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The Millikelvin Challenge—Cryogenic Control with Industrial PLCs. Roland Reiss, Sebastian Deiries. Cryogenic Controller. Beckhoff Programmable Logic Control (PLC) EtherCAT field bus (100Mbit/s) 24 bit analog input modules 24V/4A PWM outputs Features Precision temperature measurement

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The Millikelvin Challenge—Cryogenic Control with Industrial PLCs

Roland Reiss, Sebastian Deiries

cryogenic controller
Cryogenic Controller
  • Beckhoff Programmable Logic Control (PLC)
    • EtherCAT field bus (100Mbit/s)
    • 24 bit analog input modules
    • 24V/4A PWM outputs
  • Features
    • Precision temperature measurement
    • Graphical User Interface
  • Sensors
    • PT100..PT1000 RTDs
    • LakeShore Cernox RTDs
    • LakeShore DT-670 Si diodes
    • Edwards WRG (vacuum)
performance
Performance
  • Temperature resolution
    • PT100: 10mK
    • Cernox: <1mK (at 160K)
  • Temperature accuracy
    • Only limited by vendor calibration data
  • Control loop stability
    • ± 5mK pp