Figure 5-6 Carbon Potential Control - Honeywell UDC 3300 Product Manual

Diagram
O
2
Sensor
T/C
Carburizing
Furnace
ATTENTION
4/00
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
millivolts
Input 2
f(x)
%
Carbon
PV
UDC 3300
• 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.
UDC 3300 Controller Product Manual
Input 1
f(x)
Input 3—
Optional Online
CP
CO Compensation
%
Carbon
Calc.
• SP
PID
• 2SP
• 3SP or
RSP
Output
CV
E/P
Enrichment Gas
24185
203