Technical Description; System Design / Principle Of Operation; Optics; Vario Optics - KLEIBER KG 740 - LO Betriebsanleitung

5 Technical Description

5 Technical Description

5.1 System Design / Principle of Operation

Figure 2 shows the basic structure of the pyrometer with fiber optics and optical fiber. The infrared radiation
coming from the object is collected and focused by a fiber optics, that main parts are a lens and an aperture.
Via a optical fiber the infrared radiation is transmitted to 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 optical fiber 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
Operating elements and cable connections (section 5.3) at page 12).
Measuring object Fiber optics Lens Aperture Optical fiber Lens Pilotlight Filter Detector Signal processing unit Pyrometer
Figure 2: Structure of the pyrometer

5.2 Optics

5.2.1 Vario optics

The vario optics 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 Setting the vario fiber optics (section
5.2.3) at page 11).
Optical fiber Ring nut Housing
Minimum
measuring distance
Length L Maximum measuring distance
Figure 3: Vario optics

5.2.2 Fixed optics

The fixed optics is a fixed optics for very small measuring fields, i.e. a certain measuring field diameter is given
for a certain measuring distance.
10 KS / KG / KGA 740 - LO