National Instruments Module SCXI-1125 Manual de usuario Pagina 6
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Contents
SCXI-1125 User Manual vi ni.com
Chapter 3
Configuring and Testing
SCXI-1125 Software-Configurable Settings ................................................................. 3-1
Common Software-Configurable Settings ...................................................... 3-1
Filter Bandwidth ............................................................................... 3-1
Gain/Input Range.............................................................................. 3-1
Connecting the SCXI-1125 in an SCXI Chassis
to an E/M Series DAQ Device for Multiplexed Scanning........................... 3-2
Connecting the SCXI-1125 in a PXI/SCXI Combination Chassis
to an E/M Series DAQ Device for Multiplexed Scanning........................... 3-2
Configurable Settings in MAX...................................................................................... 3-2
NI-DAQmx ..................................................................................................... 3-3
Creating a Voltage Global Channel or Task..................................... 3-3
Traditional NI-DAQ (Legacy) ........................................................................ 3-4
Configuring Module Property Pages
in Traditional NI-DAQ (Legacy)................................................... 3-5
Creating a Virtual Channel ............................................................... 3-6
Verifying the Signal ...................................................................................................... 3-6
Verifying the Signal in NI-DAQmx Using a Task or Global Channel........... 3-6
Verifying the Signal in Traditional NI-DAQ (Legacy) .................................. 3-7
Verifying the Signal Using Channel Strings .................................... 3-7
Verifying the Signal Using Virtual Channel .................................... 3-8
Chapter 4
Theory of Operation
Gain ............................................................................................................................... 4-1
Filter Bandwidth and Cutoff Frequency........................................................................ 4-2
Operating in Multiplexed Mode .................................................................................... 4-2
Multiplexed Hardware Operation Theory....................................................... 4-3
Operating in Parallel Mode ........................................................................................... 4-3
Theory of Parallel Hardware Operation.......................................................... 4-4
Chapter 5
Using the SCXI-1125
Temperature Measurements Using Thermocouples...................................................... 5-1
Making High-Voltage Measurements ........................................................................... 5-4
Developing Your Application in NI-DAQmx............................................................... 5-5
Typical Program Flowchart ............................................................................ 5-5
General Discussion of Typical Flowchart....................................................... 5-7
Creating a Task Using DAQ Assistant or Programmatically ........... 5-7
Adjusting Timing and Triggering..................................................... 5-7
- SCXI-1125 User Manual 1
- Important Information 3
- Conventions 4
- Contents 5
- About the SCXI-1125 10
- ❑ Software 11
- ❑ Documentation 11
- DAQ Device 13
- Parallel Scanning 14
- Troubleshooting in NI-DAQmx 16
- Connecting Signals 18
- Ground-Referenced Signal 19
- Floating Signal 20
- AC-Coupling 21
- Pin Assignments 22
- Temperature Sensor Connection 24
- Rear Signal Connector 24
- Configuring and Testing 26
- Configurable Settings in MAX 27
- NI-DAQmx 28
- Traditional NI-DAQ (Legacy) 29
- NI-DAQ (Legacy) 30
- Verifying the Signal 31
- Theory of Operation 34
- Operating in Multiplexed Mode 35
- Operating in Parallel Mode 36
- Using the SCXI-1125 38
- Typical Program Flowchart 42
- Programmatically 44
- Completing the Application 46
- Text Based ADEs 51
- (Legacy) 52
- Typical Program Flow 54
- NI-DAQ (Legacy) in LabVIEW 56
- Note The 62
- Performing a Multiplexed Scan 64
- C and Low-Level DAQ Functions 65
- LabVIEW and Parallel Mode 65
- C and Parallel Mode 66
- Calibration 67
- One-Point Offset Calibration 68
- 1000 0.005 V 69
- Specifications 70
- Appendix A Specifications 71
- Absolute Accuracy 72
- System Noise (peak, 3 sigma) 73
- Analog Inputs 74
- Power Consumption 75
- Output Characteristics 75
- Transfer Characteristics 75
- Stability 75
- Physical 76
- Maximum Working Voltage 77
- Environmental 77
- Electromagnetic Compatibility 78
- CE Compliance 78
- Environmental Management 79
- Removing the SCXI-1125 82
- ADDRESS 83
- Common Questions 84
- Glossary 88
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