Draught Menu; Flow Chart - Draught Menu - Seitron CHEMIST 400 Use And Maintenance Manual

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4.14

Draught Menu

The DRAUGHT menu gives access to the stack draught measurement. Being a negative pressure, in
accordance with standard UNI10845, draught must be measured using the negative pressure input P-. The
correct values for a natural draught boiler are therefore positive by definition. Before performing the
measurement the instrument allows the user to input the external air temperature as required by the standard.
Afterwards the measurement screen is reached: here the user can acquire the value displayed in order to add it
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to the running analysis measurements or, alternatively, print the relevant ticket through the 'PRINT' menu.
NOTE: The measurement may not be accurate due to condensation inside the fumes probe. Should you
notice an inaccurate or unstable reading on the instrument, it is advisable to disconnect the fumes
probe from the instrument itself, and purge pipes by blowing with a compressor. In order to be sure
there is no humidity, it is suggested to perform the measurement by means of the transparent rubber
pipe supplied on issue.
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4.14.1 Flow Chart - Draught Menu

Activates the Draught Menu.
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DRAFT
►T outdoor: 20°C
WARNING
Use P- negative
inlet
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DRAFT
0.00hPa
ZERO KEEP KEEP KEEP KEEP
DRAFT
6
0.00hPa
ZERO ZERO KEEP KEEP
ZERO ZERO KEEP KEEP
DRAFT
0.05hPa
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ZERO ZERO ZERO ZERO KEEP KEEP KEEP KEEP
O 4.2٪ Qs 8.6٪
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CO 9.3٪ ηs 91.4٪
2
λ,n 1.25 ηt 91.4٪
Tf 190.1C CO 146p
Ta 15.4C NO 40p
∆T 74.7C SO 41p
2
►RefO Auto:001
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NOTE: The draught values to be stored in the memory must be acquired before storing the analysis data.
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DRAFT
T outdoor: 20 °C
WARNING
Use P- negative
inlet
Before starting the pressure zeroing sequence pay attention to remove the gas probe from the stack.
Pressure zeroing is accomplished by pressing '
PRINT PRINT PRINT PRINT
►Print report
Print setup
Paper feed
Print test
Printer type
Once the data is stored, the instrument progresses automatically from the Draught Menu to the
Analysis Menu.
▼
DRAFT
T outdoor: 21 °C °C
°C °C
WARNING
Use P- negative
inlet
' with the ZERO option highlighted in the background.
Insert the probe in the stack and measure the
draught. In order to add the draught value to those
of the ongoing analysis, please select KEEP
PRINT REPORT
through the right arrow key, then press '
a printout of the ticket with the draught value,
running
Analysis
Model draft
enable the PRINT menu through the relevant key,
then proceed as in the combustion analysis
printing. A draught value acquired into memory can
PRINT QUIT
be deleted by pressing again the 'draught' key: a
series of dashes will appear in place of the
measurement value; after this select the 'KEEP'
option with '
Connect the probe pressure input hose to
the instrument P- input.
Enter the external air temperature.
'.
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