7 Operation of the pyrometer
7
Operation of the pyrometer
7.1
Setting the optic
Please make sure which optic your pyrometer works with. The fixed optic has to be installed at the given
measuring distance to ensure the small measuring field. For the vario optic please adjust the necessary
measuring distance as follows:
1. Loosen the ring nut by turning it in a counter-clockwise direction.
2. Move the vario optic forwards and/or backwards, in order to adjust the pyrometer to the required measur-
ing distance. Mentioned distances in the data sheet are essential to be maintained.
3. After adjusting the measuring distance, lock the annular nut by turning it in a clockwise direction.
X
The optical head is thus adjusted to the required measuring distance.
Figure 6: Setting the vario optic head
Example (LVO 25)
a
a
in mm
80
100
120
140
160
180
200
220
240
260
280
300
M
b
in mm
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.1
3.4
3.7
4.0
4.3
L
c
in mm
63.2
60.0
58.1
56.2
55.4
54.6
54.0
53.6
53.1
52.7
52.4
52.1
a
Measuring distance
b
Measuring fielddiameter
c
Length
7.2
Adjusting the emissivity
The emissivity is the relationship between infrared energy radiated from an object and the radiation energy of
a perfect emitter (black emitter) at the same temperature and the same spectral range.
The emissivity is material-dependent and of a considerable size in order to be able to determine the temper-
ature of an object accurately without contact. The emissivity of the object being measured must therefore be
known and be adjusted at the pyrometer.
Typical emissivities for various materials are available on our homepage at www.kleiberinfrared.com or in rele-
vant literature.
The instrument is calibrated at black body radiation (
𝜀
= 1,00). Real objects have an emissivity less than
𝜀
=
1.00. This difference can be adjusted with changing the emissivity value from the pyrometer.
KLEIBER 217 R - LWL
13
