Technical Description
TM888300 Rev. (Al), August 2019
25
3.6.1
UV Source Unit
The UV source unit emits UV radiation pulses at the rate of 1 pulse per second.
The pulse width (5
–
10µsec) is very powerful. The front of the SafEye Source has
an internal reflector that collimates the UV beam for maximum intensity. The
front window is heated to improve performance in ice, condensation, and snow
conditions.
There are 3 source types:
•
For short range
–
951/961
–
Source P/N QTU-X-11X
•
For medium range
–
952/962
–
Source P/N QTU-X-21X
•
For long range
–
953/963
–
Source P/N QTU-X-31X
1
Front window section
7
Earth terminal
2
Label
8
Front window
3
Main housing
9
Cable inlet
4
Mounting plate
10
Indicator LED
5
Junction box
11
Shield
6
Back cover
Figure 3: UV Source
The sources for models 951, 952, and 953 are the same electronically and
optically. The only distinction between them is that each detector apparatus is
suitable for a different distance.
3.6.2
Detector Unit
The detector receives the transmitted pulsed radiation signals from the UV
source. The signals are then amplified and fed into an analog
–
to-digital signal
converter to be processed by the internal microprocessor. When the signals drop
below a prescribed level, the internal microprocessor compensates for them. This