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Appendix A Specifications
SCXI-1503 User Manual A-4 ni.com
Gain temperature coefficient
(gain 1 or 100) ........................................±15 ppm/°C max
±5 ppm/°C typ
Excitation
Channels .................................................16 single-ended outputs
Current output.........................................100 μA
Accuracy.................................................±0.05%
Temperature drift....................................±5 ppm/°C
Output voltage compliance .....................10 V
Maximum resistive load .........................100 kΩ
Overvoltage protection ...........................±40 VDC
Measurement Category...........................CAT I
Power Requirements From SCXI Backplane
V+ ...........................................................18.5 to 25 VDC, 170 mA
V– ...........................................................–18.5 to –25 VDC, –170 mA
+5 V ........................................................+4.75 to 5.25 VDC, 50 mA
Environmental
Operating temperature ............................0 to 50 °C
Storage temperature ................................–20 to 70 °C
Humidity.................................................10 to 90% RH, noncondensing
Maximum altitude...................................2,000 meters
Pollution Degree (indoor use only) ........2
- SCXI-1503 User Manual 1
- Important Information 3
- Conventions 4
- Contents 5
- Chapter 4 6
- Chapter 5 6
- About the SCXI-1503 9
- ❑ Software 10
- ❑ Documentation 10
- Chapter 1 About the SCXI-1503 11
- E/M Series DAQ Device 12
- Connecting Signals 14
- Chapter 2 Connecting Signals 15
- 4-Wire Configuration 16
- 2-Wire Configuration 17
- Two Matched Current Sources 19
- Front Connector 20
- Rear Signal Connector 23
- Configuring and Testing 26
- Configurable Settings in MAX 27
- NI-DAQmx 28
- Verifying the Signal 29
- Theory of Operation 31
- Chapter 4 Theory of Operation 32
- SCXIbus Interface 33
- Digital Control Circuitry 33
- Analog Circuitry 33
- RTD Measurement Errors 36
- Temperature in RTDs 36
- No standard. Check TCR 39
- Thermistors 40
- Using the SCXI-1503 44
- Chapter 5 Using the SCXI-1503 45
- Programmatically 46
- Completing the Application 51
- Text Based ADEs 54
- Calibration 56
- Specifications 58
- RTD Measurement Accuracy 59
- Amplifier Characteristics 59
- Dynamic Characteristics 60
- Stability 60
- Excitation 61
- Environmental 61
- Physical 62
- Maximum Working Voltage 62
- Electromagnetic Compatibility 63
- CE Compliance 63
- Removing the SCXI-1503 64
- Common Questions 66
- Appendix C Common Questions 67
- Glossary 69
- Numerics 76
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