National Instruments SCXI-1125 user manual

SCXITM

SCXI-1125 User Manual

SCXI-1125 User Manual

April 2008

372425B-01

Contents

Main Page Important Information Warranty Copyright Trademarks Patents Conventions Contents Chapter 1 About the SCXI-1125 Chapter 2 Connecting Signals Chapter 3 Configuring and Testing Chapter 4 Theory of Operation Chapter 5 Using the SCXI-1125 Page Page Tables About the SCXI-1125 What You Need to Get Started National Instruments Documentation Page Installing Application Software, NI-DAQ, and the DAQ Device Connecting the SCXI-1125 to a n E/M Series DAQ Device for Parallel Scanning Verifying the SCXI-1125 Installation in Software Installing SCXI Using NI-DAQmx in Software Manually Adding Modules in NI-DAQmx Installing SCXI Using Traditional NI-DAQ (Legacy) in Software Manually Adding Modules in Traditional NI-DAQ (Legacy) Verifying and Self-Testing the Installation Troubleshooting the Self-Test Verification Troubleshooting in NI-DAQmx Page Connecting Signals AC and DC Voltage Connections Ground-Referenced Signal Floating Signal AC-Coupling Pin Assignments Table 2-1. Front Signal Pin Assignments Temperature Sensor Connection Rear Signal Connector Table 2-2. Rear Signal Pin Assignments Configuring and Testing SCXI-1125 Software-Configurable Settings Common Software-Configurable Settings Filter Bandwidth Gain/Input Range Configurable Settings in MAX NI-DAQmx Creating a Voltage Global Channel or Task Traditional NI-DAQ (Legacy) Configuring Module Property Pages in Traditional NI-DAQ (Legacy) Creating a Virtual Channel Verifying the Signal Verifying the Signal in NI-DAQmx Using a Task or Global Channel Verifying the Signal in Traditional NI-DAQ (Legacy) Verifying the Signal Using Channel Strings Verifying the Signal Using Virtual Channel Theory of Operation Figure 4-1. SCXI-1125 Block Diagram Gain Filter Bandwidth and Cutoff Frequency Operating in Multiplexed Mode Multiplexed Hardware Operation Theory Operating in Parallel Mode Theory of Parallel Hardware Operation Using the SCXI-1125 Temperature Measurements Using Thermocouples Page Page Making High-Voltage Measurements Developing Your Application in NI-DAQmx Typical Program Flowchart Figure 5-1. Typical Program Flowchart General Discussion of Typical Flowchart Creating a Task Using DAQ Assistant or Programmatically Adjusting Timing and Triggering Configuring Channel Properties Acquiring, Analyzing, and Presenting Completing the Application Developing an Application Using LabVIEW Page Using a DAQmx Channel Property Node in LabVIEW Specifying Channel Strings in NI-DAQmx Page Text Based ADEs LabWindows/CVI Measurement Studio (Visual Basic, .NET, and C#) Programmable NI-DAQmx Properties Developing Your Application in Traditional NI-DAQ (Legacy) Traditional NI-DAQ (Legacy) in LabVIEW Typical Program Flow Figure 5-3. Typical SCXI-1125 Program Flow with Traditional NI-DAQ (Legacy) Configure the SCXI-1125 Settings Using Traditional NI-DAQ (Legacy) in LabVIEW Configure, Start Acquisition, and Take Readings Using Traditional NI-DAQ (Legacy) in LabVIEW Convert Scaling Using Traditional NI-DAQ (Legacy) in LabVIEW Analyze and Display Using Traditional NI-DAQ (Legacy) in LabVIEW Traditional NI-DAQ (Legacy) in Text-Based ADEs Configuring System Settings Using Traditional NI-DAQ (Legacy) C API Configure Module Settings Using Traditional NI-DAQ (Legacy) C API Perform Offset Null Compensation Using Traditional NI-DAQ (Legacy) C API Perform Acquisition Using Traditional NI-DAQ (Legacy) C API Perform Scaling, Analysis, and Display Using Software for Multiplexed Scanning LabVIEW and the SCXI Channel String LabVIEW and the Virtual Channel String Performing a Multiplexed Scan C and Low-Level DAQ Functions Using Software for Parallel Scanning LabVIEW and Parallel Mode C and Parallel Mode Other Application Documentation and Material Traditional NI-DAQ (Legacy) CVI Examples Traditional NI-DAQ (Legacy) Measurement Studio Examples Calibration Calibration Procedures One-Point Offset Calibration Two-Point Gain and Offset Calibration A Specifications Input Characteristics Page Absolute Accuracy Page Analog Inputs Page Physical Figure A-1. SCXI-1125 Dimensions Weight....................................................641 g (22.6 oz) Maximum Working Voltage Environmental Safety Electromagnetic Compatibility CE Compliance Environmental Management Waste Electrical and Electronic Equipment (WEEE) RoHS B Using SCXI Channel Strings with Traditional NI-DAQ (Legacy) 7.0 or Later Page C Removing the SCXI-1125 Removing the SCXI-1125 from MAX Removing the SCXI-1125 from a Chassis Page D Common Questions Page Page Page Glossary Numbers/Symbol A B C D E Page K L M N O P R S Page T U V W Index A C D E F G H I N P R S T V