Ultra-Low Temperature Freezer Construction and Control Systems
This course provides specialized instruction in the structural anatomy, insulation dynamics, and control architectures of ultra-low temperature (ULT) freezers operating down to $-86^\circ\text{C}$. Technicians explore cabinet shell engineering, multi-layer gasket configurations, heated perimeter loops, and advanced thermal insulation systems, including vacuum insulated panels and high-density polyurethane foams. The curriculum thoroughly examines electronic management systems, covering microprocessor controls, proportional-integral-derivative algorithms, sensor arrays, variable-frequency drives, power distribution, and electromechanical safety interlocks. Through rigorous classroom theory and structured laboratory exercises, students evaluate thermal degradation, test wiring integrity, calibrate platinum resistance thermometers, and diagnose complex electrical and microelectronic faults. Emphasis is placed on preventative maintenance protocols, energy efficiency considerations, and systematic diagnostic methodologies required to ensure long-term equipment reliability in clinical, research, and pharmaceutical storage environments. Technicians finish the course equipped to systematically inspect, troubleshoot, and repair ULT cabinet structures and automation systems.
InstructorJacob CalhounPrerequisites
Course outline
Lectures, virtual labs, and graded assignments — completed in your browser.
Syllabus
["Week 1: Lesson 1: Cabinet Structural Shells, Thermal Breaks, and Internal Liners", "Week 2: Lesson 2: High-Performance Insulation: Polyurethane Foams and Vacuum Insulated Panels", "Week 3: Lesson 3: Gasket Sealing Systems, Outer Doors, and Heated Pressure Relief Ports", "Week 4: Hands-on Lab: Cabinet Integrity Evaluation, Gasket Alignment, and Relief Port Servicing", "Week 5: Lesson 5: Electrical Power Distribution, Line Voltage Conditioning, and Surge Suppression", "Week 6: Lesson 6: Temperature Sensing Devices: Resistance Temperature Detectors and Thermistors", "Week 7: Lesson 7: Microprocessor Controllers, User Interfaces, and PID Control Logic", "Week 8: Hands-on Lab: Temperature Sensor Calibration and Controller Input/Output Verification", "Week 9: Lesson 9: Compressor Electrical Controls, Contactors, and Sequential Stage Starting", "Week 10: Lesson 10: Evaporator Fan Controls, Condenser Modulation, and Valve Actuation", "Week 11: Hands-on Lab: Electrical Schematic Diagnostics and Control Loop Fault Simulation", "Week 12: Lesson 12: Safety Interlocks, High-Pressure Cutouts, and Thermal Overload Protection", "Week 13: Lesson 13: Electronic Firmware Diagnostics, Alarm Routing, and Event Log Analysis", "Week 14: Capstone Service Project: Comprehensive Cabinet and Controls Overhaul and Commissioning"]