BFI Automation CFC 2000L, Оригинальная инструкция по эксплуатации

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Transport, Installation and Connection
4-6
Recommendation:
For adjustment, use the optical adjustment aid (available
as an option) as shown in the figure below. The best set-
ting is obtained when a large visual field is achieved.
correct incorrect
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 re-
striction of the visual range, the maximum length L of a
sighting tube for conventional tube diameters D is as fol-
lows:
D: 1“ 1.5“ 2“
L
(SI [m])
: 0.5 0.8 1.1
L
(US [ft])
: 1.64 2.62 3.60
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 (1.64 ft). When doubling the length,
double the diameter to 2" !