various sensors can be connected to the node For other applications see Technical Support on page 87 Figure 38 Single Ended Signal Processing 49 ...

Страница 50: ... simpler allows less adjustment For applications in which very small currents will be measured the differential inputs offer better noise immunity and programmable gain settings Available gain settings vary between node models Differential inputs can be factory configured for various bridge completion and impedance values For this application the standard full bridge configuration is assumed For o...

Страница 51: ...as a Switch At low sampling rates under 32Hz the node automatically switches the excitation voltage output off when the sensor is not being sampled in order to conserve battery life This feature can also be used in applications where a switch is desired such as for turning sensor power on and off when the sensor is powered by the node but has a large current draw It can also be used as a general p...

Страница 52: ... 40 Connecting a Thermocouple Thermocouples should be calibrated by first selecting the appropriate baseline offset range output range or gain and then applying know loads and calculating the slope and offset values Using water as the known load medium submerging the thermocouple in ice and hot water baths is a simple method that can be used for calibration Figure 40 Connecting a Thermocouple 52 ...

Страница 53: ...additional information on LORD Sensing accelerometers compatible for use with the V Link 200 see Recommended Sensors on page 89 For information on integrating other types of sensors not described in this manual contact Technical Support see Technical Support on page 87 6 12 On board Temperature Sensor l The V Link 200 has an on board solid state temperature sensor mounted on the surface of the cir...

Страница 54: ...conversions External sensors can be attached to any channel that is suitable for sensor type Table 7 Example External Sensor Types describes example sensors units and calibration options channel type example external sensors units calibration options analog differential input strain gauges in full half quarter custom Wheatstone Bridge configurations strain volts A D value custom shunt calibration ...

Страница 55: ...rated device is then plotted against the measured output of the sensor to determine the calibration slope and offset In SensorConnect this can be accomplished by taking sensor readings while applying the known loads Sensor wiring tolerances in system electronics and differences in mounting techniques are examples of systemic variables that can influence the sensor readings Sensors that are making ...

Страница 56: ... The known load value from the reference device is then plotted against the measured output of the sensor to determine the calibration slope and offset In SensorConnect this can be accomplished by taking sensors readings while applying the known loads 56 ...

Страница 57: ...y of the gauge volts strain DESIRED OUTPUT engineering units microstrain PROCEDURE 1 Open SensorConnect and establish communication with the gateway and node See System Operation on page 14 2 Select Hardware Input Range for channel 1 select 2 mV from the drop down menu 3 Under Hardware Offset select Balance Target for channel 1 select Mid 50 from the drop down menu 4 Select Auto Balance When auto ...

Страница 58: ...al b Number of Active Gauges Typically full bridge is 4 half bridge is 2 and quarter bridge is 1 For this example Number of Active Gauges is 4 c Gauge Factor Is a specification from the gauge For this example Gauge Factor is 2 d Gauge Resistance Is a specification from the gauge For this example Gauge Resistance is 1000 e Shunt Resistance 499000 8 Select Start Shunt Cal for Slope and Offset calibr...

Страница 59: ...V Link 200 User Manual 10 When the calibration is complete the Wireless Node Configuration window will appear 11 Select Apply Configuration to write to node memory 59 ...

Страница 60: ...ge SENSOR TYPE load cell SENSOR PARAMETERS application voltage range 2 mV This is the expected output voltage of the sensor based on the range of force being measured in the application and the sensitivity of the sensor V engineering units DESIRED OUTPUT engineering units EU force lbs PROCEDURE 1 Open SensorConnect and establish communication with the gateway and node See System Operation on page ...

Страница 61: ...alibration 6 Use the following settings a Slope 1 b Offset 0 c Units Bits 7 Select Apply Configuration When the settings have been applied a green pop up window will confirm the process is complete Figure 45 Node Configuration Menu 61 ...

Страница 62: ...g Transmit Transmit Only Figure 46 Channel Settings 11 Select Apply and Start Network 12 Select the Quick View Dashboard pop up window to view sampling 13 After making all measurements calculate a slope from the data using the formula y mx b in a data analysis program such as Microsoft Excel See Calculating a Linear Slope on page 69 14 Return to the Wireless Node Configuration screen for the senso...

Страница 63: ...value in the stream graph If the value is not at zero return to the Wireless Node Configuration menu and adjust the offset by increasing or decreasing the value 18 Once the offset has been zeroed verify the calibration by applying known loads on the sensor throughout the load range observing and verifying the measurement in engineering units 63 ...

Страница 64: ... the manufacturer full scale output FSO value needs to be scaled to 3V 4 096 V 10 V 86 07 mV 35 25 mV Select a gain and offset scale value appropriate for the sensor See Differential Input Gain and Offset on page 71 The closest gain setting that accommodates 35 25 mV is 39 0 mV Using a lesser value would exceed the input voltage capacity of the node when the sensor is at higher pressures For more ...

Страница 65: ...surement unit conversion values the only difference being the use of a traceable reference Calibration can be used to account for the variations between individual sensors wiring system electronics sensor mounting and environmental conditions The conversion values include the slope offset gain scale and formula for converting the sensor A D value bits to engineering units The bits are the digital ...

Страница 66: ...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...

Страница 67: ...nputs and gain amplifiers Hardware 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 b in y mx b Anti Aliasing Filter A filter applied before the digitization of the analog signal Figure 49 Advanced Conversion Values Menu 67 ...

Страница 68: ... the sensor no load measurement will be placed in the middle of the range providing 50 of the range for positive readings and 50 of the range for negative readings Once the scale level is selected the Auto Balance procedure is used to assign the actual sensor no load measurement to the designated scale l Low is for positive going signals zero at 25 of total range l High is for negative going signa...

Страница 69: ...icients see Sensor Calibration on page 55 Here is an example using Excel 1 Open a blank spreadsheet 2 Enter the A D value bits measurements and applied load in the desired engineering units in two columns Enter A D value in the left column x axis value and the applied load in the right y axis value 3 From the Insert menu select Chart Scatter Select the preferred format Figure 51 Generate a Scatter...

Страница 70: ...sents the linear ratio x is the A D value at a given point and b is the fixed zero load offset of the sensor Enter the slope and offset as the conversion values for the sensor channel under the applicable engineering units In this example enter 0 1338 for the slope and 282 36 for the offset for the units conversion values on the measured channel Figure 53 Slope and Offset Values 70 ...

Страница 71: ...the node Offset Scale The scale setting positions the no load measurement of the connected sensor within the 0 to 5 V range of the node input The range of A D counts that corresponds with the 0 to 5 V node input depends on the resolution of the node An 18 bit node will have a full scale bit range of 262144 A mid range setting positions the baseline offset in the middle of the range 2 5 V or full s...

Страница 72: ...al range of a sensor that would work with that gain without considering the offset setting Gain Scaled input range 16 156 mV 32 78 1 mV 64 39 0 mV 128 19 5 mV 256 9 76 mV 512 4 88 mV 1024 2 44 mV 2048 1 22 mV Table 8 Differential Gain Values Coefficients for Conversion to Volts Slope 5 12 2 18 gain Offset 5 0 2 gain assuming balance to mid scale is perfect 72 ...

Страница 73: ...personal injury and permanent damage to the node see Safety Information on page 96 The V Link 200 is susceptible to damage and or disruption of normal operation from Electrostatic Discharge ESD ESD may cause the device to reset which may require user intervention to continue data acquisition The electronics within the node are sensitive to moisture and static Do not touch the internal circuitry or...

Страница 74: ...the node will not power the batteries may need to be replaced For more information on replacing the batteries See Replacing Batteries on page 96 Node battery life is highly dependent on the type of sensor connected as well as operational parameters such as sample mode and rate More active channels and higher sample rates equate to decreased battery life 74 ...

Страница 75: ... be directly powered by a regulated AC to DC power supply with the appropriate output parameters see Operating Specifications on page 93 It can also be powered by an external battery or other regulated DC supply The supply must deliver a stable voltage between 7 5 to 36 V dc and be capable of sourcing at least 100 mA External power is applied through the terminal block connector Observe connection...

Страница 76: ...V Link 200 User Manual 9 Troubleshooting 9 1 Troubleshooting Guide 76 ...

Страница 77: ...pport on page 87 2 COMMUNICATION no communication to the gateway or node 2 1 node or gateway has no power 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 po...

Страница 78: ...e 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 Sensing Technical Support See Technical Support on page 87 3 DATA ACQUISITION sensor dat...

Страница 79: ...onnections contact LORD Sensing Technical Support See Technical Support on page 87 3 5 sensor channel not configured correctly Verify that the sensor is configured on the correct channel and has been enabled for data acquisition 3 6 sensor calibration is invalid 79 ...

Страница 80: ...ee Parts and Configurations on page 88 for configuration options and part numbers Each is configurable to emulate full half and quarter bridge strain gauges Table 9 Tester Board Configuration describes the strain gauge load settings available This setting must match the type of node channel that is being tested For example if the node is a quarter bridge node the setting on the tester board must b...

Страница 81: ...ed as needed 1 Set the jumpers for Full Bridge operation using a small flat head screw driver to fully push the switch into the desired position 2 Verify the node is powered off and unplugged 3 Plug the node tester board into the node Channel 1 position Figure 56 Node Tester Board Installation 4 If not already completed set up the Wireless Sensor Network equipment and install the SensorConnect sof...

Страница 82: ...get for channel 1 select Mid 50 from the drop down menu 8 Select Auto Balance When auto balance is complete a blue information window will indicate the balance result Figure 57 Auto Balance 9 Select Calibration 10 Select Microstrain from the Unit drop down menu select the Shunt Cal button enabled on the right Figure 58 Node Configuration Menu 82 ...

Страница 83: ...plete the Wireless Node Configuration window will appear 15 Select Apply Configuration to write to node memory 16 In the Wireless Node Configuration window select the Node heading and then select Sampling 17 From the Wireless Network menu select the drop down menu for channel 1 under Sampling uncheck Continuous streaming and check For to select a duration of 10 seconds using the arrows to the righ...

Страница 84: ... Testing is complete Figure 61 Node Tester Output Stream 9 3 Updating Node Firmware Under the recommendation of LORD Sensing Technical Support Engineers nodes can be upgraded to the latest available firmware to take advantage of new features or correct operating issues SensorConnect version 5 0 0 or greater can be used to update any mXRS or LXRS node or gateway firmware to the most current version...

Страница 85: ...ile into a folder on the computer Verify there is a file with a zhex extension 3 Launch SensorConnect and establish communication between the node and gateway as normal 4 Select the Node address Upgrade Firmware select Browse select the Firmware Upgrade file Start Upgrade 85 ...

Страница 86: ... by LORD Sensing Warranty Repairs LORD Sensing warrants its products to be free from defective material and workmanship for a period of one 1 year from the original date of purchase LORD Sensing will repair or replace at its discretion a defective product if returned to LORD Sensing within the warranty period This warranty does not extend to any LORD Sensing products which have been subject to mis...

Страница 87: ...nical Support sensing_support LORD com Phone 802 862 6629 Fax 802 863 4093 9 00 AM to 5 00 PM Eastern Time US Canada SKYPE microstrain wireless support Live Chat is available from the website during business hours 9 00 AM to 5 00 PM Eastern Time US Canada 9 5 Maintenance The replaceable batteries are the only user serviceable parts in the V Link 200 For instructions on how to change the batteries ...

Страница 88: ...dge completion on one or more differential channels l 120Ω 350Ω or 1000Ω quarter bridge completion on one or more differential channels l High g force option Node operates in gravitational forces in excess of 550 g 10 2 Node Accessories The following parts are available for use with the V Link 200 For the most current product information custom and OEM options not listed below refer to the LORD Se...

Страница 89: ...e from LORD For help with other sensor applications see Technical Support on page 87 Model Description LORD Sensing Part Number ACCEL TRIAX 50 Triaxial Accelerometer 50g 6402 0320 ACCEL TRIAX 100 Triaxial Accelerometer 100g 6402 0120 ACCEL TRIAX 200 Triaxial Accelerometer 200g 6402 0220 ACCEL TRIAX 500 Triaxial Accelerometer 500g 6402 0420 Table 11 LORD Sensing Sensors 89 ...

Страница 90: ... Gateway 6307 1040 WSDA BASE 102 RS232 Serial Output Gateway 6307 1020 WSDA BASE 101 Analog Output Gateway 6307 1010 G Link LXRS Wireless Accelerometer Node various models G Link2 LXRS Wireless Accelerometer Node various models SG Link LXRS Wireless 2 Channel Analog Input Sensor Node various models SG Link OEM Wireless 2 Channel Analog Input Sensor Node various models SG Link RGD Ruggedized Wirele...

Страница 91: ...ing 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 Canada 91 ...

Страница 92: ...sions 128 8 mm x 82 5 mm x 31 0 mm Weight 283 grams with batteries 217 without batteries Enclosure Environmental Rating General purpose indoor IP67 NEMA4X Enclosure Dimensions 177 8 mm x 127 mm x 152 4 mm Mounting 4 x 8 32 UNC 2B Weight 1347 5 grams with 3 D cell batteries 92 ...

Страница 93: ...modes Synchronized low duty cycle datalogging event triggered Sampling rates Continuous sampling 1 sample hour to 4 KHz Periodic burst sampling 32 Hz to 8 KHz Sample rate stability 5 ppm Network capacity Up to 127 nodes per RF channel depending on settings See http www microstrain com configure your system Synchronization between nodes 50 μsec Operating Parameters Wireless communication range Outd...

Страница 94: ...rogrammable from 4 dBm 2 5 mW to 16 dBm 40 mW A low transmit power option is available for use in Europe and elsewhere and is limited to 10 dBm 10 mW FCC ID XJQMSLINK0004 IC ID 8505A MSLINK0004 This device complies with Part 15 of the United States FCC Rules and Industry Canada s license exempt RSSs Operation is subject to the following two conditions 1 This device may not cause interference and 2...

Страница 95: ...e 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 Manually matching the node and gateway frequency channels is 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...

Страница 96: ...on The positive polarities are indicated on the batteries and the node by a symbol 3 Reassemble Figure 62 Replace Batteries 12 2 Battery Hazards The V Link 200 contains internal non rechargeable lithium batteries Lithium batteries are a fire and explosion hazard Do not store or operate the node at temperatures above 212 F 100 C Do not disassemble short circuit crush puncture or otherwise misuse th...

Страница 97: ...to do so could result in personal injury and permanent damage to the device 12 4 Disposal and Recycling The V Link 200 contains internal batteries printed circuit boards and electronic components These items are known to contain toxic chemicals and heavy metals that are harmful to humans health and the environment Disposal is subject to federal and local laws Do not discard the device or batteries...

Страница 98: ... SensorCloud Pricing http sensorcloud com pricing MathEngine Overview http www sensorcloud com mathengine SensorConnect Overview Download http www microstrain com software sensorconnect LORD Sensing Wireless Sensors Network Software Development Kit https github com LORD MicroStrain SensorCloud Product Datasheets http www microstrain com wireless sensors Product Manuals and Technical Notes http www...

Страница 99: ...g how it is set up for data acquisition It includes settings such as sampling mode rate number of active channels channel measurement settings offsets hardware gain and calibration values Continuous Sampling a mode of operation in which the node is sampled continuously until stopped or sampled continuously for a fixed amount of time Coordinated Universal Time UTC the primary time standard for worl...

Страница 100: ...ving antennas in a radio network As stated it means the antennae are in view of each other with no obstructions LXRS Lossless Extended Range Synchronized is the proprietary LORD Sensing data communications protocol used in the wireless sensor network Node The node is the wireless transceiver to which the sensor s is connected providing communication with the gateway The G Link LXRS V Link LXRS and...

Страница 101: ...tions 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...

Страница 102: ...ckets second Transmission window the time allowed for one data transmission at the automatically determined transmission rate USB Universal Serial Bus is 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 102 ...

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