IS 12-TSP / IGA 12-TSP Manual
Controls and Installation
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16
3.4
Mechanical installation
For correct temperature determination of a calibration source, the pyrometer must be aligned
centrally and along the optical axis of the respective radiation source. For reasons of different
sizes and construction types of calibration sources, the installation brackets from the LumaSense
accessories are suitable to only a limited extent for these wide-ranging requirements. You must
therefore purchase or build a suitable alignment aid yourself. The pyrometer is fitted with
M5 diameter holes on the front face and bottom for fixing as required.
Installation note:
Strong incidence of daylight or lamp light into the view finder can
affect the measurement. In this case the ocular has to be covered.
3.4.1
Aligning of the pyrometer to the aperture
Installation note:
The information contained in VDI/VDE (German Electrical
Engineering Association) Directive 3511, Sheet 4 and supplementary sheet 4.4 must be
observed when calibrated pyrometers and when correctly carrying out temperature
measurements.
The following points must also be observed in the special case of the TSP device:
3.4.2
Special aligning notes
•
The size of the spot size is determined first and foremost by the distance of the
pyrometer from the radiator in addition to the optical equipment fitted to the
pyrometer (see measure field table in
3.6, Optics
).
•
The pyrometer’s spot size should be selected so that the temperature is only received
from the floor of the radiator opening, since the emissivity is normally high and
homogenous in this location but normally declines along the wall and towards the
opening.
•
The pyrometer should not be positioned so close to the radiator that it is heated by this
to above its maximum permissible ambient temperature.
•
If the selected pyrometer measured field is very small, the temperature display can
change due to possible non-homogenous radiator surfaces when aligning the pyrometer
(this is especially noticed on radiators of not particularly high quality).
•
In typical cases, the optical focus point is adjusted at the height of the radiator front. To
achieve a smaller or larger measured field, the focus point can be adjusted in front or
behind this location.
Radiator front
Measured distance
Optics
Course of radiation
