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Precise Vacuum Furnace Control for Retrofits & New Vacuum Furnaces with Protherm Universal Programmable Controllers


UPC-MARATHON control solutions are modular packages based on our Protherm 470, 510, 610, and 710 controllers with onboard IO or connected to a new or existing PLC. All solutions are designed to significantly improve your operations, meet industry standards, and ultimately provide you with precise and reliable process control. Control solutions come in several formats including full control panels, retrofit plates, and controller-only packages. Standard and custom configurations are available for new or upgrade applications and include state-of-the-art equipment backed by our extensive technological expertise.

All vacuum solutions include:

  • Guaranteed soaks based on multiple work thermocouples
  • Built-in uniformity survey capability
  • Temperature control with multiple PID sets for increased uniformity and overshoot control
  • Monitoring of all critical process factors with less operator involvement
  • Batch production logs
  • Digital chart recorder





  • Multiple PID tuning sets for excellent temperature control
  • Standard inputs include:
    Furnace temperature
    Low vacuum gauge
    High vacuum gauge
    Foreline vacuum gauge
    Various pump temperatures
    3 work thermocouples standard (additional as options)
  • Digital trim options available
  • Guaranteed soak stages with multiple load thermocouples
  • Interface to popular vacuum gauges
  • Non-expendable thermocouple tracking
  • Plain language recipe controls – no need to remember event stages
  • Cost-effective configurations for new installations and retrofits
  • Recipe control for repeatability
  • Batch production logs in PDF and CSV formats
  • Real time and historical paperless chart recorder displaying process variables
  • High accuracy and reliability
  • Alarm notification and processing
  • Multi-level password-protected interface
  • Onboard IO Probe interface
  • Probe Care advanced oxygen probe monitoring system
  • Built-in web server for remote monitoring
  • Internal data storage
  • Remote support ready
  • Seamless integration with Protherm 9800 SCADA system
  • Interfaces with SCADA systems via Modbus or optional Profibus
  • Modbus RTU and TCP
  • Optional CANopen/DeviceNet interfaces
  • Optional Profibus slave or master
  • Optional High-limit temperature controllers for furnace and quench



  • Hi-limit temperature controller
  • Dynamic digital temperature control trim
  • Up to 12 work T/Cs option. (More T/Cs available on request)


UPC control solutions are designed and built with compliance in mind. We focus on the heat-treating industry so we understand and keep up to date with AMS 2750, AMS 2759, NFPA 86, CQI-9, and Nadcap standards. Our systems offer the necessary features to help heat treaters of all types and sizes maintain compliance.
If you have an older system and require an update following a standard revision, please contact us for a quote.


CONTROLLER: PROTHERM 470, 510, 610, 710
All controller options have similar control features and available options. The difference between the controllers is simply the size and type of interface. See the Protherm controller page or brochure for more details.

Our light control solutions package offers the most possible features and utilizes our specialized onboard IO cards. Light solutions include recipe control, process atmosphere, temperature and quench controls, digital chart recorder, batch production logs and much more in one compact package. Light solutions can be customized for specific functions and additional control options or integrated with an existing PLC.

Plate solutions include the light solution, plus a pre-wired electrical plate including relays and terminals for integration into an existing panel. The plate is designed to mount on the side or inside door of an existing control panel. Plate solutions are ideal for replacing old controls without the cost of upgrading an existing panel’s power supply and motor control components. Plate solutions ca be customized with a new PLC or communicate directly with an existing PLC.

Panel solutions include the light solution, plus a small pre-wired electrical panel including relays and terminals for mounting near or on an existing panel or furnace. Panel solutions are ideal for replacing old controls without the cost of upgrading an existing panel’s power supply and motor control components. Panel solutions can be customized with a new PLC or communicate directly with an existing PLC.

Full panel control solutions include everything you need to completely update your existing furnace control panel. These packages include a full height control panel with power distribution, motor control, and control components. Full panel solutions are customized to meet your specific needs and functions and come with a new PLC.

Digital trim helps with temperature uniformity across the entire temperature range of the furnace. It includes SCR controllers with separate control outputs per heating zone and digital trim setpoints on the user interface.

Additional work thermocouples can be added to any solution.

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