Temperature Measurement


Vacuum furnace controller/programmer

April 2002 Temperature Measurement

The Eurotherm model 2704C vacuum furnace instrument is a fully programmable controller suitable for precision temperature and vacuum control in heat treatment applications. Available from Protea Automation Solutions, it is capable of being used solely to control the vacuum pump down sequence of a furnace or as an integrated controller where both temperature and vacuum are controlled. Additional features provide maths and combinational logic functions.

At the heart of the vacuum controller is a specially designed function block capable of accepting up to three vacuum inputs. Standard features include automatic and bumpless switchover between the high and low vacuum gauges and an additional input that can be used for inputs such as backing vacuum and backfill pressure. Six switched outputs are available and other features include a gauge-enable signal for high vacuum, roughing pump timeout alarm and a leak detection routine.

For standard applications, controllers are shipped pre-configured to the users specification, using a simple-to-complete order code. User customisation can be achieved by reconfiguring the controller via its front panel interface or Eurotherm iTools configuration software. The 2704VC is fully compatible with the standard 204 three-loop controller data sheet number HAO26669.

Jerry Smits, Protea Automation Solutions

011 719 5700

pas@protea.co.za





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