AST 450 G-2 User Manual

4
Accurate Sensors Technologies
AST
2.4 Optics
The heat radiation from target object is received by the pyrometer via the lens and is then converted to
an electrical signal. The measured object may be at any distance from the pyrometer. However, the farther the
measured object is from the pyrometer, the larger the area that will be measured by the pyrometer.
The following drawing shows the optical head spot sizes and the focus distances in relation to distance
from the optical head.
2.5 Fiber optic
The infrared radiation is transmitted from the optics to the signal processor by a fiber optics cable. Fiber
& optical head can withstand ambient temperatures up to 250°C .The optical head carry only the objective lens,
the signal processor has radiation detector and signal processing circuit.
The transmission of signal is totally loss free because a reflecting coating is provided at the inner
surface of the optic cable. Standard length of FOC with pyrometer is 5mtr.
Minimum bending radius:
Momentary, localized (max.250°C) : 30mm
Long term (max.250°C) : 50mm
In coiled condition (max.250°C) : 50mm
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Spot Size M (mm)
Distance a (mm)
300
600
1000
1500
2000
3000
5000
11
13
16
18
22
27
50

AST 450 G-2 Specifications

General

Brand	AST
Model	450 G-2
Category	Measuring Instruments
Language	English