LumaSense Technologies IGA 740 - Manual (Page 12)

Technical Description
8 KLEIBER 740
4 Technical Description
4.1 System Design/Principle of Operation
Fig. 1 shows the basic structure of the pyrometer. The basic parts of a pyrometer are the
lens, aperture, filter detector, and the signal processing unit. The infrared radiation coming
in from the object to be measured is gathered by the lens. The aperture blocks unwanted
rays at the edges. The filter permits only the desired spectral range to enter. The rays then
pass through to the detector which transforms the infrared radiation into electric signals.
These signals are then linearised in the signal processing unit and changed into a standard
output signal which can then be read in the display, and be used for process control.
The operating elements as well as the connections/interfaces are located at the back of the
pyrometer (see pages 10 to Fehler! Textmarke nicht definiert.).
The coolant connections are located under the instrument.
Fig. 1 Structure of the pyrometer
4.1.1 Optics
Depending on the application (measuring distance, measuring field diameter, etc.), the
pyrometer is equipped with a vario-optic or a macro-optic.
Vario optics
The Vario optic can be adjusted to the required measuring distance and allows small
measuring fields for various distances to the object being measured. The object being
measured can be at an arbitrary distance, but must be at least as large as the measuring
field at that distance (see section 7.1).