BFI Automation CFC 4000L Original Operating Instructions page 30

Transport, Installation and Connection Transport, Installation and Connection
Recommendation:
For adjustment, use the optical adjustment aid (available For adjustment, use the optical adjustment aid (available
as an option) as shown in the figure below. The best set- as an option) as shown in the figure below. The best se
ting is obtained when a large visual field is achieved. ting is obtained when a large visual field is achieved.
correct
Risk of damage to the eyes from infrared and ultraviolet Risk of damage to the eyes from infrared and ultraviolet
radiation and from escaping gases during visual flame radiation and from escaping gases during visual flame
monitoring!
Wear filtering protective goggles ! Wear filtering protective goggles !
The images appear mirror inverted in The images appear mirror inverted in
horizontal and vertical direction ! horizontal and vertical direction !
The length and the diameter of the sighting tube have a ength and the diameter of the sighting tube have a
direct influence on the analysable flame radiation as the direct influence on the analysable flame radiation as the
visual angle of the lens system is defined. Without re- visual angle of the lens system is defined. Without r
striction of the visual range, the maximum length L of a striction of the visual range, the maximum length L of a
sighting tube for conventional tube diameters D is as fol- sighting tube for conventional tube
lows:
D:
L:
For this reason, the sighting tube should always be as For this reason, the sighting tube should always be as
short as possible. A diameter of 2" is recommended. short as possible. A diameter of 2" is recommended.
At a diameter of 1", the sighting tube should not be any At a diameter of 1", the sighting tube should not be any
longer than 50 cm. When doubling the length, double longer than 50 cm. When do
the diameter to 2" !
4-6
incorrect
1" 1.5"
0.5 m 0.8 m
2"
1.1 m