National Instruments Module SCXI-1503 User Manual

Also see for Module SCXI-1503: CALIBRATION PROCEDURE

Contents

National Instruments Module SCXI-1503 User Manual Manual pdf 6 page image

ContentsSCXI-1503 User Manual vi ni.comChapter 4Theory of OperationRear Signal Connector, SCXIbus Connector, and SCXIbus Interface.......................... 4-3Digital Control Circuitry ............................................................................................... 4-3Analog Circuitry............................................................................................................ 4-3Analog Input Channels.................................................................................... 4-3Operation of the Current Sources .................................................................................. 4-4Theory of Multiplexed Operation.................................................................................. 4-4Measuring Temperature with Resistive Transducers .................................................... 4-5RTDs ............................................................................................................... 4-5RTD Measurement Errors ................................................................ 4-6The Relationship Between Resistance and Temperature in RTDs... 4-6Thermistors ..................................................................................................... 4-10Thermistor Measurement Circuits .................................................... 4-11Resistance/Temperature Characteristic of Thermistors.................... 4-12Chapter 5Using the SCXI-1503Developing Your Application in NI-DAQmx............................................................... 5-1Typical Program Flowchart ............................................................................ 5-1General Discussion of Typical Flowchart....................................................... 5-3Creating a Task Using DAQ Assistant or Programmatically ........... 5-3Adjusting Timing and Triggering..................................................... 5-3Configuring Channel Properties ....................................................... 5-4Acquiring, Analyzing, and Presenting.............................................. 5-7Completing the Application.............................................................. 5-8Developing an Application Using LabVIEW ................................................. 5-8Using a NI-DAQmx Channel Property Node in LabVIEW ............. 5-10Specifying Channel Strings in NI-DAQmx .................................................... 5-11Text Based ADEs ............................................................................. 5-11Programmable NI-DAQmx Properties ............................................. 5-13Calibration ..................................................................................................................... 5-13Internal/Self-Calibration ................................................................................. 5-13External Calibration ........................................................................................ 5-13