Diagram

Figure 5-6 is a diagram illustrating the application of the UDC 3300 for

 

carbon potential control.

 

Figure 5-6

Carbon Potential Control

 

 

 

 

Carbon

 

Probe

O2

millivolts

Sensor

 

 

T/C

 

Input 2

Input 1

Carburizing Furnace

UDC 3300

f(x)f(x)

 

 

 

 

 

 

 

 

 

 

 

CP

 

 

%

 

 

%

 

 

 

 

 

 

 

 

 

 

 

 

Carbon

 

 

 

 

 

Carbon

 

 

 

Calc.

 

 

 

 

 

 

PV

• SP

PID • 2SP

• 3SP or

RSP

Input 3—

Optional Online

CO Compensation

Output

CV E/P

Enrichment Gas

24185

ATTENTION

For Carbon control, set Input Algorithm 1 to the proper carbon sensor used and set the PV source to IN AL 1. Input 1 will automatically become CARBON.

For % Oxygen control, set Input Algorithm 1 to OXYGEN. Input 1 will automatically become OXYGEN.

For Dewpoint control, set Input Algorithm 1 or Input Algorithm 2 to DEW PT. Input 1 will automatically become CARBON. The availability of Dewpoint on Input Algorithm 2 provides the capability of controlling Carbon Potential on Loop 1 and also reading the Dewpoint value from the same probe.

CO Compensation—Receives external CO transmitter signal via Input 3 to provide online compensation fo the carbon calculation. Requires that the Input 2 temperature signal be a transmitter type input.

4/00

UDC 3300 Controller Product Manual

203

Page 215
Image 215
Honeywell UDC 3300 manual Diagram, Carbon Potential Control, Udc