| Quote: |
After updating the wiring in the RTD Chassis, a signal is now seen at each ADC input. However, there seems to be a discrepancy between the voltages I measured out with the multimeter (see below). Next steps include:
- Finish final debugging
- Calibrate ADC inputs with known voltage source (likely to use DAC).
Voltage Readings:
RTD 1: 0.576 V
RTD 2: 0.578 V
RTD 3: 0.598 V
RTD 4: 0.563 V
RTD 5: 0.477 V
RTD 6: 0.463 V
RTD 7: 0.456 V
RTD 8: 0.491 V
Reference Resistor: 5.463 V
Total Voltage: 9.665 V |
After further modification of the RTD readout chassis (i.e. adding resistors, placing reference resistor in front of RTDs), here are the following direct measurements:
RTD 1: 0.484 V
RTD 2: 0.486 V
RTD 3: 0.503 V
RTD 4: 0.474 V
RTD 5: 0.495 V
RTD 6: 0.483 V
RTD 7: 0.476 V
RTD 8: 0.510 V
Reference: 5.847 V
Here are the Cymac signal readings:
RTD 1: 74
RTD 2: 67
RTD 3: 73
RTD 4: 45
RTD 5: 82
RTD 6: 75
RTD 7: 70
RTD 8: 71
Reference: 884
The one (possible) discrepancy here is the readout for RTD 4 via Cymac, since it's signal reading is ~30 counts lower than the others. I do not believe this is a wiring issue due to the direct measurements taken. |