5. POSITIONING AND OPERATING
5.1 POSITIONING AND OPERATING
The installation of the TC probe is done by fixing the BS40 flange
to the duct to be monitored.
The BS40 flange, in AISI304 material, should be fixed in a part of
the duct where isokinetic conditions happen.
The above condition, as a general rule, is placed at a distance of
6÷10 times from the diameter of the duct from the nearer bend
from the side of the origin of the gases.
In this area, the components of turbulence in the gases present
inside the duct are practically unimportant.
This condition is essential for the correct functioning of the
monitoring and the reliability of the registered data.
It is suitable to install the probe with a slight bent downwards
(head of the probe slightly upward compared to the end of the
metallic pole) so that possible drops of condensation that can
appear on the sensitive part of the probe can slip into the duct.
5.2 HOLE FOR CALIBRATION
For the next calibration for the simulation of the TC probe, it is
necessary to provide for a hole with its plug in order to allow the
introduction of dust. This hole should be positioned in vertical
line duct under the TC probe at a certain distance to assure
isokinetic conditions in the point of measurement (see next
picture A).
5.3 FASTENING
The standard BS40 flange is a muff male thread of 1¼ GAS with 35 mm
hole.
BS40 is fixed to the duct by means of a welding on the same axis where
the 35mm hole has been made. See the picture.
When the fixing operation of the probe is finished, introduce the TC probe.
The probe is fixed by closing the dice of 1¼ GAS.
In case of high temperatures, consider longer flanges (see the picture)
5.4 DUCT GROUNDING
For a correct functioning of the probe it is essential that the sampling duct
is connected to the ground.
5.5 MAINTENANCE
The TC probe does not require a particular maintenance.
Could be necessary polish up with a rag soaked of detergent (alcohol,
gasoline etc.) the sensitive part of the probe (inside pole) without
particular precautions.
The necessity to clean the probe should be checked after any months of
operation, checking that possible deposits have provoked alterations to
the operation of the probe.
Wrench 46 to tighten the 1 ¼ GAS sleeve nut
BS40
1¼ GAS male threaded sleeve welded to the duct
BS200 and BS400 available upon request
Pg. 3