IMPAC pyrometers series IN 5 plus
13
6.2
Thermal alignment
When measuring a hot object in front of a cooler background, it usually suffices to align the pyrometer to
achieve the highest temperature reading.
7
Optics
The pyrometers are equipped ex works with one of the following optics. These lenses are focusing to certain
distances. In these distances each lens achieves its smallest spot size. The spot size will enlarge in any
other distance (shorter or longer). Please notice that the measuring object must be as least as big as the
spot size.
The name of the optics (e.g. optics 300) shows the measuring distance in mm (e.g. 300 mm) in which it has
the smallest spot size (IN 5 plus, e.g. 6 mm).
The following drawings show the size of the spots in mm in dependence of the measuring distance. Values
between the mentioned data can be calculated by interpolation. The spot size for measuring distance 0 is the
aperture diameter of the optics.
IN 5 plus, IN 5-H plus
IN 5-L plus
16
36
68
2500
1500
800
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 800
6
22
45
1000
600
300
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 300
2
18
35
300
200
100
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 100
8
28
71
2500
1500
800
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 800
3
15
45
1000
500
300
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 300
1
17
33
300
200
100
0
15
Measuring distance a [mm]
Spot size M [mm]
Optics 100
