CODEL
OPS. 141
51
Issue : A
Revision : 1
Date : 14/06/18
Doc i/d :
0118/6
050028
Enter the temperature of the flue gas at the point of the across the duct
measurement. This value is used to normalise the dust measurement.
4.8.8.3. Oxygen
To correct the data to standard levels of oxygen, an estimate of the oxygen at
the point of measurement is required. If no normalisation for oxygen is required,
then a fixed value should be used and the standard level brought to the same
value.
If the oxygen level is being continuously measured, connect the analogue
output of the oxygen analyser into the CODEL analyser, and select the
analogue input.
A keypad input is assumed to be a DRY oxygen level. An analogue input level
can be selected for a WET or DRY oxygen measurement instrument.
Note that
mode 4 displayed oxygen is always expressed as oxygen % DRY for the
normalisation calculations
.
4.8.8.4. Pressure
To correct the data to a standard pressure normally 101kPa, the pressure at the
point of measurement needs to be determined. If the flue pressure is relatively
constant through all firing conditions, then a fixed input should be used. If the
pressure is not constant, it should be measured and bought into the instrument
via the 4 - 20mA input within the processor.
With an integrated system the pressure data can be taken to the instrument via
the serial data line.
If no normalisation for pressure is required, then a fixed value should be used
and the standard level brought to the same value.
4.8.8.5. Water Vapour
The standard level is set to wet or dry. For the set values option the percentage
water vapour in the flue gas needs to be determined and entered. This has a
range of 0.0 to 30.0%. If the vapour concentration is relatively constant a fixed
input should be used. If it is not it should be measured and brought into the
instrument via the 4 - 20mA input in the processor.
If no normalisation for water vapour is required, a fixed value should be used
and the standard set to dry.
Содержание EnergyTech 100 Series
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