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(NI ELVIS) User Manual

1. sss 0 2596 Software controlled resolution 7 bits Current limiting eee 0 5 V at 130 mA 5 V at 290mA 12 V at 450mA Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common mode voltage Channel to earth esses x20 V Installation Category I Channel to channel x20 V Installation Category I Environmental Operating temperature 0 to 40 C Storage temperature sse 20 to 70 C Humidity i een 10 to 9096 relative humidity noncondensing Pollution Degree indoor use only 1 1 Total current drawn from 15 V and the negative variable power supply cannot exceed 500 mA National Instruments Corporation A 7 NI ELVIS User Manual Appendix A Safety Ej Specifications This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL 61010 1 e CAN CSA C22 No 61010 1 Note For UL and other safety certifications refer to the product label or to ni com Electromagnetic Compatibility Ez EtnSSIORS 3 EE iere Ec EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Hirn e EN 61326 1997 A2 2001 Table 1 CE C Tick and FCC Part 15 Class A Compliant Note For EMC compliance operate this device with
2. FEED O ma E Suri Mex Cp 1 Al Oscilloscope and Programmable 6 DMM AO Function Generator Function I O Signal Rows User Configurable I O Variable Power Supplies DIO Signal Rows and DC Power Supplies Signal Rows LED Array 7 Power LEDs D SUB Connector 8 BNC Connectors Counter Timer User Configurable I O 9 Banana Jack Connectors and DC Power Supply Signal Rows nan Figure 3 2 Prototyping Board Parts Locator Diagram Prototyping Board Power The prototyping board provides access to a 15 V and a 5 V power supply You can use these voltage rails to construct many common circuits Refer to Appendix A Specifications for more information about these voltage rails NI ELVIS User Manual 3 6 ni com Chapter 3 Hardware Overview Prototyping Board Signal Descriptions Table 3 1 describes the signals on the NI ELVIS prototyping board The signals are grouped by the functionality section where they are located on the prototyping board Table 3 1 Signal Descriptions Signal Name Type Description ACH 0 5 4 General AI Analog Input Channels 0 through 5 4 Positive differential input to the AI channels ACH 0 5 General AI Analog Input Channels 0 through 5 Negative differential input to the AI channels AISENSE General AI Analog Input Sense Reference for the analog channels in nonreferenced single ended NRSE mode For more information
3. DAQ Hardware NI ELVIS is designed to interact with National Instruments E Series DAQ devices which are high performance multifunction analog digital and timing I O devices for PCI bus computers Supported functions on DAQ devices include AI AO DIO and timing I O TIO To use NI ELVIS the DAQ device installed in the computer connected to the NI ELVIS hardware must meet the following minimum requirements e 16 Al channels minimum sample rate of 200 kS s e Two AO channels e Eight DIO lines Two counter timers iyi Note NI ELVIS also supports 64 AI channel DAQ devices when used with the appropriate cable For cabling information refer to the E Series Help NI ELVIS does not support DIO only devices or the NI DAQPad 6020E for USB Using the DAQ Hardware in Bypass Mode NIELVIS communicates with the computer through the eight DIO lines of the DAQ device The Communications switch controls the routing of the DIO to the NI ELVIS In normal operation the switch is in Normal mode and the DIO lines are routed to the NI ELVIS hardware allowing software control When the Communications switch is set to Bypass mode the LED next to the switch is lit No communication changes occur unless you use the NI ELVIS Enable Communications Bypass VI in conjunction with putting the switch in Bypass mode After you move the switch and run the VI the DIO lines are routed to the DI lines on the prototyping board Figure 3 1 shows the location
4. National Instruments Corporation C 15 NI ELVIS User Manual Resource Conflicts The following table summarizes the resource conflicts you might encounter if you run certain NI ELVIS circuitry simultaneously The variable power supplies and digital circuitry are not included in this table because they do not create any resource conflicts National Instruments Corporation D 1 NI ELVIS User Manual Appendix D Resource Conflicts Function Generator Base Function Generator Ultrafine Function Generator Modulated ARB DAC lt 0 1 gt Oscilloscope Dynamic Signal Analyzer DMM Continuity Tester DMM Resistance Meter DMM Capacitance Meter DMM Inductance Meter DMM Voltmeter DMM Ammeter DMM Diode Tester Impedance Analyzer Bode Analyzer Two Wire Current Voltage Analyzer Three Wire Current Voltage Analyzer ze E o x 3 gt g 0 Gt E Es s MS 2 x 2 3 so Es F gt gt NOS 5 ss TT 292522 EC 97 5 5 5 erro 9 o T EE gt E 222 lt lt o E od woe S GO S A 68 cogo s 9 ey o Z E Io g 5 d o E ef OP uo 5408 88D Pos m so 00029 DE 7 SS EEST N od ooo 8052590909 BEELRZO e c ce Q 9 2 Oro gt lt A go o O O GO LS 5 8 88D ef ES ESEEEEER 2 FB 0 0 O m o 1 oO c c o c Qa O o fis Ll BD gt gt gt gt gt gt rereteq d Ad a2ob0dga5040450 BLE fg f
5. Y 4 8 NI ELVIS User Manual vi ni com Contents Appendix A Specifications Appendix B Protection Board Fuses Appendix C Theory of Operation Appendix D Resource Conflicts Appendix E Technical Support and Professional Services Glossary Index National Instruments Corporation vii NI ELVIS User Manual About This Manual Thank you for purchasing the National Instruments Educational Laboratory Virtual Instrumentation Suite NI ELVIS The NI ELVIS User Manual contains information that you need to understand and program the NI ELVIS architecture and instruments The NI ELVIS User Manual also discusses the components of an NI data acquisition DAQ system and the concept of virtual instrumentation 3 Note Refer to the Where to Start with NI ELVIS document if you need information about how to set up the components of the NI ELVIS Conventions The following conventions appear in this manual lt gt Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name for example DIO lt 3 0 gt The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box This icon denotes a note which alerts you to important information Pg This icon denotes a caution whi
6. NI ELVIS Motherboard NI ELVIS uses a monolithic function generator integrated circuit IC to generate waveforms This IC accepts frequency and amplitude modulation You can adjust the output amplitude of the XR 2206 with an internal 8 bit MDAC or manually with a knob on the NI ELVIS Benchtop Workstation control panel The coarse frequency is set by using one of four frequency selection capacitors The fine frequency is adjusted by the adjusting the onboard 8 bit DAC C 6 ni com Appendix C Theory of Operation The adjusted output signal is multiplexed into a unity gain circuit The output of the gain circuit runs through a 50 Q resistor NI ELVIS uses the function generator output signal FUNC OUT after the 50 Q resistor for other internal instruments You can disconnect the function generator from the NI ELVIS Prototyping Board with the prototyping board power switch Impedance Analyzer The NI ELVIS Impedance Analyzer is an SFP instrument that can measure specific device under test DUT impedance characteristics NI ELVIS determines impedance using an AC sine wave source that is produced by the NI ELVIS function generator on the CURRENT HI pin to excite the DUT The resulting sine waves are measured on CURRENT HI and CURRENT LO The NI ELVIS Impedance Analyzer breaks out the phase magnitude resistance and reactance of the DUT Block Diagram Figure C 4 shows a basic block diagram of the NI ELVIS impedance analyzer
7. Voltage Returned DC Voltage Read Offset x Gain Voltage Returned AC Gain x N VA Ce VDC Voltage Returned is displayed in the NI ELVIS software Current Meter When you use the current meter differential channel seven of the DAQ device AI 7 and AI 15 is used to read the current from NI ELVIS The current read from NI ELVIS is referenced to the NI ELVIS GROUND signal The current is measured across the CURRENT HI and CURRENT LO terminals The current flowing across the shunt is converted to voltage by a difference amplifier National Instruments Corporation C 3 NI ELVIS User Manual Appendix C Theory of Operation Block Diagram Figure C 2 shows a basic block diagram of the NI ELVIS current meter The paragraphs that follow the figure describe each section of the figure in more detail NI ELVIS User Manual Current Meter Signal Path A B C D Prototyping Protection Board NI ELVIS Motherboard DAQ Device Board i CURRENT HI i Fuses i Switches Shunt Diff Amp i o O oO T 0 Al 7 CURRENTLO LI MUX O r O r o OAI 15 Benchtop Workstation SIS Control d 1 i Panel i 7 i CURRENTHI Y CURRENTLO Figure C 2 NI ELVIS Current Meter Block Diagram Prototyping Board and Benchtop Workstation Connectors The input to the NI ELVIS current meter circuit can come from the NI ELVIS Prototyping Boar
8. Canadian Department of Communications This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe A respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada Compliance with EU Directives Users in the European Union EU should refer to the Declaration of Conformity DoC for information pertaining to the CE marking Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column The CE marking Declaration of Conformity contains important supplementary information and instructions for the user or installer Contents About This Manual Conventillo irte librado eii ix Related Documentation si ceni eii RE ER eee iia X Chapter 1 DAQ System Overview What is DA Viudas 1 1 DAQ Hard ware id dina aiii 1 2 LabVIEW x ogUERD A A AE 1 3 Virtual Instrumentation s ii eene eene 1 3 NEEL VIS Overview acier re EO ieee nates abe dee sa end ener dada 1 4 Safety Information ui ad ied te ito dg eq edge edes 1 5 Chapter 2 NI ELVIS Overview NLEL VIS Hardware serial e eee e a e reden 2 2 NI ELVIS Benchtop Workstation ea 2 3 NI ELVIS Prototyping Board eere 2 3 NI EBELVIS
9. Generic Analog Output NI ELVIS provides access to the two DAQ device DACs at the DACO and DACI terminals These channels are used by the NI ELVIS hardware for arbitrary waveform generation The output of the DAQ device is buffered and protected by the NI ELVIS hardware N Caution Other functions of NI ELVIS such as the DMM and FGEN internally use DACO and DACI and these functions can potentially interfere with the measurements The driver software generates an error message when there is a potential resource conflict NI ELVIS User Manual DC Power Supplies The DC power supplies output a static 15 V and 5 V For more information on the DC power supplies output refer to Appendix A Specifications Function Generator FGEN Access to the function generator on the prototyping board includes several additional terminals besides the function generator output signal FUNC OUT The SYNC OUT signal outputs a TTL compatible clock signal of the same frequency as the output waveform The AM IN and FM IN signals control the amplitude modulation AM and the frequency modulation FM respectively These signals are in addition to the fine 3 12 ni com Chapter 3 Hardware Overview frequency and amplitude controls on the benchtop workstation Software AM is controlled by DACO and software FM is controlled by DACI Variable Power Supplies The variable power supplies provide adjustable output voltages from 0 to 12 V on the SUPPL
10. NI ELVIS current amplifier vdc NI ELVIS variable power supplies do NI ELVIS digital output NI ELVIS User Manual D 2 ni com Technical Support and Professional Services Visit the following sections of the National Instruments Web site at ni com for technical support and professional services National Instruments Corporation Support Online technical support resources at ni com support include the following Self Help Resources For answers and solutions visit the award winning National Instruments Web site for software drivers and updates a searchable KnowledgeBase product manuals step by step troubleshooting wizards thousands of example programs tutorials application notes instrument drivers and so on Free Technical Support All registered users receive free Basic Service which includes access to hundreds of Application Engineers worldwide in the NI Developer Exchange at ni com exchange National Instruments Application Engineers make sure every question receives an answer For information about other technical support options in your area go to ni com services or contact your local branch at ni com contact Training and Certification Visit ni com training for self paced training eLearning virtual classrooms interactive CDs and Certification program information You also can register for instructor led hands on courses at locations around the world System Integration
11. Per Degree Q Ohm Plus or minus y Square root A AC ACH ADDRESS Amperes Alternating current Analog input channel signal The DIO output signals of the address bus O National Instruments Corporation G 1 NI ELVIS User Manual Glossary AI AIGND AISENSE AM AM IN amplification amplitude AO ARB block diagram BNC board bode plot bus NI ELVIS User Manual Analog input Analog input ground signal Analog input sense signal Amplitude modulation the process in which the amplitude of a carrier wave is varied to be directly proportional to the amplitude of the modulating signal Amplification modulation input signal A type of signal conditioning that improves accuracy in the resulting digitized signal and reduces noise The voltage amplitude of a signal When speaking of the amplitude of a signal it is usually assumed to be the RMS value for an AC signal However amplitude can also refer to the instantaneous amplitude or the peak peak to peak or average amplitude if so specified Analog output Arbitrary waveform generator Pictorial description or representation of a program or algorithm The block diagram consists of executable icons called nodes and wires that carry data between the nodes The block diagram is the source code for the VI The block diagram resides in the block diagram window of the VI A type of coaxial signal connector Refers to the DA
12. AO and counter timer applications by launching LabVIEW and selecting Find Examples Hardware Input and Output DAQ and then the type of example or you can find examples by selecting Find Examples and then searching for NI ELVIS National Instruments Corporation 4 1 NI ELVIS User Manual Chapter 4 Ej Programming NI ELVIS Note The DIO examples within LabVIEW do not work with the DIO lines of the NI ELVIS hardware Refer to the Using the DAQ Hardware in Bypass Mode section of Chapter 3 Hardware Overview for more information about using the communications bypass Analog Input A Caution ACH3 and ACH4 are used for Oscilloscope measurements on CH A and CH B respectively Do not connect signals to these channels on the prototyping board and the front panel BNC Scope connectors at the same time You can use NI ELVIS to measure up to six differential AI channels ACH lt 0 5 gt Note The DAQ device must be configured for differential AI mode before making connections to the NI ELVIS Benchtop Workstation For information on configuring the DAQ device refer to the Measurement amp Automation Explorer Help for NI DAQmx which you can access by launching MAX then selecting Help Help Topics NI DAQmx MAX Help for NI DAQmx ACH lt 0 5 gt on the NI ELVIS Prototyping Board directly connect to corresponding AI channels on the DAQ device ACH lt 0 5 gt can be used as normal input channels for any existing DAQ examples o
13. Software reti p EC on pe dede e ai c deo eie e Eee ba 2 3 SEP Instr mefts 25i e S attesa sr eri ee ert me Seca ee 2 3 Instrument Lache etre tre Eee 2 4 Arbitrary Waveform Generator ARB eene 2 4 Bode Analyzer toe tete ida 2 5 Digital Bus Reader haitiana 2 5 Digital Bus Writer uet te e liar 2 5 Digital Multimeter DMM essere 2 5 Dynamic Signal Analyzer DSA sse 2 6 Function Generator FGEN sss 2 6 Impedance Analyzer ie tees 2 6 Oscilloscope Scope iii 2 6 Two Wire and Three Wire Current Voltage Analyzers 2 7 Variable Power Supplies rper te Res 2 7 NI ELVIS LabVIEW AP peee et he e Ee ined tee eaten 2 7 NI ELVIS Calibration Utility eienn a a n 2 7 NI ELVIS in Academic Disciplines eese rennen 2 8 NE ELVIS m Engineering lieet oett oen 2 8 NI ELVIS in Biological Sciences seeeeee 2 8 NI ELVIS in Physical Sciences eese nenne 2 9 National Instruments Corporation V NI ELVIS User Manual Contents Chapter 3 Hardware Overview DAO Hardware Geneve e SA Nora Sida ate wende 3 1 Using the DAQ Hardware in Bypass Mode eee 3 1 NI ELVIS Benchtop Workstation eene rennen rennes 3 2 NI ELVIS Protection Boards 2 4 40 sore orte terit 3 5 NI ELVIS Prototyping Board eese ene reme 3 5 Prototyping Board Power ue eet
14. The DAQ device number is provided to identify the DAQ device that is cabled to the NI ELVIS Benchtop Workstation Refer to the DAQ documentation that shipped with the DAQ device for more information about device numbers The refnum that is passed between the API VIs contains information about the current configuration state If the configuration VI is used in a loop you should wire the refnum to shift registers so that the refnum information persists between loops Refer to the NI ELVIS Help for more information about the specific VIs in the DMM API Digital 1 0 The DAQ device digital lines are used to control the NI ELVIS Benchtop Workstation Therefore those lines are not directly accessible on the prototyping board However the benchtop workstation contains circuitry that multiplexes the DAQ DIO lines to provide digital input and output signals The DIO hardware can be controlled using the NI ELVIS instrument driver The driver allows the user to configure the digital operation and read or write 8 bit digital data A simple application to perform digital input is shown in Figure 4 4 National Instruments Corporation 4 7 NI ELVIS User Manual Chapter 4 Programming NI ELVIS Scope NI ELVIS User Manual Figure 4 4 Simple Digital 1 0 Input Application The digital operation is configured the digital data is returned and then the DIO reference is closed A simple application to perform digital output is shown
15. all measurements are made with respect to a common NRSE measurement system reference but the voltage at this reference can vary with respect to the measurement system ground Operational amplifier pre built amplifier modules that are general enough to be used almost anywhere an amplifier is needed Printed circuit board Peripheral Component Interconnect a high performance expansion bus architecture originally developed by Intel to replace ISA and EISA It is achieving widespread acceptance as a standard for PCs and workstations it offers a theoretical maximum transfer rate of 132 Mbytes s A measure of signal amplitude the difference between the highest and lowest excursions of the signal Programmable function input NI ELVIS User Manual Glossary PN potentiometer R RD ENABLE referenced signal sources resistance rms S S s SCANCLK Scope SYNC OUT T TIO TRIG NI ELVIS User Manual The simplest semiconductor structure It consists of a positive or P region containing positive ions in junction with a negative or N region containing negative electrons An electrical device the resistance of which can be manually adjusted used for manual adjustment of electrical circuits and as a transducer for linear or rotary position Read enable signal DIO output signal that indicates when data is being read from the read bus Signal sources with voltage signals that are referenced to a
16. installation documentation 1 xi NI ELVIS components benchtop workstation 3 2 DAQ device 3 1 overview figure 2 2 protection board 3 5 prototyping board 3 5 resource conflicts table D 2 specifications A 1 theory of operation C 1 using the hardware in bypass mode 3 1 help technical support E 1 NI ELVIS User Manual Index T O connectors I O connector descriptions 3 14 location figure 3 6 signal descriptions table 3 7 impedance analyzer resource conflicts table D 2 SFP overview 2 6 theory of operation C 7 installation category 1 6 documentation location 1 xi instrument drivers NI resources E 1 launcher 2 4 instrumentation virtual 1 3 K KnowledgeBase E 1 L LabVIEW NI ELVIS software instruments 2 3 overview 1 3 programming NI ELVIS digital I O 4 7 DMM 4 7 FGEN 4 6 overview 4 4 variable power supplies 4 5 virtual instrumentation 1 3 LATCH signal See also digital I O signal description table 3 8 launcher instrument 2 4 NI ELVIS User Manual 1 6 LED lt 0 7 gt signals connecting user configurable I O signals 3 14 signal description table 3 9 manual mode function generator 3 3 variable power supplies 3 3 National Instruments support and services E 1 NI ELVIS components figure 2 2 configuring 2 4 hardware overview 2 2 instrument launcher 2 4 LabVIEW API 2 7 overview 1 4 benchtop workstation 2 3 DAQ hardware 1 2 LabVIEW 1 3 prototypi
17. measurements e DC voltage e AC voltage e Current DC and AC e Resistance e Capacitance e Inductance e Diode test e Audible continuity You can connect to the DMM from the NI ELVIS Prototyping Board or from the banana style connectors on the front panel of the benchtop workstation National Instruments Corporation 2 5 NI ELVIS User Manual Chapter 2 NI ELVIS Overview NI ELVIS User Manual Dynamic Signal Analyzer DSA This instrument is especially useful in advanced electrical engineering and physics classes This instrument uses the analog input of the DAQ device to make measurements and can either continuously make measurements or make a single scan You can also apply various window and filtering options to the signal Function Generator FGEN This instrument provides you with choices for the type of output waveform sine square or triangle amplitude selection and frequency settings In addition the instrument offers DC offset setting frequency sweep capabilities and amplitude and frequency modulation Impedance Analyzer This instrument is a basic impedance analyzer that is capable of measuring the resistance and reactance for passive two wire elements at a given frequency Oscilloscope Scope This instrument provides the functionality of the standard desktop oscilloscope found in typical undergraduate laboratories The NI ELVIS Scope SFP has two channels and provides scaling and position
18. COMPONENTS AND TESTING FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN 2 IN ANY APPLICATION INCLUDING THE ABOVE RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY COMPUTER HARDWARE MALFUNCTIONS COMPUTER OPERATING SYSTEM SOFTWARE FITNESS FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION INSTALLATION ERRORS SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES TRANSIENT FAILURES OF ELECTRONIC SYSTEMS HARDWARE AND OR SOFTWARE UNANTICIPATED USES OR MISUSES OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER ADVERSE FACTORS SUCH AS THESE ARE HEREAFTER COLLECTIVELY TERMED SYSTEM FAILURES ANY APPLICATION WHERE A SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS INCLUDING THE RISK OF BODILY INJURY AND DEATH SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE TO AVOID DAMAGE INJURY OR DEATH THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM FAILURES INCLUDING BUT NOT LIMITED TO BACK UP OR SHUT DOWN MECHANISMS BECAUSE EACH END USER SYSTEM IS CUSTOMIZED AND DI
19. If you have time constraints limited in house technical resources or other project challenges National Instruments Alliance Partner members can help To learn more call your local NI office or visit ni com alliance Declaration of Conformity DoC A DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electronic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni com certification E 1 NI ELVIS User Manual Appendix E Technical Support and Professional Services Calibration Certificate If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front of this manual You also can visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events NI ELVIS User Manual E 2 ni com Glossary Symbol Prefix Value p pico 10 12 n nano 10 9 u micro 10 6 m milli 10 3 k kilo 10 M mega 106 Symbols Percent Negative of or minus Positive of or plus
20. Law V IxR C 12 ni com Appendix C Theory of Operation For R use the NI ELVIS feedback resistor CA Slope and for V use the AI 7 voltage Measured Current in Amps CH7 voltage CA Slope Measured Current is converted to milliamps and displayed Three Wire Current Voltage Analyzer The three wire measurement is made by using the DAQ device AO 0 and AO 1 to generate output voltages that you control The voltage is read before going into the DUT on AI 5 and AI 6 and then across the DUT on AI 7 The NI ELVIS Impedance Analyzer circuitry provides the feedback resistor that transforms the current flowing into the CURRENT LO pin into a voltage The CURRENT HI pin is the output current source for the DUT on the prototyping board This current is measured and converted to voltage by a 332 Q resistor on NI ELVIS The 3 WIRE pin is measured on Al 6 and is the source voltage that is swept Three Wire Current Voltage Analyzer Signal Path p A B C NI ELVIS Motherboard Prototyping Board DAQ Device DAC1 3 WIRE o AI6 ps CURRENT LO oO Al 7 DACO ANN CURRENT HI o Al 5 Figure C 8 Three Wire Measurement Block Diagram Internal Calculations The following values are stored in the NI ELVIS EEPROM CA SLOPE Actual value of each feedback resistor four values The voltage generated on the 3 WIRE pin is from the DAQ device AO 1 This voltage
21. National Instruments Web site at ni com info and enter the info code feedback 2003 2004 National Instruments Corporation All rights reserved Important Information Warranty The NI ELVIS hardware is warranted against defects in materials and workmanship for a period of one year from the date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace equipment that proves to be defective during the warranty period This warranty includes parts and labor The media on which you receive National Instruments software are warranted not to fail to execute programming instructions due to defects in materials and workmanship for a period of 90 days from date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period National Instruments does not warrant that the operation of the software shall be uninterrupted or error free A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instruments believes that the information in this do
22. OUT SYNC OUT AISENSE RP4 counter timer I O RP5 digital output NI ELVIS User Manual B 4 ni com Appendix B Protection Board Fuses Table B 2 Resistor Packs and NI ELVIS Components Continued Resistor Pack NI ELVIS Component RP6 digital input RP7 SCANCLK programmable function I O RP8 ADDRESS lt 0 3 gt Reinstalling the Protection Board Reinstall the NI ELVIS Protection Board before resuming use of NI ELVIS To replace the protection board complete the following steps 1 Reinsert the PCI connector of the protection board into the benchtop workstation rear connector 2 Tighten the four captive screws located on the back of the protection board Plug in the 68 pin cable and the power supply 4 Power on NI ELVIS National Instruments Corporation B 5 NI ELVIS User Manual Theory of Operation This appendix provides additional information about the basic operation of the NI ELVIS circuitry for the DMM function generator impedance analyzer two and three wire current voltage analyzers and analog output 3 Note To reduce measurement error calibrate the DAQ device before each session DMM Measurements The DAQ device is configured for differential measurement mode for all DMM measurements Each DMM reading is referenced to the NI ELVIS GROUND signal The NI ELVIS software typically sets the input signal limitations but some NI ELVIS SFP instruments allow you to ma
23. PIN lt 1 9 gt User Configurable I O D SUB Pins 1 through 9 Connection to D SUB pins Connecting Signals This section provides information about connecting signals between the NI ELVIS and the DAQ device Refer to Appendix D Resource Conflicts for a table showing possible resource conflicts when connecting NI ELVIS signals National Instruments Corporation 3 9 NI ELVIS User Manual Chapter 3 Hardware Overview Grounding Considerations Because the analog channels are differential you must establish a ground point somewhere in the signal path As long as the signal you are measuring 1s referenced to one of the NI ELVIS GROUND pins the measurement is correctly referenced If a floating source such as a battery is being measured be sure to connect one end of the signal to the NI ELVIS GROUND Terminals for the NI ELVIS GROUND signal are located at several locations on the prototyping board All these signals are tied together hy Note NI ELVIS does not support floating measurements Connecting Analog Input Signals This section describes how to connect AI signals on the NI ELVIS Prototyping Board Refer to the DAQ device documentation for more information about types of signal sources input modes grounding configurations and floating signal sources Generic Analog Input The NI ELVIS Prototyping Board has six differential AI channels available ACH lt 0 5 gt These inputs are directly
24. The diagrams and paragraphs that follow Figure C 4 describe the circuitry for the CURRENT HI and CURRENT LO signals Impedance Analyzer Signal Path p A B C NI ELVIS Motherboard Prototyping Board DAQ Device gt CURRENT HI Al 5 Function Generator i gt DUT CURRENT LO AI7 Figure C 4 Impedance Analyzer Block Diagram National Instruments Corporation C 7 NI ELVIS User Manual Appendix C Theory of Operation CURRENT HI The hardware connection to the CURRENT HI pin is shown in Figure C 5 The paragraphs that follow the figure describe each section of the figure in more detail Impedance Analyzer Signal Path p A B C Prototyping Protection Board NI ELVIS Motherboard Board Fuses Switch CURRENTHI o NO mn di Benchtop Workstation IMEEM M Control i 1 Panel AI5 O i i unction CURRENTHI i MUX MIX TS Generator o SO AL18 04 5 DAQ Device Figure C 5 CURRENT HI Block Diagram NI ELVIS Motherboard The output of the NI ELVIS hardware function generator is routed internally to the gain of the CURRENT HI pin The gain circuit labeled G in the preceding figure provides a resistive element labeled R in the preceding figure to always insure a minimum resistance CURRENT HI is routed to AI 5 for measurements Because the AI 5 voltage is measured after the onboa
25. This buffer prevents damage to the DAQ device The NI ELVIS is protected against overvoltage and overcurrent conditions C 14 ni com Appendix C Theory of Operation Figure C 3 shows a basic block diagram of the NI ELVIS AO circuitry The paragraphs that follow the figure describe each section of the figure in more detail DAQ Device AO lt 0 1 gt NI ELVIS Motherboard Prototyping 10K Board VV 15 15 10 100 VW VW DAC lt 0 1 gt 15 15 Figure C 9 Analog Output Block Diagram Prototyping Board and Benchtop Workstation Connectors The output channels of the NI EVLVIS DAC lt 0 1 gt can only be accessed on the prototyping board When the prototyping board is powered off the output is disconnected Protection Board The protection board has fuses for each output channel These fuses handle overcurrent conditions NI ELVIS Motherboard The DAQ device AO 0 and AO 1 are buffered on the NI ELVIS This buffer allows the NI ELVIS power supply to drive DACO and DACI The DAQ device provides the voltage but not the current The output signal is not adjusted for offset caused by NI ELVIS Refer to the Arbitrary Waveform Generator Analog Output section of Appendix A Specifications for further details DAQ Device The DAQ device must have analog output capability to use the NI ELVIS analog output In order to generate waveforms or patterns the DAQ device must have buffered output
26. communications switch location figure 3 2 overview 3 3 description 3 2 C calibration certificate NI resources E 2 utility 2 7 CH lt A B gt signals See also oscilloscope connecting analog input signals 3 12 signal description table 3 7 ni com CH A B signals See also oscilloscope connecting analog input signals 3 12 signal description table 3 7 communications switch location figure 3 2 overview 3 3 purpose 3 1 configuring NI ELVIS 2 4 conflicts resources table D 1 connecting signals on the prototyping board analog input DMM 3 11 generic analog input 3 10 grounding 3 10 oscilloscope 3 12 resource conflicts overview 3 11 table D 2 analog output DC power supplies 3 12 function generator 3 12 generic analog output 3 12 variable power supplies 3 13 counter timer signals 3 13 digital I O 3 13 user configurable signals 3 14 connectors See I O connectors conventions used in the manual xi counter timers connecting signals 3 13 DAQ hardware in bypass mode 3 2 resistor pack B 4 resource conflicts table D 2 CTRO GATE signal connecting counter timer signals 3 14 counter signal correlations table 4 3 signal description table 3 9 National Instruments Corporation 1 3 Index CTRO_OUT signal connecting counter timer signals 3 14 counter signal correlations table 4 3 signal description table 3 9 CTRO_SOURCE signal connecting counter timer signals 3 1
27. for measurements of NPN transistors hy Note Other types of transistors can be measured but these measurements are not currently supported by the SFPs Both instruments have cursors for more accurate onscreen measurements Variable Power Supplies You can control the output of the positive or negative variable power supply with these SFP instruments The negative power supply can output between 12 and O V and the positive power supply can output between O and 12 V 3 Note For a detailed explanation of the soft front panel instruments and instructions for taking a measurement with each instrument refer to the NI ELVIS Help For more information about the operation of the NI ELVIS circuitry refer to Appendix C Theory of Operation NI ELVIS LabVIEW API The NI ELVIS software also includes APIs to program four features of the NI ELVIS hardware the DIO DMM function generator and variable power supplies Refer to Chapter 4 Programming NI ELVIS for more information about using the APIs to program NI ELVIS hy Note For the VI reference for each API refer to the NJ ELVIS Help NI ELVIS Calibration Utility The NI ELVIS 2 0 software also includes a calibration utility that you can use to recalibrate the NI ELVIS variable power supplies or function generator circuitry National Instruments Corporation 2 7 NI ELVIS User Manual Chapter 2 NI ELVIS Overview NI ELVIS in Academic Disciplines You can use NI ELVIS in e
28. in Figure 4 5 Figure 4 5 Simple Digital 1 0 Output Application The digital operation is configured the digital data is output and then the DIO reference is closed The DAQ device number is provided to identify the DAQ device that is cabled to the NI ELVIS Benchtop Workstation Refer to the NI ELVIS Help for more information about the specific VIs in the DIO API The Oscilloscope component of NI ELVIS is not addressed in the instrument driver since you can use NI DAQmx to directly access its functionality 4 8 ni com Specifications This appendix lists the specifications of the NI ELVIS These specifications are typical after a 30 minute warm up time at 25 C unless otherwise noted 3 Note NI ELVIS includes a calibration utility so that you can recalibrate the circuitry for the variable power supplies and function generator Analog Input Refer to the Analog Input section of the DAQ device specifications documentation Arbitrary Waveform Generator Analog Output Number of output channels 2 Maximum frequency sese DC to DAQ device AO update rate 10 Full power bandwidth 27 kHz Output amplitude 10 V Resolution occcccccnncnnnninnnanananananananononos 12 bits or 16 bits DAQ device dependent Output drive current eee 25 mA Output impedance sess 1Q Slew Tale icici hints
29. instruments bode analyzer SFP 2 5 DMM SFP 2 5 DSA SFP 2 6 impedance analyzer SFP 2 6 NI ELVIS User Manual Index scope SFP 2 6 three wire current voltage analyzer SFP 2 7 two wire current voltage analyzer SFP 2 7 analog output connecting signals 3 12 DAQ hardware in bypass mode 3 2 hardware instruments function generator controls 3 3 overview 2 3 variable power supplies controls 3 3 overview 2 3 software instruments ARB SFP 2 4 FGEN SFP 2 6 variable power supplies 2 7 theory of operation C 14 API overview 2 7 programming NI ELVIS using NI DAQmx 4 1 programming NI ELVIS with the NI ELVIS API digital I O 4 7 digital multimeter 4 7 function generator 4 6 overview 4 4 variable power supplies 4 5 ARB resource conflicts table D 2 SFP overview 2 4 theory of operation C 14 NI ELVIS User Manual 1 2 BANANA lt A D gt signals connecting user configurable I O signals 3 14 connector locations figure 3 6 signal description table 3 8 benchtop workstation controls and indicators 3 2 overview 2 3 parts locator diagram 3 2 removing protection board B 1 theory of operation C 1 BNC lt 1 2 gt signals connecting user configurable I O signals 3 14 signal description table 3 8 BNC lt 1 2 gt signals connecting user configurable I O signals 3 14 signal description table 3 8 bode analyzer resource conflicts table D 2 SFP overview 2 5 specifications A 2 bypass mode
30. of 0 to 12 V variable power supply SUPPLY Variable Power Supplies Negative Output of 12 to O V variable power supply GROUND Variable Power Supplies Ground Prototyping board ground These two ground signals are DC Power Supplies tied together 15 V DC Power Supplies 15 V Source Output of fixed 15 V power supply referenced to the NI ELVIS GROUND signal 15V DC Power Supplies 15 V Source Output of fixed 15 V power supply referenced to the NI ELVIS GROUND signal 45V DC Power Supplies 5V Source Output of fixed 5 V power supply referenced to the NI ELVIS GROUND signal DO lt 0 7 gt DIO Digital Output Lines 0 through 7 Output of the write bus These channels are used byt the NI ELVIS Digital Bus Writer SFP to generate digital data WR ENABLE DIO Write Enable Active low signal that updates when DO lt 0 7 gt are updated LATCH DIO Latch Active low signal that pulses when data is ready on DO lt 0 7 gt GLB RESET DIO Global Reset Active low signal that is used to reset all of the NI ELVIS hardware settings NI ELVIS User Manual 3 8 ni com Chapter 3 Hardware Overview Table 3 1 Signal Descriptions Continued Signal Name Type Description RD ENABLE DIO Read Enable Active low signal that indicates data is being read from DI lt 0 7 gt DI lt 0 7 gt DIO Digital Input Lines 0 through 7 Input to read bus These channels are used byt
31. of the Communications switch National Instruments Corporation 3 1 NI ELVIS User Manual Chapter 3 Hardware Overview When in Bypass mode the hardware function generator and variable power supplies are still available through the manual controls The counter timers AI and AO on the DAQ device are also available The NI ELVIS SFP instruments notify you when the Communications switch is in Bypass mode Some SFP controls are dimmed when the Communications switch is moved to Bypass mode For detailed information about the DAQ device refer to the DAQ device documentation which you can download at ni com manuals NI ELVIS Benchtop Workstation This section describes the NI ELVIS Benchtop Workstation and the control panel on the front of the workstation Refer to Figure 3 1 for the parts locator diagram for the benchtop workstation NinsTRUMES INSTRUMENTS NI ELVIS VARIABLE POWER SUPPLIES SUPPLY SUPPLY FUNCTION GENERATOR SYSTEM POWER O we ae g 0 MANUAL O VOLTAGE VOLTAGE COARSE FREQUENCY 1 System Power LED 5 Function Generator FGEN Controls 2 Prototyping Board Power Switch 6 DMM Connectors 3 Communications Switch 7 Oscilloscope Scope Connectors 4 Variable Power Supplies Controls Figure 3 1 Control Panel Diagram of the Benchtop Workstation The benchtop wor
32. shielded cabling In addition all covers and filler panels must be installed CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows Low Voltage Directive safety 73 23 EEC Electromagnetic Compatibility Directive EMC esee 89 336 EEC Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column NI ELVIS User Manual A 8 ni com Protection Board Fuses This appendix describes the fuses on the NI ELVIS Protection Board and gives instructions on how to remove the protection board from the NI ELVIS Benchtop Workstation debug the protection board and change fuses Removing the Protection Board The protection board detaches from the NI ELVIS Benchtop Workstation as shown in Figure B 1 Refer to Where to Start with NI ELVIS for more parts locator diagrams of the NI ELVIS Benchtop Workstation 1 NIELVIS Protection Board 2 NIELVIS Benchtop Workstation Figure B 1 NI ELVIS Benchtop Workstation with Protection Board Removed National Instruments Corporation B 1 NI ELVIS User Manual Appendix B Protection Board Fuses Complete the following steps to remove the protect
33. signals signal description table 3 9 DSUB SHIELD signal signal description table 3 9 dynamic signal analyzer See DSA E electromagnetic compatibility specifications A 8 ELVIS See NI ELVIS Enable Communications Bypass VI See also communications switch purpose 3 1 examples NI resources E 1 F FGEN See function generator FM IN signal See also function generator connecting analog output signals 3 12 signal description table 3 8 FREQ OUT signal connecting counter timer signals 3 14 signal description table 3 9 FUNC OUT signal See also function generator connecting analog output signals 3 12 resistor pack B 4 signal description table 3 8 function generator calibration utility 2 7 connecting signals 3 13 hardware controls description 3 3 controls location figure 3 2 LabVIEW API 4 6 overview 2 6 resource conflicts table D 2 signal descriptions table 3 8 National Instruments Corporation 1 5 Index specifications A 5 theory of operation C 5 fuses debugging the protection board B 2 location figure B 4 types ratings manufacturer table B 3 G GLB_RESET signal See also digital I O signal description table 3 8 GROUND signal See also DC power supplies variable power supplies connecting analog output signals 3 13 signal description table 3 8 H hardware connecting signals 3 9 DAQ definition 1 1 overview 1 2 system requirements 3 1 fuses B 1 B 4
34. the NI ELVIS Digital Bus Reader SFP to acquire digital data ADDRESS lt 0 3 gt DIO Address Lines 0 through 3 Output of address bus CTRO SOURCE Counters Counter 0 Source Connected to the GPCTRO SOURCE pin on the DAQ device For more information about the GPCTRO SOURCE signal refer to the DAQ device documentation CTRO GATE Counters Counter 0 Gate Connected to the GPCTRO GATE pin on the DAQ device For more information about the GPCTRO GATE signal refer to the DAQ device documentation CTRO OUT Counters Counter 0 Output Connected to the GPCTRO OUT pin on the DAQ device For more information about the GPCTRO OUT signal refer to the DAQ device documentation CTRI GATE Counters Counter 1 Gate Connected to the GPCTR1_GATE pin on the DAQ device For more information about the GPCTR1I GATE signal refer to the DAQ device documentation CTRI OUT Counters Counter 1 Output Connected to the GPCTRI OUT pin on the DAQ device For more information about the GPCTRI OUT signal refer to the DAQ device documentation FREQ OUT Counters Frequency Output Connected to the FREQ OUT pin on the DAQ device For more information about the FREQ OUT signal refer to the DAQ device documentation LED lt 0 7 gt User Configurable I O LEDs 0 through 7 Input to the LEDs DSUB SHIELD User Configurable I O D SUB Shield Connection to D SUB shield DSUB
35. the NI ELVIS Help Function Generator Controls iyi Note You can control the function generator through either the hardware controls on the benchtop workstation Manual mode or the controls on the NI ELVIS FGEN SFP Software mode You can only use the controls described in the following section when the function generator is in Manual mode Manual Switch Controls whether the function generator is in Manual mode or Software mode Function Selector Selects what type of waveform is generated NI ELVIS can generate sine square or triangle waves Amplitude Knob Adjusts the peak amplitude of the generated waveform Coarse Frequency Knob Sets the range of frequencies the function generator can generate National Instruments Corporation 3 3 NI ELVIS User Manual Chapter 3 Hardware Overview Fine Frequency Knob Adjusts the output frequency of the function generator For more information about the software controls for the function generator refer to the NI ELVIS Help DMM Connectors N Caution By connecting different signals to both the DMM terminals on the prototyping board and the DMM connectors on the control panel you are shorting them together potentially damaging the circuit on the prototyping board CURRENT Banana Jacks e HI The positive input to all the DMM functionality except measuring voltage LO The negative input to all the DMM functionality except measur
36. to nga 3 6 Prototyping Board Signal Descriptions 3 7 Connecting SIBnalsz idi te et P e et piles 3 9 Grounding Considerations essere eene 3 10 Connecting Analog Input Signals eese 3 10 Generic Analog Input ic dice eh deae Pere 3 10 Resource Conflicts 4 et e ta te t ec 3 11 DMM 55 t tte ees A te t PE e ake 3 11 OSscill SCcope rere o y D salta as rca eua 3 12 Connecting Analog Output Signals esee 3 12 Generic Analog OUtpUt 3 rri tte esee etinm eren 3 12 DC Power Supplies 33 5 o eene epe er eed 3 12 Function Generator FGEN sse 3 12 Variable Power Supplies esee 3 13 Connecting Digital I O Signals sese 3 13 Connecting Counter Timer Signals eese 3 13 Connecting User Configurable Signals eee 3 14 Chapter 4 Programming NI ELVIS Programming NI ELVIS Using NI DAQmx eene eene 4 1 Analog Putinen ere ete reti e e aces ago RS fa aah dana ap da aaa 4 2 Analog OUtpU t x unanime eS 4 2 Timinerand Control WO oi tet rte er ette ds 4 3 Programming NI ELVIS Using the NI ELVIS LabVIEW API een 4 4 Variable Power Supplies ceret repperi ret dett ees 4 5 Function Generator eene uti Nen det tees 4 6 Digital Multimet t irte t EP hs 4 7 Disia VO iei tete etel edu REM 4 7 O
37. 2 7 resource conflicts D 1 signal descriptions table 3 8 National Instruments Corporation 1 9 Index specifications negative supply A 7 positive supply A 6 virtual instrumentation 1 3 VOLTAGE HI signal See also DMM connecting analog input signals 3 12 DMM theory of operations C 1 signal description table 3 8 VOLTAGE LO signal See also DMM connecting analog input signals 3 12 DMM theory of operations C 1 signal description table 3 8 W Web resources E 1 WR_ENABLE signal See also digital I O signal description table 3 8 NI ELVIS User Manual
38. 4 counter signal correlations table 4 3 signal description table 3 9 CTR1_GATE signal connecting counter timer signals 3 14 counter signal correlations table 4 3 signal description table 3 9 CTR1_OUT signal connecting counter timer signals 3 14 counter signal correlations table 4 3 signal description table 3 9 CTR1_SOURCE signal connecting counter timer signals 3 14 counter signal correlations table 4 3 signal description table 3 9 CURRENT HI signal See also DMM connecting analog input signals 3 12 fuses figure B 4 signal description table 3 7 theory of operation DMM C 3 impedance analyzer C 8 three wire current voltage analyzer C 13 two wire current voltage analyzer C 12 CURRENT LO signal See also DMM connecting analog input signals 3 12 fuses figure B 4 impedance analyzer theory of operation figure C 9 signal description table 3 7 NI ELVIS User Manual Index theory of operation DMM C 3 three wire current voltage analyzer C 13 two wire current voltage analyzer C 12 D DAC lt 0 1 gt signals See also analog output connecting analog output signals 3 12 fuses figure B 4 internally using caution 3 12 signal description table 3 8 theory of operation three wire current voltage analyzer C 13 two wire current voltage analyzer C 12 DAQ hardware definition 1 1 NI ELVIS components figure 2 2 overview 1 2 resource conflicts table D 2 system requireme
39. FFERS FROM NATIONAL INSTRUMENTS TESTING PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL INSTRUMENTS THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION INCLUDING WITHOUT LIMITATION THE APPROPRIATE DESIGN PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION Compliance Compliance with FCC Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission FCC has rules to protect wireless communications from interference The FCC places digital electronics into two classes These classes are known as Class A for use in industrial commercial locations only or Class B for use in residential or commercial locations All National Instruments NI products are FCC Class A products Depending on where it is operated this Class A product could be subject to restrictions in the FCC rules In Canada the Department of Communications DOC of Industry Canada regulates wireless interference in much the same way Digital electronics emit weak signals during normal operation that can affect radio television or other wireless products All Class A products display a simple warning statement of one paragra
40. IS Prototyping Board is powered off the CURRENT LO pin from the prototyping board is disconnected The NI ELVIS Benchtop Workstation control panel connection is always connected Protection Board The signal from the DUT passes through a fuse on the protection board This fuse adds resistance to the measurement NI ELVIS Motherboard When the prototyping board is powered off the CURRENT LO pin from the prototyping board is disconnected You can switch the input path between impedance and current measurements by modifying the LabVIEW VIs that are included in the National Instruments Corporation C 9 NI ELVIS User Manual Appendix C Theory of Operation NI ELVIS source code You cannot measure impedance and current at the same time The input voltage across the DUT has a programmable gain applied NI ELVIS has four programmable gain ranges that you can select with the NI ELVIS Impedance Analyzer SFP The input to the op amp is protected from overvoltage and overcurrent conditions This protection should prevent damage to the op amp or the gain stage The output of the op amp is multiplexed to differential channel seven DAQ Device The DAQ device reads the output sine wave on differential channel seven The AI 7 reading is used as the signal reference B for the impedance measurements Internal Calculations NI ELVIS User Manual The following values are stored in the NI ELVIS EEPROM e Gain system gain error correc
41. NI Educational Laboratory Virtual Instrumentation Suite NI ELVIS User Manual August 2004 lt 7 NATIONAL 3733638 ot INSTRUMENTS Worldwide Technical Support and Product Information ni com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin Texas 78759 3504 USA Tel 512 683 0100 Worldwide Offices Australia 1800 300 800 Austria 43 0 662 45 79 90 0 Belgium 32 0 2 757 00 20 Brazil 55 11 3262 3599 Canada Calgary 403 274 9391 Canada Ottawa 613 233 5949 Canada Qu bec 450 510 3055 Canada Toronto 905 785 0085 Canada Vancouver 604 685 7530 China 86 21 6555 7838 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 385 0 9 725 725 11 France 33 0 1 48 14 24 24 Germany 49 0 89 741 31 30 India 91 80 51190000 Israel 972 0 3 6393737 Italy 39 02 413091 Japan 81 3 5472 2970 Korea 82 02 3451 3400 Malaysia 603 9131 0918 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 095 783 68 51 Singapore 65 6226 5886 Slovenia 386 3 425 4200 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 200 51 51 Taiwan 886 2 2528 7227 Thailand 662 992 7519 United Kingdom 44 0 1635 523545 For further support information refer to the Technical Support and Professional Services appendix To comment on National Instruments documentation refer to the
42. Q device The plot of the gain and phase of a system as a function of frequency The group of conductors that interconnect individual circuitry in a computer Typically a bus is the expansion vehicle to which I O or other devices are connected An example of a PC bus is the PCI bus G 2 ni com C C capacitance CH channel counter timer CTRO GATE CTRO OUT CTRO SOURCE CTR1 GATE CTRI OUT CURRENT D D A DAC DAQ dB DC default setting O National Instruments Corporation G 3 Glossary Celsius The ability to hold an electrical charge Channel Pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to form ports Ports usually consist of either four or eight digital channels A circuit that counts external pulses or clock pulses timing Counter O gate signal Counter O output signal Counter O source signal Counter 1 gate signal Counter 1 output signal Input signals for current related measurements for the DMM Digital to analog D A converter Data acquisition Decibel the unit for expressing a logarithmic measure of the ratio of two signal levels dB 20log10 V1 V2 for signals in volts Direct current A default parameter value recorded in the driver In many cases the default input of a control is a certain value often 0 that means use the current default
43. VIS hardware the DAQ device and the LabVIEW software that controls the hardware Various measurements can be performed by NI ELVIS using either the NI DAQmx driver or the NI ELVIS instrument driver Three standard measurement functions of DAQ devices AI AO and TIO can be utilized when connected to the NI ELVIS Benchtop Workstation The fourth DAQ device function DIO is unavailable with an NI ELVIS measurement system since the DAQ device DIO communicates with the control circuitry of the benchtop workstation Additionally the NI ELVIS Benchtop Workstation has variable power supplies a function generator a DMM and DIO circuitry that you can control using the NI ELVIS instrument driver which is located in the functions palette under Instrument I O Instrument Drivers NI ELVIS This chapter explains how to program the NI ELVIS hardware using NI DAQmx and the NI ELVIS Instrument Driver This chapter is not intended to be an exhaustive guide to programming with LabVIEW or NI DAQmx its purpose is instead to familiarize you with concepts you should know about when programming NI ELVIS For more information on programming with NI DAQmx or LabVIEW refer to the NI DAQmx documentation that shipped with the device or to the LabVIEW Measurements Manual Programming NI ELVIS Using NI DAQmx This section explains how to program NI ELVIS for AI AO and timing and control I O applications You can find other examples for using NI ELVIS for AI
44. Y terminal and 12 to 0 V on the SUPPLY terminal The GROUND pin provides a connection to the same ground of the DC power supplies Connecting Digital 1 0 Signals This section describes how to connect the DIO signals on the prototyping board NI ELVIS provides a digital input DI and digital output DO bus The input and output bus are 8 bit buses that are controlled by NI ELVIS while in software mode When the Communications switch is set to Bypass mode DI lt 0 7 gt become directly connected to the DAQ device digital lines DO lt 0 7 gt are the digital output signals of NI ELVIS to the prototyping board The output bus logic is 5 V TTL for high level and 0 V TTL for low level DI lt 0 7 gt are the digital input signals to NI ELVIS from the prototyping board The minimum voltage for logic high level is 2 0 V The maximum voltage for a low level is 0 8 V When in manual mode logic levels high and low are dependent on the DAQ device The address bus is an 8 bit bus used for communication on the prototyping board The lower four bits of the address bus WR ENABLE LATCH GLB RESET and RD ENABLE are reserved for NI ELVIS communication Refer to the Prototyping Board Signal Descriptions section in this chapter for more information about these signals The upper four bits of the address bus ADDRESS lt 0 3 gt are open Some common uses for the address lines are digital controls lines for relays multiplexers or simple lo
45. adjustment knobs along with a modifiable timebase You also can choose trigger source and mode settings The autoscale feature allows you to adjust the voltage display scale based on the peak to peak voltage of the AC signal for the best display of the signal Depending on the DAQ device cabled to the NI ELVIS hardware you can choose between digital or analog hardware triggering You can connect to the NI ELVIS Scope SFP from the NI ELVIS Prototyping Board or from the BNC connectors on the front panel of the benchtop workstation The FGEN or DMM signals can be internally routed to this instrument In addition this computer based scope display has the ability to use cursors for accurate screen measurements The sampling rate of the Oscilloscope is determined by the maximum sampling speed of the DAQ device installed in the computer attached to the NI ELVIS hardware Refer to the DAQ device documentation for information about the type of triggering supported on the device and for the specifications for the maximum sampling speed of the device 2 6 ni com Chapter 2 NI ELVIS Overview Two Wire and Three Wire Current Voltage Analyzers These instruments allow you to conduct diode and transistor parametric testing and view current voltage curves The two wire instrument offers full flexibility in setting parameters such as voltage and current ranges and can save data to a file In addition the three wire instrument offers base current settings
46. alfunctions or service failures caused by owner s failure to follow the National Instruments installation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation Trademarks DAQPad LabVIEW National Instruments National Instruments Alliance Partner NI ni com NI DAQ and NI ELVIS are trademarks of National Instruments Corporation Product and company names mentioned herein are trademarks or trade names of their respective companies Members of the National Instruments Alliance Partner Program are business entities independent from National Instruments and have no agency partnership or joint venture relationship with National Instruments Patents For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 1 NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH
47. ation on the output impedance configuration options 5 Hz 35 kHz NI ELVIS User Manual Appendix A Specifications Oscilloscope Refer to the Analog Input section of the DAQ device specifications documentation ACCULACY 3 5 e RO ma e P Er 12 bits or 16 bits DAQ device dependent Input impedance esee DAQ device dependent Maximum horizontal resolution DAQ device dependent Range sees nage 10 V Sampling rate per channel 100 kHz 500 kHz DAQ device dependent Maximum input bandwidth 10 kHz 50 kHz DAQ device dependent Vertical resolution sssss 12 bits or 16 bits DAQ device dependent Two Wire Current Voltage Analyzer Current range ss needed 10 mA Voltage sweep range eese 10 V Three Wire Current Voltage Analyzer Minimum base current increment 15 uA Maximum collector current 10 mA Maximum collector voltage 10 V Variable Power Supplies Positive Supply Output voltage 12V Ripple and noise esses 0 25 This SFP instrument is intended for use only with NPN BJT transistors NI ELVIS User Manual A 6 ni com Appendix A Specifications Software controlled resolution 7 bits Current limiting eee 0 5 V at 160 mA 5 V at 275 mA 12 V at 450 mA Negative Supply Output voltage eee esee 12V Ripple and noise
48. ch advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on the product refer to the Safety Information section of Chapter 1 DAQ System Overview for precautions to take bold Bold text denotes items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names and hardware labels DAQ device DAQ device refers to any National Instrument DAQ device that meets the conditions listed in the DAQ Hardware section of Chapter 3 Hardware Overview ELVIS Educational Laboratory Virtual Instrumentation Suite National Instruments Corporation ix NI ELVIS User Manual About This Manual italic monospace PCI Italic text denotes variables emphasis a cross reference or an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply Text in this font denotes text or characters that you should enter from the keyboard sections of code programming examples and syntax examples This font is also used for the proper names of disk drives paths directories programs subprograms subroutines device names functions operations variables filenames and extensions Peripheral Component Interconnect a high performance expansion bus architecture originally developed by Intel to replace ISA and EISA Related Documentation NI ELVIS User Manual The fol
49. configure the selected components to a defined state A reference refnum to the specific component is generated and then used by subsequent VIs to perform the desired actions The instrument driver handles the resource sharing that occurs between the components of the NI ELVIS For example the DMM uses the function generator for its measurements Without resource management if an application using the function generator is running when a DMM application runs one or both applications might return incorrect results To prevent this problem if the driver detects that a resource is in use an error is returned Resource management is valid within one LabVIEW process only Therefore if an application executable built using the NI ELVIS instrument driver is running at the same time as another application using 4 4 ni com Chapter 4 Programming NI ELVIS the driver LabVIEW development environment resource management is not in effect across the processes and incorrect behavior can occur The NI ELVIS Help includes function reference topics for each instrument API that lists and describes parameters for each instrument VI SL Note To ensure correct behavior with programs that use NI ELVIS with the instrument driver first you must close the SFP instruments You can find other examples for using NI ELVIS for AI AO and counter timer applications by launching LabVIEW and selecting Find Examples Hardware Input and Output DA Q and then
50. connected to the DAQ device input channels NI ELVIS also has two ground pins AISENSE and AIGND which are connected to the DAQ device Table 3 2 shows how the NI ELVIS input channels map to the DAQ device input channels Table 3 2 Analog Input Signal Mapping NI ELVIS Input Channel DAQ Device Input Channel ACHO AIO ACHO0 AI8 ACHI All ACHI AI9 ACH2 AI2 ACH2 AI 10 ACH3 AI 3 ACH3 AI 11 NI ELVIS User Manual 3 10 ni com Chapter 3 Hardware Overview Table 3 2 Analog Input Signal Mapping Continued NI ELVIS Input Channel DAQ Device Input Channel ACH4 AI4 ACH4 AI 12 ACH5 AI5 ACH5 AI 13 AISENSE AISENSE AIGND AIGND The following sections describe some special considerations for connecting the AI signals on the prototyping board including sections that specifically pertain to the Oscilloscope and DMM Resource Conflicts Some of the AI channels are used by the internal circuitry for other instruments but the majority of the time the channel can still be used ACH lt 0 2 gt can be used without interruption ACHS is interrupted if any of the impedance analyzing capabilities of the DMM such as the capacitance meter diode tester and so on are used If you are using the Oscilloscope disconnect any signals from ACH3 and ACHA to avoid double driving the channels For more information about possible resource conflicts refer to Appendix D R
51. create E 1 5 V us 1 The Arbitrary Waveform Generator does not work with the NI 6014 or NI 6024 National Instruments Corporation A 1 NI ELVIS User Manual Appendix A Specifications Bode Analyzer Amplitude accuracy eese 12 or 16 bits DAQ device dependent Phasedctutaty ennnen ieee 1 degree Frequency range 5 Hz 35 kHz DC Power Supplies 15 V Supply Output current Fused at 500 mA Output voltage 15 V at 5 max Line regulation esee 0 5 max Ripple and noise esses 196 15 V Supply Output current sese Fused at 500 mA Output voltage ooonconicnnncnocnnononnnconannncnnon 15 V at 5 max Line regulation eee 0 5 max Ripple and noise sess 196 5 V Supply Output current eese Fused at 2 A Output voltage esee 5 V at 5 max Line regulation see 0 5096 max Ripple and noise 1 1 Total current drawn from 15 V supply and variable power supplies cannot exceed 500 mA NI ELVIS User Manual A 2 ni com Appendix A Specifications Digital 1 0 Digital input resolution 8 bits Digital output resolution 8 bits Digital addressing ss 4 bits DMM Capacitance Measurement INCCUFACY ss isi ett p s 196 Range sete RARE 50 pF 500 uF in three ranges Test freque
52. cument is accurate The document has been carefully reviewed for technical accuracy In the event that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control The warranty provided herein does not cover damages defects m
53. d or from the connectors on the NI ELVIS Benchtop Workstation control panel When the prototyping board is powered off the CURRENT HI and CURRENT LO terminals from the prototyping board are disconnected and any current from the prototyping board stops flowing Protection Board The protection board has fuses for each channel These fuses handle overcurrent conditions NI ELVIS Motherboard A 0 5 current shunt resistor is used at the input of a difference amplifier to convert the current to a voltage The current meter is not adjusted for common mode rejection The common mode rejection of the current meter is determined by the difference amplifier C 4 ni com Appendix C Theory of Operation The output voltage is multiplexed to differential channel seven DAQ Device The DAQ device takes the reading on differential channel seven and converts the voltage reading into the current that is displayed in the NI ELVIS software Internal Calculations The following values are stored in the NI ELVIS EEPROM e Gain shunt resistor value gain error correction for NI ELVIS and the DAQ device are included e Offset system offset error correction includes NI ELVIS and DAQ device offset The voltage returned can represent AC or DC current The offset variable should remove most offset caused by NI ELVIS and or the DAQ device VDC DC measurement of the voltage on differential channel seven VAC AC measurement of the voltage o
54. e reading includes the offset variable stored in the EEPROM to help eliminate offset errors Resistance Meter The resistance meter is a subset of the NI ELVIS Impedance Analyzer and it uses the same circuitry To get more accurate readings the function generator output frequency is set to 120 Hz and the amplitude is locked at 1 Vp p These settings allow a focused calibration that reduces resistive and capacitive offset The resistance meter uses four ranges to measure from 5 Qto 3 MQ Inductance Meter The inductance meter is a subset of the NI ELVIS Impedance Analyzer and it uses the same circuitry To get more accurate readings the function generator output frequency is set to 950 Hz and the amplitude is locked at 1 Vp p These settings allow a focused calibration that reduces resistive and capacitive offset Capacitance Meter The capacitance meter is a subset of the NI ELVIS Impedance Analyzer and it uses the same circuitry You can select electrolytic and normal capacitors To get more accurate readings on electrolytic capacitors the function generator output frequency is set to 120 Hz and the amplitude is locked 2 V with a DC offset of 2 5 V For normal capacitors the function generator output frequency is set to 950 Hz and the amplitude is locked at 1 Vp p These settings allow a focused calibration that reduces resistive and capacitive offset National Instruments Corporation C 11 NI ELVIS User Manual App
55. eform Editor Because a typical DAQ device has two AO channels two waveforms may be simultaneously generated You can choose continuous output or a one shot output The maximum output rate of the NI ELVIS ARB SFP is determined by the maximum update rate of the DAQ device connected to the NI ELVIS hardware Refer to the DAQ device documentation for these specifications 2 4 ni com Chapter 2 NI ELVIS Overview Bode Analyzer By combining the frequency sweep feature of the function generator and the AI capability of the DAQ device a full function Bode Analyzer is available with NI ELVIS You can set the frequency range of the instrument and choose between linear and dB display scales Digital Bus Reader This instrument reads digital data from the NI ELVIS digital input DI bus You can either continuously read from the bus or you can take a single reading Digital Bus Writer This instrument updates the NI ELVIS digital output DO bus with user specified digital patterns You can manually create a pattern or select predefined patterns such as ramp toggle or walking ones This instrument can either continually output a pattern or just perform a single write The output of the NI ELVIS Digital Bus Writer SFP stays latched until the instrument is stopped or another pattern is output Output voltage levels of the SFP are TTL compatible Digital Multimeter DMM This commonly used instrument can perform the following types of
56. endix C Theory of Operation Two Wire Current Voltage Analyzer The two wire measurement is made by using the DAQ device AO 0 signal to generate a user controlled voltage sweep The voltage is read before the DUT on AI 5 and then across the DUT on AI 7 The NI ELVIS Impedance Analyzer circuitry provides the feedback resistor that transforms the current flowing into the CURRENT LO pin into a voltage The CURRENT HI pin is the output voltage source on the prototyping board and benchtop workstation control panel Two Wire Current Voltage Analyzer Signal Path gt A B C NI ELVIS Motherboard Prototyping Board DAQ Device DACO gt CURRENT HI T AI 5 AM DUT CURRENT LO o AI 7 Figure C 7 Two Wire Measurement Block Diagram Internal Calculations NI ELVIS User Manual The following values are stored in the NI ELVIS EEPROM CA SLOPE actual value of each feedback resistor four values The voltage output on CURRENT HI pin is from the DAQ device DACO The CURRENT HI pin is read on AI 5 and stored as the VOLTAGE V that is displayed The input current is measured on the CURRENT LO pin of the prototyping board The CURRENT LO pin is read on AI 7 The DAQ device can only read voltage so the current is converted to voltage The NI ELVIS Impedance Analyzer circuitry converts the current to voltage The voltage read is then converted back to current using Ohm s
57. ent Launcher provides access to the NI ELVIS software instruments To launch an instrument click the button corresponding to the desired instrument If the NI ELVIS software is properly configured and the benchtop workstation is cabled to the appropriate DAQ device all buttons should be visible If there is a problem with your configuration such as when the NI ELVIS Benchtop Workstation is powered off or disconnected from the configured DAQ device all instrument buttons are dimmed and the only available option is to click the Configure button Refer to Where to Start with NI ELVIS for more information about configuring NI ELVIS Some instruments perform similar operations using the same resources of the NI ELVIS hardware and the DAQ device and cannot be run at the same time If you launch two instruments with overlapping functionality that cannot run at the same time the NI ELVIS software generates an error dialog describing the conflict The instrument with the error is disabled and will not function until the conflict is resolved Arbitrary Waveform Generator ARB This advanced level SFP instrument uses the AO capabilities of NI ELVIS DACO and DACI You can create a variety of signal types using the Waveform Editor software which is included with the NI ELVIS software You can load waveforms created with the NI Waveform Editor into the ARB SFP to generate stored waveforms Refer to the NI ELVIS Help for more information about the Wav
58. ent measurement A 3 voltage measurement A 4 electromagnetic compatibility A 8 function generator A 5 oscilloscope A 6 safety A 8 variable power supplies negative supply A 7 positive supply A 6 SUPPLY signal See also variable power supplies connecting analog output signals 3 13 signal description table 3 8 SUPPLY signal See also variable power supplies signal description table 3 8 support technical E 1 SYNC OUT signal See also function generator connecting analog output signals 3 12 resistor pack B 4 signal description table 3 8 system power LED figure 3 2 system requirements 3 1 T technical support E 1 three wire current voltage analyzer resource conflicts table D 2 SFP overview 2 7 theory of operation C 13 training and certification NI resources E 1 TRIGGER signal See also oscilloscope connecting analog input signals 3 12 signal description table 3 7 ni com troubleshooting NI resources E 1 two wire current voltage analyzer U resource conflicts table D 2 SFP overview 2 7 theory of operation C 12 user configurable I O V BANANA signals 3 8 BNC lt 1 2 gt signals 3 8 BNC lt 1 2 gt signals 3 8 connecting signals 3 14 DSUB pin lt 0 9 gt signals 3 9 DSUB shield 3 9 LED lt 0 7 gt signals 3 9 variable power supplies calibration utility 2 7 fuses figure B 4 hardware controls description 3 3 figure 3 2 LabVIEW API 4 5 overview
59. ents Corporation Transducer A device that converts a physical phenomenon such as light temperature pressure or sound into a measurable electrical signal such as voltage or current Signal The product of the DAQ system transducer Signal conditioning Hardware that you can connect to the DAQ device to make the signal suitable for measurement or to improve accuracy or reduce noise The most common types of signal conditioning include amplification excitation linearization isolation and filtering DAQ hardware Hardware you use to acquire measure and analyze data Software NI application software is designed to help you easily design and program your measurement and control application 1 1 NI ELVIS User Manual Chapter 1 DAQ System Overview Figure 1 1 shows the components of a typical DAQ system Data Acquisition and Analysis Hardware Software Personal Computer Figure 1 1 Typical DAQ System NI ELVIS incorporates DAQ hardware and software the last two of the DAQ system components into one product The following sections give more information about DAQ hardware and software which is LabVIEW in the case of NI ELVIS DAQ Hardware Since DAQ devices acquire electrical signals a transducer or a sensor must convert some physical phenomenon into an electrical signal A DAQ system can also simultaneously produce electrical signals These signals can either intelligently control mechanical s
60. ents besides voltage The NI ELVIS is ground referenced National Instruments Corporation 3 7 NI ELVIS User Manual Chapter 3 Hardware Overview Table 3 1 Signal Descriptions Continued Signal Name Type Description VOLTAGE HI DMM Positive Voltage Positive input for the DMM voltmeter VOLTAGE LO DMM Negative Voltage Negative input for the DMM voltmeter DAC lt 0 1 gt NI ELVIS AO Analog Output for Channels 0 and 1 Outputs of the DAQ device buffer For more information about the DAQ device analog output signals refer to the DAQ device documentation and Appendix C Theory of Operation FUNC OUT Function Generator Function Output Output of the function generator SYNC OUT Function Generator Synchronization Output T TL signal of the same frequency as the output as the FUNC OUT pin AM IN Function Generator Amplitude Modulation Input Input to the amplitude modulator for the function generator FM IN Function Generator Frequency Modulation Input Input to the frequency modulator for the function generator BANANA A D User Configurable I O Banana Jacks A through D Connects to the banana jacks pins BNC lt 1 2 gt User Configurable I O BNC Connectors 1 and 2 Connects to the BNC pins BNC lt 1 2 gt User Configurable I O BNC Connectors 1 and 2 Connects to the BNC pins SUPPLY Variable Power Supplies Positive Output
61. ersity laboratories With LabVIEW you can rapidly create applications using intuitive graphical development and add user interfaces for interactive control Scientists and engineers can use the straightforward I O functionality of LabVIEW along with its analysis capabilities LabVIEW can also be used in the classrooms to solve purely analytical or numerical problems For more information on programming with LabVIEW refer to Getting Started with LabVIEW and the LabVIEW Measurements Manual available at ni com manuals The LabVIEW Help is available by selecting Help VI Function and How To Help from the LabVIEW block diagram or front panel or you can select Help Search the LabVIEW Bookshelf from the block diagram or front panel to display other relevant LabVIEW documentation Virtual Instrumentation Virtual instrumentation is defined as the combination of measurement and control hardware and application software with industry standard computer technology to create user defined instrumentation systems Virtual instrumentation provides an ideal platform for developing instructional curriculum and conducting scientific research In an instructional laboratory course students perform various experiments that combine measurements automation and control Tools or systems used in these situations must be flexible and adaptable In research environments virtual instrumentation provides the flexibility that a researcher must have to modify the
62. esource Conflicts N Caution By connecting different signals to both the DMM terminals on the prototyping board and the DMM connectors on the control panel you are shorting them together potentially damaging the circuit on the prototyping board DMM Both the CURRENT and VOLTAGE inputs are available on the prototyping board along with an additional terminal for three wire transistor measurements The differential voltmeter inputs are labeled VOLTAGE HI and VOLTAGE LO The rest of the functionality of the DMM is available through the CURRENT HI and CURRENT LO pins National Instruments Corporation 3 11 NI ELVIS User Manual Chapter 3 Hardware Overview The 3 WIRE pin is used for three terminal device measurements in conjunction with the CURRENT HI and CURRENT LO pins N Caution By connecting different signals to the Scope terminals on the prototyping board and the Scope connectors on the control panel you are shorting them together potentially damaging the circuit on the prototyping board Oscilloscope The inputs of the Oscilloscope are available on the prototyping board as CH lt A B gt CH lt A B gt and TRIGGER CH lt A B gt are directly connected to ACH3 and ACHA respectively on the DAQ device Refer to the Generic Analog Input section for more information about resource conflicts and grounding Connecting Analog Output Signals This section describes how to connect the AO signals on the prototyping board
63. externally protected on the NI ELVIS Protection Board The two inputs are combined on the protection board and passed to the NI ELVIS motherboard NI ELVIS Motherboard The VOLTAGE HI and VOLTAGE LO input terminals are divided with 500 kQ input resistors A manual adjustment is made at the factory for common mode rejection The adjusted common mode rejection is typically above 80 dB The operational amplifier used by NI ELVIS is a fully differential JFET input with a gain of 0 5 The input slew rate is typically 11 V us This high slew rate helps minimize AC signal distortion C 2 ni com Appendix C Theory of Operation The internal NI ELVIS bus sets the differential channel seven multiplexer to read the voltmeter voltage You cannot run the voltmeter with any other DMM functions DAQ Device The DAQ device takes the voltage reading on differential channel seven and converts the raw voltage into the voltage reading that is displayed in the NI ELVIS software Internal Calculations The following values are stored in the NI ELVIS EEPROM e Gain gain error correction for NI ELVIS and the DAQ device e Offset offset error correction for NI ELVIS and the DAQ device These values are used when calculating voltage readings from the NI ELVIS To calculate the voltage read on differential channel seven use the following formula Voltage read VOLTAGE HI VOLTAGE LO 2 The NI ELVIS software then performs the following calculations
64. g fg fg fg fg fg fg fgjao fg fg fg fg fg fgifg jao fg fg fg fg fg ao ao ao ao ao ao lais aid aid aid aid aid aid aid aid aid aid aid ais aid aid aid aid aid aid aid aid aid aid aid ao aid aid ca ca calais ca ca ca aid ca ca fg fg fg aid aid ca ca ca ais ca ca ca aid ca ca fg fg fg aid aid ca ca ca ais ca ca ca aid ca ca fg fg fg aid aid ca ca ca ais ca Ca ca aid ca ca laid aid ais ais ais ais ca Ca ca aid ca ca l aid aid ca ca ca ca ca ca ca aid ca ca ao aid aid ca ca ca ca ca ca ca Jaid ca ca fg fg fg aid aid ca ca ca ca ca ca ca aid ca ca fg fg fg laid aid aid aid aid aid aid aid aid aid aid aid ao aid aid ca ca ca ca ca ca ca ca aid ca ao aid aid ca ca ca ca ca ca ca ca aid ca Conflict Codes aid DAQ Al different channels ais DAQ Al same channels ao DAQ AO ctr DAQ counter timers fg NI ELVIS function generator ca
65. ignal sources Some common example of floating signal sources are batteries transformers or thermocouples Frequency modulation input signal Frequency output signal The basic unit of rate measured in events or oscillations per second using a frequency counter or spectrum analyzer Frequency is the reciprocal of the period of a signal The user interface of a LabVIEW virtual instrument Output signal for the function generator The factor by which a signal is amplified sometimes expressed in decibels General purpose counter timer O gate signal available from a DAQ device General purpose counter timer O output signal available from a DAQ device General purpose counter timer O clock source signal available from a DAQ device General purpose counter timer 1 gate signal available from a DAQ device General purpose counter timer 1 output signal available from a DAQ device General purpose counter timer 1 clock source signal available from a DAQ device Prototyping board ground signal NI ELVIS User Manual Glossary H hardware triggering I O in impedance inductance JFET L LabVIEW LATCH LED NI ELVIS User Manual A form of triggering where you set the start time of an acquisition and gather data at a known position in time relative to a trigger signal Hertz the number of scans read or updates written per second Input output the transfer of data to from a computer system inv
66. in strain measurements NI ELVIS in Biological Sciences N Caution The NI ELVIS hardware is not environmentally sealed therefore exercise extreme caution for use in chemical and biological sciences NI ELVIS User Manual Biomedical engineering departments have challenges that are similar to those of mechanical departments Students typically learn basic electronics and build instruments such as an electrocardiogram ECG monitor The prototyping board offers signal conditioning capability for ECG sensors and the NI ELVIS SFP instruments are ideal for testing the circuits as students build the signal conditioning circuits 2 8 ni com Chapter 2 NI ELVIS Overview NI ELVIS in Physical Sciences Physics students typically learn electronics and circuit design theory NI ELVIS provides these students with the opportunity to implement these concepts Physics students sometimes need signal conditioning for common sensors such as photoelectric multiplier or light detector sensors Students can build high gain low noise circuits on a printed circuit board PCB and use them in modern physics labs National Instruments Corporation 2 9 NI ELVIS User Manual Hardware Overview This chapter describes the hardware components of NI ELVIS including the DAQ device the benchtop workstation and the prototyping board Appendix C Theory of Operation provides more information about the circuitry used for the different NI ELVIS measurements
67. ing voltage VOLTAGE Banana Jacks HI The positive input for voltage measurements LO The negative input for voltage measurements 3 Note The NI ELVIS DMM is ground referenced Oscilloscope Scope Connectors N Caution By connecting different signals to the Scope terminals on the prototyping board and the Scope connectors on the control panel you are shorting them together potentially damaging the circuit on the prototyping board CHA BNC Connector The input for channel A of the Oscilloscope CHB BNC Connector The input for channel B of the Oscilloscope Trigger BNC Connector The input to the trigger of the Oscilloscope NI ELVIS User Manual 3 4 ni com Chapter 3 Hardware Overview NI ELVIS Protection Board NI ELVIS protects the DAQ device installed in the desktop computer by means of a protection board located inside the NI ELVIS Benchtop Workstation This removable protection board provides short circuit protection from unsafe external signals Removing the protection board enables you to quickly replace a nonfunctioning board with a replacement unit The components on the protection board can be obtained from electronics vendors and thus can be serviced without sending the board to NI for repairs Refer to Appendix B Protection Board Fuses for more information about changing the fuses on the NI ELVIS Protection Board NI ELVIS Prototyping Board This section describes the NI ELVIS P
68. ion board from the benchtop workstation Refer to Figure B 1 as needed 1 Move the NI ELVIS Power Switch to Standby The Standby switch is located on the back side of the benchtop workstation Refer to Where to Start with the NI ELVIS for an illustration of the switch location 2 Unplug the 68 pin cable and the power supply cable from the benchtop workstation 3 Disconnect the prototyping board from the benchtop workstation 4 Unscrew the captive screws located on the back of the NI ELVIS Protection Board 5 Gently pull on the captive screws to remove the protection board Debugging the Protection Board NI ELVIS User Manual The protection board provides a level of electrical protection between the prototyping board and the motherboard of the NI ELVIS This protection consists of fuses for the high current signals such as the power supplies AO channels and DMM and 100 Q current limited resistors for the low current signals such as the AI channels and digital signals If too much current begins to flow to or from a particular signal on the prototyping board the fuse or resistor breaks down opening the connection electrically To debug the protection board you need a DMM with an ohmmeter Complete the following steps 1 Verify that the NI ELVIS is in Standby mode The Standby switch is located on the back of the NI ELVIS Benchtop Workstation 2 Remove the protection board assembly from the rest of the NI ELVIS w
69. is read on AI 6 internal to NI ELVIS This voltage is displayed as the Voltage Vc in the Three Wire Current Voltage Analyzer SFP National Instruments Corporation C 13 NI ELVIS User Manual Appendix C Theory of Operation The base current output on the CURRENT HI pin is from the DAQ device AO 0 The CURRENT HI pin is read on AI 5 as a voltage The DAQ device can only read voltage so the current is converted to voltage The voltage read is then converted back to current by using Ohm s Law For R use the NI ELVIS onboard 332 Q resistor and for V use the CH5 voltage Ib Amps CH5 voltage 332 Q The Base current Ib is not displayed on the soft front panel The input collector current is measured on the CURRENT LO pin of the prototyping board The CURRENT LO pin is read on AI 7 The DAQ device can only read voltage so the current is converted to voltage The NI ELVIS Impedance Analyzer circuitry is used to convert the current to voltage The voltage read is then converted back to current by using Ohm s Law For R use the NI ELVIS feedback resistor CA Slope and for V use the CH7 voltage Ic in Amps CH7 voltage CA Slope The collector current is displayed as Current Ic A To determine the Beta 8 of the DUT use the following equation B Ic Ib f is not displayed on the soft front panel Arbitrary Waveform Generator Analog Output NI ELVIS User Manual The NI ELVIS buffers the output from the DAQ device
70. ith the DAQ device NI ELVIS also provides access to the programmable function input PFI pins on the DAQ device These pins are typically used in advanced applications that require external control of a measurement Examples of these advanced applications include triggering and scan clock control For more information on the PFI pins refer to the DAQ device documentation For more information on how to use the PFI pins using NI DAQmx refer to the NI DAQmx documentation that shipped with the DAQ device Programming NI ELVIS Using the NI ELVIS LabVIEW API NI ELVIS User Manual An instrument driver is a set of software routines that control a programmable instrument Each routine corresponds to a programmatic operation such as configuring reading from writing to and triggering the instrument Instrument drivers simplify instrument control by eliminating the need to learn the programming protocol for the instrument The NI ELVIS instrument driver is a collection of LabVIEW VIs that provides an API for controlling the NI ELVIS hardware The API allows the user to connect VIs in a logical manner to control the hardware functionality of the NI ELVIS Benchtop Workstation the variable power supplies function generator DMM and DIO circuitry The general programming flow when using the NI ELVIS instrument driver is Initialization Action Close The initialization VIs establish communication with the NI ELVIS Benchtop Workstation and
71. itialization and then the waveform parameters are continuously updated in the loop When the loop ends the function generator reference is closed and the output is set to zero The DAQ device number is provided to identify the DAQ device that is cabled to the NI ELVIS Benchtop Workstation The advanced features of the function generator the Tuning and AO Modulation controls can be configured using the NI ELVIS FGEN Configure VI By default both these features are disabled The refnum that is passed between the API VIs contains information about the current configuration state If the configuration VI is used in a loop you should wire the refnum to shift registers so that the refnum information persists between loops Refer to the NI ELVIS Help for more information about the specific VIs in the function generator API 4 6 ni com Chapter 4 Programming NI ELVIS Digital Multimeter The NI ELVIS Benchtop Workstation contains circuitry that combines with the DAQ hardware to allow DMM type measurements such as voltage current and resistance The DMM hardware can be controlled using the NI ELVIS instrument driver The driver allows the user to configure the measurement type and read the measurement results A simple application is shown in Figure 4 3 Configure Read Close Figure 4 3 Simple DMM Application The type of measurement is configured the measurement value is returned and then the DMM reference is closed
72. kstation has the following controls and indicators System Power LED Indicates whether the NI ELVIS is powered on Prototyping Board Power Switch Controls the power to the prototyping board NI ELVIS User Manual 3 2 ni com Chapter 3 Hardware Overview e Communications Switch Requests disabling software control of the NI ELVIS This setting provides direct access to the DAQ device DIO lines For more information about the Communications switch refer to the Using the DAQ Hardware in Bypass Mode section Variable Power Supplies Controls 3 Note You can control the variable power supplies through either the hardware controls on the benchtop workstation Manual mode or the controls on the NI ELVIS Variable Power Supplies SFP Software mode You can only use the controls described in the following section when the variable power supplies are in Manual mode Supply Controls Manual Switch Controls whether the negative supply is in Manual mode or Software mode Voltage Adjust Knob Controls the output of the negative supply The negative supply can output between 12 and 0 V Supply Controls Manual Switch Controls whether the positive supply is in Manual mode or Software mode Voltage Adjust Knob Controls the output of the positive supply The positive supply can output between 0 and 12 V For more information about the software controls for the NI ELVIS Variable Power Supplies SFP refer to
73. lowing documents contain information that you might find helpful as you read this manual DAQ device documentation available at ni com manuals e Getting Started with LabVIEW available at ni com manuals e LabVIEW Help available by selecting Help VI Function and How To Help from the LabVIEW block diagram or front panel e LabVIEW Measurements Manual available at ni com manuals e Measurement amp Automation Explorer Help for DAQmx available by selecting Help Help Topics NI DAQmx from the Measurement amp Automation Explorer MAX window e Where to Start with NI ELVIS available in PDF format on the NI ELVIS Software CD e NI ELVIS Help available on the NI ELVIS Software CD or from ni com manuals X ni com DAQ System Overview This chapter briefly describes the concept of DAQ systems and introduces NI ELVIS a DAQ system designed for educational laboratories What is DAQ DAQ systems capture measure and analyze physical phenomena from the real world Light temperature pressure and torque are examples of the different types of signals that a DAQ system can measure Data acquisition is the process of collecting and measuring electrical signals from transducers and test probes or fixtures and sending them to a computer for processing Data acquisition may also include the output of analog or digital control signals The building blocks of a DAQ system include the following items National Instrum
74. n differential channel seven Current AC Gain x N VAC VDC Current DC VDC Offset x Gain Current AC or Current DC is displayed in the NI ELVIS Software Function Generator NI ELVIS includes a hardware function generator The function generator can generate sine triangle and square waves You can modulate the output amplitude and frequency manually with software or using a combination of both National Instruments Corporation C 5 NI ELVIS User Manual Appendix C Theory of Operation Block Diagram Figure C 3 shows a basic block diagram of the NI ELVIS function generator The paragraphs that follow the figure describe each section of the figure in more detail Function Generator Signal Path C NI ELVIS Motherboard A B Prototyping Protection Board Board i Fuse O r NO Switch co FM A Amplitude XR2206 o 6 500 MUX AM i Control Panel Knob Wave Select FUNC OUT call oO o 6 LIU od NI ELVIS User Manual Figure C 3 Function Generator Block Diagram Prototyping Board and Benchtop Workstation Connectors The function generator output signal FUNC OUT is only on the prototyping board Protection Board On the protection board the function generator passes through a 100 Q current fused resistor
75. nal See also DC power supplies signal description table 3 8 15 V signal See also DC power supplies connecting analog output signals 3 12 signal description table 3 8 15 V power supply prototyping board power 3 6 specifications A 2 15 V signal connecting analog output signals 3 12 fuses figure B 4 Numerics 3 WIRE signal See also DMM connecting analog input signals 3 12 fuse figure B 4 signal description table 3 7 three wire current voltage analyzer theory of operation C 13 O National Instruments Corporation 1 1 A academic use of NI ELVIS 2 8 2 9 ACH lt o0 5 gt signals analog input signal mapping table 3 10 signal description table 3 7 ACH lt 0 5 gt signals analog input signal mapping table 3 10 signal description table 3 7 ADDRESS lt 0 3 gt signals See also digital I O resistor pack B 4 signal description table 3 9 AIGND signal analog input signal mapping table 3 10 connecting analog input signals 3 10 signal description table 3 7 AISENSE signal analog input signal mapping table 3 10 connecting analog input signals 3 10 resistor pack B 4 signal description table 3 7 AM IN signal See also function generator connecting analog output signals 3 12 resistor pack B 4 signal description table 3 8 analog input connecting signals 3 10 DAQ hardware in bypass mode 3 2 resistor packs B 4 resource conflicts 3 11 signal mapping table 3 10 software
76. ncy ee tete 120 or 950 Hz software selectable Max test frequency voltage 1 Vp p Sine wave software selectable Continuity Measurement Resistance threshold 15 Q max software selectable Test voltage ie ER 3 89 V software selectable Current Measurement Accuracy AC se ee d m E 0 25 3 mA DG ia heii ince Re 0 25 3 mA Common mode voltage 20 V max Common mode rejection 70 dB min Range eee petu 250 mA in two ranges max RESOLU tritio 12 bits or 16 bits DAQ device dependent 1 25 Hz to 10 kHz 2 Proper null correction at the common mode voltage can reduce the 3 mA offset error to 200 uA of noise O National Instruments Corporation A 3 NI ELVIS User Manual Appendix A Specifications Shunt resistance eee 0 5 Q Voltage burden esses 2 mV mA Diode Measurement Voltage threshold 1 1 V max Inductance Measurement ACCULACY hentai 196 Range ds 100 uH 100 mH Test frequency eee 950 Hz software selectable Test frequency voltage 1 V sine wave software selectable Resistance Measurement ACCULACY 3 erf nuts 1 Range seis isso rosie epe 5 2 3 MQ in four ranges Test frequency ener 120 Hz software selectable Test frequency voltage 1 Vp p
77. ng board 2 3 parts locator diagram 2 2 programming overview 4 1 software overview 2 3 theory of operation C 1 using in academic disciplines 2 8 2 9 NI DAQmx programming analog input 4 2 analog output 4 2 overview 4 1 timing and control 4 3 normal mode communications switch 3 1 ni com 0 oscilloscope connectors figure 3 2 connectors on benchtop workstation 3 4 overview 2 6 resource conflicts overview 3 11 table D 2 signal descriptions table 3 7 specifications A 6 P PFI lt 1 2 gt signals signal description table 3 7 PFI lt 5 7 gt signals signal description table 3 7 power supply DC See DC power supply prototyping board 3 6 variable See variable power supplies programmable function I O PFI lt 1 2 gt signals 3 7 PFI 5 7 signals 3 7 RESERVED signal 3 7 resistor pack B 4 SCANCLK signal 3 7 programming examples NI resources E 1 programming NI ELVIS overview 4 1 using LabVIEW DIO 4 7 DMM 4 7 function generator 4 6 overview 4 4 Scope 4 8 variable power supplies 4 5 using NI DAQmx analog input 4 2 analog output 4 2 O National Instruments Corporation 1 7 Index overview 4 1 timing and control I O 4 3 protection board debugging B 2 overview 3 5 reinstalling B 5 removing the protection board B 1 theory of operation C 1 prototyping board connecting signals analog input DMM 3 11 generic analog input 3 10 grounding 3 10 oscilloscope 3 12 res
78. ng measurement or test Installation categories establish standard impulse withstand voltage levels that commonly occur in electrical distribution systems The following is a description of installation categories Installation Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Installation Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as that provided by a standard wall outlet for example 115 V for U S or 230 V for Europe Examples of Installation Category II are measurements performed on household appliances portable tools and similar products Installation Category III is for measurements performed in the building installation at the distribution level This category refers to measurements on hard wired equipment such as equipment in fixed installations distribution boards and circuit breakers Other examples are wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and stationary motors with permanent connec
79. ngineering physical sciences and biological sciences laboratories NI ELVIS is suitable not only in terms of the included software but also because of the custom signal conditioning hardware you can create with NI ELVIS Instructors can implement the NI ELVIS curriculum with beginning to advanced classes to provide hands on experience to students NI ELVIS in Engineering NI ELVIS is suited for teaching basic electronics and circuit design to students in electrical engineering mechanical engineering and biomedical engineering The suite offers full testing measurement and data saving capabilities needed for such training Students can use the removable prototyping board at home to build circuits thus using laboratory time more effectively NI ELVIS SFP instruments such as the Bode Analyzer offer instructors an opportunity to teach advanced courses in signal analysis and processing Students may construct software filters in LabVIEW and hardware filters on the prototyping board and compare the performance of those two types of filters Mechanical engineering students can learn sensor and transducer measurements in addition to basic circuit design by building custom signal conditioning Students can install custom sensor adapters on the prototyping board For example installing a thermocouple jack on the prototyping board allows robust thermocouple connections The programmable power supply can provide excitation for strain gauges used
80. nts 3 1 theory of operation C 1 using the hardware in bypass mode 3 1 DC power supplies prototyping board power 3 6 signal descriptions table 3 8 specifications 5 V power supply A 2 x15 V supply A 2 debugging the protection board B 2 Declaration of Conformity NI resources E 1 DI lt 0 7 gt signals See also digital I O connecting digital I O signals 3 13 signal description table 3 9 diagnostic tools NI resources E 1 NI ELVIS User Manual 1 4 digital bus reader SFP 2 5 digital bus writer SFP 2 5 digital I O connecting signals 3 13 DAQ hardware requirements 3 1 DIO lines bypass mode 3 1 LabVIEW API 4 7 resistor packs B 4 resource conflicts D 1 signal descriptions table 3 8 3 9 software instruments digital bus reader 2 5 digital bus writer SFP 2 5 digital multimeter See DMM DMM connecting signals 3 11 connectors description 3 4 location figure 3 2 internally using the DACs caution 3 12 LabVIEW API 4 7 overview 2 5 resource conflicts table D 2 signal descriptions table 3 7 3 8 specifications current measurement A 3 voltage measurement A 4 theory of operation C 1 DO lt 0 7 gt signals See also digital I O connecting digital I O signals 3 13 signal description table 3 8 documentation conventions used in manual xi NI resources E 1 related documentation xii drivers NI resources E 1 DSA resource conflicts table D 2 SFP overview 2 6 ni com DSUB PIN
81. nually change the limits hy Note NI ELVIS does not support floating measurements Voltmeter When you use the voltmeter differential channel seven of the DAQ device AI 7 and AI 15 is used to read the voltage signal from NI ELVIS NI ELVIS applies a gain of 0 5 to the voltages that are applied to VOLTAGE HI and VOLTAGE LO National Instruments Corporation C 1 NI ELVIS User Manual Appendix C Theory of Operation Block Diagram Figure C 1 shows a basic block diagram of the NI ELVIS voltmeter The paragraphs that follow the figure describe each section of the figure in more detail VOLTAGE LO O Voltmeter Signal Path A B C D Prototyping Protection Board NI ELVIS Motherboard DAQ Device Board i i i 0 Q Socketed t E Resistors VOLTAGE HI o 1 1 A Al 7 MUX Benchtop Workstation Control Panel VOLTAGE HI i 1 VOLTAGE LO o 1 1 Rejection l Adjustment WA ye NI ELVIS User Manual Figure C 1 NI ELVIS Voltmeter Block Diagram Prototyping Board and Benchtop Workstation Connectors The input to the NI ELVIS voltmeter circuit can come from the NI ELVIS Prototyping Board or from the connectors on the NI ELVIS Benchtop Workstation control panel When the prototyping board is powered off both connections remain active Protection Board The inputs to the voltmeter are not
82. oduct only at or below Pollution Degree 1 Pollution is foreign matter in a solid liquid or gaseous state that can reduce dielectric strength or surface resistivity The following is a description of pollution degrees e Pollution Degree 1 means no pollution or only dry nonconductive pollution occurs The pollution has no influence e Pollution Degree 2 means that only nonconductive pollution occurs in most cases Occasionally however a temporary conductivity caused by condensation must be expected e Pollution Degree 3 means that conductive pollution occurs or dry nonconductive pollution occurs that becomes conductive due to condensation You must insulate signal connections for the maximum voltage for which the product is rated Do not exceed the maximum ratings for the product Do not install wiring while the product is live with electrical signals Do not remove or add connector blocks when power is connected to the system Avoid contact between your body and the connector block signal when hot swapping modules Remove power from signal lines before connecting them to or disconnecting them from the product National Instruments Corporation 1 5 NI ELVIS User Manual Chapter 1 DAQ System Overview Operate the product at or below the installation category marked on the hardware label Measurement circuits are subjected to working voltages and transient stresses overvoltage from the circuit to which they are connected duri
83. olving communications channels operator interface devices and or data acquisition and control interfaces Inch or inches The electrical characteristic of a circuit expressed in ohms and or capacitance inductance The characteristic of a coil that generates a voltage due to changes in the current An inductor creates a voltage that is the derivative of the current while a capacitor creates a voltage that is the integral of the current Junction Field Effect Transistor A three terminal semiconductor device constructed with a PN junction at its input and a conducting channel as the output section The PN junction of the input section is reverse biased to provide an extremely high input resistance A graphical programming language DIO output signal that pulses when data is ready on the write bus Light emitting diode G 6 ni com N NI DAQ NI DAQmx NPN transistor NRSE op amp PCB PCI peak to peak PFI National Instruments Corporation G 7 Glossary National Instruments driver software for DAQ hardware The latest NI DAQ driver with new VIs functions and development tools for controlling measurement devices A two junction bipolar semiconductor transistor with an N type negative ion collector and emitter and a P type positive ion base An NPN transistor is created by adding a thin layer of P type semiconductor material between two regions of N type material Nonreferenced single ended mode
84. on AI modes refer to the DAQ device documentation AIGND General AI Analog Input Ground AI ground reference for the DAQ device This ground signal is not tied to the NI ELVIS GROUND signals CH lt A B gt Oscilloscope Oscilloscope Channels A and B Positive input for the Oscilloscope channels CH A B Oscilloscope Oscilloscope Channels A and B Negative input for the Oscilloscope channels TRIGGER Oscilloscope Oscilloscope Trigger Trigger input for the Oscilloscope referenced to AIGND PFI lt 1 2 gt Programmable Function I O Programmable Function Input PFI 1 through 2 and PFI lt 5 7 gt 5 through 7 Programmable function I O of the DAQ device For more information about the PFI lines refer to the DAQ device documentation SCANCLK Programmable Function I O Scan Clock Connected to the SCANCLK pin of the DAQ device For more information about the SCANCLK signal refer to the DAQ device documentation RESERVED Programmable Function I O Connected to the EXTSTROBE pin of the DAQ device For more information about the EXTSTROBE signal refer to the DAQ device documentation 3 WIRE DMM Three Wire Voltage source for the DMM for three wire transistor measurements CURRENT HI DMM Positive Current Positive input for the DMM for all measurements besides voltage The NI ELVIS is ground referenced CURRENT LO DMM Negative Current Negative input for the DMM for all measurem
85. orkstation For instructions on removing the protection board refer to the Removing the Protection Board section 3 Check the fuses since these signals are much more likely to have been overloaded To check the fuse verify that the resistance across the fuse is less than 50 Q If all the fuses are operational proceed to the resistor packs 4 Verify that the resistance across each resistor is 100 Q 5 One resistor is located between each of the following pairs of pins 1 and 16 2 and 15 3 and 14 4 and 13 5 and 12 6 and 11 7 and 10 and 8 and 9 The resistor packs are socketed so that you can easily replace resistors B 2 ni com Appendix B Protection Board Fuses A Caution Before restoring power to the circuit be sure the problem that caused the protection board component to fail has been resolved to keep the same fuse or resistor from failing again If you need to replace a fuse use the fuse types listed in Table B 1 N Caution For continued protection against fire replace only with fuses of the same type and rating Refer to the Table B 1 for fuse types Table B 1 NI ELVIS Fuse Information Fuse Rating Fuse Type Manufacturer 0 5 A 250 V 5 x 20 mm LittelFuse Slow acting 0 5 A 250 V 2AG Fast acting LittelFuse 2 A 250 V 3AG Fast acting LittelFuse UN Caution The fuses on NI ELVIS are glass Use care when removing the fuses to prevent injury from broken glass National Instrumen
86. ource conflicts overview 3 11 table D 2 analog output DC power supplies 3 12 function generator 3 12 generic analog output 3 12 variable power supplies 3 13 counter timer signals 3 13 digital I O 3 13 overview 2 3 3 5 parts locator diagram 3 6 power supply 3 6 switch figure 3 2 signal descriptions table 3 7 theory of operation C 1 R RD ENABLE signal See also digital I O signal description table 3 9 related documentation xii removing protection board B 1 requirements DAQ hardware 3 1 NI ELVIS User Manual Index RESERVED signal description table 3 7 resistor packs location figure B 4 NI ELVIS components table B 4 resource conflicts table D 1 S safety information 1 5 specifications A 8 SCANCLK signal description table 3 7 resistor pack B 4 Scope See oscilloscope SFP instruments ARB 2 4 bode analyzer 2 5 digital bus reader SFP 2 5 digital bus writer 2 5 DMM 2 5 DSA 2 6 FGEN 2 6 impedance analyzer 2 6 instrument launcher 2 4 overview 2 3 resource conflicts table D 2 Scope 2 6 three wire current voltage analyzer 2 7 two wire current voltage analyzer 2 7 variable power supplies 2 7 signal descriptions table 3 7 software mode function generator 3 3 variable power supplies 3 3 NI resources E 1 specifications analog input A 1 bode analyzer A 2 NI ELVIS User Manual 1 8 DC power supplies 5 V supply A 2 15 V supply A 2 DMM curr
87. p workstation The prototyping board provides an area for building electronic circuitry and allows the connections necessary to access signals for common applications You can use multiple prototyping boards interchangeably with the NI ELVIS Benchtop Workstation Refer to the NJ ELVIS Prototyping Board section of Chapter 3 Hardware Overview for more information about the prototyping board including signal descriptions connection instructions and the parts locator diagram NI ELVIS Software SFP Instruments The NI ELVIS software created in LabVIEW takes advantage of the capabilities of virtual instrumentation The software includes two main types the soft front panel SFP instruments and the LabVIEW API for programming the NI ELVIS hardware NI ELVIS ships with the SFP instruments created in LabVIEW and the source code for the instruments You cannot directly modify the executable files but you can modify or enhance the functionality of these instruments National Instruments Corporation 2 3 NI ELVIS User Manual Chapter 2 NI ELVIS Overview NI ELVIS User Manual by modifying the LabVIEW code The instruments are virtual instruments VIs that are necessary in typical laboratory applications This section briefly describes each SFP instrument included with NI ELVIS The instrument software is LabVIEW based so you can customize the instruments by modifying the LabVIEW code Instrument Launcher The NI ELVIS Instrum
88. ph in length regarding interference and undesired operation The FCC rules have restrictions regarding the locations where FCC Class A products can be operated Consult the FCC Web site at www fcc gov for more information FCC DOC Warnings This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with the instructions in this manual and the CE marking Declaration of Conformity may cause interference to radio and television reception Classification requirements are the same for the Federal Communications Commission FCC and the Canadian Department of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user is required to correct the interference at their own expense
89. r for when you program with the LabVIEW Data Acquisition VIs ACHS is also used for measurements by the following NI ELVIS software instruments Oscilloscope DMM DSA Impedance Analyzer Two Wire Current Voltage Analyzer and Three Wire Current Voltage Analyzer ACHS might be unavailable if these software instruments are running Refer to the NI ELVIS Prototyping Board section of Chapter 3 Hardware Overview for an illustration of signal connections on the prototyping board Typical AI measurements include buffered continuous acquisitions and finite acquisitions with a start trigger For more information on how to perform an AI acquisition using NI DAQmx refer to the NI DAQmx documentation that shipped with the DAQ device Analog Output NI ELVIS allows access to the two analog outputs of a DAQ device through connectors on the prototyping board The AO signals labeled DACO and DACI connect to the signals of the same name on the NI ELVIS User Manual 4 2 ni com Chapter 4 Programming NI ELVIS DAQ device These signals can be used as normal output channels for any existing DAQ examples and for when you program with DAQ VIs Refer to the NJ ELVIS Prototyping Board section of Chapter 3 Hardware Overview for an illustration of signal locations on the prototyping board The output channels are also used by the following NI ELVIS SFP instruments FGEN DMM Impedance Analyzer Two Wire Current Voltage Analyzer and Three Wire Current Vol
90. rd resistor the onboard resistor is not included in the calculations The output to the NI ELVIS Prototyping Board is controlled by the prototyping board power switch Protection Board The output of the CURRENT HI is fused for overcurrent protection Simple shorts should not blow the fuse Prototyping Board and Benchtop Workstation Connectors When the NI ELVIS Prototyping Board is powered off the CURRENT HI pin from NI ELVIS User Manual C 8 ni com Appendix C Theory of Operation the prototyping board is disconnected however the NI ELVIS Benchtop Workstation control panel connection is always connected DAQ Device The DAQ device reads the reference sine wave on AI 5 The AI 5 voltage reading is the input from the NI ELVIS to the DUT CURRENT LO The hardware connection to the CURRENT LO pin is shown in Figure C 6 The paragraphs that follow the figure describe each section of the figure in more detail Impedance Analyzer Signal Path A B C D Prototyping Protection Board NI ELVIS Motherboard DAQ Device Board i 1 i Gain i Gain CURRENTLO i i i i H Gain H i Benchtop Workstation Fuse Switch Gain HH Control Panel O LoG 1 9Al7 i 1 MUX i CURRENT Lo o E a xul Al 15 Y Figure C 6 CURRENT LO Block Diagram Prototyping Board and Benchtop Workstation Connectors When the NI ELV
91. rkstation 3 68 Pin E Series Cable Figure 2 1 The NI ELVIS System NI ELVIS Hardware The following sections briefly describe the hardware components of NI ELVIS For more specific information about these components refer to Chapter 3 Hardware Overview NI ELVIS User Manual 2 2 ni com Chapter 2 NI ELVIS Overview NI ELVIS Benchtop Workstation The benchtop workstation and the DAQ device together create a complete laboratory system The workstation provides connectivity and functionality The control panel on the workstation provides easy to operate knobs for the function generator and variable power supplies and it offers convenient connectivity in the form of BNC and banana style connectors to the NI ELVIS Scope SFP and NI ELVIS DMM SFP The NI ELVIS software routes signals in the NI ELVIS Benchtop Workstation between the SFP instruments For example the output of the function generator may be routed to a specific channel of the DAQ device and ultimately acquired on a desired channel of the NI ELVIS Scope SFP The benchtop workstation also contains a protection board that protects the DAQ device from possible damage resulting from laboratory errors Refer to the NJ ELVIS Benchtop Workstation section of Chapter 3 Hardware Overview for more detailed information about the benchtop workstation including the parts locator diagram NI ELVIS Prototyping Board The NI ELVIS Prototyping Board connects to the benchto
92. rototyping Board and how you can use it to connect circuits to NI ELVIS This section also describes the signals that you can connect to NI ELVIS from the prototyping board and the connectors you can use to do so UN Caution Ensure the power to the prototyping board is off before inserting the prototyping board into the NI ELVIS benchtop workstation The prototyping board connects to the benchtop workstation with a standard PCI connector so you can create custom PCBs to interact with NI ELVIS The prototyping board exposes all the signal terminals of the NI ELVIS to the user through the distribution strips on either side of the breadboard area Each signal has a row and the rows are grouped by function National Instruments Corporation 3 5 NI ELVIS User Manual Chapter 3 Hardware Overview Refer to Figure 3 2 for the parts locator diagram for the prototyping board NATIONAL U lI f Ni Evis INSTRUMENTS PROTOTYPING BOARD 8 78 loo BABES BEBES a oll Goo BBSBE BREE oglljiaoog um Ei ei 2 18 BB gegen apne ble aa Beec seeue Gji B ES Fo S 9 Gases oomoo Elle 38 8 Boss suede Sp 8 LED Aray d Er EE NE EAS S glo ERES Ss gig Els ighals D Dor BANANA a 8 Elle Goes ses ells ells Base
93. s a aaaea B3 3 Ex Seve BJB memes mem alle aa geago poog gji 3 Eme n eses ejje unu umm ole 9 ooon EEN meet Sm le 3 iia gaene seama ale ais Essss gegee Sl S selo BJS esse Somos SIB gs nom gamag Sa gls vele 7 8 8 B gaama ese SIB djs esse mamoe Bjs 8 On genre mo 8 8 caooo Donos DS ojo HBB aooaa ojja e s O BANANA C fo m9 908 sess co000 BE E ssessseeem E Bees Os zc B gesso gagag olle oi SSB papap 3 9 emm 8 BBHBE Beas Blig as 6888 BEHEA 8 Os o BBBBH Googe olle do BBBBB Ganso g O emo ol EBEE Besa GE BEM Besa Sio eim o DIU 8 popp Buena lg a2 meeog gomma ESTO mento ojjjo ooooo ooooo ello aje ooooo ooooo ejflia Se Wwa Ee 8 81 9 ooooo ooooo Sje 89 ooo ooooo B 9 cree ac che selo BB Bases meeeg Bile sjo Sessa gos gis B ERST ose 060 noto aj js i oljo elo ojja o so L Tuo 8 E E o0000 00000 ajja as BBB EBHHEH 2 3 8 ims I mm ooooo ooooo nonum goooo o BRA BO oO a ollo ana D jha O ups zese pie Genea s aaaea olig gis eses ganea EE glo kd D o o oooo00 nuuun aln ana nnunnun nuuun ofj O osusrma Le o oljo coooo ooooo Ole oj nusnmu nu e O Visit Rarer k B E a ooooo ooooo oll E d ooooo ooooo S 13 B meme man ooo00 ooo poooo nunnn i Ef SS E fB Banan s gomme Ble SS Doe suas S P3 8 sara terno gt Wwe com 5B So onono guess colle d o comme eme os ia aid v ASV 0000 ooooo goooo lo ol oo000 ooooo 13000 cruo Supply prd o E o A eme almas ven sures O AA
94. setting NI ELVIS User Manual Glossary DI differential input digital trigger DIO diode DMM DO DOC DSA DUT E ECG EEPROM ELVIS EMC EMI EXTSTROBE FCC FGEN NI ELVIS User Manual Digital I O input signals sent to the DI bus An analog input consisting of two terminals both of which are isolated from computer ground whose difference is measured A TTL level signal having two discrete levels a high level and a low level Digital VO A specialized electronic component with two electrodes called the anode and the cathode Digital multimeter Digital I O output signals from the DO bus Canadian Department of Communications Dynamic signal analyzer Device under test Electrocardiogram Electrically erasable programmable read only memory ROM that can be erased with an electrical signal and reprogrammed Educational Laboratory Virtual Instrumentation Suite Electromechanical compliance Electromagnetic interference External strobe signal Federal Communications Commission Function generator G 4 ni com floating signal sources FM IN FREQ OUT frequency front panel FUNC OUT G gain GPCTRO GATE GPCTRO OUT GPCTRO SOURCE GPCTRI GATE GPCTRI OUT GPCTRI SOURCE GROUND O National Instruments Corporation G 5 Glossary Signal sources with voltage signals that are not connected to an absolute reference or system ground Also called nonreferenced s
95. sine wave software selectable Voltage Measurement AC Accra Vaina lid 0 3 001 full scale A E 14 Vms in four ranges max DC ACUC iia 0 3 001 full scale max R nge cnet tes x20 V in four ranges max Input impedance sss 1 MO 1 The Two Wire Current Voltage Analyzer SFP is the recommended instrument for diode measurement 2 100 Hz to 10 kHz NI ELVIS User Manual A 4 ni com Dynamic Signal Analyzer Input range eene Input resolution Function Generator Frequency range Software controlled frequency resolution Frequency set point accuracy Appendix A Specifications x10 V in four ranges 12 bits or 16 bits DAQ device dependant 5 Hz 250 kHz in five ranges 0 8 3 of range max Frequency read back accuracy 0 01 Output amplitude 2 5 V Software amplitude resolution 8 bits OT AAA teas 5 V AM voltage sese eee 10 V max Amplitude modulation Up to 100 EM volt g nr rri 10 V max Amplitude flatness T0 50 KHz cercare ke 0 5 dB To 250 KHz inicia 3 dB Frequency modulation Output impedance Impedance Analyzer Measurement frequency range National Instruments Corporation A 5 5 of full scale max 50 Q guaranteed Refer to Appendix C Theory of Operation for more inform
96. system ground such as the earth or a building ground Also called grounded signal sources The resistance to the flow of electric current One ohm 2 is the resistance through which one volt of electric force causes one ampere to flow Root mean square Seconds Samples Samples per second used to express the rate at which a DAQ device samples an analog signal Scan clock signal Abbreviation for oscilloscope TTL signal of the same frequency of the function generator Timing I O Trigger signal G 8 ni com trigger TRIGGER TTL V VI VOLTAGE Vp p W waveform WR_ENABLE National Instruments Corporation G 9 Glossary Any event that causes or starts some form of data capture Trigger input signal for the oscilloscope Transistor to transistor logic Volts Virtual instrument a combination of hardware and or software elements typically used with a PC that has the functionality of a classic stand alone instrument Input signals for the DMM voltmeter Peak to peak voltage Multiple voltage readings taken at a specific sampling rate DIO output signal that indicates data is being written to the write bus NI ELVIS User Manual Index Symbols 5 V 5 V power supply prototyping board power 3 6 specifications A 2 5V signal See also DC power supplies connecting analog output signals 3 12 signal description table 3 8 fuse figure B 4 15 V 15 V sig
97. system to meet unpredictable needs Research and instructional efforts also require that their systems be economical Because you can reuse components in a virtual instrumentation system without National Instruments Corporation 1 8 NI ELVIS User Manual Chapter 1 DAQ System Overview purchasing additional hardware or software virtual instrumentation is an economical choice Finally measurement systems must be scalable to meet future expansion needs The modular nature of virtual instrumentation makes it easy for you to add new functionality NI ELVIS Overview NI ELVIS User Manual NI ELVIS uses LabVIEW based software instruments a multifunction DAQ device and a custom designed benchtop workstation and prototyping board to provide the functionality of a suite of common laboratory instruments The LabVIEW software that you use to interact with the NI ELVIS Benchtop Workstation and the DAQ device provides a high level programming environment for easy implementation of the sophisticated display and analysis capabilities required for virtual instrumentation The NI ELVIS hardware provides a function generator and variable power supplies from the benchtop workstation The NI ELVIS LabVIEW soft front panel instruments combined with the functionality of the DAQ device provide the functionality of the following SFP instruments e Arbitrary Waveform Generator ARB e Bode Analyzer Digital Bus Reader e Digital Bus Writer e Digi
98. tage Analyzer The output channels may not be available if these SFP instruments are running Typical AO applications include continuous waveform generation and single point output updates For more information on how to perform AO generation using NI DAQmx refer to the NI DAQmx documentation that shipped with the DAQ device Timing and Control 1 0 NI ELVIS provides access to the two counter timers of the DAQ device Table 4 1 shows how NI ELVIS counter signals correlate with DAQ device timing signals Table 4 1 Counter Signal Correlations NI ELVIS DAQ Device CTR 0 1 SOURCE GPCTR O0 1 SOURCE CTR 0 1 GATE GPCTR O0 1 GATE CTR 0 1 OUT GPCTR O0 1 OUT CTRO and CTRI can be used as normal counter timers for any existing DAQ examples and for when you program with DAQ VIs The counter timers are also used by the NI ELVIS FGEN SFP The counter timers might be unavailable if the NI ELVIS FGEN SFP is running Refer to the NJ ELVIS Prototyping Board section of Chapter 3 Hardware Overview for an illustration of signal connections on the prototyping board Typical counter timer applications include pulse train generation event counting and frequency measurement For more information on how to National Instruments Corporation 4 3 NI ELVIS User Manual Chapter 4 Programming NI ELVIS perform counter timer measurements using NI DAQmx refer to the NI DAQmx documentation that shipped w
99. tal Multimeter DMM Dynamic Signal Analyzer DSA Function Generator FGEN e Impedance Analyzer e Oscilloscope Scope e Two Wire Current Voltage Analyzer e Three Wire Current Voltage Analyzer e Variable Power Supplies Refer to Figure 2 1 The NI ELVIS System for an illustration of NI ELVIS 1 4 ni com Chapter 1 DAQ System Overview Safety Information The following section contains important safety information that you must follow when installing and using the product Do not operate the product in a manner not specified in this document Misuse of the product can result in a hazard You can compromise the safety protection built into the product if the product is damaged in any way If the product is damaged return it to National Instruments for repair Do not substitute parts or modify the product except as described in this document Use the product only with the chassis modules accessories and cables specified in the installation instructions You must have all covers and filler panels installed during operation of the product Do not operate the product in an explosive atmosphere or where there may be flammable gases or fumes If you must operate the product in such an environment it must be in a suitably rated enclosure If you need to clean the product use a soft nonmetallic brush Make sure that the product is completely dry and free from contaminants before returning it to service Operate the pr
100. the type of example or you can find examples by selecting Find Examples and then searching for NI ELVIS Variable Power Supplies The NI ELVIS Benchtop Workstation has two variable power supplies that can be controlled using the NI ELVIS instrument driver The driver allows the user to select which supply to control and to set its output voltage A simple variable power supply application is shown in Figure 4 1 Figure 4 1 Simple Variable Power Supply Application The supply to control is selected during initialization and then updated continuously in the loop When the loop ends the supply reference is closed and the output is set to zero The DAQ device number is provided to identify the DAQ device that is cabled to the NI ELVIS Benchtop Workstation Refer to the NI ELVIS Help for more information about the specific VIs in the variable power supply API National Instruments Corporation 4 5 NI ELVIS User Manual Chapter 4 Programming NI ELVIS Function Generator NI ELVIS User Manual The NI ELVIS Benchtop Workstation has a function generator that can be controlled using the NI ELVIS instrument driver The driver allows the user to update the frequency peak amplitude DC offset and type of the waveform that the function generator outputs A simple application is shown in Figure 4 2 Figure 4 2 Simple Function Generator Application The output of the function generator is set to zero during in
101. tion gain error correction for NI ELVIS and the DAQ device e Inductance Offset system inductance offset error correction NI ELVIS and the DAQ device e Capacitance Offset system capacitance offset error correction NI ELVIS and the DAQ device e CA SLOPE actual calibrated value of each feedback resistor four values The software acquires two waveforms from differential channel seven the signal and AI 5 the reference channel and applies the following formula Gain Amplitude Reference Amplitude Signal Amplitude Gain Amplitude is combined with the feedback resistor used on the NI ELVIS to determine the impedance CA Slope is calibrated at the factory to determine the actual impedance for the feedback resistor Impedance Z CA Slope Gain Amplitude Zis combined with the phase to determine the resistive and reactive components of the DUT The phase difference of the acquired sine waves is measured in reference to AI 5 Resistance Z x cos Phase x 1 180 C 10 ni com Appendix C Theory of Operation Reactance Z x sine Phase x 1 180 Susceptance l Reactance To determine the inductive or capacitive elements of the DUT Reactance and Susceptance The magnitude of the phase determines which element is present The frequency is the frequency you set Inductance Reactancel2 x x x Frequency Inductance Offset Capacitance Susceptancel 2 x x x Frequency Capacitance Offset Each inductance and capacitanc
102. tions to fixed installations Installation Category IV is for measurements performed at the primary electrical supply installation 1 000 V Examples include electricity meters and measurements on primary overcurrent protection devices and on ripple control units Installation categories also referred to as measurement categories are defined in electrical safety standard IEC 61010 1 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation 5 MAINS is defined as a hazardous live electrical supply system that powers equipment Suitably rated measuring circuits may be connected to the MAINS for measuring purposes NI ELVIS User Manual 1 6 ni com NI ELVIS Overview NI ELVIS combines hardware and software into one complete laboratory suite This chapter provides an overview of the hardware and software components of the NI ELVIS Additionally this chapter discusses how NI ELVIS can be used in various academic environments Chapter 3 Hardware Overview provides more detailed information about NI ELVIS hardware components Refer to the NJ ELVIS Help for more information about the software components Refer to Figure 2 1 for a diagram of the NI ELVIS system National Instruments Corporation 2 1 NI ELVIS User Manual Chapter 2 NI ELVIS Overview 1 Computer Running LabVIEW 4 NIELVIS Prototyping Board 2 DAQ Device 5 NI ELVIS Benchtop Wo
103. ts Corporation B 3 NI ELVIS User Manual Appendix B Protection Board Fuses Figure B 2 shows the location of the different fuses for the NI ELVIS hardware and the location of the resistor packs RP1 RPS 500 mA S B 5x20mm 00000000 00000000 2AFB 3AG TO 5AL250V 5V F2AL250V 3 WIRE 00000000 o0000000 d ve 3 CURRENT HI uic ad To PROTOTYPING BOARD 9 9 9 0 o o 00000000 k 90000000 00000000 Foo MA E TE d O FRONT PANE 00000000 00000000 asl N EP CURRENT LO 90000000 20000000 E gt j gt 2 BROTOTYPING BQARD APA R3 RPS AR a SN lh Y 20000000 00000000 For P tents Wi com patents Dual in line Isolated A Fire Hazard 100 Q 300 mW Resistor Do not use plastic chips Networks 7 WF NATIONAL NI ELVIS 5 P INSTRUMENTS PROTECTION BOARD gt 0 0 0 0 0 0 0 0 0 0 0 0 O 0 0 obo 0 0 0 0 0 0 0 0 0 OOO g C B g 1 DAC lt 0 1 gt Fuses 4 15 V Fuses 6 Resistor Packs 2 3 WIRE Fuse 5 Variable Power Supplies Fuses 7 CURRENT Fuses 3 5V Fuse Figure B 2 Parts Locator Diagram for NI ELVIS Protection Board Table B 2 shows the relationship between the resistor packs and the NI ELVIS components Table B 2 Resistor Packs and NI ELVIS Components Resistor Pack NI ELVIS Component RP1 analog input RP2 analog input RP3 AM IN FUNC
104. w current control lines Connecting Counter Timer Signals The prototyping board provides access to the DAQ device counter timer inputs which are also accessible from software These inputs are used for counting TTL signals and for edge detection The CTRO SOURCE CTRO GATE CTRO OUT CTR1 GATE and CTR1 OUT signals are National Instruments Corporation 3 13 NI ELVIS User Manual Chapter 3 Hardware Overview equivalent to the DAQ device GPCTRO SOURCE GPCTRO GATE GPCTRO OUT GPCTRI GATE and GPCTR1 OUT pins respectively Refer to the DAQ device documentation for details on using and configuring counter timers The FREQ OUT signal is equivalent to the DAQ device FREQ OUT signal Refer to the DAQ device documentation for more information about this signal Connecting User Configurable Signals NI ELVIS User Manual The prototyping board provides several different user configurable connectors four banana jacks two BNC connectors and a D SUB connector Each pin of the connector has a connection to the distribution strips of the prototyping board Eight LEDs are provided for general digital output The anode of each LED is connected to the distribution strip through a 220 Q resistor and each cathode is connected to ground Refer to Table 3 1 for more information about the signal names for the user configurable I O connectors 3 14 ni com Programming NI ELVIS An NI ELVIS measurement system is composed of the NI EL
105. ystems or provide a stimulus so that the DAQ system can measure a response Most DAQ devices have four standard elements analog input AD analog output AO digital I O DIO and counter timers The most common National Instruments DAQ devices are the E Series devices The DAQ Hardware section of Chapter 3 Hardware Overview describes in greater detail the DAQ device used as part of the NI ELVIS Refer to the DAQ device documentation at ni com manuals for specific information about the functionality and operation of the device NI ELVIS User Manual 1 2 ni com Chapter 1 DAQ System Overview LabVIEW LabVIEW is a graphical programming language frequently used for creating test measurement and automation applications LabVIEW uses icons instead of lines of text to create applications Unlike text based programming languages LabVIEW uses dataflow programming where the flow of data determines execution In LabVIEW you build a user interface by using a set of tools and objects The user interface is known as the front panel You then add code using graphical representations of functions to control the front panel objects The block diagram contains this code In some ways the block diagram resembles a flowchart A virtual instrument VI is a LabVIEW program that models the appearance and function of a physical instrument The flexibility modular nature and ease of use programming possible with LabVIEW makes it popular in top univ

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