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Instruction Manual
IM-106-5500, Original Issue
August 2005
CCO 5500
4-18
Setting the Normalizing
Parameters
After selecting the parameter to be set up, the ARROW keys will select
between entering the standard levels and how the normalization data is to be
brought into the instrument.
Set Standard Levels
Each normalizing parameter normalizes the
measured gas concentration to standard
conditions of temperature, oxygen, pressure
and water vapor. These levels are set from
within this option. Use the ARROW keys to change each displayed
normalizing standard value.
Set Values
The normalizing data can be brought into the instrument in one of 3 ways:
1. By entering a fixed value via the keypad.
This is suitable where the value is stable
to about ±5%.
2. If an INPUT UNIT is being used, all
normalizing data can be transmitted via
the serial data line.
3. Use the 4-20 mA inputs within the
processor to receive a measurement
transducer data. The values at 4 mA and
at 20 mA will be requested should this
option be selected.
With an integrated system the lead analyzer should have its normalizing
parameters set to 4-20 mA inputs. Select the above analog screen and enter
the values required for the 4 mA and 20 mA inputs. For the oxygen input the
value must be selected as a wet or dry gas measurement. This is explained in
more detail below. All the other analyzers in an integrated system must be set
to the serial inputs and the normalization parameters will be transmitted down
the serial data highway.
Temperature An analog input should always be used for temperature correction - this
ensures that the flue gas temperature is being measured continuously and
accurately. Connect the analog output of the temperature transducer into the
CCO 5500 analyzer and select the analog input option. This value is used to
normalize the gas concentration measurement and to correct for the effects of
temperature on the IR absorption spectrum.
If a fixed value input is used then at flue gas temperatures higher than 572
o
F
(300
o
C) the compensation algorithm will become less precise and instrument
accuracy will deteriorate accordingly. This is not recommended.
NOTE
If normalization is not required, the instrument must hold the temperature of
the gas in the duct - analog input.
5 TEMP DegF
std level 000
5 TEMP DegF
Keypad Input
5 TEMP
Serial Input
5 TEMP DegF
Analog Input