Contents© National Instruments Corporation vii SCXI-1503 User ManualAppendix ASpecificationsAppendix BRemoving the SCXI-1503Appendix CCommon QuestionsGlossaryIndexFiguresFigure 2-1. 4-Wire Resistive Sensor Connected in a 4-Wire Configuration ...........2-3Figure 2-2. 2-Wire Resistive Sensor Connected in a 2-Wire Configuration ...........2-4Figure 2-3. 3-Wire Resistive Sensor Configuration.................................................2-5Figure 2-4. 3-Wire Configuration Using Matched Current Sources........................2-6Figure 4-1. Block Diagram of SCXI-1503...............................................................4-2Figure 4-2. 2-Wire RTD Measurement....................................................................4-6Figure 4-3. Resistance-Temperature Curve for a 100 Ω Platinum RTD,α = 0.00385 ...........................................................................................4-7Figure 4-4. Resistance-Temperature Curve for a 2,252 Ω Thermistor ....................4-11Figure 4-5. Thermistor Measurement with Constant Current Excitation ................4-11Figure 5-1. Typical Program Flowchart for Voltage Measurement Channels.........5-2Figure A-1. SCXI-1503 Dimensions ........................................................................A-5Figure B-1. Removing the SCXI-1503 .....................................................................B-2
