BFI Automation CFC 2000, Original Operating Instructions

Page: 31 / 56

Transport, Installation and Connection
4-5
Risk of damage to the eyes from infrared and ultraviolet
radiation and from escaping gases during visual flame
monitoring!
Wear filtering protective goggles !
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 analysable flame radiation as the
visual angle of the lens system is defined. Without restric-
tion of the visual range, the maximum length L of a sight-
ing 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" !