Instruction Manual MM850402 ed. 08b
34
Now you can proceed with the Smoke index measurement and/or the gas analysis. The memory stored value will be
printed together with the analysis.
7.3.1
Pressure/Draft external probe (option for Uni)
The pressure/Draft external sensor (BB830025) is a unique vacuum meter with higher both precision and resolution
compared to the internal sensor. This sensor allows you to make measurements in accordance with the UNI10845. For
measuring follow these steps:
•
Connect the sensor to the instrument with the supplied connection cable (see the figure below) and the plug on its
right side. Select the "DRAFT" option by pressing the "DRAFT" key on the keyboard and select the external sensor
as shown on the paragraph 7.3
•
Put
the
sensor
on the boiler surface in a very stable position using its magnet
•
Put the probe connected to the sensor to a very similar height compared to the sensor height using the magnet on
the probe cone as shown on the figure below.
•
Make the Zero by pressing [
ZERO
] (F1)
ATTENTION:
BE SURE THAT THE TWO ELEMENTS
,
SENSOR AND PROBE
,
ARE FIXED AND IN VERTICAL POSITION
.
•
Put the probe into the chimney hole avoiding to move the Pa sensor module and fix it in the center of the chimney
•
Make the measurement (see par. 7.3) If you store the measured value by pressing the [
ENTER
] key, it will be printed
on the test report.
probe
Pa Sensor
Connession
cable
Magnets
Boiler
•
Press
[
ESCAPE
] (F2) to exit and to return to the analysis page.
7.3.2
Burner Pressure Measurement
Using the burner pressure probe (cat. EE300088), it is possible to measure the pressure on the burner. Connect the
probe to the instrument pressure input and connect to the burner plug. Follow the procedure described in paragraph 8.4
to read the pressure.
7.4 Smoke
Measurement
To avoid condensation inside the smoke pump, it should aspirate ambient air before the gas sample. This can be
obtained aspirating the air by the fireside (not in the exhaust gas connection pipe) without using the paper filter.
Introduce now the filter in the pump. The gas sample should be drawn to the center of the combustion gas flux. The
correct gas volume is sampled with 10 uniform shoots by the pump.
Zero positioning