Table 4-38 Carbon Prompts - Honeywell VPR100 User Manual

Programming Function Blocks and Features
Carbon Potential
The Carbon Potential Control Function Block provides for weight percent (wt%) control of carbon in
carburizing, hardening, and atmosphere generating applications.
Prompt
PROBE TYPE
CARBON PROBE IN
PROBE TEMP INPUT
TEMPERATURE UNIT
TEMP LOW LIMIT
CO COMPENSATION
FURNACE FACTOR
SOOTING FACTOR
PERCENTAGE
HYDROGEN
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Table 4-38 Carbon Prompts

Range/Selections
NONE, AACP, SUPER
SYS, MARATHON, FCC
NUMBER, PARM, OFF
NUMBER, PARM, OFF
NONE, F, C, K, R
NUMBER, OFF
NUMBER, PARM, OFF
NUMBER, PARM, OFF
ON, OFF
NUMBER, OFF
VPR & VRX – User Manual
Definition
Selection which represents the manufacturer of the
oxygen probe being used. This determines which
linearization equations are used for %C and dewpoint
calculations.
Analog input that is connected to the oxygen probe mV
output.
Analog input that is connected to the oxygen probe
temperature output.
Temperature scale for this block. This selection must
match the temperature scale of the analog input that is
connected to the oxygen probe temperature output.
Probe temperature value below which this block's low
temperature discrete output (OS) is turned ON. This limit
and subsequent discrete output may be used to force the
control loop's output to a known value when the probe
temperature is too low for carbon potential control.
Number used in the %C calculation which represents the
%CO present in the endothermic gas.
Correction factor used to account for environmental
variation within the furnace chamber. In units of %C, this
factor is added directly to the %C value calculated from
probe output linearization.
Boolean value that determines whether the anti-sooting
factor output (A1) will be based linearly on probe
temperature (SOOTING FACTOR=ON) or a constant
value of 2.0 (SOOTING FACTOR=OFF). If SOOTING
FACTOR is ON, a probe temperature of 1408 °F or
below limits %C output to 0.75% and 2086 °F or above
limits %C output to 2.0%.
Number representing %H
2
calculation.
that is used in the dewpoint
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