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Glossary
Symbol
p n
μ m k
Prefix
pico nano micro milli kilo
Value
10 –12
10 –9
10 – 6
10 –3
10
3
Numbers/Symbols
/
%
°
Ω
+5 V (signal) percent per degrees ohms
+5 VDC source signal
A
A absolute accuracy
AC
ADE
AI HOLD COMP,
AI HOLD amperes the maximum difference between the measured value from a data acquisition device and the true voltage applied to the input, typically specified as ± voltage alternating current application development environment such as LabVIEW,
LabWindows/CVI, Visual Basic 6, C, and C++ scan clock signal used to increment to the next channel after each
E/M Series DAQ device analog-to-digital conversion
© National Instruments
G-1
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Table of contents
- 2 Worldwide Technical Support and Product Information
- 2 Worldwide Offices
- 2 National Instruments Corporate Headquarters
- 3 Warranty
- 3 Copyright
- 3 End-User License Agreements and Third-Party Legal Notices
- 3 Trademarks
- 3 Patents
- 3 Export Compliance Information
- 3 WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS
- 10 What You Need to Get Started
- 11 National Instruments Documentation
- 13 Electromagnetic Compatibility Guidelines
- 13 Installing Application Software, NI-DAQ, and the DAQ Device
- 13 Installing the SCXI-1540 Module into the SCXI Chassis
- 14 Connecting the SCXI-1540 in an SCXI Chassis to an E/M Series DAQ Device for Multiplexed Scanning
- 14 Connecting the SCXI-1540 in a PXI/SCXI Combination Chassis to an E/M Series DAQ Device for Multiplexed Scanning
- 14 Verifying the SCXI-1540 Installation in Software
- 14 Installing SCXI Using NI-DAQmx in Software
- 14 Manually Adding Modules in NI-DAQmx
- 14 Installing SCXI Using Traditional NI-DAQ (Legacy) in Software
- 15 Manually Adding Modules in Traditional NI-DAQ (Legacy)
- 15 Verifying and Self-Testing the Installation
- 15 Troubleshooting the Self-Test Verification
- 15 Troubleshooting in NI-DAQmx
- 17 Troubleshooting in Traditional NI-DAQ (Legacy)
- 18 Connecting to LVDTs and RVDTs
- 18 Figure 2-1. 4-Wire Connection to an LVDT or RVDT
- 19 Figure 2-2. 5-Wire Connection to an LVDT or RVDT
- 20 Synchronizing Channels
- 20 Figure 2-3. Multiple Channel Synchronization
- 21 Connecting to Resolvers
- 21 Figure 2-4. Resolver Connection
- 22 Pin Assignment
- 23 Table 2-1. Front Signal Pin Assignments
- 24 Rear Signal Connector
- 25 Table 2-2. Rear Signal Pin Assignments
- 26 Common Software-Configurable Settings
- 26 Gain/Input Range
- 27 Excitation Level
- 27 Excitation Frequency
- 27 Excitation Source
- 27 Wire Mode
- 27 External Synchronization
- 28 Configurable Settings in MAX
- 28 NI-DAQmx
- 29 Creating an LVDT/RVDT Global Channel or Task in NI-DAQmx
- 30 Traditional NI-DAQ (Legacy)
- 30 Configuring Module Property Pages
- 31 Creating an LVDT/RVDT Virtual Channel
- 32 Verifying the Signal
- 32 Verifying the Signal in NI-DAQmx Using a Task or Global Channel
- 33 Verifying the Signal in Traditional NI-DAQ (Legacy)
- 33 Verifying the Signal Using Channel Strings
- 34 Verifying the Signal Using LVDT/RVDT Virtual Channel
- 35 LVDTs, RVDTs, and Resolvers
- 35 Figure 4-1. Cut-Away View of an LVDT
- 37 Figure 4-2. LVDT Core Locations with Resulting Induced Voltage and Phase
- 38 SCXI-1540 Theory of Operation
- 39 Figure 4-3. SCXI-1540 Block Diagram
- 40 Modes of Operation
- 40 Theory of Multiplexed Mode Operation
- 42 Scaling LVDT and RVDT Data Using the SCXI-1540
- 42 Converting Resolver Data to Angular Position
- 43 Theory of Parallel Mode Operation
- 44 Developing Your Application in NI-DAQmx
- 44 Typical Program Flowchart
- 45 Figure 5-1. Typical Program Flowchart for LVDT or RVDT Channels
- 46 Figure 5-2. Typical Program Flowchart for Resolver Channels
- 47 General Discussion of Typical Flowchart
- 47 Creating a Task Using DAQ Assistant or Programmatically
- 47 Adjusting Timing and Triggering
- 48 Configuring Channel Properties
- 48 Table 5-1. NI-DAQmx Properties
- 50 Acquiring, Analyzing, and Presenting
- 50 Completing the Application
- 50 Developing an Application Using LabVIEW
- 51 Table 5-2. Programming a Task in LabVIEW
- 52 Using a DAQmx Channel Property Node in LabVIEW
- 53 Figure 5-3. LabVIEW Channel Property Node with AC Excitation at 1 Volt RMS and AC Excit Frequency at 2500 Hz
- 53 Specifying Channel Strings in NI-DAQmx
- 54 Text Based ADEs
- 57 Programmable NI-DAQmx Properties
- 57 Developing Your Application in Traditional NI-DAQ (Legacy)
- 57 Traditional NI-DAQ (Legacy) in LabVIEW
- 59 Typical Program Flow
- 59 Figure 5-4. Typical SCXI-1540 Program Flow with Traditional NI-DAQ (Legacy)
- 60 Configure the SCXI-1540 Settings Using Traditional NI-DAQ (Legacy) in LabVIEW
- 60 Table 5-3. Settings for Configuring the SCXI-1540 Through the AI Parameter
- 61 Figure 5-5. Using the AI Parameter VI to Set Up the SCXI-1540
- 62 Configure, Start Acquisition, and Take Readings Using Traditional NI-DAQ (Legacy) in LabVIEW
- 62 Analyze and Display Using Traditional NI-DAQ (Legacy) in LabVIEW
- 62 Traditional NI-DAQ (Legacy) in Text-Based ADEs
- 63 Configuring System Settings Using Traditional NI-DAQ (Legacy) C API
- 64 Table 5-4. Configuration Functions
- 65 Configure Module Settings Using Traditional NI-DAQ (Legacy) C API
- 65 Table 5-5. NI-DAQ Functions Used to Configure SCXI-1540
- 66 Perform Acquisition Using Traditional NI-DAQ (Legacy) C API
- 66 Perform Scaling, Analysis, and Display
- 67 Other Application Documentation and Material
- 67 Using Software for Multiplexed Scanning
- 67 LabVIEW and the SCXI Channel String
- 69 LabVIEW and the Virtual Channel String
- 69 Performing a Multiplexed Scan
- 70 C and Low-Level DAQ Functions
- 70 Table 5-6. NI-DAQ Functions Used to Configure SCXI-1540
- 71 Traditional NI-DAQ (Legacy) CVI Examples
- 71 Traditional NI-DAQ (Legacy) Measurement Studio Examples
- 71 Calibration
- 71 Calibration Procedures
- 72 Calibration Using LabVIEW or a C-Based ADE
- 73 Table A-1. Input Range, Gain, and Required E/M Series DAQ Device Input Limits
- 76 Table A-2. Absolute System Accuracy
- 77 Figure A-1. SCXI-1540 Dimensions
- 85 Figure C-1. Removing the SCXI-1540
- 87 Table D-1. Digital Signals on the SCXI-1540
- 90 Numbers/Symbols
- 90 A
- 91 C-E
- 92 G-L
- 93 M-O
- 94 P-S
- 95 T
- 96 V-W
- 97 A-F
- 98 G-N
- 99 P-S
- 100 T-W