KLEIBER KS 740 Betriebsanleitung Seite 13

5 Technical Description
5.1 System Design / Principle of Operation
Figure 2 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
Operating elements and cable connections (section 5.3) at page 11) .
On the bottom of the pyrometer are the coolant connections and a threaded hole for mounting the pyrometer.
Measuring object
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 measurement object can be at an arbitrary distance, but
must be at least as large as the measuring field at that distance (see Setting the vario optics (section 5.2.3) at
page 10).
Minimum measuring distance
Maximum measuring distance
5.2.2 Macro optics
The macro optics is a fixed optics for very small measuring fields, i.e. a certain measuring field diameter is
given for a certain measuring distance.
KS / KG / KGA 740
Lens
Figure 2: Structure of the pyrometer
Variable length tube extraction (L)
Figure 3: Vario optics
Aperture Pilotlight Filter Detector
5 Technical Description
Signal processing unit Pyrometer
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