
48
Operating instructions CellaTemp PX 4x 5x 6x
19 Field of view
With a pyrometer with focusable optics, the size of the measurement field is
determined by the distance ratio D� The measurement field diameter d at the focal
distance is defined by the formula:
In case of rectangular measurement fields, the horizontal D
H
and the vertical D
V
distance ratio is indicated�
On our website you will find a measurement field calculator� Select the suitable
pyrometer, enter the measuring distance and the length of the measurement
field and you will get the suitable measurement field course and you can see
the size of the measuring spot at the relevant distance�
https://www.keller.de/en/its/tools/field-of-view-calculator.htm
d
a
D
V
D
H
a