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Model 32 Cryogenic Temperature Controller


UpUp Model 32 General Specifications

User Interface

Display Type: 20 x 2 character VFD, 9mm character height.

Number of Inputs Displayed: Two.

Keypad: Sealed Silicon Rubber.

Temperature Display: Six significant digits, autoranged.

Display Update Rate: 0.5 Seconds.

Display Units: K, C, F or native sensor units.

Display Resolution: User selectable to seven significant digits.

Input Channels

There are two input channels, each of which may be independently configured for any of the supported sensor types.

Sensor Connection: 4-wire differential. DIN-5 or DIN-6 Connectors.

Sensor Types: See Supported Sensor Table.

Sensor Selection: Front Panel or remote interface. There are no internal jumpers or switches.

Sensor Resolution: Sensor Dependent. See Sensor Performance Data table.

Sensor Excitation: Constant current: 1mA, 100uA or 10uA. Constant voltage: 10mV RMS. Excitation Current: 1.0mA to 10nA in steps of 5% of power.

Resistance Measurement type: Ratiometric bridge.

Resistance Range: Constant-voltage, Maximum resistance = 100KΩ

AC Excitation Frequency: Resistor sensors in constant-voltage mode: 1.25Hz bipolar square-wave.

Sample Rate: 10Hz per channel.

Measurement Resolution: Sensor Dependent.

Digital Resolution: 24 bits.

Measurement Drift: 25ppm/°C.

Isolation: Input channel circuits are electrically isolated from all other internal circuitry.

Measurement Filter: 0.5, 1, 2, 4, 8, 16, 32 and 64 Seconds.

Calibration Curves: Built-in curves for industry standard sensors plus four user curves with up to 200 entries each. Interpolation is performed using a Cubic Spline.

CalGen™: Calibration curve generator fits any Diode, Thermocouple or resistor sensor curve at 1, 2 or 3 user specified temperature points.

Control Outputs

Number of Loops: Two.

Control Input: Either sensor input.

Loop Update Rate: 10Hz per loop.

Control Type: PID table, Enhanced PID, Ramp or Manual.

Autotune: Minimum bandwidth PID loop design.

PID Tables: Six user PID tables available for storage of setpoint vs. PID and heater range. Up to 16 entries/table.

Set-point Accuracy: Six+ significant digits.

Fault Monitors: Control loops are disconnected upon detection of a control sensor fault or excessive internal temperature.

Over Temperature Disconnect: Heater may be relay disconnected from user equipment when a specified temperature is exceeded on any selected input.

Loop #1 Primary Heater Output

Type: Short circuit protected linear current source. Maximum compliance is selectable at 25V or 50V.

Ranges: Three output ranges of 1.0A, 0.33A and 0.10A full-scale, which correspond to 50W, 5.0W and 0.5W when used with a 50Ω load.

Load Resistance: 25Ω or 50Ω. Heaters down to 10Ω can be used with the 25Ω range.

Minimum Load: 10Ω in 25W setting, 40Ω in 50W setting.

Digital Resolution: 1.0ppm of full-scale power (20 bits). Readbacks: Heater output power, Heatsink temperature.

Loop #2 Output

Type: Voltage output, 0 to 10 Volts. Input impedance is 500Ω.

Digital Resolution: 1.0ppm of full-scale power (20 bits).

Status Outputs

Audible and Visual Alarms: Independent audible remote and visual alarms.

Status reported via Remote Interface: Sensor fault, Heater over temperature fault.

Remote Interfaces

Remote interfaces are electrically isolated to prevent ground loops.

Remote Programming Language is IEEE SCPI compliant.

National Instruments LabVIEW™ drivers available.

RS-232: Serial port is an RS-232 standard null modem. Data rates are 300, 1200, 4800, 9600, 19,200 and 38,400 Baud.

IEEE-488 (GPIB): Full IEEE-488.2 compliant.

Optional LAN: 10 / 100 Ethernet LAN. Connects to GPIB port.

Optional USB: USB 1.1 and 2.0 compliant. Serial port emulation.

User Setups

Four User Setups are available that save and restore the complete configuration of the instrument.


Ambient Temperature: 25°C ± 5 °C for specified accuracy.

Mechanical: 8.5”W x 3.5”H x 12”D. One half-width 2U rack. Instrument bail standard, rack mount kit optional.

Weight: 9 Lbs.

Power Requirement: 100, 120, 220 or 240VAC.
+5% -10%. 50 or 60Hz, 150VA.

UpUp Model 32 Supported Sensors

Silicon Diode sensors use a fixed excitation current of 10uA and an input voltage range of 0 to 2.5V.

Negative and Positive Temperature Coefficient (NTC) / (PTC) resistor sensors are supported using a ratiometric bridge technique to cancel low frequency noise.

PTC sensor types include Platinum and Rhodium-Iron. Excitation currents are 1.0mA, 100uA and 10uA DC. Corresponding full-scale resistance ranges are: 625Ω, 6.25KΩ and 62KΩ.

NTC sensors include Ruthenium-Oxide, Carbon Glass, Germanium and Cernox™. Constant-voltage sensor excitations of 10.0mV, 3.3mV or 1.0mV allows the use of these sensors over an extended temperature range. Minimum excitation current is 10nA.

Thermocouple sensors are supported by ordering an optional Thermocouple input. This option provides a special input connector and a screw-terminal attachment to the Thermocouple wires. An internal Cold Junction Compensation circuit is provided. Input voltage range is ±80mV.

Model 32 Supported Sensors

Temperature Range

Example Sensors

Silicon Diode

1.4 — 500K

Cryo-con™ S900 / S950
Si440, Si430, Si410
Lakeshore DT-670, DT-470

Platinum RTD

14 — 1200K

Cryo-con™ CP-100, GP-100,
   XP-100, XP-1K


1.4 — 800K

Oxford PHZ 0002


200mK —100K

Lakeshore GR-200A

Carbon Glass

1.4 — 325K

Lakeshore CGR-1-500


200mK — 325K



500mK — 200K

SI RO-105, SI RO-600

CalGen™ and Cryo-Con™ are registered trademarks of Cryogenic Control Systems, Inc.
All other product and company names are trademarks or trade names of their respective companies.
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Specifications subject to change without notice. ©Cryogenic Control Systems, Inc. 1998 - 2019