BFI Automation 2.0L, Original Operating Instructions

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Transport, installation and connection
4-6
The best setting results when a large visual field is
achieved.
Danger of injuring the eyes by infrared and ultravio-
let radiation 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
vertical 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 di-
ameters 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 recom-
mended.
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" !