Emerson Rosemount CCO 5500, Reference Manual

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If you use the Keypad Input , and the gas temperature is higher than 572 ° F (300 °C), the
compensation algorithm becomes less precise, and instrument accuracy deteriorates
accordingly. Rosemount does not recommend this.
Note
If normalization is not required, the instrument must hold the temperature of the gas in the duct
using the
Analog Input option.
Press ENTER with the Temperature option selected to access Set Standard Levels and Set Values .
Use the arrow keys to toggle between these options and
Exit
.
Set Values
You can bring the normalizing data into the instrument in one of three ways:
• Analog Input
This uses the 4-20 mA inputs within the processor to receive the measured
transducer data. The values at 4 mA and 20 mA will be requested should this option
be selected.
• Serial Input
If you use an input unit, all normalizing data can be transmitted via the serial data
line.
• You can enter a fixed value via the keypad. This is suitable where the value is stable
to about ±5%.
With an integrated system, set the lead analyzer's normalizing parameters to the 4-20 mA
inputs. Then set all the other analyzers to serial, and the normalization parameters are
transmitted down the serial data highway.
Oxygen
To correct the data to standard levels of oxygen, you must enter an estimate of the oxygen
at the point of measurement. If the oxygen level is being continuously measured, connect
the analog output of the oxygen analyzer into the Rosemount
™
CCO 5500 Analyzer and
select Analog Input . You must define this input as either WET or DRY depending on how the
Operation
70 Rosemount CCO 5500