IS 12-TSP / IGA 12-TSP Manual
Controls and Installation
•
17
Note:
IMPAC transfer standard pyrometers are fitted with an extremely good optical
system which only receives the minimum radiation quantities outside the measured
beam. For this reason it is not necessary to put an additional aperture in the course of
the beam during measurement which limits the received radiation. This should be
taken into consideration especially for comparative measurements with other
pyrometer types since a high proportion of unwanted additional radiation can be
received under certain conditions depending on the optical system fitted if no aperture
is fitted during measurement.
3.4.3
Instrument settings
•
The pyrometer has been set to an emissivity of 1 ex works. All calibration sources which
have been calibrated with an effective emissivity of 1 will be checked with this setting. In
case that the calibration source has to be checked with its true emissivity, the
corresponding value can be set at the pyrometer (see
4.2
,
Instrument settings
).
•
The exposure time is set to 1 sec ex works. This is the standard setting for TS pyrometers
which is achieved with maximum precision at minimum noise values. Changing this
setting is only necessary if the pyrometer is to be used for other measuring tasks.
3.5
Sighting
For exact aiming to the object the pyrometers are equipped with a thru-lens view finder and an
additional laser targeting light (exception: the IS 12-TSP with temperature range 850 to 2520 °C
has only a view finder).
3.5.1
Thru-lens view finder
In the optimized thru-lens view finder a circle marks the exact
position and size of the measuring spot. The focusable optics is
correctly adjusted to the required distance, if the measuring object
is shown as a sharp image in the view finder (adjusting the measuring
distance see
3.6, Optics
).
Pyrometers with temperature ranges exceeding 1500 °C are equipped with
an adjustable eye protection filter. Turning the ocular changes the filter
from bright to dark.
3.5.2
Laser targeting light
The laser point marks the center of the spot, not the exact size. On the
focused measuring distance the laser has its smallest spot size and is
illustrated exactly (adjusting the measuring distance see
3.6
,
Optics
).
The laser targeting light can be used without affecting the measurement.
Eye
protection
filter
