E+PLC400 with E+HMI, ideal for advanced vacuum HT systems
• High vac / low vac / partial pressure control
• Furnace temperature control
• Load thermocouple inputs
• Quench gas control (gas type/pressure)
• Setpoint programming
• Inbuilt trend and tamper resistant data recording
• IIoT (Industrial Internet of Things) ready
• Easily integrated with 3rd party PLCs (hybrid system)
Eurotherm vacuum cycle overview
Advanced vacuum HT system control
Setpoint control as above, plus leak-rate detection and pumping-time systems to aid the optimization of cycle-times. This IIoT ready system also allows enhancement with predictive maintenance functionality.
The thermocouple linearization function block converts the mV input reading and cold junction temperature into a temperature output. It also provides scaling, low pass filtering, offset and manual-override capabilities.
Autotune PID control
Provides a channel output to control a process variable (PV), using a precision PID control algorithm designed by Eurotherm. Autotune is included, as well as a ‘cutback’ feature to control overshoot behavior. A gain scheduling feature is available for adding extra PID tuning sets, to help maintain tight control at different setpoints.
Derives the working lifespan of thermocouples in days or number or times used, under different ranges of operating temperature. The block monitors usage times and temperatures, and indicates whether the thermocouple is still valid for use according to the AMS2750E standard.
* Available in E+PLC only
Converts raw electrical measurements into vacuum pressure values. It also supplies a gas calibration factor for non-N2-type atmospheres, low pass filtering, offset, and manual override. Provides vacuum gauge linearization for several common vendors, as well as user defined linearization capability.
Allows for smooth (bumpless) switching between a “low” vacuum gauge, such as a Pirani gauge, and a “high” ionization type such as an inverted magnetron or Penning gauge.
Optimizes vacuum cycle time by alerting operators to a controller detected event or leak in the vacuum system. It can be configured to signal an alarm if a particular vacuum pressure has not been reached in a given amount of time.
Implements a leak test strategy for a vacuum chamber, using industry standard leak-rate methodology.
Vacuum sequence and integrated control systems
Example solutions dependent on I/O options
1.E+PLC400 with any number of modules from zero upward can be used to create a hybrid advanced vacuum heat treatment control system, in combination with Schneider Electric, Eurotherm and 3rd party PLCs.
Product I/O options shown are for example only. Contact your local Eurotherm sales representative to discover the most suitable solution for your process.