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V-Link® User Manual

1. 46 5 225 RS Pe REE Ce deci a LA e M n 47 DATALOGGING MEMOR Y e EX 48 FACTORY CALIBRATION AND TESTING z cccccccccsccccccccccccccccccccccccccccccccccccccccccccccccccccccecees 49 ___ __6_ _ 49 __ ____ __ __ 49 255 50 MECHANICAL DRAWINGS 52 5 52 CIRCUIT BOARD ASSEMBLY DIMENSIONS 5220 aed ea Ead e Ma ee e oec 53 ELECTRICAL BLOCK DIAGRAM z e e 54 VIEUX Pr 55 STAND AR DOR RER ____________ _ t dd 55 SYTEM REQUIREMENTS e nier cuf 55 SOFTWARE INSTAL ATON oi edo Loreto sod t Cris cores 55 DATA COMMUNICATIONS UR pauUo vet ves
2. 34 NODE ADDRESSING 35 SAMPLE DURA PION CALCULATIONS 36 LIME STAMPING 37 eiusd adde 38 38 INTERNALD BATTERY uu Eas tas tuto uses Rs 38 BYPASSING THETNTERNAL BATTERY 05 39 POW ER EROP E 52 65 ony re da an Ebrei b ton s 40 STANDARD ENCLOSURE ieiunio e onion aoo do onec ido Cac ouai o 41 OPTIONAL RNG OSU RES 42 44 OPERA TING TEMPERATURE eco eto ioci toti eto quaere oue eio oe oe Cetus 45 SAMPLING RATES coo duco o oe Deco oco Eo e c ioco E eoe 46 MicroStrain Inc 6 nett 46 SANIA I E EEATT EA te ens bah ies TNE ca headed Sahn gt 46 Ge ie
3. cccccccccccccccccccccccccccccccccccccccccccccccecces 78 APPENDIX 7 ATTACHING 79 MicroStrain Inc Welcome Welcome to MicroStrain We make tiny sensors that are used in a wide range of applications including knee implants civil structures advanced manufacturing unmanned military vehicles and automobile engines Our sensors have won numerous awards and we pride ourselves on being both innovative and responsive to our customer s unique requirements MicroStrain is based in Williston Vermont and is a privately held corporation Founded in 1987 our early development focused on producing micro displacement sensors for strain measurement in biomechanics research applications Our first sensors were designed for arthroscopic implantation on human knee ligaments since then we expanded our product line through continual product improvement We introduced a broader line of micro displacement sensors that could withstand extreme temperatures hundreds of millions of cycles and complete submersion in saline The aerospace and automotive industry found our sensing systems met their requirements and we ve worked on many groundbreaking projects As our customer base expanded we continued to innovate by combining multiple sensors along with advanced micro controllers to enhance system performance We were one of th
4. 55 2202 2 57 ONER 57 57 MEI P dU 57 etate die ene MA ME 57 SrA gd 57 58 SODA RETURN POLIC Y 5 eite 59 TERMS AND CONDITIONS ___ ____ _6_ __ 60 APPENDIX 1 HOST TO BASE STATION COMMUNICATION cccccccccccccccccccccccccccccccccces 66 SPP TTE 6 66 66 APPENDIX 2 DATALOGGING WITH AGILE LINK 58 67 APPENDIX 3 STREAMING WITH AGILE LINK SOFTWARE 69 APPENDIX 4 LOW DUTY CYCLE WITH AGILE LINK SOFTWARE eee ee eee eee rennen one 71 APPENDIX 5 HIGH SPEED STREAMING WITH HIGH SPEED STREAMING SOFTWARE 77 APPENDIX 6 BRIDGE COMPLETION RESISTORS
5. computer via a USB or an RS 232 6 connection and 15 operated with MicroStrain s Agile Link software The Analog base station under instruction from the software wirelessly communicates with the Agile Link nodes alternately sending commands and configurations and receiving responses and data The Analog base station sends all of the commands available to the nodes including ping datalog stream data erase read and write EEPROM etc The 17 MicroStrain Inc Analog base station in turn receives acknowledging responses from the nodes and passes datalogging downloads streaming data high speed streaming data and low duty cycle data to the host computer The Analog base station is capable of maintaining communications with multiple nodes Its broadcast mode allows the simultaneous issuance of several commands to multiple nodes The Analog base station also features direct analog output of wireless node data on its back panel and is deployable in a stand alone condition without need of host computer Serial Base Station The MicroStrain Serial base station 15 a transceiver which provides a communication link between a host computer and the Agile Link family of wireless nodes including V Link SG Link G Link and TC Link The Serial base station employs a 2 4 GHz radio with 16 selectable channels to communicate with the remote nodes The Serial base station is connected to a host computer via an RS 232 co
6. A rule of thumb would be to expect at least 500 recharges from fully depleted to full charge before discharge capacity begins to drop The internal battery should only be charged with the Phihong brand external power supply Model 5 05 090 http www phihong com assets pdf PSAO5R pdf provided in the V Link starter kit The power supply is a switching supply and may receive an input from 100 to 240 Volts AC It outputs 9 Volts DC A set of 4 plug adapters are provided to accommodate most countries electrical services The V Link should be fully charged before each use Charging may take up to several hours depending on battery depletion Charging procedure e Turn off the V Link On Off Switch e Insert external power supply male connector into the V Link barrel connector e Insert power supply into wall or other electrical service e Observe that the red Charging LED illuminates If it does not remove the external power supply male connector and re insert it into the V Link barrel connector until the red Charging LED illuminates Please see the LEDs section of this manual for more details e Charging has completed when you observe that the red Charging LED turns off and the green Charge Complete LED illuminates e Remove external power supply male connector e Turn on the V Link On Off Switch e Note The V Link should normally be operated with the external power supply disconnected and therefore not charging
7. We are open 24 X 7 through our web portal We make every attempt to respond to your email the same business day We are always available by telephone during business hours We provide in depth FAQs manuals quick start guides and technical notes Firmware and software upgrades are made available on line as they become available e Code samples in several languages are posted to aid your development e We support our customers as we would want to be supported Web Our home page is at URL www microstrain com Our support page is at URL http www microstrain com support_overview aspx Email MicroStrain s Support Engineers make every attempt to respond to emails requesting product support within the same business day The more detail you can provide the quicker we will be able to understand your issues and find solutions Data files pictures screen grabs etc are all very helpful in generating a well thought out solution Please email us at support microstrain com Telephone MicroStrain s Support Engineers are available by phone Monday through Friday 9 00AM to 5 00PM local time When calling MicroStrain indicate to the receptionist that you calling for product support and you will be promptly routed to a Support Engineer Please have your equipment ready to test Every attempt will be made to solve issues while you are on the line 1 800 449 DVRT 3878 Toll Free 1n US 1 802 862 6629 telephone 1 802 863 4093 fax Loca
8. samples per channel per second to 2048 samples per channel per second Sensor data is written to memory on the node as it is sampled no transmission occurs to the base station After the datalogging session has completed data is downloaded and saved to file by Agile Link software Analysis 1s conducted thereafter on the resulting data files Please review the Sampling Rates section of this manual for sampling rate details Operating one node in datalogging mode A datalogging session should be started by setting your configuration Establish communication with the node and right click to get the drop down menu Click Configure The Configuration window will appear Click the Channels tab Check boxes to enable V Link s channels 1 2 and 3 Uncheck boxes 4 5 6 7 and 8 to disable these channels Leave the Offset scroll boxes for channels 1 2 and 3 at the default value of 512 mid scale Leave the Hardware Gain text boxes for channels 1 2 and 3 at the default value of 210 Click Apply Click the Datalogging tab Uncheck box for Continuous Datalogging Uncheck box for Enable Sensor Event Driven Trigger Enter the value 1000 into the Sweeps scroll box Enter the value 256Hz in the Sample Rate drop down Note that a datalogging session of approximately 3 9 seconds has been set Click Apply Click OK Click View in the menu bar Click Channel Actions The Channel Actions windows will appear Click the Resync button Channels 1 2 and
9. 2 5 x 4 5 x 3 V LINK IP65 XL ENCL IP65 NEMAZ rated high strength fiberglass enclosure with non rechargeable 3 6V Lithium D cell battery Dimensions 2 94 x 2 18 x 6 3 V Link IP65 XXL ENCL IP65 NEMA4 rated high strength fiberglass enclosure with 3 parallel non rechargeable 3 6V Lithium D cell batteries Dimensions 2 2 x 4 4 x 6 8 Table 3 MicroStrain Inc 6313 7000 V LINK IP67 ENCL V LINK IP67 ENCL IP67 rated enclosure with 3 6V lithium AA battery 6313 7010 V LINK IP67 A V LINK IP67 A A connector for V LINK IP67 ENCL 6313 7020 V LINK IP67 B V LINK IP67 B B connector for V LINK IP67 ENCL 6313 7030 V LINK IP67 TOOL V LINK IP67 TOOL crimp tool for IP67 enclosure connectors AGILE LINK AGILE LINK AGILE LINK Software for use with AGILE LINK family of wireless sensors 6302 3000 HIGH G OPTION HIGH G OPTION modify wireless nodes to operate in excess of 550 g Install high g crystals pot entire assembly and install internal antenna 65 pair of magnetic mounting strips for use with the wireless IP65 enclosures ACCEL TRIAX 3031 50 Triaxial Accelerometer 50 full scale range 0 75 x0 75 x1 0 6402 402 0110 ACCEL TRIA X 3031 100 ACCEL TRIAX 3031 100 Triaxial Accelerometer 1002 full scale range 0 75 x0 75 x1 0 6402 0210 ACCEL TRIAX 3031 200 ACCEL TRIAX 3031 200 Triaxial 6402 0410 ACCEL TRIAX 303 1 500 6313 6010 CHARGER A INT Accele
10. 3 will now have the Strain action in place indicating that the V Link will output engineering units in microstrain Click the small red X in the upper right corner of the Channel Actions window to close the window Right click on the node icon label and a pop up menu will appear Click Datalogging Click Erase A confirming message box will appear Click Yes A progress bar will appear and disappear This indicates that the datalogging memory of the node was successfully erased Right click on the node icon label and a pop up menu will appear Click Datalogging Click Trigger Session A progress bar will appear and disappear This indicates that a datalogging session was successfully triggered Right click on the node icon label and a pop up menu will appear Click Datalogging Click Download A progress bar will appear and disappear This indicates that all datalogging sessions were successfully downloaded 67 MicroStrain Inc Note Any number of datalogging sessions can be run consecutively before downloading Please review the Datalogging Memory section of this manual for capacity details Right click on the node icon label and a pop up menu will appear Click Datalogging Click Browse Triggers The Trigger Browser window will appear Click the sign to the left of the trigger label example July 20 2007 09 36 07 and Trigger will appear Highlight Trigger 1 and click the Open Trigger The data in Trigger will be displayed i
11. In case the return policy period has expired and the Product 18 within warranty the customer shall submit a claim to MicroStrain as follows 1 The customer must submit with the Product as part of the claim a written description of the Product defect or Software nonconformance in sufficient detail to allow MicroStrain to confirm the same 11 The original Product owner must obtain a Return Material Authorization number from MicroStrain and if requested by MicroStrain provide written proof of purchase of the Product such as a copy of the dated purchase invoice for the Product before the warranty service is provided After RMA number is issued the defective Product must be packaged securely in the original or other suitable shipping package to ensure that it will not be damaged transit and the RMA number must be prominently marked on the outside of the package Do not include any manuals or accessories the shipping package MicroStrain will only replace the defective portion of the Product and will not ship back any accessories 1v The customer is responsible for all in bound shipping charges to MicroStrain No Cash on Delivery is allowed Products sent COD will either be rejected by MicroStrain or become the property of MicroStrain Products shall be fully insured by the customer MicroStrain will not be held responsible for any packages that are lost 1n transit to MicroStrain The repaired or replace
12. MicroStrain Inc that appear on MicroStrain s website or in product literature or in manuals are the property of their respective owners who may or may not be affiliated with connected to or sponsored by MicroStrain Inc 65 MicroStrain Inc Appendix 1 Host to Base Station Communication RS 232 Communication between the Serial base station or the RS 232 interface of the Analog base station and the host computer is via a standard RS 232 connection as shown in the RS 232 Signals Definition and RS 232 Asynchronous Character Format tables RS 232 Signals Definition Transmit Data Host to Base Station Asynchronous Serial Data from Host Asynchronous Serial Data to Host Signal Ground Signal Ground Reference RS 232 Asynchronous Character Format Data Bits 8 0 USB 2 0 Communication between the USB base station or the USB interface of the Analog base station and the host computer 15 via a USB 2 0 compliant connection using a Silicon Laboratories CP2101 USB to UART Bridge chip on the base station supported by Silicon Laboratories Virtual Communications Port VCP drivers installed on the host PC Reference is made to the following Silicon Laboratories documents CP2101 Single Chip USB to UART Bridge Product Brief CP2101 Data Sheet 66 MicroStrain Inc Appendix 2 Datalogging with Agile Link software Datalogging Datalogging allows you to sample each sensor each channel on a node from 32
13. Nations Convention on Contracts for the International Sale of Goods is specifically disclaimed 18 Force Majeure Except for the obligations to make payments neither party shall be bound to meet any obligation if prevented from doing so as a consequence of force majeure If a situation of force majeure lasts for more than ninety 90 days the Parties 64 MicroStrain Inc shall be entitled to terminate this Agreement by canceling it in writing without any rights to compensation of damages or refunds 19 No Assignment This Agreement and any Licenses or the Software may not be assigned sublicensed leased sold or otherwise transferred without prior written consent from MicroStrain and any unauthorized transfer is null and void This agreement and any licenses granted is personal to you and can be used for personal or internal business use only and may not be used on behalf of a client or customer 20 Notice All notifications and communications relating to this Agreement shall be made by the parties to the other party in writing and shall be signed by a person duly authorized to provide such notice 21 Entire Agreement This Agreement shall constitute the entire Agreement between buyer and MicroStrain and shall not be modified or rescinded except in writing signed by buyer and MicroStrain The provisions of this Agreement supersede and precede all prior oral and written quotations communications agreements and understandings
14. a different frequency Configure each node individually for a streaming session as described in the Operating one node in streaming mode section above Normally all nodes would be set to the same sweep rate channel actions etc for any given session but there is no requirement to do this Hold down the SHIFT key and click each node once to highlight it Release the SHIFT key Make sure that only nodes are highlighted not base stations Right click on any of the highlighted nodes and a drop down menu appears Click Stream and the nodes will begin streaming data to separate graphs When the streaming ends move your mouse pointer within the black area of each Real time Graph Right click and a pop up menu will appear Click Save Stream A Save As dialog box appears Accept or modify the File Name for the CSV file that will be saved Click Save The dialog box will disappear This indicates that the streaming data was successfully saved to file on your PC Do the same for each node graph 70 MicroStrain Inc Appendix 4 Low Duty Cycle with Agile Link software Low Duty Cycle Low Duty Cycle LDC allows you to sample each sensor each channel on a node from 500 Hz to 1 sample per hour Sensor data 15 blipped to base station and collected displayed and saved by Agile Link software in real time Please review the Sampling Rates section of this manual for sampling rate details Operating one node in LDC Low Duty Cycl
15. all nodes being captured are displayed LA Real Time Graph Data Collector Node 245 Timer Tick Sample Rate Node 259 Timer Tick Sample Rate Node 362 Timer Tick Sample Rate Node 531 Timer Tick Sample Rate Timer Tick Sample Rate C Monitor for any node y Data View Channel 1 Channel 2 Chanr 2045 bits 117 1Hz 1 55758 us 200 1 Hz 2052 bits 200 1Hz 4034 200 1 Hz 2054 bits 200 1 Hz Channel 4 Channel 5 0 020496 Channel 3 Channel 6 0 023424 2061 bits 2036 bits 2041 bits 4093 bits 4094 bits 4094 bits Click Graph View and the graphing window appears Click the nodes you want to graph in the Available Nodes frame A limit of 4 graphs on screen 15 enforced A Real Time Graph Data Collector Available Nodes 2 Node 161 7 Node 245 2 Node 259 Node 362 Mode 531 Graph View C Monitor for any node Mode 161 Monitoring D z 0 10 20 30 40 50 60 70 80 90 100 110 Timer Ticks Mode 245 Monitoring 0 10 20 30 40 50 60 70 80 90 100 10 Timer Ticks Node 259 Monitoring e n3 e e e Sweep Value 50 60 70 80 90 100 110 Timer Ticks Mode 362 Monitoring 52 8 0 10 20 30 40 50 60 70 80 90 100 Timer Ticks 75 MicroStrain Inc Return to the Data View right click any
16. powered If you have a USB base station plug the USB connector into any USB port on your PC The blue LED will illuminate indicating the base station 1s powered e f you have an analog base station connect the USB cable to any USB port on your PC and to the analog base station USB connector on the back panel Connect the external power supply to the power connector on the back panel of the analog base station and plug it into a proper power receptacle Depress the red power button on the front panel and the green LED will illuminate indicating the base station 15 powered e Install the antenna on the V Link antenna connector Tighten hand tight do not over tighten Insure the V Link is turned off switch down away from cover label e Fully charge the V Link internal battery following the procedure given in Internal Battery section of this manual USB Serial Analog MicroStrain 3 Tafla Mieres ef Figure 1 3 Follow the step by step instructions in the V Link Quick Start Guide which you will find on the CD or on our web site This will get you up and running From here you will want to use the Agile Link software to familiarize yourself with all the operations of the V Link MicroStrain Inc Starter Kits Modules and Options The V Link is available in starter kits as individual modules and with options 6312 0000 6313 3000 6313 4000 6313 5000 V LINK 2400 M V L
17. recommend that you use a delivery service that can be tracked and or insured A 30 Day Return must be initiated by receiving an RMA from MicroStrain 59 MicroStrain Inc Terms and Conditions 1 Acceptance of MicroStrain Inc s Terms and Conditions By placing an order with MicroStrain Inc MicroStrain Buyer agrees to be bound by these Terms Conditions of Sale and Software License if applicable MicroStrain will not be bound by any of other terms and conditions regardless of whether Buyer tenders terms and conditions with an order or otherwise and these terms and condition of sale prevail over any conflicting or additional terms of any quote order previous agreement acknowledgment or similar communications between the parties These Terms and Conditions supersede all prior or contemporaneous oral or written communications proposals and representations with respect to its subject matter The term Products includes collectively all physical products Software and Embedded Software as defined herein 2 Pricing All prices are quoted in US dollars unless otherwise explicitly stated and are valid for ninety 90 days You shall be responsible for the payment of all shipping charges costs of freight taxes import fees insurance duties value added taxes and the like Our minimum order is one hundred 100 00 dollars excluding all additional charges including shipping taxes and the like 3 Payment
18. samples per second with 4 channels active each channel will be sampled at the rate of 1000 samples per second with 8 channels active each channel will be sampled at the rate of 500 samples per second High Speed Streaming can be finite or continuous In finite high speed streaming a sampling duration is set and the high speed streaming session will last the duration once initiated In continuous high speed streaming the high speed streaming session will last until the host software stops the session or the power is cycled on the V Link amp The data is transmitted over the air to the base station during high speed streaming no data is written to the on board memory during the session During high speed streaming the software receives the data from the base station parses caches and displays the data and provides for the data to be saved into CSV formatted files for further analysis Please review the Sampling Rates section of this manual for datalogging streaming low duty cycle and high speed streaming sampling rate details Multiple V Link s nodes and or base stations may be operated at the same time depending on the sampling method in use 14 MicroStrain Inc In the Datalogging sampling method you may trigger a datalogging session on any number of V Link s at the same instant by broadcasting a datalogging command from one base station to all the nodes In this case all nodes and the base station operate on the same fre
19. the Product and normal maintenance Damage that occurs in shipment due to acts of God failures due to power surge and cosmetic damage Any hardware software firmware or other products or services provided by anyone other than MicroStrain or Products that have been purchased from inventory clearance or liquidation sales or other sales in which MicroStrain the sellers or the liquidators expressly disclaim their warranty obligation pertaining to the Product Repair by anyone other than MicroStrain will void this Warranty 15 Copyright Statement No part of this publication or documentation accompanying any Product may be reproduced in any form or by any means or used to make any derivative such as translation transformation or adaptation without permission from MicroStrain as stipulated by the United States Copyright Act of 1976 as amended Contents are subject to change without prior notice Copyright 2007 by MicroStrain Inc All rights reserved 16 Choice of Law These terms and any agreement between MicroStrain and buyer shall be interpreted in accordance with the substantive laws of the State of Vermont USA and without regard to its choice of law provisions Any action to enforce any such terms shall be exclusively in the courts of competent jurisdiction in Chittenden County Vermont Any legal action between MicroStrain and buyer shall be decided by a court acting without a jury 17 Disclaimer of U N Sale of Goods The United
20. the battery 38 MicroStrain Inc Here are some example battery life calculations e Streaming with one 350 ohm strain gauge consumes 33 mA If the V Link battery capacity is 600 mAh the device will stream for 18 hours before re charging 15 required Datalogging with one 350 ohm strain gauge consumes 33 mA If the V Link battery capacity is 600 mAh the device will datalog for 18 hours before re charging 15 required e Sleep mode consumes 0 5 mA If the V Link battery capacity is 600 mAh the device will sleep for 1200 hours before re charging is required Bypassing the Internal Battery The V Link may be directly powered by external batteries external regulated power supply or other external source The source should deliver stable voltage must range between 3 2 to 9 0 volts DC and must be capable of sourcing at least 50 mA The power may be applied through the external power supply barrel connector on the side wall of the V Link Polarity must be observed the center post is positive and the outside barrel is ground Alternatively external power may be applied through pin 1 GND and pin 2 Vin on the terminal block connectors Please see the V Link Pin Assignments section of this manual for more details IMPORTANT There is an internal 2 position switch on the top of the V Link circuit board assembly that must be switched to the battery bypass position It is accessed by removing the 4 cover screws an
21. the invoiced amount of the returned products or one hundred 100 00 dollars To qualify for a credit or refund excluding shipping duties or taxes Buyer must contact MicroStrain in writing for a Return Merchandise Authorization RMA All Product returns shall comply with MicroStrain s Return Merchandise Authorization RMA policies Custom Products and modifications of standard Products are not eligible 60 MicroStrain Inc for return returns must be shipped by Buyer to MicroStrain C I F our distribution center as provided in the RMA policies provided by MicroStrain 6 Compliance with Laws Rules amp Regulations 1 Products sold may be exported from the United States of America only in accordance with US Export Administration Regulations and diversion contrary to US law is prohibited Buyer acknowledges that it is eligible to receive Products under US law and agrees to abide by all export or re export restrictions 11 Buyer acknowledges and recognizes that Buyer shall be wholly responsible for compliance with any laws rules and regulations pertaining to the use of any Product s which is incorporated into a Buyer product should such governmental approval be required for research testing or commercial use 7 Software License The following terms and conditions are applicable to either MicroStrain software delivered with a Product the software portion of the Product Software software which is embedded a P
22. use the Agile Link software or High Speed Streaming software your computer must have the following minimum specifications 1 GHz CPU Microsoft Windows XP Professional SP2 operating system CD ROM drive Video resolution 800 X 600 32MB video card Minimum of 256MB of memory Minimum of 50MB of free hard disk space for application Microsoft compatible mouse Software Installation e Place the Agile Link CD in your CD ROM drive and follow the on screen instructions to install MicroStrain s Agile Link software This installation places the Agile Link software on your as well as required base station drivers See Appendix 2 for more details o Agile Link is designed for use with 2 4 GHz V Link SG Link and G Link e The High Speed Streaming software is designed for use with the 2 4 GHz V Link SG Link and G Link If you intend to use High Speed Streaming install the software from the CD menu Refer to the High Speed Streaming Quick Start Guide for specialized details e Quick Start Guide for your particular wireless node 2 4 GHz V Link SG Link or G Link is provided on the CD to get you up and running Data Communications Protocol Customers and or developers wishing to customize the Agile Link family of wireless nodes and base stations are provided with the Agile Link 2 4 GHz Software Development Kit SDK The Agile Link 2 4 GHz Software Development Kit SDK is designed
23. 0 C range accuracy 0 5 025 In use with Agile Link software The V Link temperature sensor outputs 6 25 mV C The Agile Link software uses and any other application should use this formula to calculate temperature x 3000 mV 424 4096 sas C Temp 28 MicroStrain Inc Terminal Block Connectors The V Link has two 12 pin terminal blocks mounted on the sidewall of the enclosure These terminal blocks accommodate the 4 differential input channel sensor connections the 3 single ended channel sensor connections and an external power connection The two female connectors made into the sidewall of the enclosure are Phoenix Contact Model 1881545 The two removable male connectors are Phoenix Contact Model 1881422 Specific details on these connectors may be found at http www phoenixcon com Tip Strain gauge leads may be beefed up by tinning and or adding stiff wire to the end of the lead so that the leads are held firmly in the terminal block connector Loose connections will cause erroneous readings hs A 19 11 10 Sensor lerminal Blocks E M 4 1 T cH a E Figure 8 Link Pin Assignment 1 GROUND ENSOR 1 2 OPTIONAL 1 SENS 4 r 6 S gt 1 6 SENSOR POWER OUT SENSOR
24. 6 of this manual The V Link powers the differential input channel with 3 volts DC at up to 50 mA for bridge excitation A special feature of the excitation is that it will revert to a pulsed mode when sampling rates are below 100 Hz in order to conserve power Programmable gain 1s user adjustable and allows the bridge circuit to be amplified to suit the characteristics of the particular strain gauges in use this gain can be set from 210 to 4844 Programmable offset is also user adjustable and allows for the zeroing of strain gauge output Strain gauge bridges can have significant offset due to a number of factors including initial ohmic error in the gauge itself installation of the gauge on a non flat surface initial offset error in the electronics and small errors in the bridge completion resistors Details of programmable gain and offset use may be found in the Agile Link software manual Further conditioning noise reduction is provided by an anti aliasing filter 3dB down 500 Hz low pass filters with cutoff 500 Hz The V Link differential input channels additionally contain a precision 499 Kohm 499000 ohm resistor shunt resistor This resistor 15 employed by Agile Link software to perform a precise shunt calibration of the V Link and the Wheatstone bridge installation Alternatively users may either use Agile Link software to perform a shunt calibration using an external precision resistor or perform a shu
25. ASE STATION oce e iesu to MU 18 DIFFERENTIAL INPUT CHANNELS 19 CONNECTING A QUARTER BRIDGE STRAIN GAUGE 00 ee ee 21 CONNECTING A HALE BRIDGESTBRAIN GAUGE 23 CONNECTING FULL BRIDGE STRAIN GAUGE eese nennen nennen nens 25 SINGLE ENDED INPUT ITANINELS ted 27 TEMPERATURE SENSOR coo ioco eo acess ooi peo eal 28 TERMINAL BLOCK CONNECTONUS iini nieto eo iUe ee Eee i ite eines 29 MSIEINKGPINCASSIONMEBNDES NSA 30 A D D P 32 CHARGING EE ei d add OE dE iu IE M 32 CHARGE SEDE eiat rer 32 DEVICE STAT SSE D oie 32 TRIES ANTENNA
26. BUYER REPRESENTS WARRANTS AND INDEMNIFIES MICROSTRAIN FOR ANY AND ALL LIABILITY PERTAINNG TO THE USE OF PRODUCTS INCORPORATED INTO OR OTHERWISE USED IN A BUYER PRODUCT 9 Limited Software Warranty MicroStrain warrants that the software portion of the Product Software where applicable will substantially conform to MicroStrain s then current functional specifications for the Software as set forth in the applicable documentation from the date of original retail purchase of the Software for a period of ninety 90 days Software Warranty Period provided that the Software 15 properly installed on approved hardware and operated as contemplated in its documentation MicroStrain further warrants that during the Software Warranty Period the magnetic media on which MicroStrain delivers the Software will be free of physical defects MicroStrain s sole obligation shall be to replace the non conforming Software or defective media with software that substantially conforms to MicroStrain s functional specifications for the Software or to refund at MicroStrain s sole discretion Except as otherwise agreed by MicroStrain writing the replacement Software is provided only to the original licensee and is subject to the terms and conditions of the license granted by MicroStrain for the Software Software will be warranted for the remainder of the original Software Warranty Period from the date or original purchase If a material non conform
27. INK 2400 SKA V LINK 2400 SK1 V LINK 2400 SK2 V LINK QBRIDGE V LINK HBRIDGE V LINK IP65 ENCL V LINK IP65 XL ENCL V LINK IP65 XXL ENCL V LINK 2400 M V LINK wireless voltage node Operates on 2 4 GHz direct sequence spread spectrum IEEE 802 15 4 radio V LINK 2400 SKA V LINK starter kit includes one V LINK wireless voltage node one analog digital output base station with power supply charger and Agile Link software Operates on 2 4 GHz direct sequence spread spectrum IEEE 802 15 4 radio V LINK 2400 SK1 V LINK starter kit includes one V LINK wireless voltage node one USB base station charger and Agile Link software Operates on 2 4 GHz direct sequence spread spectrum IEEE 802 15 4 radio V LINK 2400 SK2 V LINK starter kit includes two V LINK wireless voltage nodes one USB base station charger and Agile Link software Operates on 2 4 GHz direct sequence spread spectrum IEEE 802 15 4 radio V LINK QBRIDGE quarter bridge customization option for V Link wireless nodes customer must specify Bridge Resistance This will be performed on all Wheatstone Bridge input channels unless otherwise specified V LINK HBRIDGE half bridge customization option for V Link wireless nodes customer must specify Bridge Resistance This will be performed on all Wheatstone Bridge input channels unless otherwise specified V LINK IP65 ENCL IP65 NEMAZA rated high strength fiberglass enclosure with 9V battery clip Dimensions
28. JUND a C SOR 2 edi Ns LU Sah S Z SENS 4 19 ENSOR 2 SENS f GROUN Z3 SENSOR POWER i 21 9 1 SENSOR 5 SENS 3 2 FNSOR 3 4 in ot Way gt Figure 8A 20 V Link amp Pin Assignments Signal Name Reference This is the system ground This provides the Pin 1 Ground Vin Input Pin 2 Power Supply Pin 3 Analog Single Ended Input 6 Pin 4 Analog Single Ended Input 5 Pin 5 Channel 4 Sensor Differential Amplifier Input Pin 6 Channel 4 Three Wire Input Pin 7 Channel 4 Sensor Differential Amplifier Input Pin 8 Ground Sensor Power Out Pin 9 Sensor Power Pin 10 Channel 3 Sensor Differential Amplifier Input Table 7 MicroStrain Inc reference to which signal inputs are measured and provides a return for power supply Optional power supply an internal Li Ion rechargeable battery 15 built in however an external DC power supply can be provided at this pin to replace use of internal battery The DC supply should be 3 6V to 9V and capable of supplying sufficient maximum current for the application usually 20 50 mA depending on external sensors and node configuration Note When using this pin the internal power switch must be switched This input is a single ended 0 3 volt input for transducers and or signal conditioners that provide a high level voltage output This signal connection is routed directly to channel 6 on the A D converter Note
29. M MATERIAL DEFECTS IN WORKMANSHIP AND MATERIALS FROM THE DATE OF DELIVERY TO THE CUSTOMER THIS WARRANTY EXTENDS ONLY TO THE ORIGINAL CUSTOMER OF MICROSTRAIN AND IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED WHETHER OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE AND OF ALL OTHER OBLIGATIONS AND LIABILITIES OF ANY KIND OR CHARACTER WHICH MAY OTHERWISE APPLY EXCEPT FOR THE WARRANTY DESCRIBED HEREIN MICROSTRAIN EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OF THE GOODS OR OF FITNESS FOR ANY PURPOSE THERE ARE NO OTHER WARRANTIES EXPRESS OR IMPLIED EXCEPT THOSE SPECIFICALLY PROVIDED FOR HEREIN BY 61 MicroStrain Inc ACCEPTING THE PRODUCTS FROM MICROSTRAIN THE BUYER ACKNOWLEDGES AND AGREES 1 THAT THE INHERENT VALUE OF THE PRODUCTS ARE UNRELATED TO THE VALUE OR COST OF ANY PROPERTY IN CONNECTION WITH WHICH THE PRODUCTS MAY BE USED AND THAT MICROSTRAIN MAKES NO WARRANTY THAT THE PRODUCTS WILL AVERT DETECT OR PREVENT OCCURRENCES OR THE CONSEQUENCES THEREFROM WHICH THE PRODUCTS ARE DESIGNED TO DETECT OR AVERT OR THAT THE PRODUCTS MAY NOT BE COMPROMISED DISABLED OR CIRCUMVENTED 11 THAT MICROSTRAIN HAS MADE NO CONTRARY REPRESENTATIONS OR WARRANTIES OF ANY KIND EXPRESS OR IMPLIED TO OR FOR THE BENEFIT OF CUSTOMER and 111 THAT ANY NUMBER OF CAUSES MAY CAUSE A FALSE ALARM OR FALSE READING FROM MICROSTRAIN S PRODUCTS AND THAT MICROSTRAIN DOES NOT WARRANT AGAINST SUCH FALSE RESULTS
30. Payment shall be made in advance in U S dollars by credit card bank draft or letter of credit unless otherwise agreed in writing by MicroStrain At the sole discretion of MicroStrain credit terms of net 30 days up to a pre approved limit may be offered to buyer A late payment charge of one and a half 1 5 percent per month or the maximum percentage rate permitted by law if lower shall be charged on all past due balances Buyer agrees to pay all costs incurred by MicroStrain including but not limited to collection fees court costs and attorney fees associated with collection of past due balance 4 Shipping Terms Products delivered to you by us shall be F O B our distribution center with risk of loss passing to you upon our delivery of the Products to a common carrier MicroStrain will arrange payment for shipping and insurance with the carrier but such costs are the responsibility of Buyer Delivery times quoted are estimates only and MicroStrain shall not be liable for delays in delivery 5 Acceptance amp Returns Shipments shall be deemed to have been accepted by the buyer upon receipt of shipment Any discrepancy in shipment quantity must be reported within five 5 days of receipt of shipment Buyer may return starter kits or evaluation units for any reason within thirty 30 days of the date of shipping from MicroStrain All other returns shall be subject to a restocking fee of the greater of twenty five 25 percent of
31. The source impedance should be less than 5K ohms This input is a single ended 0 3 volt input for transducers and or signal conditioners that provide a high level voltage output This signal connection is routed directly to channel 5 on the A D converter Note The source impedance should be less than 5K ohms This 15 the positive input to the channel 4 programmable gain amplifier PGA This 16 the input for three wire mode on quarter bridge strain gauge bridges Leave unconnected for non quarter strain gauge bridge applications This is the negative input to the channel 4 PGA This is the system ground This provides the reference to which signal inputs are measured and provides a return for power supply This signal provides output power to external sensors This output is only active when the unit is sampling the sensors Maximum combined load on this pin and pin 16 15 50 mA This is the negative input to the channel 3 PGA 30 MicroStrain Inc Pin 11 Channel 3 Sensor3Sens Input This is the input for three wire mode on quarter Three Wire Input bridge strain gauge bridges Leave unconnected for non quarter strain gauge bridge applications Pin 12 Channel 3 Sensor3 Input This is the positive input to the channel 3 PGA Sensor Differential Amplifier Input Pin 13 Channel 1 Sensor1 Input This is the positive input to the channel 1 PGA Sensor Differential Amplifier Input Pin 14 Channel 1 Se
32. User Manual Version 4 0 1 V Link Wireless Voltage Node V Link 4 p MicroStain MicroStraim TC Link MicroStrain 17 Ls EU m Fa MicroStrain Micro Sensors Big Ideas www microstrain com MicroStrain Inc 2010 by MicroStrain Inc 459 Hurricane Lane Suite 102 Williston 05495 Phone 802 862 6629 Fax 802 863 4093 www microstrain com support microstrain com ISSUED 25 June 2010 MicroStrain Inc Table of Contents WELCOME aoa 5 SUPPORTED FIRMWARE AND SOFTWARE 5 8 6 GUIDE TO RELEVANT DOCUMENTS 2 iPod eoo It dro 6 OVERVIEW 7 iunii diei od iiid 8 STARTER KITS MODULES AND OPTIONS 9 COMNIONCTERIMIS ridi eiie 11 OPERA TION br PRIUS 13 BASE STA TIONS c E 17 USB BASE STATION ___________ __________ ___ 17 ANALOG BASES TATION ocio ________ _ 17 SERIAL B
33. a function of the number of active channels being sampled and may not be set by the user Datalogging The sampling rate may be set to any of the following rates 32 samples per active channel per second 64 samples per active channel per second 128 samples per active channel per second 256 samples per active channel per second 512 samples per active channel per second 1024 samples per active channel per second 2048 samples per active channel per second Streaming The sampling rate is a function of the number of active channels e 1 channel is active the sampling rate will be 736 samples per second for the channel e 12 channels are active the sampling rate will be 679 samples per active channel per second e If 3 channels are active the sampling rate will be 617 samples per active channel per second e 4 channels are active the sampling rate will be 565 samples per active channel per second e channels are active the sampling rate will be 520 samples per active channel per second e If 6 channels are active the sampling rate will be 485 samples per active channel per second e 7 channels are active the sampling rate will be 452 samples per active channel per second e Schannels are active the sampling rate will be 424 samples per active channel per second Low Duty Cycle The sampling rate may be set to any of the following rates 500 samples per second for each active channel 250 samples per sec
34. ails Proceed to download datalogging from each node individually as described in the Operating one node in datalogging mode section above Broadcast does not allow downloading of several nodes coincidentally 68 MicroStrain Inc Appendix 3 Streaming with Agile Link software Streaming Streaming allows you to sample each sensor each channel on a node at rates as high as 736 samples per channel per second Sensor data is transmitted to the base station as it 1s sampled in real time and is collected displayed and saved by Agile Link software Please review the Sampling Rates section of this manual for sampling rate details Operating one node in streaming mode A streaming session should be started by setting your configuration It is assumed that a strain gauge has been applied to channel 1 the Strain wizard has been run and no strain is being applied to the gauge Establish communication with the node and right click to get the drop down menu Click Configure The Configuration window will appear Click the Channels tab Check the box to enable V Link s channel 1 Uncheck the channel 2 through 8 boxes to disable these channels Leave the Offset scroll boxes for channel 1 at the default value of 512 mid scale Leave the Hardware Gain text box at the default value of 210 Click Apply Click the Streaming tab Uncheck box for Continuous Streaming Enter the value 5000 into the Sweeps scroll box Note that a streaming se
35. ance is incapable of correction or if MicroStrain determines in its sole discretion that it is not practical to replace the non conforming Software the price paid by the original licensee for the non conforming Software will be refunded by MicroStrain provided that the non conforming Software and all authorized copies thereof 15 first returned to MicroStrain The license granted respecting any Software for which a refund is given automatically terminates 10 Limitation of Liability IN NO EVENT SHALL THE MICROSTRAIN BE LIABLE FOR SPECIAL DIRECT INDIRECT INCIDENTAL OR CONSEQUENCIAL DAMAGES INCLUDING BUT NOT LIMITED TO LOSS OF PROFIT OR OPPORTUNITY OR SIMILAR DAMAGES WHICH MAY ARISE IN CONNECTION WITH ANY OF MICROSTRAIN S PRODUCTS BUYER S SOLE AND EXCLUSIVE REMEDY SHALL IN NO EVENT EXCEED THE REPAIR 62 MicroStrain Inc REPLACEMENT OR COST OF THE SPECIFIC PRODUCT PURCHASED FROM MICROSTRAIN AS PROVIDED IN THE WARRANTY PERIOD 11 Warranty Repair MicroStrain s sole obligation shall be to repair or replace the defective Product during the applicable Warranty Period at no charge to the original owner or to refund at MicroStrain s sole discretion Such repair or replacement will be rendered by MicroStrain The replacement Product need not be new or have an identical make model or part MicroStrain may in its sole discretion replace the defective Product or any part thereof with any reconditioned Product or similar Product that Mi
36. atalogging memory Therefore we could run 100 196 100 consecutive finite datalogging sessions before we would have to download the data Example 3 We set the V Link with channels 1 2 and 3 active with a sampling rate of 1 024 samples per channel per second with continuous datalogging enabled and memory fully erased This session will produce 1 024 samples per second x 3 channels 3 072 data points per second This session will last 1 081 212 data points 3 072 data points per second 352 seconds until the datalogging memory is full and datalogging 15 automatically ended 48 MicroStrain Inc Factory Calibration and Testing Calibration The V Link has no particular components which require factory calibration and certification Testing The V Link receives final precision testing prior to being shipped Tests are conducted on the four differential input channels strain channels the three single ended input channels analog channels the internal temperature sensor channel the internal battery and other components The original Functional Test Checklist 1s included with each V Link This document details test results as well as radio channel setting bridge completion and on board shunt resistor value This document should be safeguarded for future use 49 MicroStrain Inc General Specifications Input Channels Temperature Sensor channel 8 Measurement Accuracy Resolution DC Bri
37. ceives the data from the base station parses caches and displays the data and provides for the data to be saved into CSV formatted files for further analysis Please note that the Analog base station will support streaming through its analog backplane see the Base Station manual for details In the LOW DATA DUTY sampling method the V Link may be configured to sample data as fast as 500 samples per channel per second to as slow as 1 sample per channel per hour Low Duty Cycle can be finite or continuous In finite low duty cycle a sampling duration is set and the low duty cycle session will last the duration once initiated In continuous low duty cycle the low duty cycle session will last until the host software stops the session or the power 1s cycled on the V Link The data is transmitted over the air to the base station during low duty cycle no data 15 written to the on board memory during the session During low duty cycle the software receives the data from the base station parses caches and displays the data and provides for the data to be saved into CSV formatted files for further analysis Please note that the Analog base station will support streaming through its analog backplane see the Base Station manual for details In the HIGH SPEED STREAMING sampling method the V Link sampling rate is directly dependent on the number of sensor channels which are active With 1 channel active the channel will be sampled at the rate of 4000
38. croStrain reasonably determines is substantially equivalent or superior in all material respects to the defective Product Repaired or replacement Products will be warranted for the remainder of the original applicable Warranty Period from the date of original purchase If a material defect is incapable of correction or if MicroStrain determines in its sole discretion that it is not practical to repair or replace the defective Product the price paid by the original purchaser for the defective Product will be refunded by MicroStrain upon return to MicroStrain of the defective Product All Products or parts thereof that is replaced by MicroStrain or for which the purchase price is refunded shall become the property of MicroStrain upon replacement or refund 12 Non Applicability of Warranty The Limited Warranty provided hereunder for Products will not be applied to and does not cover any refurbished product and any Product purchased through an inventory clearance or liquidation sale or other sales in which MicroStrain the sellers or the liquidators expressly disclaim their warranty obligation pertaining to the Product and in that case the Product is being sold As Is without any warranty whatsoever including without limitation the Limited Warranty as described herein notwithstanding anything stated herein to the contrary 13 Submitting A Claim The customer shall return the Product to the original purchase point based on its return policy
39. d packages will be shipped to the customer via UPS Ground or any 63 MicroStrain Inc common carrier selected by MicroStrain with shipping charges prepaid Expedited shipping is available if shipping charges are prepaid by the customer and upon request v Return Merchandise is to be shipped to MicroStrain Inc at the address indicated below vi MicroStrain may reject or return any Product that is not packaged and shipped in strict compliance with the foregoing requirements or for which an RMA number has not been obtained or is not visible from the outside of the package The Product owner agrees to pay MicroStrain s reasonable handling and return shipping charges for any Product that is not packaged and shipped in accordance with the foregoing requirements or that is determined by MicroStrain not to be defective or non conforming 14 What Is Not Covered This Limited Warranty provided by MicroStrain does not cover Products if in MicroStrain s sole and exclusive judgment have been subjected to abuse accident alteration modification tampering negligence misuse faulty installation lack of reasonable care repair or service in any way that 1s not contemplated in the documentation for the Product or if the model or serial number has been altered tampered with defaced or removed Initial installation installation and removal of the Product for repair and shipping costs Operational adjustments covered in the operating manual for
40. d the cover of the enclosure The figure below shows the Default position for internal battery and the Bypass position for external power source DEFAULT T BYPASS INTERNAL POWER SWITCH RECHARGING POWER CONNECTOR ON OFF SWITCH ANTENNA CONNECTOR Figure 10 V Link Rev F forward 39 MicroStrain Inc Power Profile Power consumption on the V Link is influenced by a wide range of variables including operating mode sampling rate and number of active channels A current power profile which outlines power consumption for the matrix of operating states is available at http www microstrain com pdf V Link PowerProfile node FW 4 98 pdf 40 MicroStrain Inc Standard Enclosure The V Link standard enclosure is flame rating UL 94 5VA ABS plastic It is a 2 part assembly with base and removable cover It is custom manufactured for MicroStrain Please see the Mechanical Drawings section of this manual for dimensions V Link Figure 11 41 MicroStrain Inc Optional Enclosures The V Link is optionally available installed within IP65 NEMA 4 enclosures which provide environmental protection and or larger battery capacity IP65 standard Provides for 1 protection against a wire touching dangerous parts and 2 sealed against dust NEMA 4 standard Computer enclosures constructed for either indoor or outdoor use to provide a degree of protection to personnel aga
41. de address For example if several nodes hear a command for node 65535 to start datalogging they will all initiate datalogging simultaneously It is extremely important that no particular node be assigned the 65535 broadcast address Note The Streaming and High Speed Streaming commands in Agile Link software can not use the broadcast 65535 address 35 MicroStrain Inc Sample Duration Calculations Datalogging streaming low duty cycle and high speed streaming sampling sessions can all be set to last a finite duration a finite amount of time Finite sample duration is a value ranging from 100 to 65500 in increments of 100 A datalogging example We set the number of active channels to 3 We set the sample rate to 32 We set the sampling duration to 1000 We trigger the session We download the session We find that we have 1000 rows of data with each row containing 3 channels of sensor data We see that the session lasted 31 25 seconds Another datalogging example We set the number of active channels to 1 We set the sample rate to 1024 We set the sampling duration to 10000 We trigger the session We download the session We find that we have 10000 rows of data with each row containing 1 channel of sensor data We see that the session lasted 9 77 seconds From this is becomes clear how the sampling duration can be thought of as a time setting e our first example we can divide a sampling duration of 1000 by a sample rat
42. dge Excitation Programmable Gain Programmable Offset Analog to Digital A D Converter Data Storage Capacity Data Logging Mode Sensor event driven trigger Real time streaming mode Low duty cycle mode Synchronization between nodes Sample rate stability Wireless Shunt Calibration Radio Frequency RF Transceiver Carrier RF Data Packet Standard Up to 8 input channels 4 full differential 350 9 resistance or higher with optional bridge completion 3 single ended inputs 0 3 volts maximum and internal temperature sensor 25 C to 70 C range typical accuracy 0 5 C at 25 C 0 1 typical 1 bit 0 024 3 volts DC at 50 mA maximum pulsed to sensors for sample rates of 100 Hz and below to conserve power Software programmable for differential input channels from 210 to 4844 can be reduced with hardware resistor change Software programmable maximum allowable input offset is 1 5 volts Successive approximation type 12 bit resolution 2 megabytes approximately 1 000 000 data points Log up to 1 000 000 data points from 100 to 65 500 samples or continuous at 32 Hz to 2048 Hz Commence datalogging when threshold exceeded Transmit real time data from node to PC rate depends on number of active channels 1 channel 4 KHz 2 channels 2 KHz 3 channels 1 33 KHz 4 channels 1 KHz 5 channels 800 Hz 6 channels 666 Hz 7 channels 570 Hz 8 channels 500 Hz Supports
43. e of 32 to equal 31 25 seconds our second example we can divide a sampling duration of 10000 by a sample rate of 1024 to equal 9 77 seconds A streaming example We set the number of active channels to 3 We can t set the sample rate because that is fixed in hardware and we know it will be 617 We set the sampling duration to 10000 We start the session We save the session We find that we have 10000 rows of data with each row containing 3 channels of sensor data We see that the session lasted 16 21 seconds As before 10000 sampling duration divided by 617 sample rate 16 21 seconds A low duty cycle example We set the number of active channels to 3 We set the sample rate to 1 We set the sampling duration to 100 100 is the minimum setting in Agile Link software We start the session We save the session We find that we have 100 rows of data with each row containing 3 channels of sensor data We see that the session lasted 100 seconds As before 100 sampling duration divided by sample rate 100 seconds A high speed streaming example We set the number of active channels to 4 We can t set the sample rate because that 1s fixed in hardware and we know it will be 1000 We set the sampling duration to 10000 We start the session We save the session We find that we have 10000 rows of data with each row containing 4 channels of sensor data We see that the session lasted 10 seconds As before 10000 sampling durat
44. e active the sampling rate will be 666 samples per active channel per second If 7 channels are active the sampling rate will be 570 samples per active channel per second If 8 channels are active the sampling rate will be 500 samples per active channel per second MicroStrain Inc Datalogging Memory The V Link contains 2 megabytes of memory reserved for storage of datalogging As a bit of background the memory 1s actually organized into 8 191 pages with each page able to hold 132 data points or a total of 8 191 pages x 132 data points 1 081 212 data points Let s look at some sample datalogging sessions and see how they consume memory Example 1 We set the V Link with channels 1 2 and 3 active with a sampling rate of 2 048 samples per channel per second and a sweep rate of 20 000 9 77 seconds This session will produce 20 000 sweeps x 3 channels 60 000 data points This session will consume 60 000 data points 1 081 212 data points 5 of the datalogging memory Therefore we could run 100 5 20 consecutive finite datalogging sessions before we would have to download the data Example 2 We set the V Link with channel 3 active with a sampling rate of 512 samples per channel per second and a sweep rate of 10 000 19 53 seconds This session will produce 10 000 sweeps x 1 channels 10 000 data points This session will consume 10 000 data points 1 081 212 data points 1 of the d
45. e first sensor companies to add wireless capability so that low power miniature digital sensors could communicate easily with personal computers and send data to the internet Our inclinometer product line was initially developed to measure angles of limbs to help re animate the limbs of paralyzed individuals The tiny lightweight gyro enhanced orientation modules that resulted from this effort found immediate acceptance for navigation amp control of unmanned systems in military and exploratory robotics applications Sensors are literally changing our world we re inspired to work with our customers to introduce advanced sensing technology that will enable the next generation of smarter and safer machines civil structures and implanted devices Thank you for purchasing a MicroStrain sensor Steve Arms President and CEO MicroStrain Inc MicroStrain Inc Supported Firmware and Software Versions V Link 4 99 and higher Agile Link 1 4 1 and higher SG Link 4 99 and higher Agile Link 1 4 1 and higher G Link 4 99 and higher Agile Link 1 4 1 and higher TC Link 4 99 and higher Agile Link 1 4 1 and higher USB Base Station 2 0 7 and higher Agile Link 1 4 1 and higher Analog Base Station 2 0 7 and higher Agile Link 1 4 1 and higher Serial Base Station 2 0 7 and higher Agile Link 1 4 1 and higher Table 1 Guide to Relevant Documents SG Link SG Link Quick Start Guide Table 2 MicroStrai
46. e use should be started by setting your configuration Establish communication with the node and right click to get the drop down menu Click Configure and the Configuration window opens Click the Channels tab and apply as you normally would the active channels etc Now click the Low Duty Cycle tab Set the Sample Rate drop down box to 1 sample per second Note You may select any of a number of sampling rates ranging from 500 Hz to 1 sample per hour For finite LDC uncheck the Continuous Low Duty Cycle checkbox Set the Sweeps numscroll to 200 200 samples over 200 seconds Note You may select any number of sweeps ranging from 100 to 65500 Click Apply Or For continuous LDC check the Continuous Low Duty Cycle checkbox The Sweeps value is disregarded Click Apply Click OK to close the Configuration window Configuration Node 759 Channels Streaming Low Duty Cycle Datalogging Power Management Graphing Infe lt Low Duty Cycle Configuration F Continuous Low Duky Cycle Low Duby Cycle Settings A Sweeps 2000 Time Duration 2000 00 sec 71 MicroStrain Inc If you plan to acquire data in engineering units you should proceed to setting Channel Actions Click View Click Channel Actions The Channel Actions window appears Click Resync to set existing calibrations to the active channels or manually Setup each channel from here When completed click the red X in the u
47. e will continue to operate in Low Duty Cycle mode and not be able to communicate normally until you cycle its power After cycling you will again be able to communicate normally with the node Operating multiple nodes in LDC As was stated above operating multiple nodes in Low Duty Cycle should be started by individually setting each node s configuration and Channel Actions Multiple nodes can be started 1n Low Duty Cycle at the same instant Press and hold down the Ctrl key Click each node that you want to include in the session Comm 10 ill All alll ail Release the Ctrl key Right click the base station and a menu will appear lt Stream Low Duty Cycle Sleep Cycle Power Ping Load Node Information Remove Click Low Duty Cycle All nodes that were selected will now begin LDC and will all be sampled by the software Note The nodes will commence at the same instant and although each node runs independently the nodes will have near real time synchronization subject to very small error as a result of their individual clock crystals 74 MicroStrain Inc Note Alternatively all nodes assigned to a base station can be started at the same time Right click the base station and click LDC Monitor Node A Data Collector window will spawn and all nodes will automatically start Low Duty Cycle As before a Data Collector window is spawned in the graphing area and
48. echNote_2400_V Link_Thermocouples pdf lt CO CN PO s s CN CN x 12 x 1 A 10 X o OPTIONAL POWER SUPPIY lt x c x 4 x 3 2 79
49. eed Streaming with High Speed Streaming software High Speed Streaming High Speed Streaming allows you to sample each sensor each channel on a node at rates as high as 4000 samples per channel per second Sensor data is transmitted to the base station as it is sampled in real time and is collected displayed and saved by the High Speed Streaming software Please review the Sampling Rates section of this manual for sampling rate details Operating one node in high speed streaming mode Please refer to the High Speed Streaming Quick Start Guide which is contained on the Agile Link CD and on our web site 77 MicroStrain Inc Appendix 6 Bridge Completion Resistors The picture below shows how to determine what bridge completion 15 in place on your Link Jumpers provide a direct connection between circuit points resistors will have the value of the specified bridge completion DO NOT ATTEMPT TO MODIFY YOUR V LINK BRIDGE RESISTORS WITHOUT PRIOR CONSULATION WITH MICROSTRAIN SUPPORT ENGINEERS ANY ATTEMPT WILL IMMEDIATELY INVALIDATE THE PRODUCT WARRANTY 47 7 4 y 2 3 jn 404 Aue ayejndod 00 78 MicroStrain Inc Appendix 7 Attaching a Thermocouple A step by step instruction for thermocouple use with the V Link is available at http www microstrain com tech_notes T
50. erify will test whether the base station and software are communicating successfully e A Ping will test whether a single byte transmission from the base station to the node is successful e A Range Test will test whether communication is being maintained over a period of time between the base station and the node e A Cycle Power will have the effect of manually cycling the power on the node e Node Discovery allows the base station to detect any node on any frequency as it 15 powered on e Load Node Information reads and displays the model serial number firmware version and other statistics of the node e Frequency allows reading and setting of the channel on which the node is operating Read Write EEPROM allows direct reading and setting of parameters maintained in EEPROM Please see the Agile Link software manual for more information on software accessible features of the V Link 16 MicroStrain Inc Base Stations The V Link is designed to operate with any of the Agile Link wireless family base stations These base stations include the USB base station the Analog base station and the Serial base station Please refer to the Agile Link Base Station manual which is contained on the Agile Link CD and on our web site for detailed instructions on their use with V Link USB Base Station The MicroStrain USB base station is a transceiver which provides a communication link between a host computer and the Agile Lin
51. for use with the 2 4 GHz V Link SG Link G Link USB Base Station 55 MicroStrain Inc Serial Base Station and Analog Base Station The SDK provides a complete Data Communications Protocol manual as well as code samples for C VB and LabVIEW The SDK is designed to provide the application builder with all the necessary protocol commands and responses to build robust wireless sensor applications for the Agile Link wireless sensor network The Data Communications Protocol manual details these commands Ping base station Read base station EEPROM Write base station EEPROM Short ping Read node EEPROM Write node EEPROM Download page Erase session data Trigger datalogging session Initiate real time streaming Initiate sleep mode Read single sensor Auto balance channel Long ping Initiate low duty cycle Initiate high speed streaming Stop node and more Sample applications demonstrating most protocol commands are provided with fully commented source code and a compiled executable for Microsoft C 6 0 Microsoft C 7 1 Microsoft VB 6 0 Microsoft VB NET 2003 Microsoft VB NET 2005 and LabVIEW 7 1 The source code contains only objects native to the particular IDE with no third party controls added The SDK 15 shipped on the CD with one license for use 56 MicroStrain Inc Support Overview e MicroStrain is committed to providing timely knowledgeable world class support to its customers
52. ications may be found at http www antennafactor com documents ANT 2 4 CW RCS Data Sheet pdf The stated range for the V Link 9 is up to 70 meters line of sight from its base station An optional high gain antenna may be added to the base station and or node to increase the range up to 280 meters line of sight Please review our technical note Maximizing Wireless Communication Range at http www muicrostrain com pdf TechNote 2400 RangeExtendingAntennae pdf The V Link 9 may experience radio performance problems on the 2 4 GHz band as a result of the many other devices that share this license free zone If you suspect that other devices in the immediate area might be interfering with the V Link s transmissions simply select a different channel As we said earlier the V Link can be set to operate on any of 16 different frequencies within the band The V Link can also be provided with an optional internal wire lead type antenna so that there 1s no antenna mast extending from the enclosure Please contact your MicroStrain Sales representative for more information 34 MicroStrain Inc Node Addressing Each node has a unique address from 1 to 65534 which identifies the node to the base station and software Typically the factory assigns the last 4 digits of the node s serial number as the address and changes to this address are not recommended except under special circumstances Address 65535 is a specialized broadcast no
53. inst incidental contact with the enclosed equipment to provide a degree of protection against falling dirt rain sleet snow windblown dust splashing water and hose directed water and that will be undamaged by the external formation of ice on the enclosure V LINK IP65 ENCL Description 65 rated high strength fiberglass enclosure with 9V battery clip ON OFF SWITCH V LINK BOARD PCB MOUNTING BLOCK WITH BATTERY UNDERNEATH CHARGING JACK IP65 FIBERGLASS ENCLOSURE 4 32 X 2 94 2 18 WITH COVER CABLE GLANDS 4 FOR 12 TO 26 DIA CABLE Figure 12 42 MicroStrain Inc V LINK IP65 XL ENCL Description IP65 NEMAA rated high strength fiberglass enclosure with non rechargeable 3 6V Lithium D cell battery CABLE GLANDS 4 ON OFF SWITCH FOR 12 TO 26 DIA CABLE PCB BOARD AMD CELL MOUNTING PLATE 5 FIBERGLASS ENCLOSURE 8 30 x 2 94 x 2 18 WITH COVER Figure 13 V LINK IP65 XXL ENCL Description IP65 NEMAd rated high strength fiberglass enclosure with 3 parallel non rechargeable 3 6V Lithium D cell batteries ON OFF SWITCH 3 D CELLS 3 EACH V LINK PC BOARD ANTENNA CABLE MOUNTING PLATE CABLE GLANDS 2 FOR 12 TO 26 DIA CABLE IPBS POLYCARBONATE ENCLOSURE 6 73 X 4 76 X 2 17 WITH COVER Figure 14 43 MicroStrain Inc High G Option The V Link may be optionally purchased with provisions made to withsta
54. ion divided by 1000 sample rate 10 seconds 36 MicroStrain Inc Time Stamping The V Link node and Agile Link software handle time stamping of datalogging streaming low duty cycle and high speed streaming data in different ways The table below describes the various methods Sampling Time Stamp Source Clock Type Stability Method Datalogging Omitted to Node Crystal 25ppm maximize data rate Streaming Omitted to Node Crystal 25ppm maximize data rate Absolute time PC Windows OS stamp LDC gt 1 Hz 25 High Speed 16 bit counter Node Crystal 25ppm Streaming Table 9 Notes 1 16 bit counter and absolute time stamp are both applied 27 MicroStrain Inc Power The V Link is normally powered by its internal rechargeable Lithium Ion battery and may also be powered by an external source On Off Switch The V Link has a 2 position on and off toggle switch on its sidewall next to the antenna post With the V Link placed flat with the label up OFF is down and ON is up Internal Battery The V Link contains an internal rechargeable Ultralife brand 3 7 volt Lithium Ion battery http www ultralifebatteries com datasheet php ID UBP003 The V Link internal battery has a manufacturer stated nominal capacity of 600 mAh C 5 Rate 23 C The V Link internal battery has a manufacturer stated recharge cycle life of gt 500 cycles C 5 to 80 of initial capacity
55. ire com a sample is included with each starter kit Shield Drain Bs PR P 5t Rg Rg Active Active i RL o 5 5 Internal 5 Sensor Circuitry Rg Rg Active Active RL 7 Ground Sensor Ground RL x RL Lead Resistance Figure 6 Sensor Pin Signal S Pin S Pin Ground Pin Power Signal Signal 42 22 5 9 4220 O 7 1 18 Table 6 2 MicroStrain Inc FULL BRIDGE 1 NE E BRIDGE 2 N A BND 2 47 s 10 000 x ANNAN d d ins d Tee N 7 N _ if a na 2 11 d EN 4 2 PN x VU 2 3 MM ____ 2 1 N Z i 9 P d Sur N Aen ue Ss 2 V 7 7 _1 X 7 ONAL POWER SUPPLY Figure 7 26 MicroStrain Inc Single Ended Input Channels The V Link has three single ended input channels These channels will accommodate most 0 3 volt DC analog output sensors including accelerometers pressure sensors geophones temperature sensors inclinometers and the like The V Link can provide 3 volts DC up to 50 mA to the sensor Alterna
56. k family of wireless nodes including V Link SG Link G Link and Link The USB base station employs a 2 4 GHz radio with 16 selectable channels to communicate with the remote nodes The USB base station 1s connected to a host computer via a USB connection and is operated with MicroStrain s Agile Link software The USB base station under instruction from the software wirelessly communicates with the Agile Link nodes alternately sending commands and configurations and receiving responses and data The USB base station sends all of the commands available to the nodes including ping datalog stream data erase read and write EEPROM etc The USB base station in turn receives acknowledging responses from the nodes and passes datalogging downloads streaming data high speed streaming data and low duty cycle data to the host computer The USB base station is capable of maintaining communications with multiple nodes Its broadcast mode allows the simultaneous issuance of several commands to multiple nodes Analog Base Station The MicroStrain Analog base station is a transceiver which provides a communication link between a host computer and the Agile Link family of wireless nodes including V Link SG Link G Link and TC Link The Analog base station employs a 2 4 GHz radio with 16 selectable channels to communicate with the remote nodes The Analog base station is connected to a host Sev POS tran
57. l of data from up to 8 individual V Link 9s Please refer to the Agile 15 MicroStrain Inc Link Base Station manual which is contained on the Agile Link CD and on our web site for detailed instructions its use with V Link The V Link has an additional datalogging feature which we describe as Sensor Event Driven Trigger SEDT In SEDT the V Link may be configured to commence datalogging automatically each time a ceiling or floor sensor output is met For example you may set the V Link so that a datalogging session 1s triggered whenever channel 1 a differential input channel exceeds goes through the ceiling of 40 microstrain The session will begin automatically run its finite duration and stop With the next 40 microstrain ceiling event the V Link would again run a datalogging session automatically without manual intervention When the V Link is not sampling it can be in one of two states Sleep or idle In Sleep mode the V Link on a settable interval by default 5 seconds momentarily awakens and listens for any commands If a command 15 heard it wakes and responds to the command if no command is heard it goes back to sleep This sleep function is used to conserve battery power In idle mode the V Link 16 awake and listening for commands from a base station Several configuration operational test functions exist for the V Link some of the more often used functions are listed below e A V
58. l time GMT 05 00 Eastern Time US amp Canada SKYPE MicroStrain s Support Engineers are available by SKYPE Monday through Friday 9 00AM to 5 00PM local SKYPE name microstrain wireless support 57 MicroStrain Inc RMA Warranty Return As described in our Year Warranty contained in the Terms and Conditions stated elsewhere in this manual MicroStrain will incur for its own account any cost to repair replace a MicroStrain product covered under the warranty Non warranty Return All non warranty repairs replacements will receive a minimum charge The minimum charge for standard wireless displacement and orientation products is US 75 00 The minimum charge for non standard or custom products is US 150 00 If the repair replacement charge exceeds the minimum the minimum is folded into the total repair replacement cost General Instructions In order to return any MicroStrain product you must contact us for a Return Merchandise Authorization number RMA Call toll free 800 449 3878 to obtain an RMA from a MicroStrain representative All returned merchandise must be in the original packaging including manuals accessories cables etc with the authorization RMA clearly printed on the outside of the package MicroStrain is not responsible for shipping costs from and to the customer or damage on returned items Units to be returned should be packed carefully Please be advised that packages sent by normal US Postal Se
59. m x 65 mm x 24 mm For dimensioned print go to www microstrain com 97 grams ABS plastic Agile Link Windows XP compatible Serial port 115 2 kBaud Table 10 con t 51 Mechanical Drawings Enclosure Dimensions 0 162 3 000 3 500 2 80 188 THRU Figure 15 m 1 000 MicroStrain Inc 52 MicroStrain Inc Circuit Board Assembly Dimensions 0 324 Figure 16 53 Electrical Block Diagram 3 reg uibsted 3 anti gt alissing EEPROM Du filter zone cx poet filter am parameters 15 bit HD Gnd A D micraprmocesspg E embedded software algorithms E L 2 MBytes Flash Memory 4 iritemal temp C ml ALO De ariran d Figure 17 MicroStrain Inc Eram amakig bes D 2 0 5 to DAD far programming display amp data 54 MicroStrain Inc Software Standard Offering All V Link SG Link and G Link starter kits are shipped with a CD containing Agile Link software and High Speed Streaming software These two softwares support all capabilities of the V Link SG Link and G Link including datalogging streaming low duty cycle high speed streaming configuration data download data file saving real time sensor display and other features System Requirements To
60. multiple nodes on single RF channel total update bandwidth of 500 Hz divided by number of nodes Datalogging 100 usec 50 ppm LDC mode time stamped at PC Datalogging and mode 2Hz to 500 Hz 25 ppm 90 msec hour LDC mode 1 Hz to 2 samples hour 10 Channels 1 to 4 Internal shunt calibration resistor 499 2 4 GHz direct sequence spread spectrum license free worldwide 2 405 to 2 480 GHz 16 channels Radiated power 0 dBm 1mW IEEE 802 15 4 open communication architecture Table 10 50 RF Programming amp Downloading Range for Bi directional RF Link Internal Li Ion Battery Power Consumption Operating Temperature Dimensions Weight Case Software PC Comm MicroStrain Inc 8 minutes to download full memory 70 m line of sight up to 300 m with optional high gain antenna 3 7 volt lithium ion rechargeable battery 600 mAh capacity Customer may supply external power from 3 2 to 9 volts V Link node only real time streaming 25 mA datalogging 25 mA sleeping 0 5 mA External sensors 350 Q strain gauge 8 mA 1000 Q strain gauge 3 mA add sensor consumption to above to calculate total power consumption 20 to 60 with standard internal battery and enclosure extended temperature range optional with custom battery and enclosure 40 to 85 C for electronics only 88 mm x 72 mm x 26 mm including mounting tabs and screw terminal block input connector board only 72 m
61. n Inc Overview The V Link is a wireless voltage node and is a specialized member of MicroStrain s Agile Link wireless data acquisition system The Agile Link system comprises 3 main components 1 wireless sensor nodes which acquire and transmit strain voltage temperature acceleration and or other sensor data 2 base stations which receive and pass the data to a host and 3 software which operates the system The V Link provides 7 external measurement channels being 4 differential input channels strain channels primarily designed to support strain gauges of 350 ohm resistance or greater and 3 single ended input channels analog channels designed to support 0 3 volt sensors The combination of the 7 measurement channels supports a wide range of Wheatstone bridge type and analog sensors including strain gauges displacement sensors load cells torque transducers pressure sensors accelerometers geophones temperature sensors and inclinometers The V Link also has an on board temperature sensor The V Link employs 12 bit A D converter to digitize the voltage on the differential input single ended input and temperature channels The digital data is passed to the on board microprocessor processed with the embedded algorithm and in turn either passed to its radio for immediate transmission or saved to the 2MB on board flash memory for later download Host computer software displays the data provides a
62. n be further processed into engineering units by using the scaling provided by the sensor manufacturer Agile Link software provides an on board function Custom Formula which allows for engineering units to be output and displayed directly from the software if the manufacturer s scaling formula is linear Polynomial scaling non linear scaling and so forth will have to be dealt with on a post processing basis by the user In some case users may want to use sensors which require 5 volt or more excitation A voltage divider can be employed between the sensor and the V Link terminal block connector to facilitate a 3 volt input Caution should be exercised such cases as any inherent signal noise will be amplified The V Link can not be used to measure sensors which output negative voltage The V Link should not be used with sensors with an impedance of greater than 5000 ohms Users are always welcome to contact MicroStrain sales or support to discuss specific sensor applications in more detail 27 MicroStrain Inc Temperature Sensor General Information e The V Link has an on board solid state temperature sensor mounted on the surface of the circuit board e Specifications for this National Semiconductor Model LM60 sensor may be found at http www national com mpf LM LM60 html e The temperature sensor output is presented on channel 8 of the V Link e The temperature sensor has a measurement range of 25 C to 7
63. n spreadsheet format assuming you have Microsoft Excel installed This indicates that the data from Trigger 1 was successfully saved to file on your PC Close the spreadsheet Click OK on Trigger Browser window Operating several nodes in datalogging mode broadcast method Establish communication with several nodes on the same frequency under one base station Configure each node individually for a datalogging session as described the Operating one node in datalogging mode section above Normally all nodes would be set to the same sample rate sweep rate channel actions etc for any given session but there is no requirement to do this Right click the base station and a drop down menu appears Click Broadcast and the broadcast menu appears Click Erase A confirming message box will appear Click Yes A progress bar will appear and disappear This indicates that the datalogging memory of the all the nodes was successfully erased Click Broadcast and the broadcast menu appears Click Trigger The trigger datalogging command will be broadcast to all nodes The activity LED on the nodes or elapsed time should be observed to determine when the datalogging session has ended There is no individual response to Agile Link from the nodes when they are completed datalogging Note Any number of datalogging sessions can be run consecutively before downloading Please review the Datalogging Memory section of this manual for capacity det
64. nalysis tools records the data to file and allows the user to configure and actuate the system The V Link may also be used with MicroStrain s Analog base station for stand alone applications The V Link may be deployed up to 70 meters line of sight from its base station and 100 meters or more with added antenna options The V Link has a long life internal battery and may be remotely deployed in number of applications including bridges machinery aircraft production lines and the like Multiple V Link s may be deployed around a single base station each transmitting its data to the base station coincidentally with the data being passed on to the software for aggregation MicroStrain Inc Installation We suggest these three steps to install your V Link 1 Install the Agile Link software by following the directions given in the Software Installation section of this manual 2 Remove the contents of your V Link starter kit e Install the antenna on the base station antenna connector Tighten hand tight do not over tighten e If you have a serial base station see Figure connect the RS 232 cable to a serial port on your PC and to the serial base station RS 232 connector Connect the external power supply to the power connector on the serial base station and plug it into a proper power receptacle Turn the serial base station power switch on and the green LED will illuminate indicating the base station 1s
65. nd higher G forces These provisions will allow the V Link to operate in excess of 550 g These provisions can include any or all of the following e The cavity of the standard enclosure is filled with an epoxy adhesive The epoxy fills all voids between the enclosure and the circuit board assembly The epoxy provides outstanding thermal shock impact and vibration resistance e The radio and microprocessor crystals are replaced with higher rated crystals e The external mast antenna and its mount are replaced with a short insulated wire lead The lead extends from the enclosure and is pliable 44 MicroStrain Inc Operating Temperature The V Link with its standard internal battery and standard enclosure will operate between 20 C and 60 C The battery and enclosure limit this range The V Link electronics alone will operate between 40 C and 85 Extended temperature ranges can be achieved with custom batteries and enclosures Please contact a MicroStrain Sales Engineer with your requirements 45 MicroStrain Inc Sampling Rates As described in more detail elsewhere in this manual the V Link has four sampling modes being 1 Datalogging 2 Streaming 3 Low Duty Cycle and 4 High Speed Streaming Each of these modes supports a unique set of sampling rates In Datalogging and Low Duty Cycle modes you may choose the sampling rate for the session In Streaming and High Speed Streaming the sampling rate 15
66. nd the sensors attached to them are sampled and the data acquired is blipped to base station and software The data is not written to non volatile memory during LDC LDC can either be finite have a user defined start and end time or continuous continue until the power is cycled on the node 11 MicroStrain Inc Node The node 15 the wireless transceiver that carries the sensors and provides communication with the base station The G Link V Link SG Link and TC Link are all nodes Ping A byte is transmitted by the base station to a particular node and the node responds by echoing the byte indicating communication exists between the base station and the node Plugins Software wizards which aid in the configuration of the node s sensors Range Test A continuous string of pings used to validate communication between the base station 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 SEDT Sensor Event Driven Trigger is a method whereby a ceiling or floor output threshold can be set in the node to automatically trigger datalogging Sleep A command transmitted to the node to set a node into sleep configuration Streaming Streaming is a node action whereby all active channels and the sensors attached to them are sampled and the data acquired is transmitted to the base station and software The data 15 no
67. nnection and is operated with MicroStrain s Agile Link software The Serial base station under instruction from the software wirelessly communicates with the Agile Link nodes alternately sending commands and configurations and receiving responses and data The Serial base station sends all of the commands available to the nodes including ping datalog stream data erase read and write EEPROM etc The Serial base station in turn receives acknowledging responses from the nodes and passes datalogging downloads streaming data high speed streaming data and low duty cycle data to the host computer The Serial base station is capable of maintaining communications with multiple nodes Its broadcast mode allows the simultaneous issuance of several commands to multiple nodes 18 MicroStrain Inc Differential Input Channels The V Link has four differential input channels These channels are designed to accommodate strain gauges with 350 ohm resistance or greater The V Link by default is configured to support a full Wheatstone bridge installation The V Link can also be ordered from the factory configured to support half and quarter bridge installations It 1s important to know how your V Link has been configured before proceeding with use You may wish to check your invoice or you may inspect the circuit board assembly for factory applied completion resistors The location of these completion resistors are described in Appendix
68. nsorlSens Input This 15 the input for three wire mode on quarter Three Wire Input bridge strain gauge bridges Leave unconnected for non quarter strain gauge bridge applications Pin 15 Channel 1 Sensorl Input This is the negative input to the channel 1 PGA Sensor Differential Amplifier Input Pin 16 Sensor Power Sensor Output This signal provides output power to external Power Out sensors This output is only active on when the unit is sampling the sensors Maximum combined load on this pin and pin 9 is 50 mA Pin 17 Ground Ground N A This is the system ground This provides the reference to which signal inputs are measured and provides a return for power supply Pin 18 Channel 2 Sensor2 Input This is the negative input to the channel 2 PGA Sensor Differential MA Amplifier Input Pin 19 Channel 2 Sensor2Sens Input This is the input for three wire mode on quarter Three Wire Input bridge strain gauge bridges Leave unconnected for non quarter strain gauge bridge applications Pin 20 Channel 2 5 2 Input This is the positive input to the channel 2 PGA Sensor Differential Amplifier Input Pin 21 AnalogOutputl Pin 22 AnalogOutput2 Pin 23 AnalogOutput3 Pin 24 Analog Single Ain7 Input This input is a single ended 0 3 volt input for Ended Input 7 transducers and or signal conditioners that provide a high level voltage output This signal connection is routed directly to channel 7 on the A D converte
69. nt calibration using a method of their own design The 3 volt signal is digitized by the V Link s 12 bit A D converter creating a 0 to 4096 bit digital range As explained elsewhere the Agile Link system operates digitally by resolving all sensor voltages to bits transmitting the bits by radio to base station carrying the bits into host software and finally returning these bits to volts at the software level Agile Link software further provides an on board function Strain Wizard which allows engineering units microstrain to be output and displayed directly from the software Please refer to the Strain Wizard Help in the Agile Link software for detailed use In the pages following you will find wiring diagrams which detail the specifics for installing quarter half and full bridges Please also refer to the Terminal Block Connectors section for other important details and practice 19 MicroStrain Inc A word of caution Strain gauges with resistance below 350 ohm in particular 120 ohm gauges may be used with V Link although they are not recommended The nature of 120 ohm gauges is such that temperature 15 a critical factor in their performance and the user should be aware of the effects of temperature on the measurements derived Finally the science and use of strain gauges 15 a large subject MicroStrain sales and support are always available to discuss your particular requirements 20 Micr
70. oStrain Inc Connecting a quarter bridge strain gauge This example assumes the V Link is configured with the optional internal quarter bridge completion resistors If not the completion of the bridge shown as internal circuitry must be completed externally The three wire arrangement 1s recommended in order to cancel thermal effects of the lead wire resistance RL It is strongly recommended that shielded wiring be used as this can significantly reduce system noise Please note that the shield of each cable must be grounded at one location only to prevent the occurrence of ground loops Shielded wiring can be purchased from Alphawire part number 1122 www alphawire com a sample is included with each starter kit Internal Circuitry Sensor Power Shield Drain 7 1 Sensor Sense RL 1 Sensor Rg Active Sensor Ground RL Lead Resistance Figure 2 Sensor Channel Sense Pin Signal S Pin Signal Ground Pin _ 10 8 O o 07 8 2 Table 4 21 MicroStrain Inc OPTIONAL POWER SUPPLY Figure 3 22 MicroStrain Inc Connecting a half bridge strain gauge This example assumes the V Link is configured with the optional internal half bridge completion resistors If not the completion of the bridge shown as internal circuitry must be completed externally I
71. ode the total number of nodes that can be simultaneously sampled 15 dependent on the number of active channels and the sampling rate As the number of active channels increases and or sampling rates increase the total number of nodes that can be sampled falls Likewise as the number of active channels decreases and or sampling rates decrease the total number of nodes that can be sampled increases In the High Speed Streaming sampling method you may trigger a high speed streaming session on up to 16 V Link s at the same instant by broadcasting a high speed streaming command from multiple base stations to each base station s corresponding node In this case a base station would be deployed for each node and each pair would be set to a separate frequency so as not to conflict with other pairs All nodes would receive the command and independently stream their data to the paired base station MicroStrain s High Speed Streaming software 1s capable of handling only 1 node base station pair application developers would be able to operate up to 16 pairs in this fashion This limit of 16 results from the number of available frequencies within the band frequency of the V Link radio The analog base station has an additional feature relating to sampling methods It normally is configured to support up to 8 channels of data from a single node However it may be configured to support up to 8 nodes that 15 to say 1 may be configured to handle one channe
72. of the parties Products and services rendered by MicroStrain are done so only accordance with these Terms and Conditions of Sale If any provisions within these terms and conditions are found to be invalid by any court having competent jurisdiction the invalidity of such provisions shall not affect the validity of the remaining provisions of these terms and conditions which shall remain in full force and effect 2007 MicroStrain Inc All rights reserved The Products Software and Embedded Software may be protected by U S patents with other patents pending in the U S A and elsewhere MICROSTRAIN MICROSTRAIN and Logo DEMOD DC DVRT AIFP STRAINLINK EMBEDSENSE FAS G FAS E FAS A 3DM 3DM DH 3DM G 3DM GXI 3DM GX2 INERTIA LINK MICRO SENSORS BIG IDEAS LITTLE SENSORS BIG IDEAS V LINK G LINK SG LINK TC LINK STRAIN WIZARD NODE COMMANDER RHT LINK SG LINK TORQUELINK and other marks indicated on our website and the logo forms of the foregoing marks are trademarks and or service marks of MicroStrain Inc and may be registered the United States or in other jurisdictions including internationally MicroStrain Inc s trademarks service marks and trade dress may not be used in connection with any product or service that 1s not affiliated with MicroStrain Inc in any manner that is likely to cause confusion among customers or in any manner that disparages or discredits MicroStrain Inc All other trademarks not owned by
73. of the nodes and the menu appears You can deal with individual nodes as before to Stop Monitoring and or to Save Stream You may also click Stop All Monitoring to stop sampling all the nodes at once To return to normal operations all nodes must be stopped Note The Monitor For Any Node checkbox can be utilized to collect all nodes transmitting LDC or to limit collection to only those nodes selected Likewise the Remove Node or Remove Nodes menu items can be used to throttle collection To close the Data Collector window click its upper right hand X eal Time Graph 2 Data Collector Data View v C Monitor for any node Node Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Tm Node 161 4 99445 us 4094 bits 4094 bits 4094 bits Node 245 2046 bits 0 022692 Node 259 3 11516 ps 0 024888 Node 362 5 71589 us 4 8032 us 1 27637 15 3 50087 us 1 0 442215 us Node 531 Stop Monitoring Remove Stop Monitoring Remove Nodes 4 Additional Notes e case of multiple nodes Low Duty Cycle is not expected to and will not deliver every data sample that 1s transmitted Contention occurs and the more nodes you add and the higher sampling rates that you apply add to the overall loss of packets A time stamp based on host time writes out with each row of data in files saved from sessions 1 Hz or slower 76 MicroStrain Inc Appendix 5 High Sp
74. on once initiated The data will be written to the memory on board the V Link during the session In continuous datalogging the one session will last until the memory 15 full Multiple finite datalogging sessions may be conducted with the V Link before its memory is full No data is transmitted over the air to the base station during datalogging When datalogging is completed one or more sessions the software provides for the data to be downloaded from the V Link through the base station The software parses the data into CSV formatted files for further analysis In the STREAMING sampling method the V Link sampling rate is directly dependent on the number of sensor channels which are active With channel active the channel 13 MicroStrain Inc will be sampled at a rate of 736 samples per second with 4 channels active each channel will be sampled at a rate of 565 samples per second with 8 channels active each channel will be sampled at a rate of 424 samples per second Streaming duration can be finite or continuous In finite streaming a sampling duration is set and the streaming session will last the duration once initiated In continuous streaming the streaming session will last until the host software stops the session or the power is cycled on the V Link The data is transmitted over the air to the base station during streaming no data is written to the on board memory during the session During streaming the software re
75. ond for each active channel 100 samples per second for each active channel 50 samples per second for each active channel 46 MicroStrain Inc 25 samples per second for each active channel 10 samples per second for each active channel 5 samples per second for each active channel 2 samples per second for each active channel 1 sample per second for each active channel 1 sample every 2 seconds for each active channel 1 sample every 5 seconds for each active channel 1 sample every 10 seconds for each active channel 1 sample every 30 seconds for each active channel 1 sample every 60 seconds for each active channel 1 sample every 2 minutes for each active channel 1 sample every 5 minutes for each active channel 1 sample every 10 minutes for each active channel 1 sample every 30 minutes for each active channel 1 sample every 60 minutes for each active channel High Speed Streaming The sampling rate is a function of the number of active channels If 1 channel 15 active the sampling rate will be 4 000 samples per second for the channel If 2 channels are active the sampling rate will be 2 000 samples per active channel per second If 3 channels are active the sampling rate will be 1 333 samples per active channel per second If 4 channels are active the sampling rate will be 1 000 samples per active channel per second If 5 channels are active the sampling rate will be 800 samples per active channel per second If 6 channels ar
76. pper right hand corner of the Channel Actions window to close it To proceed to Low Duty Cycle right click the node and the drop down menu will appear Click Low Duty Cycle Made 259 Stream Datalogai Ping Range Test Power Management R ead Write EEPROM Load Made Information Configure Frequency Plugins kr Remove Mode Click Start and Low Duty Cycle begins sampling and displaying A Data Collector window 15 spawned in the graphing area RealTime Graph YA Data Collector Data View Monitor for any node Node Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Chane Node 259 3 89395 ps 0 022692 Timer Tick 55 Sample Rate 1Hz lt n 72 MicroStrain Inc As Low Duty Cycle samples are received from the node their values will be displayed by channel If engineering units have been applied by Channel Actions the units will display in those units otherwise all values will be in raw bits Click the sign to the left of the node and a tree of information will display indicating current Timer Tick read Sweep and the current Sampling Rate Select Graph View from the drop down above the channel headers and the Low Duty Cycle graphing window will appear Click the node in the Available Node frame and a real time graph will appear and graph the samples as they arrive Real Time Graph Data Collector G
77. pplied recycled Active and idle Throbbing on and off every second Datalogging Illuminates continuously Streaming High Speed Streaming Low Duty Cycle Ping Range Test Blips on off at high rate giving appearance of continuous illumination Sleep Faint blip on off based on Check Radio Interval Table 8 The Device Status LED has several states during error operation LED appearance Radio error Blinks slowly 4 times on boot up On board 2MB flash memory error Blinks slowly 5 times on boot up Table 8A 33 MicroStrain Inc Radio and Antenna The V Link and its base station employ 2 4 GHz IEEE 802 15 4 compliant radio transceiver for wireless communication The radio complies with ETSI EN 300 328 EN 300 440 class 2 CFR 47 part 15 STD T66 The radio is license free worldwide The radio 15 a direct sequence spread spectrum radio and be configured to operate on any of 16 separate frequencies ranging from 2 405 GHz to 2 480 GHz Following the 802 15 4 standard the Agile Link family aliases these frequencies as channel 11 through channel 26 and the V Link 9 default setting 1s equivalent to 2 475 GHz channel 23 The V Link has 2 4 GHz omni directional right angle wave antenna extending from the faceplate of the V Link The antenna is mounted to a male reverse polarity SMA connector 5 extending through the enclosure from the circuit board assembly Antenna specif
78. quency All nodes would receive the command and independently perform their datalogging session Each node would be downloaded separately In the Streaming sampling method you may trigger a streaming session on up to 16 V at the same instant by broadcasting a streaming command from multiple base stations to each base station s corresponding node In this case a base station would be deployed for each node and each pair would be set to a separate frequency so as not to conflict with other pairs All nodes would receive the command and independently stream their data to the paired base station Agile Link software is capable of handling up to 4 node base station pairs application developers would be able to operate up to 16 pairs in this fashion This limit of 16 results from the number of available frequencies within the band spectrum of the V Link radio In the Low Duty Cycle sampling method multiple V Link 9s can share the same frequency since each node is not transmitting continuously You may start a low duty cycle session on any number of V LinkGs at the same instant by broadcasting low duty cycle command from one base station to all the nodes nodes receive the command and independently begin transmitting their low duty cycle data The base station receives the data from all the nodes and passes it on to the host software It should be noted here that when using multiple nodes with one base station in low duty cycle m
79. r Note The source impedance should be less than 5K ohms Table 7 con t 31 MicroStrain Inc LEDs The V Link has three LED indicators on its sidewall The LEDs signal the various operating states of the V Link to the user Charging Charge Complete Device Status M Figure 9 Charging LED The red Charging LED illuminates when the external power supply is connected continues to illuminate while the internal battery charging circuit is active When the internal battery 15 fully charged the LED turns off in favor of the green Charge Complete LED The red Charging LED will also turn off if the external power supply is removed prior to full charge Charge Complete LED The green Charge Complete LED will illuminate only during a charging session and only when the battery is fully charged The green Charge Complete LED will turn off if the external power supply is removed Device Status LED The green Device Status LED indicates the current state of the V Link When the V Link is switched on the green Device Status LED will rapidly flash several times and in a moment begin throbbing on and off every 1 second The rapid flashes indicate a successful boot up The throbbing indicates that the V Link 9 is active and in an idle state 32 MicroStrain Inc The Device Status LED has several states during normal operation State Booting up Rapidly flashes 10 times when power is a
80. raph View C Monitor for any node Avallable Nodes Zk Node 259 Node 259 Monitoring _ e Sweep Value e 10 Timer Ticks Select Data View from the drop down above the channel headers and the Low Duty Cycle data window will reappear In finite Low Duty Cycle sampling will progress until the number of sweeps set in the Configuration has been reached Note The Agile Link software does not signal the user when a finite LDC session has completed It will continue to monitor for any samples coming from the node The user by observation of the Data View observation of the activity LED on the node etc must intervene to continue By right clicking on the node in the Data Collector window you receive various menu items 259 Stop Monitoring Remove Stop All Monitoring Remove All Nodes 73 MicroStrain Inc To stop Low Duty Cycle sampling click Stop Monitoring To save the Low Duty Cycle session to file click Save Stream A Save As window will appear allowing you to name and save the session data Click OK To close the Data Collector window click its upper right hand X To return to normal node operations right click the node in the Localhost frame to get its main menu Note you are using continuous Low Duty Cycle sampling or want to prematurely stop a finite Low Duty Cycle sampling you may do so using the Stop Monitoring and Save Stream software functions However the nod
81. roduct Embedded Software MicroStrain grants to Buyer a non exclusive paid up license to use one copy of the Software on one computer subject to the following provisions Except as otherwise provided in this Software License applicable copyright laws shall apply to the Software and Embedded Software Title to the medium on which the Software is recorded or stored is transferred to Buyer but not title to the Software or the Embedded Software Buyer may use Software on a multi user or network system only if either the Software is expressly labeled to be for use on a multi user or network system or one copy of the Software is purchased for each node or terminal on which Software is to be used simultaneously Buyer shall not use make manufacture or reproduce copies of Software or Embedded Software Buyer may use a copy of the Software on one computer and is permitted to make additional copies of the Software only for backup or archival purposes Customer is expressly prohibited from disassembling or reverse engineering the Software or Embedded Software All copyright notices shall be retained on all authorized copies of the Software and Embedded Software 8 Limited Warranty MICROSTRAIN WARRANTS 1 ALL PRODUCTS EXCEPT SPARE PARTS OR REPLACEMENT PARTS AND SPARE KITS FOR A PERIOD OF ONE 1 YEAR AND 11 ALL SPARE PARTS OR REPLACEMENT PARTS AND SPARE KITS FOR A PERIOD OF NINETY 90 DAYS WHICH ARE MANUFACTURED BY MICROSTRAIN SHALL BE FREE FRO
82. rometer 2002 full scale range 0 75 0 75 1 0 ACCEL TRIAX 3031 500 Triaxial Accelerometer 5002 full scale range 0 75 x0 75 x1 0 CHARGER A INT V Link wall mount charging unit 100 240 VAC at 50 60 Hz input with 9VDC at 560mA output Table 3 con t 10 MicroStrain Inc Common Terms These terms are in common use throughout the manual e Address Each node has a unique address from to 65534 which identifies the node to the base station and software e Base Station The transceiver base station attaches to your host computer and provides communication between the software and the node s e Bits The digital equivalent of voltage on the node The node excites all sensor circuits with 3 Volts The return from the sensor 15 to 4096 bits representing 0 to 3 volts e Broadcast Any of a number of commands trigger sleep erase etc transmitted at the same instant to multiple nodes e Browse Triggers The software action whereby one can display and analyze the datalogging sessions in CSV format e Channel Actions Coefficients contained on board the node to instruct the host software to scale engineering units e Configuration A general term applied to the node indicating the streaming or datalogging environment The number of active channels sampling rate offset hardware gain etc are all components of a node s configuration e Continuous A term used to describe a sampling session datalogging s
83. rvice cannot be tracked to ensure delivery Since MicroStrain cannot provide credit for a return without confirming its receipt we recommend that you use a delivery service that can be tracked and or insured Normal turn around for RMA items is 7 days from receipt of item by MicroStrain 58 MicroStrain Inc 30 Day Return Policy All stock product orders from MicroStrain may be returned within 30 days for a full refund In order to return or exchange all or part of your order you must contact us for a Return Merchandise Authorization number RMA Call toll free 800 449 3878 to obtain an RMA from a MicroStrain representative All returned merchandise must be in the original packaging including manuals accessories cables etc with the authorization RMA clearly printed on the outside of the package Return requests must be made within 30 days of the receipt date All free items must be returned together with purchased items in order to receive a full refund Any shipping and or handling charges on the original order cannot be refunded At our discretion we may levee a restocking fee of 15 of the cost of items returned MicroStrain is not responsible for shipping costs or damage on returned items Units to be returned should be packed carefully Please be advised that packages sent by normal US Postal Service cannot be tracked to ensure delivery Since MicroStrain cannot provide credit for a return without confirming its receipt we
84. ssion of approximately 6 79 seconds has been set Click Apply Click OK Click View in the menu bar Click Channel Actions The Channel Actions windows will appear Click the Resync button Channel 1 will now have the Strain action in place indicating that the V Link will output engineering units in microstrain Click the small red X in the upper right corner of the Channel Actions window to close the window Right click on the node icon label and a pop up menu will appear Click Stream Click Start The node will start streaming strain in engineering units microstrain and display channel 1 as an advancing plot on the Real time Graph The Y axis will auto scale engineering units and will report channel 1 green at or near microstrain The channel plots will continue along the X axis until 5000 sweeps 6 79 seconds has elapsed This indicates that the node 15 successfully streaming its sensor data Move your mouse pointer within the black area of the Real time Graph Right click and a pop up menu will appear Click Save Stream A Save As dialog box appears Accept or modify the File Name for the CSV file that will be saved Click Save The dialog box will disappear This indicates that the streaming data was successfully saved to file on your PC 69 MicroStrain Inc Operating up to 4 nodes in streaming mode broadcast method Establish communication with up to 4 nodes each paired with a separate base station and each pair on
85. t is strongly recommended that shielded wiring be used as this can significantly reduce system noise Please note that the shield of each cable must be grounded at one location only to prevent the occurrence of ground loops Shielded wiring can be purchased from Alphawire part number 1122 www alphawire com a sample is included with each starter kit Shield Drain Sensor Power S i Rg Active Ground Ground Rg Active RL Lead Resistance NENNEN 10 8 2 NEN NENNEN 25 ALI BRIDGE 3 JIN _ amp NO OO On O1 2 ACTIVE ACTIVE Ey oae e ACTIVE N A HALF OPTIONAL POWER SUPPLY CA MicroStrain Inc s N Figure 5 24 MicroStrain Inc Connecting a full bridge strain gauge This example assumes the V Link is configured with the optional internal full bridge completion In this arrangement the user is responsible for all bridge completion It is strongly recommended that shielded wiring be used as this can significantly reduce system noise Please note that the shield of each cable must be grounded at one location only to prevent the occurrence of ground loops Shielded wiring can be purchased from Alphawire part number 1122 www alphaw
86. t written to non volatile memory during streaming Streaming can either be finite have a user defined start and end time or continuous continue until the power 15 cycled on the node Sweep Rate A node setting which determines the number of times all active channels are sampled during a finite sampling session Trigger A command transmitted to the node to begin a datalogging session Wake A command transmitted to the node to recover a node in sleep configuration 12 MicroStrain Inc Operation Let s discuss the operation of the V Link and base station in conjunction with the Agile Link host software The V Link has four differential input channels strain channels three single ended input channels analog channels and an on board temperature sensor channel The V Link samples these eight channels using four different selectable methods The data 1s either stored temporarily on board the V Link or immediately transmitted to a base station depending on the sampling method The base station is read by the host software as data 15 received and the host software displays and or saves the data to file The four differential inputs are assigned to channels 1 2 3 and 4 the three single ended inputs are assigned to channels 5 6 and 7 and the on board temperature sensor 15 assigned to channel 8 The differential channels with their connected sensors are excited with 3 volts and the resultant is first passed through a 2 s
87. tage amplification being a fixed instrumentation amplifier and a user programmable gain amplifier with programmable offset on through an anti aliasing filter 3dB down 500 Hz low pass filters with cutoff 500 Hz and into the 12 bit A to D converter The three single ended inputs with their connected sensors and the temperature sensor are excited with 3 volts and feed directly into the 12 bit A to D converter The 12 bit A to D converter sends the eight channels to the microprocessor The firmware in the microprocessor processes the digital sampling into raw data and depending on the sampling method selected either writes the data as it is captured to the flash memory or sends the data through the serial communication interface to the radio transceiver The transceiver in turn transmits the data to any listening base station Please refer to the Electrical Block Diagram section of this manual for a visual representation of the V Link base station and host software operation Please refer to the Differential Input Channels and Single Ended Input Channels sections of this manual for an in depth discussion of their use and operation In the DATALOGGING sampling method the V Link may be configured to sample data as fast as 2048 samples per channel per second to as slow as 32 samples per channel per second Datalogging can be finite or continuous In finite datalogging a sampling duration is set and the datalogging session will last the durati
88. tively the sensor can be powered with 3 volts by any external constant source In this case the current draw of the sensor will not compromise the V Link 1 it may exceed 50 mA Typical wiring to the V Link would follow the patterns exampled below Please refer to the Terminal Block Connectors section for more details In our first example let s use a photocell that requires power from the V Link The photocell presents 3 leads lead 16 the power lead lead 2 is the ground lead and lead 3 is the signal lead In this case connect lead to pin 9 P connect lead 2 to pin 1 GND and connect lead 3 to pin 4 Ain5 In our second example let s use a photocell that is being powered externally The photocell presents 2 leads lead 1 is the ground lead and lead 2 1s the signal lead In this case connect lead to pin 1 GND and connect lead 2 to pin 4 Ain5 The 3 volt signal is digitized by the V Link s 12 bit A D converter creating a 0 to 4096 bit digital range As explained elsewhere the Agile Link system operates digitally by resolving all sensor voltages to bits transmitting the bits by radio to base station carrying the bits into host software and finally returning these bits to volts at the software level O volts O bits 2048 bits 1 5 volts 4096 bits 3 volts and so forth To state it as a formula 3 Volts 4096 bits 0 000732 bits per volt The volts recreated on the host side ca
89. treaming LDC HSS where the time length of the session is undefined e Cycle Power A command transmitted to the node to re boot the node Datalogging Datalogging is a node action whereby all active channels and the sensors attached to them are sampled and the data acquired 15 written to non volatile memory on board the node The data is not transmitted to the base station and software during datalogging Datalogging can either be finite have a user defined start and end time or continuous continue until all datalogging memory 15 consumed Download Download 15 the node action whereby the node transmits all of its datalogging data to the base station and software for file saving e Erase A command transmitted to the node to erase all datalogging sessions e Finite A term used to describe a sampling session datalogging streaming LDC HSS where the time length of the session is defined e High Speed Streaming High Speed Streaming HSS is a node action whereby all active channels and the sensors attached to them are sampled and the data acquired is transmitted to the base station and software The data is not written to non volatile memory during HSS HSS can either be finite have a user defined start and end time or continuous continue until the power is cycled on the node It differs from Streaming in that it offers faster data rates e Low Duty Cycle Low Duty Cycle LDC is a node action whereby all active channels a

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