Contents
SCXI-1125 User Manual vi ni.com
Chapter 3Configuring 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 4Theory 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 5Using 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