BFI Automation 2.0GT, Original Operating Instructions

Page: 30 / 48

Transport, installation and connection
4-4
The best setting results when a large visual field is
achieved.
Danger of injuring the eyes by infrared and ultraviolet ra-
diation and penetrating gases when checking the flame
visually !
Wear filtering protective glasses !
Vision images of the optical adjustment device
correct wrong
The images appear mirror inverted in horizontal and verti-
cal direction !
The length and the diameter of the sighting tube have a
direct influence on the usable flame radiation as the visual
angle of the lens system is defined. Without restriction of
the visual range, the maximum length L of a sighting tube
for conventional tube diameters D is as follows:
D: 1“ 1.5“ 2“
L: 0.5 m 0.8 m 1.1 m
For this reason, the sighting tube should always be as
short as possible. A diameter of 2" is recommended.
At a diameter of 1", the sighting tube should not be any
longer than 50 cm. When doubling the length, double the
diameter to 2" !