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NI Educational Laboratory Virtual Instrumentation Suite (NI ELVIS

1. Symbol Prefix Value p pico 10 2 n nano 10 micro 10 6 m milli 10 3 k kilo 103 M mega 106 Symbols Percent Negative of or minus Positive of or plus Per i Degree Q Ohm Plus or minus d Square root A A Amperes AC Alternating current ACH Analog input channel signal ADDRESS The DIO output signals of the address bus National Instruments Corporation G 1 NI ELVIS User Manual Glossary Al AI GND AI SENSE AM AM IN amplification amplitude AO ARB block diagram BNC 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 wir
2. 3 3 Figure 3 2 Prototyping Board Parts Locator Diagram eee 3 7 Figure 4 1 Simple Variable Power Supply Application sess 4 5 Figure 4 2 Simple Function Generator Application see 4 6 Figure 4 3 Simple DMM Application nennen 4 7 Figure 4 4 Simple Digital Input Application eene 4 8 Figure 4 5 Simple Digital Output Application esee 4 8 Figure B 1 NI ELVIS Benchtop Workstation with Protection Board Removed B 1 Figure B 2 Parts Locator Diagram for NI ELVIS Protection Board B 3 Figure C 1 NI ELVIS Voltmeter Block Daeram eee C 2 Figure C 2 NI ELVIS Current Meter Block Diagram eene CA Figure C 3 Function Generator Block Diagram eee C 6 National Instruments Corporation Vii NI ELVIS User Manual Contents Figure CA Impedance Analyzer Block Daeram eee C 7 Figure C 5 CURRENT HI Block Diagram eee C 8 Figure C 6 CURRENT LO Block Diagram eene C 9 Figure C 7 Two Wire Measurement Block Diagram eese C 12 Figure C 8 Three Wire Measurement Block Diagram eese C 14 Figure C 9 Analog Output Block Diagram eene C 16 Figure D 1 Possible Resource Conflcts sss sees sees D 2 Tables Table 3 1 Signal Descriptions eee adhesin a 3 8 Table 3 2 Analog Input Signal
3. 1 Vp p sine wave software selectable Resistance Measurement A CCULACY eei s tdi redd ect 196 RINSE ees demere tete 5 Q to 3 MO in four ranges Test frequency eee 120 Hz software selectable Test frequency voltage 1 Vp p sine wave software selectable Voltage Measurement AC ACCUTACy see 0 3 001 full scale Range siete terere ns 14 V a in four ranges max DC A CCULACY s etate eye 0 3 001 full scale max Range ic seed Ru 20 V in four ranges max Input impedance sss sese eee ee eee eee 1MQ The Two Wire Current Voltage Analyzer SFP is the recommended instrument for diode measurement 2 100 Hz to 10 kHz National Instruments Corporation A 5 NI ELVIS User Manual Appendix A Specifications Dynamic Signal Analyzer Input range eere Input resolution Function Generator Frequency range Software controlled frequency resolution Frequency set point accuracy x10 V in four ranges 12 or 16 bits DAQ device dependant 5 Hz to 250 kHz in five ranges 0 896 396 of range max Frequency read back accuracy 0 01 Output amplitude 2 5 V Software amplitude resolution 8 bits Offset range sse 5 V AM voltage eere 10 V max Amplitude modulation Up to 10096 FM Voltage ety e ies 10 V m
4. 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 signal 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 0 gate signal available from a DAQ device General purpose counter timer 0 output signal available from a DAQ device General purpose counter timer 0 clock source signal available from a DAQ device General purpose counter timer 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 IO 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 kn
5. 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 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 I O 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 GPCTR1_GATE GPCTR1_OUT GPCTR1_SOURCE GROUND
6. 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 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 le 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 DAQ and then choosing 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 you can control using the NI ELVIS instrument driver The driver allows you 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
7. The instruments are virtual instruments VIs that are necessary in typical laboratory applications Instrument Launcher The NI ELVIS Instrument 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 enabled 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 the Where to Start with NI ELVIS document 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 therefore cannot 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
8. board The output bus logic is 5 V TTL for high level and 0 V TTL for low level DI 0 7 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 for more information about these signals 3 14 ni com Chapter 3 Hardware Overview 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 low 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 equivalent to the DAQ device GPCTRO_SOURCE GPCTRO_GATE GPCTRO_OUT GPCTR1_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 sig
9. output of the gain circuit runs through a 50 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 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 i gt CURRENT HI o AI 5 Function l Generator i Ki DUT CURRENT LO o 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 th
10. 1 gt _GATE CTR 0 1 OUT GPCTR O0 1 OUT You can use CTRO and CTR1 as normal counter timers for any existing DAQ examples and 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 National Instruments Corporation 4 3 NI ELVIS User Manual Chapter 4 Programming NI ELVIS Refer to Figure 3 2 Prototyping Board Parts Locator Diagram 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 about how to perform counter timer measurements using NI DAQmx refer to the NI DAQmx documentation that shipped with the DAQ device The NI ELVIS workstation 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 about the PFI pins refer to the DAQ device documentation For more information about 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 prog
11. 2 4 Bode Aaly e enr patet pe ee ette en 2 5 Digital Bu s Read r uv REENEN EENS ers 2 5 Digital Bus Writer eee etel E 2 5 Digital Multimeter DMM 2 5 Dynamic Signal Analyzer DSA esee 2 6 Function Generator FGEN sss 2 6 Impedance Analyzer a cae sect etr tte 2 6 Oscilloscope Scope eee tte ette rent ts 2 6 Two Wire and Three Wire Current Voltage Analyzers 2 7 Variable Power Supplies 2 7 NEBEVIS LabVIEW EL iine irte eripe np p ERE edes 2 7 NI ELVIS Calibration Utility eene nennen nennen 2 7 NI ELVIS in Academic Discplnes nennen 2 8 NI ELVIS in Engineering eese eene teen tenen nenne nennen 2 8 NI ELVIS in Biological Soiences sss veses seene ennenen ennenen nnn 2 8 NI ELVIS in Physical Beienceg sese 2 9 National Instruments Corporation V NI ELVIS User Manual Contents Chapter 3 Hardware Overview DAQ Hard Wate sites uet ce e t te HN 3 1 Using the DAQ Hardware in Bypass Mode 3 1 NI ELVIS Benchtop Workstation eese eene eere 3 2 NI ELVIS Protection Board 3 5 NLELVIS Prototyping Board assez i ette diede 3 6 Prototyping Board Powers sees sese sese 3 7 Prototyping Board Signal Descrgpttong 3 8 Connecting Signals eet ettet td lun ERE anas SEENEN 3 11 Grounding Considerations eese 3 11 Connecting Analog Input Signals eene 3 11 Generic Analog Input eene ptit nei 3 11 Resource Conflicts 5 iiit eth eter
12. 7 GN 4 O S N O dgro o ce o e o Er 6 9766 6 6 2 Hazard serm co Isolated Baroness plastic chips Resistor Hotworks NATIONAL m NI ELVIS AN o INSTRUMENTS PROTECTION BOARD o O Power Supply 5 15 V Current Limiting Circuitry Power Supply 6 15V Current Limiting Circuitry CURRENT Fuses Resistor Packs lt 1 8 gt 7 5 V Current Limiting Circuitry National Instruments Corporation Figure B 2 Parts Locator Diagram for NI ELVIS Protection Board B 3 NI ELVIS User Manual Appendix B Protection Board Fuses Table B 1 shows the relationship between the resistor packs and the NI ELVIS components Table B 1 Resistor Packs and NI ELVIS Components Resistor Pack NI ELVIS Component RP Analog input RP2 Analog input RP3 AM_IN FUNC_OUT SYNC_OUT AI SENSE RPA Counter timer I O RDS Digital output 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 NI ELVIS User Manual Reinsert the PCI connector of the protection board into the benchtop workstation rear connector Tighten the four captive screws located on the back of the protection board Plug in the 68 pin cable and the power supply Plug in the power cable Power on NI ELVIS B 4 ni
13. Appendix A Specifications National Instruments Corporation 3 13 NI ELVIS User Manual Chapter 3 Hardware Overview 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 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 SUPPLY 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 NI ELVIS User Manual 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 buses 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
14. CTR1_GATE signal connecting counter timer signals 3 15 National Instruments Corporation Index counter signal correlations table 4 3 signal description table 3 10 CTR1_OUT signal connecting counter timer signals 3 15 counter signal correlations table 4 3 signal description table 3 10 CTR1_SOURCE signal connecting counter timer signals 3 15 counter signal correlations table 4 3 signal description table 3 10 CURRENT HI signal See also DMM connecting analog input signals 3 13 fuses figure B 3 signal description table 3 8 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 13 fuses figure B 3 impedance analyzer theory of operation figure C 9 signal description table 3 8 theory of operation DMM C 3 three wire current voltage analyzer C 13 two wire current voltage analyzer C 12 DAC lt 0 1 gt signals See also analog output connecting analog output signals 3 13 NI ELVIS User Manual Index fuses figure B 3 internally using caution 3 13 signal description table 3 9 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 requirements 3 1 t
15. DUT passes through a fuse on the protection board This fuse adds resistance to the measurement National Instruments Corporation C 9 NI ELVIS User Manual Appendix C Theory of Operation 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 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 correction 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 correct
16. ELVIS AO circuitry The paragraphs that follow the figure describe each section of the figure in more detail National Instruments Corporation C 15 NI ELVIS User Manual Appendix C Theory of Operation DAQ Device AO lt 0 1 gt NI ELVIS Motherboard Prototyping 10 KO Board NNN 15 100 pF ZN 200 100 WANN ANN DAC lt 0 1 gt NI ELVIS User Manual Figure C 9 Analog Output Block Diagram Prototyping Board You can only access the output channels of the NI ELVIS DAC lt 0 1 gt on the prototyping board When the prototyping board is powered off the output is disconnected 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 DACH and DAC on the prototyping board 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 NIELVIS analog output In order to generate waveforms or patterns the DAQ device must have buffered output C 16 ni com Resource Conflicts Figure D 1 summarizes the resource conflicts you might encounter if you run certain NI ELVIS circuitry simultaneously The variable power supplies and digital circuitry are not i
17. 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 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 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 NI ELVIS User Manual Glossary R RD_ENABLE referenced signal sources resistance rms S S s SCANCLK Scope SFP SYNC_OUT T TIO TRIG trigger TRIGGER TTL NI ELVIS User Manual Read enable signal DIO output signal that indicates when data is being read from the read bus Signal sources with voltage signals that are r
18. Vc in the Three Wire Current Voltage Analyzer SFP 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 resistor and for V use the CH5 voltage Ib Amps CHS voltage The Base current Ib is not displayed on the SFP 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 C 14 ni com Appendix C Theory of Operation 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 Ie Pag B is not displayed on the SFP Arbitrary Waveform Generator Analog Output The NI ELVIS buffers the output from the DAQ device This buffer prevents damage to the DAQ device The NI ELVIS is protected against overvoltage and overcurrent conditions Figure C 9 shows a basic block diagram of the NI
19. You can load waveforms created with the NI Waveform Editor into the ARB SFP to generate stored waveforms Refer to the NJ ELVIS Help for more information about the Waveform Editor Because a typical DAQ device has two AO channels two waveforms may be simultaneously generated You can choose continuous output or a single 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 logarithmic 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 1s 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 an
20. data is ready on DO lt 0 7 gt National Instruments Corporation 3 9 NI ELVIS User Manual Hardware Overview Chapter 3 Hardware Overview Table 3 1 Signal Descriptions Continued Signal Name Type Description GLB RESET DIO Global Reset Active low signal that is used to reset all of the NI ELVIS hardware settings 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 by the NI ELVIS Digital Bus Reader SFP to acquire digital data ADDRESS 0 3 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 GPCTRI GATE signal refer to the DAQ device documentation CTRI OUT Counters Counte
21. economical Because you can reuse components in a virtual instrumentation system without National Instruments Corporation 1 3 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 SFP 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 e Digital Bus Reader e Digital Bus Writer e Digital Multimeter DMM e Dynamic Signal Analyzer DSA e Function Generator FOEN e Impedance An
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23. output drops by 50 of the load regulation specification National Instruments Corporation A 3 NI ELVIS User Manual Appendix A DMM Specifications Capacitance Measurement ee e 1 R ng eee ee 50 pF to 500 uF in three ranges Test frequency sisisi eiin 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 rettet 3 89 V software selectable Current Measurement Accuracy EE teg A E derer Geis 0 25 3 mA ipo 0 25 3 mA Common mode voltage 20 V max Common mode rejection 70 dB min ng cu sesneae SERRE 250 mA in two ranges max Resolugon dostaio haisser 12 or 16 bits DAQ device dependent Shunt resistance sss eee eee ester eee 0 50 Voltage burden sess 2 mV mA 1 25 Hz to 10 kHz 2 Proper null correction when measuring on high common mode voltage can reduce the 3 mA offset error to 200 LA of noise NI ELVIS User Manual A 4 ni com Appendix A Specifications Diode Measurement Voltage threshold 1 1 V max Inductance Measurement ACCUEAC x eset ette aed ac eed 196 Range ee 100 uH to 100 mH Test frequency eee 950 Hz software selectable Test frequency voltage
24. 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 benchtop 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 The NI ELVIS software created in LabVIEW takes advantage of the capabilities of virtual instrumentation The software includes SFP instruments and the LabVIEW API for programming the NI ELVIS hardware National Instruments Corporation 2 3 NI ELVIS User Manual Chapter 2 NI ELVIS Overview SFP Instruments NI ELVIS User Manual 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 by modifying the LabVIEW code
25. software instruments bode analyzer SFP 2 5 DMM SFP 2 5 DSA SPP 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 13 DAQ hardware in bypass mode 3 2 hardware instruments function generator controls 3 4 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 15 API overview 2 7 programming NI ELVIS using NI DAQmx 4 2 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 15 BANANA lt A D gt signals connecting user configurable I O signals 3 15 NI ELVIS User Manual connector locations figure 3 7 signal description table 3 9 benchtop workstation controls and indicators 3 3 overview 2 3 parts locator diagram 3 3 removing protection board B 1 theory of operation C 1 BNC lt 1 2 gt signals connecting user configurable I O signals 3 15 signal description table 3 9 BNC lt 1 2 gt signals connecting user configurable I O signals 3 15 signal description table 3 9 bode analyzer resource conflicts table D 2 SFP overview 2 5 specifications A 2 by
26. the CURRENT HI pin from 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 i i i i Gain I4 Gain 4 CURRENT LO i i i EE Gain i Benchtop eus Workstation Switch ain Control i Panel 7 90AI 7 i i MUX i f OO OAI 15 CURRENTLO wA wA Note This CURRENT LO signal routes first to the motherboard and then to the protection board as shown Figure C 6 CURRENT LO Block Diagram Prototyping Board and Benchtop Workstation Connectors When the NI ELVIS 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
27. 15 V signal See also DC power supplies signal description table 3 9 15 V signal See also DC power supplies connecting analog output signals 3 13 signal description table 3 9 15 V power supply prototyping board power 3 7 specifications A 2 15 V signal connecting analog output signals 3 13 fuses figure B 3 Numerics 3 WIRE signal See also DMM connecting analog input signals 3 13 fuse figure B 3 signal description table 3 8 three wire current voltage analyzer theory of operation C 13 National Instruments Corporation A academic use of NI ELVIS 2 8 2 9 ACH lt 0 5 gt signals analog input signal mapping table 3 12 signal description table 3 8 ACH lt 0 5 gt signals analog input signal mapping table 3 12 signal description table 3 8 ADDRESS lt 0 3 gt signals See also digital I O resistor pack B 4 signal description table 3 10 AI GND signal analog input signal mapping table 3 12 connecting analog input signals 3 11 signal description table 3 8 AI SENSE signal analog input signal mapping table 3 12 connecting analog input signals 3 11 resistor pack B 4 signal description table 3 8 AM IN signal See also function generator connecting analog output signals 3 14 resistor pack B 4 signal description table 3 9 analog input connecting signals 3 11 DAQ hardware in bypass mode 3 2 resistor packs B 4 resource conflicts 3 12 signal mapping table 3 12
28. ACH4 AI 12 ACH5 AI5 ACH5 AI 13 AISENSE AI SENSE AIGND AI GND Caution By co 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 you can still use the channel You can use ACH lt 0 2 gt 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 ACH4 to avoid double driving the channels For more information about possible resource conflicts refer to Appendix D Resource Conflicts nnecting 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 NI ELVIS User Manual 3 12 ni com Chapter 3 Hardware Overview 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 pi
29. DAQ device documentation RESERVED Programmable Function I O Pin 45 connected to the EXTSTROBE pin of the E Series DAQ device or PFI 10 of M Series device For more information 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 measurements besides voltage The NI ELVIS is ground referenced NI ELVIS User Manual 3 8 ni com Chapter 3 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 Analog Outputs 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 TTL 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
30. 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 1 22 User Configurable I O BNC Connectors 1 and 2 Connects to the BNC pins SUPPLY Variable Power Supplies Positive Output of 0 to 12 V variable power supply GROUND Variable Power Supplies Ground Prototyping board ground These ground pins are connected together SUPPLY Variable Power Supplies Negative Output of 12 to 0 V variable power supply 15 V DC Power Supplies 15 V Source Output of fixed 15 V power supply referenced to the GROUND signal 15V DC Power Supplies 15 V Source Output of fixed 15 V power supply referenced to the GROUND signal GROUND DC Power Supplies Ground Prototyping board ground These ground pins are connected together 45V DC Power Supplies 5V Source Output of fixed 5 V power supply referenced to the GROUND signal DO lt 0 7 gt DIO Digital Output Lines 0 through 7 Output of the write bus These channels are used by 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
31. IS 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 Workstation 3 68 Pin E M Series Cable Figure 2 1 The NI ELVIS System NI ELVIS User Manual 2 2 ni com Chapter 2 NI ELVIS Overview 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 Benchtop Workstation Together the benchtop workstation and the DAQ device create a complete laboratory system The workstation provides connectivity and functionality The workstation control panel 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 you can route the output of the function generator to a specific channel of the DAQ device and ultimately acquire data on a desired channel of the NI ELVIS Scope SFP The benchtop workstation also contains a
32. LE signal See also digital I O signal description table 3 10 related documentation 1 5 removing protection board B 1 requirements DAQ hardware 3 1 RESERVED signal description table 3 8 resistor packs location figure B 3 NI ELVIS components table B 4 resource conflicts table D 1 S safety specifications A 9 SCANCLK signal description table 3 8 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 4 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 8 NI ELVIS User Manual Index software mode function generator 3 4 variable power supplies 3 3 specifications analog input A 1 bode analyzer A 2 DC power supplies 5 V supply A 3 15 V supply A 2 DMM current measurement A 4 voltage measurement A 5 electromagnetic compatibility A 9 function generator A 6 oscilloscope A 7 safety A 9 variable power supplies negative supply A 8 positive supply A 7 SUPPLY signal See also variable power supplies connecting analog output signals 3 14 signal description table 3 9 SUPPLY signal See also variable power supplies signal description table 3 9 SYNC OUT signal See also functio
33. LICATION 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 DIFFERS 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 ULTIMA
34. LVIS User Manual
35. Mapping eene eee 3 12 Table 4 1 Counter Signal Correlations eese 4 3 Table B 1 Resistor Packs and NI ELVIS Components esee B 4 NI ELVIS User Manual viii ni com DAQ System Overview The NI ELVIS User Manual contains information that you need to understand and program the NI ELVIS architecture and instruments It also discusses the components of an NI data acquisition DAQ system and the concept of virtual instrumentation This chapter briefly describes the concept of DAQ systems and introduces NI ELVIS a DAQ system designed for educational laboratories 3 Note Refer to the Where to Start with NI ELVIS document for information about how to set up the components of the NI ELVIS 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 can also include the output of analog or digital control signals The building blocks of a DAQ system include the following items e 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 e Signal The p
36. NI Educational Laboratory Virtual Instrumentation Suite NI ELVIS User Manual September 2005 b f NATIONAL 373363C 01 p 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 800 433 3488 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 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 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 1800 226 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 02 2377 2222 Thailand 662 278 6777 United Kingdom 44 0 1635 523545 For further support information refer to the Signal Conditioning Technical Support Information document To comment on National Instruments documentation refer to the National Instruments Web site at ni com info and enter the info code feedback 2003 2005 Nati
37. O digital I O DIO and counter timers le Note You can use M Series DAQ devices with NI ELVIS if you are using NI ELVIS software version 2 0 or later NI ELVIS User Manual 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 available at ni com manuals for specific information about the functionality and operation of the device 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 university laboratories With LabVIEW you can rapidly create applications using intuitive graphical developm
38. Supply Controls e 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 National Instruments Corporation 3 3 NI ELVIS User Manual Chapter 3 Hardware Overview Supply Controls e 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 the NI ELVIS Help Function Generator Controls EI 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 Fine Frequency Knob Adjusts the output frequency of the function ge
39. TELY 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 Conventions lt gt Ei AN AX N bold DAQ device ELVIS italic monospace The following conventions are used in this manual Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name for example AO 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 This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this icon is marked on the product refer to the Read Me First Safety and Radio Frequency Interference document shipped with the product for precautions to take When symbol is marked on a product it denotes a warning advising you to take precautions to avoid electrical shock When symbol is marked on a product it denotes a component that may be hot Touching this component may result in bodily injury Bold text denot
40. TEM rower MANUAL Oo MANUAL O MANUAL O N AMPLITUDE JU D H 50 H kHz VOLTAGE VOLTAGE zur T 250kHz Y 7 INE 500 Hz FREQUENCY 50 Hz COARSE 12 of o 312 FREQUENCY A A A COMMUNICATIONS PROTOTYPING BOARD POWER J A RO D 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 workstation has the following controls and indicators e System Power LED Indicates whether the NI ELVIS is powered on e Prototyping Board Power Switch Controls the power to the prototyping board 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 e Variable Power Supplies Controls KI 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
41. VIS variable power supplies ctr DAQ counter timers do NI ELVIS digital output Figure D 1 Possible Resource Conflicts NI ELVIS User Manual D 2 ni com Common Questions This appendix lists common questions related to the use of the NI ELVIS workstation Which National Instruments data acquisition DAQ devices can I use with NI ELVIS NI ELVIS is designed for use with National Instruments DAQ devices which are high performance multifunction analog digital and timing I O devices The supported functions on DAQ devices include AI AO DIO and TIO To use NI ELVIS the installed DAQ device connected to NI ELVIS must have the following minimum requirements e 16 AI channels s 2 AO channels s SN DIO lines s 2counter timers le Note NI ELVIS does not support 64 AI channel DAQ devices Also the DAQPad 6020E is not supported by NI ELVIS Can I use the NI ELVIS SFP and the NI ELVIS API at the same time No Due to software conflicts you can only use one at a time In order to use the LabVIEW API you must first close the ELVIS SFP When using the current DMM function why are measurements made at the positive side of the circuit less accurate than measurements made on the grounded side The ELVIS DMM has limited common mode rejection capabilities For optimal accuracy make current measurements on the grounded side of the circuit National Instruments Corporation E 1 NI ELVIS User Manual Glossary
42. alyzer 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 Related Documentation The following documents contain information that you might find helpful as you read this manual National Instruments Corporation DAQ device documentation available at ni com manuals Getting Started with LabVIEW available at ni com manuals LabVIEW Help available by selecting Help VI Function and How To Help from the LabVIEW block diagram or front panel LabVIEW Measurements Manual available at ni com manuals Measurement amp Automation Explorer Help for DAQmx available by selecting Help Help Topics NI DAQmx from the Measurement amp Automation Explorer MAX window Where to Start with NI ELVIS available in PDF format on the NI ELVIS Software CD or from ni com manuals NI ELVIS Help available on the NI ELVIS Software CD or from ni com manuals 1 5 NI ELVIS User Manual 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 you can use NI ELVIS in various academic environments Chapter 3 Hardware Overview provides more detailed information about NI ELV
43. ational Instruments Corporation A 7 NI ELVIS User Manual Appendix A Specifications Software controlled resolution 7 bits Current limiting sss sese see eee ee eee eee 0 5 V at 160 mA 5 V at 275 mA 12 V at 450 mA Negative Supply Output voltage eene 0to 12 V Ripple and noise sess 0 2596 Software controlled resolution 7 bits Current limiting eee 0 5 V at 130 mA 5 V at 290mA 12 V at 450mA Physical Dimensions sss eee 31 75 x 30 48 x 12 7 cm 12 5 x 12 0 x 5 in Weight sssissssiissiissnioseressersrrersrrennn 4 08 kg 9 0 1b Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common mode voltage Channel to earth sess x20 V Measurement Category I Channel to channel x20 V Measurement Category I UN Caution Do not use for connection to signals in Categories II III or IV 1 Total current drawn from 15 V and the negative variable power supply cannot exceed 500 mA NI ELVIS User Manual A 8 ni com Appendix A Specifications Environmental Operating temperature 0 to 40 C Storage temperature eee 20 to 70 C Humidity iai 10 to 90 relative humidity noncondensing Maximum altitude sss sss 2 000 m Pollution Degree indoor use only 2 Safety NI ELVIS is designed to meet the requirements of the following standards of safety for electrical equipm
44. ax Amplitude flatness To 30 25 ceret 0 5 dB LO 250 KHz bes 3 dB Frequency modulation Output impedance Impedance Analyzer Measurement frequency range NI ELVIS User Manual A 6 5 of full scale max 50 O guaranteed Refer to Appendix C Theory of Operation for more information about the output impedance configuration options 5 Hz to 35 kHz ni com Appendix A Specifications Oscilloscope Refer to the Analog Input section of the DAQ device specifications documentation ACCUFACy vage eue 12 or 16 bits DAQ device dependent Input impedance sss DAQ device dependent Maximum horizontal resolution DAQ device dependent Range tuse ete date rein 10 V Sampling rate per channel 100 kHz to 500 kHz DAQ device dependent Maximum input bandwidth 10 kHz to 50 kHz DAQ device dependent Vertical resolution sese eee 12 or 16 bits DAQ device dependent Two Wire Current Voltage Analyzer Current range 2 eee 10 mA Voltage sweep range esses 10 V Three Wire Current Voltage Analyzer Minimum base current increment 15 pA Maximum collector current 10 mA Maximum collector voltage 10 V Variable Power Supplies Positive Supply Output voltage sese sese eee 0to 12V Ripple and notze 0 25 This SFP instrument is intended for use only with NPN BJT transistors N
45. ce 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 DAQ Hardware NI ELVIS is designed to interact with National Instruments E M 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 le Note You can use M Series DAQ devices with NI ELVIS if you are using NI ELVIS software version 2 0 or later 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 AI channels minimum sample rate of 200 kS s e Two AO channels e Eight DIO lines e Two counter timers hy Note NI ELVIS also supports 64 AI channel DAQ devices when used with the appropriate cable For cabling information refer to the DAQ device documentation 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
46. com 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 EI 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 manually change the limits 3 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 Voltmeter Signal Path p A B C D NI ELVIS Motherboard Prototyping Protection Board DAQ Device Board oA 7 Oo MUX oAI 15 VOLTAGE HI i i Benchtop Works
47. d provides 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 the Where to Start with NI ELVIS document for more parts locator diagrams of the NI ELVIS Benchtop Workstation 1 NI ELVIS Protection Board 2 NI ELVIS 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 protection board from the benchtop workstation Refer to Figure B 1 as needed 1 Unplug the power cable Refer to the Where to Start with the NI ELVIS document 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 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 AO channe
48. dance 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 Vy These settings allow a focused calibration that reduces resistive and capacitive offset The resistance meter uses four ranges to measure from 50to3 MQ National Instruments Corporation C 11 NI ELVIS User Manual Appendix C Theory of Operation Inductance Meter Capacitance 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 Vy These settings allow a focused calibration that reduces resistive and capacitive offset 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 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 sw
49. directly accessible on the prototyping board However the benchtop workstation contains circuitry that multiplexes the DAQ DIO lines to provide digital input and output National Instruments Corporation 4 7 NI ELVIS User Manual Chapter 4 Programming NI ELVIS Scope NI ELVIS User Manual signals You can control the DIO hardware using the NI ELVIS instrument driver The driver allows you 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 Figure 4 4 Simple Digital 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 in Figure 4 5 Figure 4 5 Simple Digital 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 23 C u
50. e figure describe each section of the figure in more detail Impedance Analyzer Signal Path gt A B C Prototyping Protection Board NI ELVIS Motherboard Board i i Fuses Switch CURRENT HI 1 d o NO oC Benchtop 1 Workstation MERE E Control i 1 i Panel as o Euren MUX o unction l i MEN l Generator OVD Al13 04 CURRENT HI D o i e i DAQ Device Note This CURRENT HI signal routes first to the motherboard and then to the protection board as shown NI ELVIS User Manual Figure C 5 CURRENT HI Block Diagram NI ELVIS Motherboard tThe 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 Figure C 5 provides a resistive element labeled R in Figure C 5 to always insure a minimum resistance CURRENT HI is routed to AI 5 for measurements Because the AI 5 voltage is measured after the onboard 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 C 8 ni com Appendix C Theory of Operation Prototyping Board and Benchtop Workstation Connectors When the NI ELVIS Prototyping Board is powered off
51. e they are located on the prototyping board Table 3 1 Signal Descriptions Signal Name Type Description ACH lt 0 5 gt General AI Analog Input Channels 0 through 5 Positive differential input to the AI channels ACH lt 0 5 gt 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 about 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 connected 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 AI GND PFI 1 2 Programmable Function I O Programmable Function Input PFI 1 through 2 and PFI 5 7 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 Pin 46 connected to the SCANCLK pin of the E Series DAQ device or PFI 10 of M Series DAQ device For more information refer to the
52. eep 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 p A B C NI ELVIS Motherboard Prototyping Board DAQ Device CURRENT HI eme AIR DACO Wb DUT Lk CURRENT LO 0 AI7 NI ELVIS User Manual Figure C 7 Two Wire Measurement Block Diagram C 12 ni com Appendix C Theory of Operation Internal Calculations 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 Law V IxR For R use the NI ELVIS feedback resistor CA Slope and for V use the AI 7 voltage CH7 voltage Measured Current in A
53. eere rea 3 12 DMM tenter E ee 3 13 E eT ee teer rr te Rd e et Ed 3 13 Connecting Analog Output Sienals sese sees eee eee 3 13 Generic Analog Output essere 3 13 DC Power Supplies 2 2 2 te tette tpe dieere Rte 3 13 Function Generator ON 3 14 Variable Power Supplies eese 3 14 Connecting Digital I O Signals sss esse eee 3 14 Connecting Counter Timer Signals esee 3 15 Connecting User Configurable Signals eee 3 15 Chapter 4 Programming NI ELVIS Programming NI ELVIS Using NL DAOmn eene 4 2 Analog Input e eq dee teet ete eee dv erts e ERE den 4 2 Analog Output eer etnia ne bed 4 3 Tiimiig and ControL VO en ee e D ee eere omi 4 3 Programming NI ELVIS Using the NI ELVIS LabVIEW API eee 4 4 Vatiable Power Supplies erret ete eee er eerte 4 5 Function Generator eI eee d deett 4 6 Digital Multim tet eischte deet cete hs 4 7 Digital VO erger eege PERS equipe utei 4 7 SCODE s eie et epe n rete e ut pies 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 Common Questions Glossary Index Figures Figure 1 1 Eypical DA Q System certet eR eres 1 2 Figure 2 1 The NI ELVIS System sse rennen 2 2 Figure 3 1 Control Panel Diagram of the Benchtop Workstation
54. eferenced to a 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 Soft front panel TTL signal of the same frequency of the function generator Timing I O Trigger signal Any event that causes or starts some form of data capture Trigger input signal for the oscilloscope Transistor to transistor logic G 8 ni com VI VOLTAGE V p p W waveform WR_ENABLE Glossary Volt or 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 National Instruments Corporation G 9 NI ELVIS User Manual Index Symbols 5 V 5 V power supply prototyping board power 3 7 specifications A 3 5V signal See also DC power supplies connecting analog output signals 3 13 signal description table 3 9 fuse figure B 3 15 V
55. enchtop workstation 3 5 overview 2 6 resource conflicts overview 3 12 table D 2 signal descriptions table 3 8 specifications A 7 PFI lt 1 2 gt signals signal description table 3 8 PFI lt 5 7 gt signals signal description table 3 8 power supply DC See DC power supply prototyping board 3 7 variable See variable power supplies programmable function I O PFI lt 1 2 gt signals 3 8 PFI lt 5 7 gt signals 3 8 RESERVED signal 3 8 resistor pack B 4 SCANCLK signal 3 8 programming NI ELVIS overview 4 1 using LabVIEW DIO 4 7 DMM 4 7 function generator 4 6 overview 4 4 Scope 4 8 ni com variable power supplies 4 5 using NI DAQmx analog input 4 2 analog output 4 3 overview 4 2 timing and control I O 4 3 protection board debugging B 2 overview 3 5 reinstalling B 4 removing the protection board B 1 theory of operation C 1 prototyping board connecting signals analog input DMM 3 13 generic analog input 3 11 grounding 3 11 oscilloscope 3 13 resource conflicts overview 3 12 table D 2 analog output DC power supplies 3 13 function generator 3 14 generic analog output 3 13 variable power supplies 3 14 counter timer signals 3 15 digital I O 3 14 overview 2 3 3 6 parts locator diagram 3 7 power supply 3 7 switch figure 3 3 signal descriptions table 3 8 theory of operation C 1 National Instruments Corporation I 7 Index R RD ENAB
56. ent 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 classroom to solve purely analytical or numerical problems For more information about programming with LabVIEW refer to Getting Started with LabVIEW and the LabVIEW Measurements Manual available atni 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 system to meet unpredictable needs Research and instructional efforts also require that their systems be
57. ent for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL 61010 1 e CAN CSA C22 2 No 61010 1 le Note For UL and other safety certifications refer to the product label or visit ni com certification search by model number or product line and click the appropriate link in the Certification column Electromagnetic Compatibility IER Te EE EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Imin nity EE EN 61326 1997 A2 2001 Table 1 EMC EMIL ertet esee rro eoo Sec CE C Tick and FCC Part 15 Class A Compliant le Note For EMC compliance operate this device with shielded cabling In addition all covers and filler panels must be installed National Instruments Corporation A 9 NI ELVIS User Manual Appendix A Specifications CE Compliance NI ELVIS 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 EMU 89 336 EEC le 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 10 ni com Protection Board Fuses This appendix describes the fuses on the NI ELVIS Protection Board an
58. ent meter is not adjusted for common mode rejection The common mode rejection of the current meter is determined by the difference amplifier 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 on differential channel seven Current AC Gain x 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 Block Diagram Theory of Operation Figure C 3 shows a basic block d
59. er 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 HI VOLTAGE LO Voltage Read 5 The NI ELVIS software then performs the following calculations Voltage Returned DC Voltage Read Offset x Gain Voltage Returned AC Gain x VAC VDC Voltage Returned is displayed in the NI ELVIS software 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 me
60. es items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names DAQ device refers to any National Instrument DAQ device that meets the conditions listed in the DAQ Hardware section of Chapter 3 Hardware Overview Educational Laboratory Virtual Instrumentation Suite Italic text denotes variables emphasis a cross reference or an introduction to a key concept Italic text 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 Contents Chapter 1 DAQ System Overview Whatis DAQY3T a ote ett ter det e dn T ten e eee 1 1 PAQ Hard Wars ite eee endi iicet epos 1 2 Bab VIEW ae eat eh casa Liste s ove ce vi T 1 3 Virtual Instrumentation sees eere 1 3 UB JA AROUND 1 4 Chapter 2 NI ELVIS Overview NIELVIS Hardware ec et isl ec REPRE NER e REX EAR AVE 2 3 NI ELVIS Benchtop Workstation sss esse eee eee 2 3 NI ELVIS Prototyping Board 2 3 NI ELVIS SOftWAEe terere eege et det eia ee erede Deed eren 2 3 eist et VE een CEET 2 4 Instrument Laune eru s ett ro RR Reed 2 4 Arbitrary Waveform Generator ARD
61. es 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 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 CTR1_OUT CURRENT D D A DAC DAQ dB DC default setting 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 0 gate signal Counter 0 output signal Counter 0 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
62. he NI ELVIS instrument driver which is located in the functions palette under Instrument I O Instrument Drivers NI ELVIS Note If your DAQ device has multiple DIO ports only port 0 is reserved for NI ELVIS You can access the other ports directly This chapter explains how to program the NI ELVIS hardware using NI DAQmx and the NI ELVIS instrument driver This chapter familiarizes you with concepts you should know when programming NI ELVIS For more information about programming with NI DAQmx or LabVIEW refer to the NI DAQmx documentation that shipped with the device or to the LabVIEW Measurements Manual National Instruments Corporation 4 1 NI ELVIS User Manual Chapter 4 Programming NI ELVIS 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 AO and counter timer applications by launching LabVIEW and selecting Find Examples Hardware Input and Output DAQ and then choosing the type of example or you can find examples by selecting Find Examples and then searching for NI ELVIS le 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 UN Caution ACH3 and ACH4 are used for Osc
63. he signal path As long as the signal you are measuring is 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 connected 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 connected to the DAQ device input channels NI ELVIS also has two ground pins AI SENSE and AI GND which are connected to the DAQ device Table 3 2 shows how the NI ELVIS input channels map to the DAQ device input channels National Instruments Corporation 3 11 NI ELVIS User Manual Chapter 3 AN Hardware Overview Table 3 2 Analog Input Signal Mapping NI ELVIS Input Channel DAQ Device Input Channel ACHO0 AIO ACHO0 AL S ACH1 AII ACHI AI9 ACH2 AI 2 ACH2 AI 10 ACH3 AI 3 ACH3 AI 11 ACH4 AI 4
64. heory of operation C 1 using the hardware in bypass mode 3 1 DC power supplies prototyping board power 3 7 signal descriptions table 3 9 specifications 5 V power supply A 3 15 V supply A 2 debugging the protection board B 2 DI lt 0 7 gt signals See also digital UO connecting digital I O signals 3 14 signal description table 3 10 digital bus reader SFP 2 5 digital bus writer SFP 2 5 digital I O connecting signals 3 14 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 9 3 10 software instruments digital bus reader 2 5 digital bus writer SFP 2 5 digital multimeter See DMM NI ELVIS User Manual l 4 DMM connecting signals 3 12 connectors description 3 4 location figure 3 3 internally using the DACs caution 3 13 LabVIEW API 4 7 overview 2 5 resource conflicts table D 2 signal descriptions table 3 8 3 9 specifications current measurement A 4 voltage measurement A 5 theory of operation C 1 DO lt 0 7 gt signals See also digital I O connecting digital I O signals 3 14 signal description table 3 9 documentation conventions used in the manual iv related documentation 1 5 DSA resource conflicts table D 2 SFP overview 2 6 DSUB PIN signals signal description table 3 10 DSUB SHIELD signal signal description table 3 10 dynamic signal analyzer See DSA E electromagne
65. his 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 You can obtain the components on the protection board from electronics vendors and therefore service the protection board without sending it to NI for repairs Refer to Appendix B Protection Board Fuses for more information about replacing the fuses on the NI ELVIS Protection Board National Instruments Corporation 3 5 NI ELVIS User Manual Chapter 3 Hardware Overview NI ELVIS Prototyping Board This section describes the NI ELVIS Prototyping 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 circuits to interact with NI ELVIS The prototyping board exposes all the signal terminals of the NI ELVIS for use through the distribution strips on either side of the breadboard area Each signal has a row and the rows are grouped by function Refer to Figure 3 2 for the parts locator diagram for the prototyping board NI ELVIS User Ma
66. iagram 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 lt A B C Prototyping Protection NI ELVIS Motherboard Board Board i i Fuse Switch FM i i Amplitude XR2206 r r 500 MUX AM i i Control Panel i i Knob i Wave Select FUNC OUT EE 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 current fused resistor 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
67. illoscope 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 Ei Note You must configure the DAQ device for differential AI mode before making connections to the NI ELVIS Benchtop Workstation For information about 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 You can use ACH lt 0 5 gt as normal input channels for any existing DAQ examples or 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 Figure 3 2 Prototyping Board Parts Locator Diagram for an illustration of signal connections on the prototyping board NI ELVIS User Manual 4 2 ni com Analog Output Chapter 4 Programming NI ELVIS Typical AI measurements include buffered continuous acquisitions and finite acquisitions with a star
68. ion 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 Referenced Amplitude Gain Amplitude SES E Signal Amplitude C 10 ni com Appendix C Theory of Operation 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 CA Slope Impedance Z P 2 Gain Amplitude Z is 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 Reactance Zx cos Phase x E Reactance Zx sine Phase x D r 1 Susceptance 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 co TUNE er Inductance Offset 2 xn x Frequency Susceptance Capacitance Offset 2xmx Frequency Capacitance Each inductance and capacitance 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 Impe
69. ions A 1 theory of operation C 1 using the hardware in bypass mode 3 1 I O connectors T O connector descriptions 3 15 location figure 3 7 signal descriptions table 3 8 impedance analyzer resource conflicts table D 2 SFP overview 2 6 theory of operation C 7 installation documentation location 1 1 instrument launcher 2 4 instrumentation virtual 1 3 L LabVIEW NI ELVIS software instruments 2 3 overview 1 3 programming NI ELVIS NI ELVIS User Manual Index 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 UO signal description table 3 9 launcher instrument 2 4 LED lt 0 7 gt signals connecting user configurable I O signals 3 15 signal description table 3 10 manual mode function generator 3 4 variable power supplies 3 3 NI ELVIS components figure 2 2 configuring 2 4 hardware overview 2 3 instrument launcher 2 4 LabVIEW API 2 7 overview 1 4 benchtop workstation 2 3 DAQ hardware 1 2 LabVIEW 1 3 prototyping 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 NI ELVIS User Manual analog output 4 3 overview 4 2 timing and control 4 3 normal mode communications switch 3 1 oscilloscope connectors figure 3 3 connectors on b
70. itry 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 engineering 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 NIELVIS SFP instruments such as the Bode Analyzer offer instructors an opportunity to teach advanced courses in signal analysis and processing Students can 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 installi
71. lation 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 National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies 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 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 APP
72. ls and DMM and 100 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 Ei Note The 15 V 15 V and 5 V lines are protected by self resetting circuitry After the cause of the circuit problem is resolved the circuit resets NI ELVIS User Manual To debug the protection board you need a DMM with an ohmmeter Complete the following steps to debug the protection board 1 Unplug the power cable 2 Remove the protection board assembly from the rest of the NI ELVIS workstation 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 there is continuity across the fuse If all the fuses are operational proceed to the resistor packs 4 Verify that the resistance across each resistor is 100 O 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 failing again Appendix B Protection Board Fuses Caution Before restoring power to the circuit be sure the problem that caused
73. m to shift registers so that the refnum information persists between loops 4 6 ni com Chapter 4 Programming NI ELVIS Refer to the NJ ELVIS Help for more information about the specific VIs in the function generator API 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 You can control the DMM hardware using the NI ELVIS instrument driver The driver allows you to configure the measurement type and read the measurement results A simple application is shown in Figure 4 3 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 The DAQ device name is used 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 wire the refnum to shift registers so that the refnum information persists between loops Refer to the NJ 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
74. mps CASI ope 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 AI 6 and is the source voltage that is swept National Instruments Corporation C 13 NI ELVIS User Manual Appendix C Theory of Operation Three Wire Current Voltage Analyzer Signal Path Dp A B C NI ELVIS Motherboard Prototyping Board DAQ Device l 3 WIRE o Al 6 DAC1 DACO pis LR CURRENT LO o AI 7 LLL ds CURRENT HI o AI5 Figure C 8 Three 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 generated on the 3 WIRE pin is from the DAQ device AO 1 This voltage is read on AI 6 internal to NI ELVIS This voltage is displayed as the Voltage
75. n generator connecting analog output signals 3 14 resistor pack B 4 signal description table 3 9 system power LED figure 3 3 system requirements 3 1 T three wire current voltage analyzer resource conflicts table D 2 SFP overview 2 7 theory of operation C 13 NI ELVIS User Manual l 8 TRIGGER signal See also oscilloscope connecting analog input signals 3 13 signal description table 3 8 two wire current voltage analyzer resource conflicts table D 2 SFP overview 2 7 theory of operation C 12 U user configurable I O BANANA signals 3 9 BNC lt 1 2 gt signals 3 9 BNC lt 1 2 gt signals 3 9 connecting signals 3 15 DSUB pin lt 0 9 gt signals 3 10 DSUB shield 3 10 LED lt 0 7 gt signals 3 10 V variable power supplies calibration utility 2 7 fuses figure B 3 hardware controls description 3 3 figure 3 3 LabVIEW API 4 5 overview 2 7 resource conflicts D 1 signal descriptions table 3 9 specifications negative supply A 8 positive supply A 7 virtual instrumentation 1 3 VOLTAGE HI signal See also DMM connecting analog input signals 3 13 DMM theory of operations C 1 signal description table 3 9 ni com VOLTAGE LO signal See also DMM connecting analog input signals 3 13 DMM theory of operations C 1 signal description table 3 9 W WR_ENABLE signal See also digital I O signal description table 3 9 National Instruments Corporation Index NI E
76. nal Refer to the DAQ device documentation for more information about this signal Connecting User Configurable Signals 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 National Instruments Corporation 3 15 NI ELVIS User Manual Programming NI ELVIS An NI ELVIS measurement system is composed of the NI ELVIS 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 t
77. ncluded in this figure because they do not create any resource conflicts National Instruments Corporation D 1 NI ELVIS User Manual Appendix D Resource Conflicts e 8 o 9 SG o 2 w E c S amp lt 5 v o 2 Z 2 ss 5 ZS g S nz 9 525 sS bE cs zb ZS SZ gd Zei 5 gt x x x c Kk o O o o 7 gt 2 Qg S 4 P 0 o D Si L 90 S GO GA ZE Se S 5 wo 2 zoo 5 5 S C S 2 e g 5 D C9 DE 9 ee CER BER Oe Ee EEC 65 Se 9 Dt 5 amp S E E BENG o o Oo o S mo e e e Se E Sg 30702 c c c9 o oO E QE FS sg OD S FOS lt S Z S 2 D d E J E ZZ T o 2 Do SS BS SS Z Z Z Z o Gi o c c c Q E Q OO coo Z Z Z Z Z Z Z Z o CZ i oc o0 335 0 G BD og 6 0 2 eee Function Generator Base fgifgifg EH Function Generator Ultrafine fg fg fg l fg fg Function Generator Modulated fgifg fg Are fg 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 Conflict Codes aid DAQ Al different channels fg NI ELVIS function generator ais DAQ Al same channels ca NI ELVIS current amplifier ao DAQ AO vdc NI EL
78. nerator For more information about the software controls for the function generator refer to the NI ELVIS Help DMM Connectors UN 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 NI ELVIS User Manual CURRENT Banana Jacks e HI The positive input to all the DMM functionality except measuring voltage e LO The negative input to all the DMM functionality except measuring voltage 3 4 ni com Chapter 3 Hardware Overview VOLTAGE Banana Jacks HI The positive input for voltage measurements LO tThe negative input for voltage measurements i Note The NI ELVIS DMM is ground referenced Oscilloscope Scope Connectors UN 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 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 T
79. ng a thermocouple jack on the prototyping board allows robust thermocouple connections The programmable power supply can provide excitation for strain gauges used in strain measurements NI ELVIS in Biological Sciences VAN 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 multipliers or light detector sensors Students can build high gain low noise circuits on the removable printed circuit board PCB and study 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 devi
80. nless otherwise noted EI 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 esses DC to DAQ device AO update rate 10 Full power bandwidth 27 kHz Output amplitude 10 V Resolution sss sees eee 12 bits or 16 bits DAQ device dependent Output drive current eee 25 mA Output impedance sss ee eee renee 1Q SLEW T l scsi endian kek 1 5 V us 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 esses Phase accuracy eene Frequency range eee DC Power Supplies 15 V Supply Output current eese Output voltage eee Line regulation eene Load regulation sss Ripple and noise sese eee eee 15 V Supply Output current esee Output voltage esee Line regulation eene Load regulation esses Ripple and
81. noise sese eee eee 12 or 16 bits DAQ device dependent degree 5 Hz to 35 kHz Self resetting circuitry not to shut down at or below 500 mA 15 V at 5 no load 0 596 max 1 typ 5 max 0 to full load 196 Self resetting circuitry not to shut down at or below 500 mA 15 V at 5 no load 0 5 max 1 typ 5 max 0 to full load Full load refers to the maximum current output of the power supply Load regulation is linear over 0 to full load therefore at 50 of full load the output drops by 50 of the load regulation specification 2 Total current drawn from 15 V supply and variable power supplies cannot exceed 500 mA NI ELVIS User Manual A 2 ni com 5 V Supply Output current kasia Output voltage eene Line regulation eee Load regulation esse Ripple and noise sese Digital 1 0 Resolution Digital input resolution Digital output resolution Digital addressing sese Digital Input Appendix A Specifications Self resetting circuitry not to shut down at or below 2 A 5 V at 5 no load 0 50 max 22 typ 30 max 0 to full load 1 8 bits 8 bits 4 bits 1 0 LA max 2 0 V min 0 8 V max 3 38 V min at 6 mA 4 4 V min at 20 pA 0 86 V max at 6 mA 0 1 V max at 20 LA Full load refers to the maximum current output of the power supply Load regulation is linear over 0 to full load therefore at 50 of full load the
82. ns The 3 WIRE pin is used for three terminal device measurements in conjunction with the CURRENT HI and CURRENT LO pins UN 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 ACH4 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 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 Caution Other functions of NI ELVIS such as the DMM and FGEN internally use DACO and DAC1 and these functions can potentially interfere with the measurements The driver software generates an error message when there is a potential resource conflict DC Power Supplies The DC power supplies output a static 15 V and 5 V For more information about the DC power supplies output refer to
83. nual 3 6 ni com Chapter 3 Hardware Overview 2 NATIONAL Uo d f NSS INSTRUMENTS PROTOTYPING BOARD nunnn noun goons oooogd nBHnnB nnunn T 0000 99869 zeg fa 9 BHBBB 99669 12000 oar Z Sligo goood Sec oao S go BEER SECHS o of fi30 8 s S pes goooo ooo00 ooooo ooooo Do Digital VO H SIS 99669 poop Su gje 99669 ooooo aile 2 elpo Su Goose ooooo 2E Qo 66969 ooooo Owi gi bot IB B8 BHuBBH BBBBH S H Bagge nonoo B 8 BANANA A zech Selo BIB 59986 s 66856 86 BIR Donon s ooooo G B ss ls OO goooo ooooo Bo Bio nunnu 990090 ofja ous e oe 1 O olo goooo 0068060 ajo oio goooo 880806 DI o Seer eS Su ooooo ooooo ejje ojo 66660 90996 SIS emet ZS Bue mmu ppnen W Du gppon ooooo oje Buzz ws aile HUBER porun ole oe BES paap Slika alla Doan ola 9 8 8 S SS SIS 8 fe e wajo ole mmuun nummus ojjjo oo 89989 ooooo ofja ois asja elle papom Good iio aje ganan goana Bi SI r1 ss oje naonn s Buena fiS S Banen e amoa A Sz SS Dpppp nnnnn ooooo ooooo d mm Pega TTS glija goood BBB efe ale 99689 89966 SIS g fea UR SIS 98906 ooooo Se SIE BEER ooooo SIS Bloe BANANA C vo lo o D HHHHH y HHHHH ajo ojo 0000 y 99096 O i3 8 ronces coun bo H noonoo Geo B E Donon nonono K Hu swa Bue gona Seng ol Bo Spee 58966 of 8 8 Su uum gong Su ojo num ooooo ojja S o
84. 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 for measurements of NPN transistors 3 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 0 V and the positive power supply can output between 0 and 12 V KI Note For a detailed explanation of the SFP instruments and instructions for taking a measurement with each instrument refer to the NJ 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 KI Note For the VI reference for each API refer to the NI ELVIS Help NI ELVIS Calibration Utility The NI ELVIS 2 0 or later software includes a calibration utility that you can use to recalibrate the NI ELVIS variable power supplies or function generator circu
85. onal 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 document is accurate The document has been carefully reviewed for technical accuracy In the event that
86. other pattern is output Output voltage levels of the NI ELVIS DO bus are TTL compatible Digital Multimeter DMM This commonly used instrument can perform the following types of measurements e DC voltage 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 p
87. own 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 involving 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 PN 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
88. pass mode communications switch location figure 3 3 overview 3 3 description 3 2 C calibration utility 2 7 CH A B signals See also oscilloscope connecting analog input signals 3 13 signal description table 3 8 CH lt A B gt signals See also oscilloscope connecting analog input signals 3 13 signal description table 3 8 communications switch location figure 3 3 overview 3 3 purpose 3 1 ni com configuring NI ELVIS 2 4 conflicts resources table D 1 connecting signals on the prototyping board analog input DMM 3 13 generic analog input 3 11 grounding 3 11 oscilloscope 3 13 resource conflicts overview 3 12 table D 2 analog output DC power supplies 3 13 function generator 3 14 generic analog output 3 13 variable power supplies 3 14 counter timer signals 3 15 digital I O 3 14 user configurable signals 3 15 connectors See I O connectors conventions used in the manual iv counter timers connecting signals 3 15 DAQ hardware in bypass mode 3 2 resistor pack B 4 resource conflicts table D 2 CTRO_GATE signal connecting counter timer signals 3 15 counter signal correlations table 4 3 signal description table 3 10 CTRO_OUT signal connecting counter timer signals 3 15 counter signal correlations table 4 3 signal description table 3 10 CTRO_SOURCE signal connecting counter timer signals 3 15 counter signal correlations table 4 3 signal description table 3 10
89. r 1 Output Connected to the GPCTR1_OUT pin on the DAQ device For more information about the GPCTRI OUT signal refer to the DAQ device documentation FREQ OUT Counters Pin 1 Connected to the FREQ OUT pin on the E Series DAQ device For more information 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 PIN lt 1 9 gt User Configurable I O D SUB Pins 1 through 9 Connection to D SUB pins 5 V DC Power Supply 5V Source Output of fixed 5 V power supply referenced to the GROUND signal GROUND DC Power Supply Ground Prototyping board ground These ground pins are connected together The FREQ OUT signal is not available on M Series devices NI ELVIS User Manual 3 10 ni com Chapter 3 Hardware Overview 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 UN Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires Grounding Considerations Because the analog channels are differential you must establish a ground point somewhere in t
90. rammable 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 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 one or both 4 4 ni com Chapter 4 Programming NI ELVIS applications might return incorrect results when a DMM application runs To prevent this problem an error is returned if the driver detects that a resource is in use
91. roduct of the DAQ system transducer e 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 e DAQ hardware Hardware used to acquire measure and analyze data e Software NI application software is designed to help you easily design and program your measurement and control application National Instruments Corporation 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 DAQ Hardware 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 provide more information about DAQ hardware and software which is Lab VIEW in the case of NI ELVIS 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 systems or provide a stimulus so that the DAQ system can measure a response Most DAQ devices have four standard elements analog input AI analog output A
92. rovides 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 adjustment knobs along with a modifiable timebase You can also 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 maximum sampling speed specifications 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
93. t trigger For more information about how to perform an AI acquisition using NI DAQmx refer to the NI DAQmx documentation that shipped with the DAQ device 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 DAC connect to the signals of the same name on the DAQ device You can use these signals as normal output channels for any existing DAQ examples and when you program with DAQ VIs Refer to Figure 3 2 Prototyping Board Parts Locator Diagram 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 Voltage 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 about 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 The NI ELVIS workstation 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 lt 0
94. tation i i Common 1 Control 1 1 Mode Rejection Adjustment Panel VOLTAGE HI K VOLTAGELO Note This VOLTAGE HI and VOLTAGE LO signal routes first to the motherboard and then to the protection board where they are shorted to the signals as shown 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 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 511 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 NI ELVIS User Manual C 2 ni com Current Meter Appendix C Theory of Operation 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 The internal NI ELVIS bus sets the differential channel seven multiplexer to read the voltmet
95. 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 malfunctions or service failures caused by owner s failure to follow the National Instruments instal
96. ter The paragraphs that follow the figure describe each section of the figure in more detail A Prototyping Board O Current Meter Signal Path B Protection Board C D NI ELVIS Motherboard DAQ Device Switches Shunt Diff Amp oco T 0OAI 7 CURRENT LO MUX 1 1 1 CURRENTH 1 1 Benchtop Workstation Control 1 Panel CURRENT HI CURRENT LO le Note This CURRENT HI and CURRENT LO signal routes first to the motherboard and then to the protection board as shown r o 0 Al 15 NI ELVIS User Manual 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 Board 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 C 4 ni com Appendix C Theory of Operation The curr
97. the protection board component to fail has been resolved to keep the same fuse or resistor from If you replace a fuse use a 0 5 A 250 V T 0 5 A L 250V 5 x 20 mm slow blow Littelfuse and rating Cautions For continued protection against fire replace only with fuses of the same type The fuses on NI ELVIS are glass Use care when removing the fuses to prevent injury from broken glass Figure B 2 shows the location of the different fuses and circuit protection circuitry for the NI ELVIS hardware and the location of the resistor packs For Patents ni convpateni 500 mA S B 5X20mm TO 5AL250V AO CURRENT I FRONT PAN re p o VAR PWR SUPPLY 3 dE O CURRENT HI RIS ma OTOTYPING BOA D Bil gr CURRENT LO FRONT PANEL VAR PWR SUPPLY A d E GM A 1 F mer CURRENT LO M 9 95 M EROTOTYPING BOARD 9 ws
98. tic compatibility specifications A 9 ELVIS See NI ELVIS Enable Communications Bypass VI See also communications switch purpose 3 2 ni com F FGEN See function generator FM_IN signal See also function generator connecting analog output signals 3 14 signal description table 3 9 FREQ_OUT signal connecting counter timer signals 3 15 signal description table 3 10 FUNC_OUT signal See also function generator connecting analog output signals 3 14 resistor pack B 4 signal description table 3 9 function generator calibration utility 2 7 connecting signals 3 14 hardware controls description 3 4 controls location figure 3 3 LabVIEW API 4 6 overview 2 6 resource conflicts table D 2 signal descriptions table 3 9 specifications A 6 theory of operation C 5 fuses debugging the protection board B 2 location figure B 3 G GLB_RESET signal See also digital I O signal description table 3 10 GROUND signal See also DC power supplies variable power supplies connecting analog output signals 3 14 signal description table 3 9 National Instruments Corporation l 5 Index H hardware connecting signals 3 11 DAQ definition 1 1 overview 1 2 system requirements 3 1 fuses B 1 B 3 installation documentation 1 1 NI ELVIS components benchtop workstation 3 2 DAQ device 3 1 overview figure 2 2 protection board 3 5 prototyping board 3 6 resource conflicts table D 2 specificat
99. to the switch is lit No communication changes occur unless you use National Instruments Corporation 3 1 NI ELVIS User Manual Chapter 3 Hardware Overview 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 of the Communications switch 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 Unavailable 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 UN Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires NI ELVIS User Manual 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 3 2 ni com Chapter 3 Hardware Overview yN NATIONAL NI ELVIS INSTRUMENTS SYS
100. to zero The DAQ device name is used National Instruments Corporation 4 5 NI ELVIS User Manual Chapter 4 Programming NI ELVIS 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 Function Generator NI ELVIS User Manual The NI ELVIS Benchtop Workstation has a function generator that you can control using the NI ELVIS instrument driver The driver allows you 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 aveform type KS Figure 4 2 Simple Function Generator Application The output of the function generator is set to zero during initialization 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 name is used to identify the DAQ device that is cabled to the NI ELVIS Benchtop Workstation You can configure the advanced features of the function generator the Tuning and AO Modulation controls 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 refnu
101. urable CS gia 35595 s manya 2 Sijs 55996 ganga gips e szama cao ow evo Bille Eug E IE SIS Siss Ld Sees ox o Gl 9o nummo numen oojo 9 8o ooo ooooo SUS SIS M e e iw 8oo8 Ba Hbo 26696 lo E BBBHH ponon 13008 euo 90000 25598 poene oooo0 Donon Geen d sme sememvr comecTons Za pavo Tr Compete este Sup Mr Cpu TIVO OA EE Sp Mere man ee o E Sege ERE rto mA DIO Signal Rows LED Array D SUB Connector OD E G M 1 Al Oscilloscope and Programmable 6 DMM AO Function Generator Function I O Signal Rows User Configurable I O Variable Power Supplies Counter Timer User Configurable I O 9 Banana Jack Connectors and DC Power Supply Signal Rows and DC Power Supplies Signal Rows 7 Power LEDs 8 BNC Connectors 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 National Instruments Corporation 3 7 NI ELVIS User Manual 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 wher

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