INFRATHERM pyrometer ISR 50-LO
39
Mounting:
For mounting and aligning the optical head to the
measured object a mounting angle or a ball and
socket mounting is available. The ball and socket
mounting is an easy way to align the pyrometer to
the measured object. The clamping-screws of the
ball and socket mounting enable an easy and fast
adjustment of the pyrometer in all directions.
Mounting angle
Ball and socket mounting
Air purge:
The air purge protects the lens from contamination
with dust and moisture. It has to be supplied with
dry and oil-free pressurized air (1.5 m³ / h) and
generates an air stream shaped like a cone.
Air purge
Displays:
Additionally to the built-in temperature indicator of
the pyrometer IMPAC offers several digital displays
which can also be used for remote parametrizing of
the pyrometer.
Digital display DA 6000
LED large display
7
Optical head
The instrument will be delivered with a HD optical head which is specially designed to connect a HD fibre.
This optic has to be adjusted ex works to the required measuring distance (possible range is 340 …
4500 mm, the measuring distance is always measured from the front of the lens). Only in this distance the
spot sizes mentioned in the table 7.1 will be achieved. A tape can be used to determine the distance be-
tween object and pyrometer. Decreasing or increasing the measuring distance enlarges the spot size. Spot
sizes for intermediate distances, that are not shown on the optical profiles, may be calculated using the
following formula:
Ø M
Ø M
2
Ø M
1
a
a
1
a
2
(
)
D
D
M
a
a
M
2
2
−
+
=
(
)
D
D
M
a
a
M
1
1
+
−
=
adjusted
measuring distance
6 mm
Aperture-Ø D
Note:
In ratio mode the pyrometer can measure objects at any distance, objects can be
smaller or bigger than the spot size in this distance (see 9.6 Switch-off level).
In 1-color mode the pyrometer can measure objects at any distance, but it has to
be at least as big as the spot size of the pyrometer.
7.1
Measuring distance / spot size
Spot size M
90
[mm]
Measuring
distance
a [mm]
700 … 1800°C (MB 18)
(green marked fibre)
800 … 2500°C (MB 25)
(red marked fibre)
1000 … 3000°C (MB 30)
(yellow marked fibre)
Aperture
D [mm]
340
5.1
1.7
0.9
17
600
9
3
1.5
17
1000
15
5
2.5
17
4500
66
22
11
17
M
90
: Spot
size
M
focusing to the measuring distance „a“ for 90% of the radiation.
D
:
The aperture is the effective lens diameter of the optics
