57
Models FL3100H/3101H
10.0 Appendix
10.1 Warranty
General Monitors warrants the Models FL3100H and FL3101H to be free from defects in
workmanship or material under normal use and service within two years from the date of
shipment.
General Monitors will repair or replace without charge any such equipment found to be
defective during the warranty period. Full determination of the nature of, and responsibility for,
defective or damaged equipment will be made by General Monitors’ personnel.
Defective or damaged equipment must be shipped to General Monitors’ plant or representative
from which the original shipment was made. In all cases this warranty is limited to the cost of
the equipment supplied by General Monitors. The customer will assume all liability for the
misuse of this equipment by its employees or other personnel.
All warranties are contingent upon proper use in the application for which the product was
intended and does not cover products which have been modified or repaired without General
Monitors’ approval, or which have been subjected to neglect, accident, improper installation or
application, or on which the original identification marks have been removed or altered.
Except for the express warranty stated above, General Monitors disclaims all warranties with
regard to the products sold, including all implied warranties of merchantability and fitness and
the express warranties stated herein are in lieu of all obligations or liabilities on the part of
General Monitors for damages including, but not limited to, consequential damages arising out
of, or in connection with, the performance of the product.
10.2 Principle of Operation
10.2.1 UV Detector - FL3100H & FL3101H
The Model FL3101H is a flame detector, which contains an ultraviolet phototube that responds
to ultraviolet (UV) radiation in the 185 to 260 nanometer region (Figure 23). When radiation
from a flame reaches the cathode plate within the UV detector tube, electrons are ejected from
the cathode plate. These electrons are accelerated towards the positively charged anode of the
tube. They collide with molecules of an ionizable gas, with which the tube is filled. This emits
more electrons and produces an avalanche condition. More electrons are released which
creates a momentary electron flow from the cathode to the anode. This momentary current
(pulse) recurs at a rate proportional to the intensity of the UV radiation.
The Model FL3101H UV Flame Detector processes these UV pulses with a microcomputer and
produces the following outputs:
4 to 20 mA signal
Immediate WARN relay contacts
Time delayed ALARM relay contacts
FAULT relay contacts
Summary of Contents for FL3101H
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Page 70: ...63 Models FL3100H 3101H 10 7 Final Assembly Figure 24 P N 71450 FL3100H UV IR Final Assembly ...
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