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11

NI myDAQ User Guide and Specifications

Figure 5 shows the DMM connections on the NI myDAQ. Table 2
describes these signals.

Caution

60 VDC/20 Vrms maximum.

Do not

plug digital multimeter probes into circuits

with Hazardous Voltages, such as wall outlets.

Figure 5.

Connections for DMM Measurements

Connecting Analog Input Signals

When configuring the input channels and making signal connections,
you must first determine whether the signal sources are floating or ground
referenced. The following sections describe these two signal types.

Ground-Referenced Signal Sources

A ground-referenced signal source is connected to the building system
ground, so it is already connected to a common ground point with respect
to the NI myDAQ device, assuming that the computer is plugged into the
same power system. Instruments or devices with nonisolated outputs that
plug into the building power system are ground-referenced signal sources.

1

Connectors for Voltage/Resistance/Diode/Continuity

2

Connectors for Current

Table 2.

DMM Signal Descriptions

Signal Name

Reference

Direction

Description

HI (V



)

COM

Input

Positive terminal for voltage, resistance,
and diode measurements

COM

—

—

Reference for all DMM measurements

HI (A)

COM

Input

Positive terminal for current measurements
(Fused: F 1.25 A 250 V Fast-Acting)

1

2

«
...
9
10
11
12
13
...
»

Содержание myDAQ 195509D-01L

Страница 1: ...ents to measure and analyze real world signals NI myDAQ is ideal for exploring electronics and taking sensor measurements Combined with NI LabVIEW on the PC students can analyze and process acquired signals and control simple processes anytime anywhere Contents Conventions 3 Safety Information 3 Electromagnetic Compatibility Guidelines 3 ni com manuals Deutsch Français NI myDAQ ...

Страница 2: ...18 NI ELVISmx Instrument Launcher 19 Digital Multimeter DMM 20 Oscilloscope Scope 21 Function Generator FGEN 22 Bode Analyzer 23 Dynamic Signal Analyzer DSA 24 Arbitrary Waveform Generator ARB 25 Digital Reader 26 Digital Writer 27 Example Measuring a Signal Using the NI ELVISmx Oscilloscope SFP with NI myDAQ 28 Using NI myDAQ with LabVIEW 29 NI ELVISmx Express VIs in LabVIEW 29 Example Measuring ...

Страница 3: ...amaged return it to National Instruments for repair Clean the hardware with a soft nonmetallic brush Make sure that the hardware is completely dry and free from contaminants before returning it to service Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC as stated in the product specificat...

Страница 4: ...DIO audio power supplies and digital multimeter DMM functions in a compact USB device Tip The Common Terms and Acronyms section has a list of acronyms and terms that you will see in this manual and in many engineering and measurement documents and websites Integrated circuits supplied by Texas Instruments form the power and analog I O subsystems of NI myDAQ Figure 2 depicts the arrangement and fun...

Страница 5: ...aveform acquisition Analog inputs are used in the NI ELVISmx Oscilloscope Dynamic Signal Analyzer and Bode Analyzer instruments Note NI myDAQ components may be changed or substituted without notice Protection Circuit CSD25302Q2 DC DC Isolation Transformer LDO Regulator TPS76433 LDO Regulator TPS76433 VBUS Isolated 3 3 V 15 V 3 3 V 1 2 V 5 V 15 V USB STC3 Digital Isolator ISO7241 DMM Shift Register...

Страница 6: ...terface PFI meaning that it can be configured as a general purpose software timed digital input or output or it can act as a special function input or output for a digital counter Refer to Digital I O DIO and Counters Timers section for more information about the counter on NI myDAQ Note The digital I O lines are 3 3 V LVTTL and are tolerant to 5 V inputs The digital output is not compatible with ...

Страница 7: ...are instruments to control the NI myDAQ device providing the functionality of a suite of common laboratory instruments Refer to the Using NI myDAQ with Soft Front Panel SFP Instruments section for information on the NI ELVISmx suite of measurement instruments NI ELVISmx is located on your driver software installation media included in the NI myDAQ kit or can be found by searching for ELVISmx on th...

Страница 8: ...ting started with NI myDAQ is a simple process but it is important to ensure that you install the right components in the correct order To get started with your NI myDAQ complete the following steps 1 Install the NI myDAQ Software Suite from the DVD shipped with your device The NI myDAQ Software Suite installs application software NI LabVIEW NI Multisim first and then installs the NI ELVISmx drive...

Страница 9: ...minal connector aligned evenly to the NI myDAQ Inserting the screw terminal connector at an angle to the NI myDAQ may cause damage to the connector The screw terminal connector must snap securely into place to ensure proper signal connection Figure 3 NI myDAQ Connection Diagram 1 NI myDAQ 2 USB Cable 3 LED 4 20 Position Screw Terminal Connector 5 Audio Cable 6 DMM Banana Cable 1 2 6 5 3 4 NI myDAQ...

Страница 10: ...al Signal Descriptions Signal Name Reference Direction Description AUDIO IN Input Audio Input Left and right audio inputs on a stereo connector AUDIO OUT Output Audio Output Left and right audio outputs on a stereo connector 15V 15V AGND Output 15 V 15 V power supplies AGND Analog Ground Reference terminal for AI AO 15 V and 15 V AO 0 AO 1 AGND Output Analog Output Channels 0 and 1 AI 0 AI 0 AI 1 ...

Страница 11: ... types Ground Referenced Signal Sources A ground referenced signal source is connected to the building system ground so it is already connected to a common ground point with respect to the NI myDAQ device assuming that the computer is plugged into the same power system Instruments or devices with nonisolated outputs that plug into the building power system are ground referenced signal sources 1 Co...

Страница 12: ...ing Signal Sources A floating signal source is not connected to the same ground reference as NI myDAQ but instead has an isolated reference point Some examples of floating signal sources are battery powered devices outputs of transformers thermocouples optical isolator outputs and isolation amplifiers An instrument or device that has an isolated output is a floating signal source You must connect ...

Страница 13: ...ce impedance The resistor puts the signal path nearly in balance so that about the same amount of noise couples onto both connections yielding better rejection of electrostatically coupled noise This configuration does not load down the source Figure 8 Differential Connections for Floating Signal Sources with a Single Resistor You can fully balance the signal path by connecting another resistor of...

Страница 14: ...iously described using the same value resistor on both the positive and negative inputs NI myDAQ DMM Fuse Replacement NI myDAQ has a fuse to protect the device from overcurrent through HI A current measurement input on the DMM If the DMM soft front panel SFP always reads 0 A current the cause may be a blown fuse Testing Your Fuse To test for a blown fuse complete the following steps 1 Using a bana...

Страница 15: ...er 02161 25 at www littelfuse com To replace a broken fuse complete the following steps 1 Power down the device by properly disconnecting it from the PC and removing the USB cable 2 Remove the screw terminal connector and all other signal cables from the device 3 Loosen the four Phillips screws that attach the bottom of the enclosure to the device and remove the top lid of the enclosure ...

Страница 16: ...NI myDAQ enclosure 4 Replace the broken fuse while referring to Figure 10 for the fuselocation taking care to not damage any components on the board Figure 10 NI myDAQ Fuse Location 5 Replace the lid and screws 1 Enclosure Screws 2 Internal Fuse 1 25 A Fast Acting Littelfuse Part Number 02161 25 1 2 1 NI myDAQ ...

Страница 17: ... A Z and B correspond to DIO 0 DIO 1 and DIO 2 respectively In some instances the software may refer to the output lines as PFI as opposed to DIO Refer to Table 3 for a list of the corresponding counter timer signals assignments through the DIO terminals For more information about event timing requirements refer to the Specifications section For more detailed information on using counter timers wi...

Страница 18: ...rectly modify the executable files but you can modify or enhance the functionality of these instruments by modifying the LabVIEW code which installs in the following location Windows XP 2000 C Documents and Settings All Users Shared Documents National Instruments NI ELVISmx Source Code Windows 7 Vista C Users Public Documents National Instruments NI ELVISmx Source Code Note For a detailed explanat...

Страница 19: ...ument Launcher This opens the suite of LabVIEW SFP instruments Figure 11 NI ELVISmx Instrument Launcher To launch an instrument click the button corresponding to the desired instrument Select the NI myDAQ device from the Device control Some instruments perform similar operations using the same resources of the NI myDAQ hardware and therefore cannot run at the same time If you launch two instrument...

Страница 20: ... and AC Resistance measurement Diode test Audible continuity test Make connections for measurements to the DMM banana jacks on the device This instrument has the following measurement parameters DC voltage 60 V 20 V 2 V and 200 mV ranges AC voltage 20 V 2 V and 200 mV ranges DC current 1 A 200 mA and 20 mA ranges AC current 1 A 200 mA and 20 mA ranges Resistance 20 M 2 M 200 k 20 k 2 k and 200 ran...

Страница 21: ... measurements This instrument has the following measurement parameters Channel Source Channels AI 0 and AI 1 AudioInput Left and AudioInput Right You can use AI channels or AudioInput channels but not a combination of both Coupling AI Channels support DC Coupling only AudioInput Channels support AC Coupling only Scale Volts Div AI channels 5 V 2 V 1 V 500 mV 200 mV 100 mV 50 mV 20 mV 10 mV and for...

Страница 22: ...e or triangle amplitude selection and frequency settings In addition the instrument offers DC offset setting frequency sweep capabilities and amplitude and frequency modulation The FGEN uses AO 0 or AO 1 on the screw terminal connector This instrument has the following measurement parameters Output channel AO 0 or AO 1 Frequency range 0 2 Hz to 20 kHz Figure 14 NI ELVISmx Function Generator SFP ...

Страница 23: ... choose between linear and logarithmic display scales You can also invert the measured values of the input signal during Bode analysis by inverting the Op Amp signal polarity Refer to the NI ELVISmx Help for required hardware connections To access this help file go to Start All Programs National Instruments NI ELVISmx for NI ELVIS NI myDAQ NI ELVISmx Help This instrument has the following measurem...

Страница 24: ...rm measurement It can either continuously make measurements or make a single scan You can also apply various window and filtering options to the signal This instrument has the following measurement parameters Source Channel AI 0 and AI 1 AudioInput Left and AudioInput Right Voltage Range For AI channels 10 V 2 V For AudioInput channels 2 V Figure 16 NI ELVISmx Dynamic Signal Analyzer SFP ...

Страница 25: ...erate stored waveforms Refer to the NI ELVISmx Help for more information about the Waveform Editor To access this help file go to Start All Programs National Instruments NI ELVISmx for NI ELVIS NI myDAQ NI ELVISmx Help Since the device has two AO and two AudioOutput channels two waveforms may be simultaneously generated You can choose to run continuously or run once This instrument has the followi...

Страница 26: ...he NI myDAQ digital lines NI ELVISmx Digital Reader groups the I O lines into ports through which data can be read You can read one port at a time either continuously or as a single reading The lines are grouped into two ports of four pins 0 3 and 4 7 or one port of eight pins 0 7 Figure 18 NI ELVISmx Digital Reader SFP ...

Страница 27: ...tern 0 3 or 4 7 or an 8 bit pattern 0 7 You can also manually create a pattern or select predefined patterns such as ramp toggle or walking 1s This instrument can control a port of four or eight consecutive lines and either continually output a pattern or just perform a single write The output of the NI ELVISmx Digital Writer SFP stays latched until either another pattern is generated the lines it...

Страница 28: ...d is ready to use After the NI myDAQ is connected to the system the blue LED lights indicating the device is ready for use 1 Connect the signal s you want to measure to the connector s on the side of the NI myDAQ device 2 Launch the NI ELVISmx Scope SFP from the NI ELVISmx Instrument Launcher 3 Click Run You should see the signal in the Display Window 4 If necessary adjust the controls to stabiliz...

Страница 29: ... settings for each instrument This enables you to develop LabVIEW applications without extensive programming expertise To access the NI ELVISmx Express VIs open a LabVIEW block diagram and select Measurement I O NI ELVISmx from the function palette Table 4 shows the available NI ELVISmx Express VIs Refer to the NI ELVISmx Help for more information To access this help file go to Start All Programs ...

Страница 30: ...palette 4 Select the NI ELVISmx Oscilloscope Express VI from the VI palette and place it on the block diagram The NI ELVISmx Oscilloscope configuration window opens 5 Connect the signal s you want to measure to the connector s on the side of the NI myDAQ device 6 On the Configuration tab of the configuration window select to measure Channel 0 Channel 1 or both Select the Channel 0 Enable checkbox ...

Страница 31: ...0 output terminal and select Create Graph Indicator from the menu This creates a Graph Indicator on the VI front panel to display the signal data Repeat this step for Channel 1 if you configured the NI ELVISmx Oscilloscope Express VI to enable Channel 1 10 Click the Run button to begin acquiring the measurement You should see the signal s in the graphs on the VI front panel ...

Страница 32: ...ring Audio Pass Through in LabVIEW with NI myDAQ This example covers the simultaneous acquisition of input signals and generation of output signals using the DAQ Assistant in LabVIEW This example forms the foundation for audio signal processing experimentation 1 Launch LabVIEW 2 In the Getting Started window click Blank VI A blank VI opens Select Window Show Block Diagram to open the VI block diag...

Страница 33: ... the Signal Input Range pane Repeat this step for voltage channel 1 if you configured the task for two channels 9 Under Timing Settings set Acquisition Mode to Continuous Samples Enter 5000 in Samples to Read and 40000 in Rate Hz 10 Click OK to exit the DAQ Assistant configuration front panel The VI builds Click No on the Confirm Auto Loop Creation dialog box that displays 11 Place another DAQ Ass...

Страница 34: ...voltage channel 0 by selecting VoltageOut_0 in the Channel Settings pane and setting Max to 2 and Min to 2 in the Signal Output Range pane Repeat this step for voltage channel 1 if you configured the task for two channels 16 Under Timing Settings set Generation Mode to Continuous Samples 17 Click OK to exit the DAQ Assistant configuration front panel The VI builds Click No on the Confirm Auto Loop...

Страница 35: ...ght clicking the STOP button and selecting Create Control 21 Click the run button to test your LabVIEW application 22 Attach a music player to the AUDIO IN 3 5 mm jack and connect speakers to the AUDIO OUT jack You should hear the music on the speakers If you do not hear sound test the speakers on the music player to make sure there is sound playing and that the speakers are functioning properly T...

Страница 36: ...reo audio input ADC resolution 16 bits Maximum sampling rate 200 kS s Timing accuracy 100 ppm of sample rate Timing resolution 10 ns Range Analog input 10 V 2 V DC coupled Audio input 2 V AC coupled Passband 3 dB Analog input DC to 400 kHz Audio input 1 5 Hz to 400 kHz Connector type Analog input Screw terminals Audio input 3 5 mm stereo jack Input type audio input Line in or microphone Microphone...

Страница 37: ...e 22 Settling Time 2 V Range versus Different Source Impedance 200 0 25 0 25 0 5 0 75 1 1 25 1 5 1 75 2 2 25 2 25 3 3 25 3 5 3 75 4 0 180 160 140 120 Sample Rate kHz Settling Error 100 80 60 40 2 25 2 kΩ 5 kΩ 10 kΩ 200 0 2 0 2 0 4 0 6 0 8 1 1 2 1 4 1 6 1 8 2 2 2 2 4 2 6 2 8 0 180 160 140 120 Sample Rate kHz Settling Error 100 80 60 40 2 kΩ 5 kΩ 10 kΩ ...

Страница 38: ...otection AI or AI to AGND 16 V Overvoltage protection audio input left and right None Analog Output Number of channels 2 ground referenced or 1 stereo audio output DAC resolution 16 bits Maximum update rate 200 kS s Range Analog output 10 V 2 V DC coupled Audio output 2 V AC coupled Maximum output current analog output 1 2 mA 1 The total power available for the power supplies analog outputs and di...

Страница 39: ...ng accuracy 100 ppm of sample rate Timing resolution 10 ns Overdrive protection 16 V to AGND Maximum power on voltage1 110 mV Output FIFO size 8 191 samples shared among channels used Digital I O Number of lines 8 DIO 0 7 Direction control Each line individually programmable as input or output Update mode Software timed Nominal Range Typical at 23 C mV Maximum 18 to 28 C mV Positive Full Scale Neg...

Страница 40: ...outed through DIO 1 CTR 0 AUX PFI 2 routed through DIO 2 CTR 0 OUT PFI 3 routed through DIO 3 FREQ OUT PFI 4 routed through DIO 4 Data transfers Programmed I O Update mode Software timed Digital Multimeter Functions2 DC voltage AC voltage DC current AC current resistance diode continuity Isolation level 60 VDC 20 Vrms Measurement Category I 1 The total power available for the power supplies analog...

Страница 41: ...00 mVrms 2 Vrms 20 Vrms Note All AC voltage accuracy specifications apply to signal amplitudes greater than 5 of range Accuracy Input impedance 10 M Function Range Resolution Accuracy of Reading Offset DC Volts 200 0 mV 0 1 mV 0 5 0 2 mV 2 000 V 0 001 V 0 5 2 mV 20 00 V 0 01 V 0 5 20 mV 60 0 V 0 1 V 0 5 200 mV 40 to 400 Hz 400 to 2 000 Hz AC Volts 200 0 mV 0 1 mV 1 4 0 6 mV 2 000 V 0 001 V 1 4 0 0...

Страница 42: ...thin the 1 A range apply to signal amplitudes greater than 10 of range Accuracy Input protection Internal ceramic fuse 1 25 A 250 V fast acting 5 20 mm F 1 25A H 250V Littelfuse part number 02161 25 Function Range Resolution Accuracy of Reading Offset DC Amps 20 00 mA 0 01 mA 0 5 0 03 mA 200 0 mA 0 1 mA 0 5 0 3 mA 1 000 A 0 001 A 0 5 3 mA 40 to 400 Hz 400 to 2 000 Hz AC Amps 20 00 mA 0 01 mA 1 4 0...

Страница 43: ...oltage with no load 15 3 V Minimum voltage with full load 14 0 V Maximum output current1 32 mA Maximum load capacitance 470 F Function Range Resolution Accuracy of Reading Offset 200 0 0 1 0 8 0 3 2 000 k 0 001 k 0 8 3 20 00 k 0 01 k 0 8 30 200 0 k 0 1 k 0 8 300 2 000 M 0 001 M 0 8 3 k 20 00 M 0 01 M 1 5 50 k Exclusive of lead wire resistance 1 The total power available for the power supplies anal...

Страница 44: ...d capacitance 33 F Communication Bus interface USB 2 0 Hi Speed Physical Characteristics Dimensions without screw terminal connector NI myDAQ device part number 195509D 01L and earlier 14 6 cm 8 7 cm 2 2 cm 5 75 in 3 43 in 0 87 in NI myDAQ device part number 195509E 01L and later 13 6 cm 8 8 cm 2 4 cm 5 36 in 3 48 in 0 95 in 1 The total power available for the power supplies analog outputs and dig...

Страница 45: ... humidity IEC 60068 2 56 10 to 90 RH noncondensing Storage humidity IEC 60068 2 56 10 to 90 RH noncondensing Maximum altitude 2 000 m at 25 C ambient temperature Pollution Degree IEC 60664 2 Safety Safety Voltages Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage MAINS is a hazardous live elect...

Страница 46: ...nt for measurement control and laboratory use EN 61326 1 IEC 61326 1 Class B emissions Basic immunity EN 55011 CISPR 11 Group 1 Class B emissions AS NZS CISPR 11 Group 1 Class B emissions FCC 47 CFR Part 15B Class B emissions ICES 001 Class B emissions Note For EMC declarations and certifications refer to the Online Product Certification section CE Compliance This product meets the essential requi...

Страница 47: ...e products must be disposed of separately from municipal household waste according to Directive 2002 96 EC of the European Parliament and the Council on waste electrical and electronic equipment WEEE All products at the end of their life cycle must be sent to a WEEE collection and recycling center Proper WEEE disposal reduces environmental impact and the risk to human health due to potentially haz...

Страница 48: ...007 The TPS6200x devices are a family of low noise synchronous step down DC DC converter that is ideally suited for systems powered from a one cell Li ion battery or from a two to three cell NiCd NiMH or alkaline battery Regulator TPS62003 LDO Regulator TPS71501 These are low dropout LDO voltage regulators offering the benefits of low noise low dropout voltage low power operation and miniaturized ...

Страница 49: ...es a fast 6 s response time and 1 2 A max nanopower capability allowing operation from 1 8 V 5 5 V Operational Amplifier TLE2082 This is an operational amplifier more than double the bandwidth and triple the slew rate of the TL07x and TL08x families of BiFET operational amplifiers Operational Amplifier OPA1642 This is a JFET input ultra low distortion low noise operational amplifier fully specifie...

Страница 50: ...ght encounter if you run certain NI myDAQ circuitry simultaneously To use the information in Table 6 find the instrument you want to use in the left column That row lists all the functions that are resource conflicts If the intersecting box contains an you can use those functions simultaneously without any conflicts ...

Страница 51: ... myDAQ Resource Conflicts DMM Scope AI Scope Audio FGEN Bode DSA AI DSA Audio Arb AO Arb Audio DI 4 Lines DI 8 Lines DO 4 Lines DO 8 Lines DMM Scope AI Scope Audio FGEN Bode DSA AI DSA Audio Arb AO Arb Audio DI 4 Lines DI 8 Lines DO 4 Lines DO 8 Lines No resource conflict Conflict exists ...

Страница 52: ...vironment and the basic LabVIEW features you use to build data acquisition and instrument control applications This document contains exercises that you can use to learn how to develop basic applications in LabVIEW Multisim Getting Started with NI Circuit Design Suite Follow the tutorial in Chapter 2 of this manual to familiarize yourself with the basics of Multisim Multisim Help File This help fi...

Страница 53: ...hat converts analog signals into digital data AI AO Analog input analog output A continuous signal that conveys data from physical phenomena such as temperature strain pressure sound or light DAC Digital to analog converter Device that converts digital code into analog signals DAQ Data acquisition Measuring an electrical or physical phenomenon such as voltage current or temperature using a combina...

Страница 54: ...sers in the EU Based on your statutory rights National Instruments will through its distributor cure defects in materials and workmanship within two years from delivery For support visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date distributor contact information Where to Go for Support The National Instruments Web site is your com...

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