LumaSense Technologies IS 50-LO plus - Manual (Page 17)

IS 50-LO plus / IGA 50-LO plus Manual Controls and Installation 17
Caution: Do not look directly into the laser beam! Laser class 2 according to
IEC 60825-1-3-4
Note: To prevent damage to the laser, the laser targeting light switches off
automatically if the internal temperature of the device goes above approx. 55 °C (then
it cannot be switched on again until the temperature is lower again)!
Note: The laser warning signs on the pyrometer should be easily viewable at all times,
even after it has been installed.
3.4 Optics
Depending on the application the instrument will be delivered with a small or a large optical
head. The selection of the optical head depends not only on its size but also on the required
spot size (size of the measuring object) and the measuring distance.
Optical head
Measuring
distance
a [mm]
Spot size M
90
[mm]
Aperture
D [mm]
IS 50-LO plus
IS 50/055-LO plus
IS 50/067-LO plus
IS 50-Si-LO plus,
MB 16
IGA 50-LO plus
IS 50-Si-LO plus
MB 13
IS 50-AI-LO plus
Type I
(small
optics)
120 1.2 2.2 3.3 7
260 2.6 7.5 7.5 7
700 7.2 14 21 7
Type II
(fixed
adjusted)
87 0.45 0.75 1.1 17
200 0.8 1.5 2.3 17
600 2.7 5.3 8.0 15
4500 22 4.2 63 15
Type II
(focusable)
88 … 110 0.45 … 0.6 0.8 … 1.1 1.2 … 1.7 17
95 … 129 0.5 … 0.75 0.9 … 1.3 1.4 … 2.0 16
105 … 161 0.6 … 1.0 1.1 … 1.7 1.7 … 2.6 15
200 … 346 0.8 … 1.5 1.5 … 2.8 2.3 … 4.2 17
247 … 606 1.1 … 2.7 2.0 … 5.2 3.0 … 7.8 16
340 … 4500 1.5 … 22 2.8 … 42 4.2 … 63 15
Measuring distance from the front of the lens
Spot size M for focusing to the measuring distance a for 90% of the radiation
The aperture is the effective lens diameter of the optics
3.4.1 Calculating spot sizes
Spot sizes for other measuring distances can
be calculated with the following equations
or with the IR calculator of the InfraWin
software.
Table values: a
1
= measuring distance
M
1
= spot size
D = aperture