04/08 UDC3200 Universal Digital Controller Operator Manual 37
Function
Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter Definition
FCC
CARBON POTENTIAL FCC—Make this selection if you have a
Furnace Controls Corp Accucarb type Zirconium Oxide sensor.
This algorithm requires a temperature range within the region of
1380 °F to 2000 °F. See Note 3.
DEW PT
DEWPOINT OF CARBONIZING ATMOSPHERE—Use this
selection if you are using any Zirconium Oxide Carbon Probe and
you want to measure the atmosphere in terms of Dewpoint. The
range is –50 °F to 100 °F or –48 °C to 38 °C. This algorithm
requires a temperature range within the region of 1000 °F to 2200
°F and a minimum carbon probe value of 800 millivolts.
OXYGEN
PERCENT OXYGEN RANGE—Make this selection if you are using
a Zirconium Oxide Oxygen Probe to measure Percent of Oxygen in
a range of 0 to 40 % O
2
. This algorithm requires a temperature
range within the region of 800 °F to 3000 °F.
ATTENTION The Carbon and Dewpoint selections will automatically set the first input actuation to
Carbon. The Oxygen selection will automatically set the first input actuation to Oxygen. Input 2 can be
any input actuation, but it is normally a type K, R or S thermocouple input, depending upon the probe type
selected. All calculations are performed by the Controller with Percent Carbon shown as the PV display.
The actual value of each analog input may be viewed on the lower display. For all Carbon Types, if the
value of Percent Carbon falls below 0.1% - such as can happen when the Carbon Probe voltage output
falls below 900 mVdc – then the Controller will continue to update the PV display, but the accuracy is
unspecified. Likewise, if the measured temperature falls outside of the specified ranges as noted above
for the Carbon, Oxygen and Dewpoint input types, then the Controller will continue to update the PV
display, but the accuracy is unspecified. For the Dewpoint algorithm, if the Carbon Sensor voltage falls
below 800 mVdc, then the Dew Point is calculated as if the sensor voltage was at 800 mVdc.
MATH K
0.001 to 1000
floating
WEIGHTED AVERAGE RATIO OR MASS FLOW ORIFICE
CONSTANT (K) FOR MATH SELECTIONS—Only applicable for
algorithms W AVG or General Math selections MuDIV, MULT,
MuDIV, or MULT.
CALC HI
–999. To 9999.
Floating
(in engineering
units)
CALCULATED VARIABLE HIGH SCALING FACTOR FOR
INPUT ALGORITHM 1—Used only when either Summer, Input
Hi/Lo, or one of the General Math functions was selected as the
Input Algorithm. See Note 2.
CALC LO
–999. To 9999.
Floating
(in engineering
units)
CALCULATED VARIABLE LOW SCALING FACTOR FOR INPUT
ALGORITHM 1—Used only when either Summer, Input Hi/Lo, or
one of the General Math functions was selected as the Input
Algorithm. See Note 2.
ALG1 INA
INPUT 1
INPUT 2
OUTPUT
ALGORITHM 1, INPUT A SELECTION will represent one of the
available selections.
Input 1
Input 2
Output – Should not be used for Three Position Step Control
applications)
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