ATaPsi: Integrated Vacuum and Temperature Control for Vacuum Ovens & Furnaces

What is ATaPsi?

ATaPsi — Automated Temperature and Pressure with a Single Interface — is an advanced process control solution designed to unify vacuum and temperature control within vacuum ovens and vacuum furnaces.

By integrating the DigiVac SNAP vacuum controller with the Eurotherm 3204 temperature controller, ATaPsi allows operators to monitor, control, automate, and log both process variables from a single interface. The result is improved repeatability, reduced operator intervention, and greater visibility into thermal vacuum processes.

Originally developed for pharmaceutical manufacturing applications requiring secure process documentation and synchronized data logging, the ATaPsi platform is now applicable across a wide range of industrial vacuum drying, thermal processing, and vacuum furnace applications.

The Challenge: Coordinating Vacuum and Temperature Processes

Many vacuum oven and vacuum furnace systems operate with separate temperature and vacuum controllers. While functional, this setup often creates process inefficiencies and inconsistencies because operators must manually coordinate pressure and temperature conditions.

This can lead to:

Inconsistent product quality
Operator error during ramping or process transitions
Limited process repeatability
Poor visibility into synchronized temperature and vacuum data
Difficult troubleshooting and validation
Increased process downtime

Applications such as pharmaceutical drying, thermal vacuum testing, degassing, material processing, and vacuum heat treatment require precise coordination between pressure and temperature to achieve reliable results.

The ATaPsi solution was developed specifically to solve these process control challenges.

How the ATaPsi Solution Works

The ATaPsi system combines vacuum control, temperature control, automation, and data logging into a unified architecture.

Core System Components

The standard ATaPsi configuration includes:

DigiVac SNAP Vacuum Controller
Eurotherm 3204 Temperature Controller
External DPP Vacuum Sensor
4–20 mA Input Module
Custom Vacuum & Temperature Recipe Package
SNAP-to-Oven Connection Kit
Torch Data Logger
Optional Vent Gas Regulator

This integrated approach allows the vacuum oven or furnace to operate under fully coordinated process control.

Unified Vacuum and Temperature Control

At the center of the system is the DigiVac SNAP vacuum controller. The SNAP manages vacuum setpoints while simultaneously communicating temperature setpoints to the Eurotherm 3204 controller.

Temperature Control Integration

The integration works through two primary communication signals:

A 0–10V output from the SNAP sends temperature setpoint commands to the Eurotherm controller
A 4–20 mA feedback signal from the Eurotherm returns live temperature data back to the SNAP

The Eurotherm 3204 then uses its PID control loop to regulate the oven or furnace heater and maintain the target temperature.

This creates a synchronized closed-loop control system where both temperature and vacuum conditions are monitored and coordinated together.

Improved Vacuum Measurement Accuracy

ATaPsi incorporates an external DPP vacuum sensor positioned closer to the process chamber for improved pressure measurement accuracy.

Compared to standard vacuum controller configurations, the external sensor provides:

Faster pressure response
Improved vacuum stability
Expanded measurement range
Better process visibility

Typical measurement capabilities include:

Down to 500 millitorr
Down to 20 millitorr depending on sensor configuration

This expanded range is especially beneficial for vacuum drying and thermal processing applications requiring tighter vacuum control.

Recipe-Based Vacuum and Temperature Automation

One of the most powerful features of the ATaPsi system is its recipe-driven automation capability.

Users can create customized process recipes that automate:

Vacuum setpoints
Temperature ramps
Dwell times
Step transitions
Remote setpoint changes

This enables fully repeatable vacuum oven and furnace processes with minimal operator interaction.

Recipe automation helps manufacturers:

Reduce process variability
Standardize production
Improve batch consistency
Increase throughput
Reduce manual oversight

Integrated Vacuum & Temperature Data Logging

The included Torch Data Logger provides simultaneous logging of both vacuum and temperature data throughout the process cycle.

This synchronized process visibility supports:

Process validation
Batch documentation
Troubleshooting
Quality assurance
Regulatory compliance
Performance optimization

For pharmaceutical and highly regulated industries, secure and reliable process data logging is critical to maintaining compliance and traceability.

Optional Dry Nitrogen Vent Integration

An optional dry nitrogen vent system can also be integrated into the ATaPsi platform.

Benefits of inert gas venting may include:

Reduced contamination
Cleaner chamber conditions
Improved drying efficiency
Controlled venting during process completion
Enhanced process flexibility

While optional, this feature can improve performance in sensitive vacuum processing applications.

Advanced PLC & RS232 Automation Upgrades

Following the initial ATaPsi deployment, expanded automation features were developed to support deeper integration with facility-wide process control systems.

RS232 PLC Communication

The SNAP controller now supports RS232 communication for direct PLC integration, enabling centralized monitoring and control.

Remote Recipe Operation

Operators can remotely:

Start recipes
Stop recipes
Monitor process progress
Control system status from a PLC or supervisory control system

Real-Time Recipe Status Feedback

The system communicates live status updates including:

Recipe start confirmation
Running status
Completion indication
Estimated progress
Remaining process time

Step-Level Recipe Visibility

ATaPsi can report the currently active recipe step to the PLC, supporting up to 80 programmable process steps.

This allows tighter synchronization with external automation systems and improved process traceability.

PLC Temperature Setpoint Control

Temperature setpoints can also be adjusted dynamically through RS232 communication, allowing the PLC to coordinate thermal conditions with larger automated manufacturing processes.

Applications for ATaPsi

ATaPsi is ideal for applications requiring synchronized thermal and vacuum process control, including:

Vacuum drying
Pharmaceutical processing
Vacuum furnaces
Thermal vacuum testing
Degassing applications
Materials processing
Vacuum heat treatment
Research laboratories
Aerospace component processing
Semiconductor manufacturing

Conclusion

The ATaPsi solution simplifies complex vacuum oven and vacuum furnace operations by integrating vacuum control, temperature control, automation, and data logging into a single coordinated platform.

By combining the DigiVac SNAP controller with Eurotherm temperature control technology, ATaPsi delivers:

Improved process repeatability
Reduced operator intervention
Enhanced process visibility
Automated recipe execution
Integrated data logging
Scalable PLC automation capabilities

For manufacturers and laboratories requiring reliable thermal vacuum process control, ATaPsi provides a flexible and scalable solution that improves efficiency, consistency, and confidence in process outcomes.

For more information about our ATaPsi System contact us at [email protected] or call at 732-765-0900. Submit and inquiry HERE.