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MercuryiTC

A cryogenic programmable intelligent temperature controller.
Measures and controls temperatures to below 250 mK with a precision of 0.1 mK supporting all standard cryogenic sensors.​

Temperature Measurement​

A pressure sensor card can be added which can be used to control cryogen flow via the Auxiliary gas control cards.​

Pressure Measurement​

Auxiliary cards can be added into the MercuryiTC. A variety of optional temperature inputs, heater outputs, pressure transducer inputs and stepper motor drives can be configured.​

Auxiliary Card​


Features

  • Measures and controls temperatures to below 250 mK with a precision of 0.1 mK (24 bit A to D resolution).
  • Heater output up to 80 W per channel.
  • Software switchable between true constant voltage source or current source for sensor excitation, preventing self-heating and allowing for high quality measurements at the lowest temperature.
  • Supports all standard cryogenic sensors (ruthenium oxide, cernox, silicon diodes, platinum, thermocouple and RhFe).
  • Base system includes a single temperature sensor input and 80 W heater output for precise temperature PID control.
  • Easy pc connection to your Mercury instrument via multiple remote ports.
  • The MercuryiTC has also a number of pre-configured control modes e.g., Heliox control, Lambda Fridge control, Rotator control, etc.
  • Rear panel connections.
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Detailed Specifications

  • Number of inputs: 1 included as standard, up to 8 extra
  • Sensor ADC Resolution: 24-bit
  • Maximum reading rate: Up to 4 readings per second
  • Isolation: All sensors independently isolated
  • Supported sensor types: All standard types of cryogenic RTD’s (Resistance Temperature Detectors)​ plus diodes and thermocouples
  • Number of outputs: 1 incl. as standard, up to 3 extra
  • DAC Resolution: 16-bit
  • Max heater power: 80 W
  • Max current: 2 A
  • Max voltage: 40 V
  • Heater load range: 20 Ω​ to 2500 Ω​
  • Heater noise (0 - 2 MHz): < 2 mV
  • Sensor input: Up to 9
  • Heater output: Up to 4
  • N2 / He level meter: Up to 2
  • Auxiliary control (stepper motor): Up to 4
  • GPIB: 1
  • Number of loops: 1 incl. as standard, up to 3 extra
  • PID control: Fixed or zonal
  • Set point: Programmable
  • Proportional gain: 0 to 200 K (resolution 0.1)
  • Integral time: 0 to 200 mins (resolution 0.001)
  • Derivative rate: 0 to 300 mins (resolution 0.001)
  • Number of inputs: Up to 4
  • Sensor ADC​ Resolution: 24-bit
  • Maximum reading rate: Up to 4 readings per second
  • Voltage Ranges: 10 V, 1.6 V, 0.8 V, 0.4 V, 0.2 V, 0 – 0.1 V (Auto-ranging)​
  • Current Ranges: 4 – 20 mA, 20 mA, 16 mA, 8 mA, 4 mA (Auto-ranging)​
  • Absolute accuracy: ±0.1% full scale in each range
  • Sensor Excitation Voltage: 0 V(off) , 10 V ± 5% or 15 V ± 5%
  • Sensor Excitation Current: 0 - 20 mA
  • Supported sensor types: Voltage, Current and Ratiometric
  • Helium Level specifications
    • Excitation current settings: 20 mA to 280 mA in 20 mA steps
    • Excitation current accuracy: ±5%
    • Excitation voltage: 40 V maximum
    • Probe resistance: 0 to 300 ohms
    • Probe resistance accuracy: ±0.2%
    • Probe resistance stability: ±0.1%
    • A/D Resolution: 24-bit
    • Reading rate: 1 sample every 10s or 1 sample every 30 minutes.
    • Isolation: All sensors independently isolated
  • Number of cards: Up to 2
  • Each card supports a Helium Level input and a Nitrogen Level input
  • Nitrogen Level input
    • Probe source voltage: 12 VDC
    • Probe source oscillator frequency range: 5 kHz to 90 kHz
    • Probe sensing resolution (level): 0.1%
    • Probe sensing accuracy (level): 0.5%
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