2704CP MODELS Atmosphere Furnace Controller/Programmer Ideal for: • • • • • Carburising furnaces Endothermic generators Sintering furnaces Incinerators Ceramic kilns Features: • Zirconia probe input • Temperature • Carbon, dewpoint or oxygen • Probe cleaning • Probe diagnostics • Maths and logic • Open communications It is capable of being used solely to control the carbon potential, dewpoint or oxygen in a furnace, or as an integrated furnace controller where any of these variables are controlled in conjunction with temperature. Additional features provide maths and combined logic functions. At the heart of the controller is a specially designed function block capable of accepting most zirconia probes. Standard features include an automatic probe cleaning routine, a sooting alarm and diagnostics indicating that the probe is about to fail and should be replaced. 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's iTools configuration software. The 2704CP is fully compatible with the standard 2704 process controller which is capable of up to three PID control loops; data sheet number HA026669. Furnace Temp Run Hold Reset The 2704CP is a fully programmable controller suitable for precision control of temperature, carbon potential, dewpoint and oxygen in atmosphere heat treatment applications. Temperature Control Loop Heating Cooling Temp SP Program Events Setpoint Programmer %Carbon SP Gas Ref CO Gas Reference Probe Temp %C Zirconia Function Block Carbon Control Loop Probe Clean Probe Fault Sooting Alarm Probe Clean

50 Setpoint programs 16 Program event outputs Simple program editing Program graphical display Trend view of PV and SP Trending enables the user to view, both current and historical information on the process on the process variable and setpoint of each control loop. The 2704 user interface offers the user an extremely easy method of editing, selecting and running programs and all programs can be given a meaningful name. Its programmer functions are very advanced and can be easily interfaced to remote instruments including specialised Mass Flow controllers. program editing can be achieved using...

Atmosphere Furnace Control System • • • • 2604CP A 2604CP is also available. Its display incorporates a 2 line 5 digit display for dislay of setpoint and process value, plus an LCD text panel that the operator uses for entry of program data and other parameters. Furnace temperature Carbon potential Quench temperature and timing Digital control functions The 2604CP is functionally capable of performing the same control strategy as the 2704CP. However, the customisable display of the 2704CP significantly simplifies the user interface for the operator. In combination with the 2500DIN rail controller,...

Ordering codes Controller Type Supply Voltage Furnace Control Sensor 2604 Standard 2604 Profibus 2704 Standard 2704 Profibus Unconfigured Type K Type N Type R Type S Type B Temp Control Output High voltage Low voltage Temperature Control Output Furnace Control Sensor Controller Function Carbon controller Dewpoint controller Oxygen controller Dewpoint/Temp controller Oxygen/Temp controller Carbon/Temp controller Carbon/Temp programmer Dewpoint/Temp programmer Oxygen/Temp programmer Zirconia Probe Type Zirconia Probe Type MV DP OX OP OL BC DR MC MD AC SS MI AA BH BO Probe Millivolts Dewpoint %...