The DXTC-290 is a digital ultra-low temperature controller designed for precise thermal regulation in cryogenic research and industrial low-temperature processes. It features dual-loop PID control, with each loop independently associated with any of the connected sensors. The instrument supports multiple sensor types and offers Ethernet, RS-485, and USB communication for flexible system integration.

Key Features

• Dual-Loop PID Control: Two independent control loops, each with P, I, D, and manual output settings. The first loop provides a low-noise 100 W (upgradable to 200 W) heater output, and the second loop offers a 1 W (upgradable to 100 W) heater output.
• Multi-Sensor Input: Standard 2-channel input, expandable to 10 channels. Each channel has an independent temperature curve. Compatible with diode, Cernox, platinum RTD, and thermocouple sensors.
• Flexible Communication: Ethernet, RS-485 (up to 1200 m), and USB interfaces. Supports standard MODBUS protocol and custom ECT protocol. Up to 247 devices on a single RS-485 network.
• 5-Inch Touchscreen: Color capacitive touchscreen with Chinese/English display. Supports multiple temperature units (K, °C, V, Ω) with a display resolution of 0.0001 K.
• Comprehensive Safety Protection: Temperature set point limit, curve temperature limit, heating output slope limit, power gear limit, heater short circuit protection, and power-on heating disable.

Technical Specifications

• Measurement Accuracy: 10 mK (optimal)
• Temperature Range: 300 mK to 1505 K (sensor-dependent)
• ADC Resolution: 24-bit, 10 readings per second per channel
• Signal Filtering: Window 1-10% FS, 2 to 64-point digital filter
• Data Storage: Up to 64 temperature curves, including 20 standard calibration curves
• Thermoelectric Compensation: Supported for resistive sensors

Applications

• Ultra-low temperature physics experiments
• Quantum computing cooling system control
• Superconducting material characterization
• Cryogenic sensor calibration
• Dilution refrigerator temperature regulation