Vacuum heat treatment control solutions Optimizing efficiency and regulatory compliance

T/C block

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.

Thermocouple life*

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

Vacuum input

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.

Gauge switch

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.

Pump-down timer

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.

Leak rate

Implements a leak test strategy for a vacuum chamber, using industry standard leak-rate methodology