15
System:
Within the system sub-menu are the following displays:
Clear Faults:
If the 'Fault' LED is lit - selecting the 'Yes' option will attempt to clear the indicated
faults.
Analysis:
Switches between wet or dry analysis. See 'Making the Gas Measurement' (3.2.2) for
explanation of Wet and Dry measurement.
Water:
This represents the % of water contained in the flue gas when undertaking 'WET' analysis.
The amount for coal is typically 6 - 8%.
Where the analysis is wet, the water content in% terms is also displayed.
The formula for wet analysis is as follows:
ppm (wet) = (1 - H
2
O) (ppm) dry
100 where H
2
O = % water content
Normalization
Factor:
See Oxygen normalization for method of calculating the O
2
factor.
NO
x
Factor:
The concentration of NO
x
is determined according to which sensors are fitted. i.e NO
and NO
2
.
NOTE: The NO
2
cell is NOT available on the 1000 Series line. If required see Firetron 2000 Series
line.
The following example demonstrates how the NO
x
concentration is determined on the FT1300-1
only.
FT1300-1 only
NO + NO
2
Factor = NO
x
The NO
2
factor is entered under SETUP > SYSTEM > NO
2
Factor
The NO
2
Factor is a percentage correction required for NO
x
readings when the NO
2
sensor is not fit-
ted. This is typically less than 5%. On the Series 1000, NO
2
is not available, therefore NO
x
is calcu-
lated. It is also worth noting that 95% of the total Nox is formulated from NO %.
MENU
HELP
ABORT
NEXT
CLEAR FAULTS
NO/YES
F1
F2
F3
F4
MORE...
ANALYSIS:
MENU
HELP
ABORT
NEXT
DRY/WET
F1
F2
F3
F4
O2 NORMALIZATION:
WATER:
O2 FACTOR:
NO2 FACTOR
NO/YES
X.X%
X.X%
X.X%
MORE...
