ircon Modline 5, Руководство по эксплуатации

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Sensor Installation
32
Rev. L6 Feb 2017
Modline 5
extreme ambient temperatures and radiated heat are described in Section 8 Applications Guide , page
129.
The POI Power Supply/Signal Termination Box and The Terminal Strip Plate must be re-located to a
location that the ambient temperature is between 0 and 55°C (32 and 130°F).
Lens Protection
Be sure the lens is protected from contamination and is accessible for maintenance. If dust, oil,
vapors, etc. collect on the lens, low temperature indications will result. Use an APA – Air Purge
Accessory to maintain a clean lens. Consider use of a Sensor with the Dirty window if errors caused
by lens contamination can seriously affect the process.
Focal Limits
To permit focusing, the target distance must be within the focal range of the objective lens. Ranges
for the Modline 5 objective lenses are given in Section 3.4
Sensor Optical Characteristics , page 26.
Range limitations for close focus lenses may be encountered with the use of certain mechanical
accessories.
Use of Windows
If it is necessary to view the object through a window, as is the case when the object is being heated
in a vacuum or inert atmosphere, correctly select the window material. The material must have
constant transmission characteristics in the operating wavelength range of the Sensor type being
installed. Information on windows is provided in Section 8
Applications Guide , page 129 of this
manual.
Reflections
Reflections from radiating objects represent a potential source of error in temperature measurement.
The total radiation seen by the Sensor will be a combination of intrinsic, emitted, radiation plus
reflected radiation from a nearby hot object off the target surface.
Examples of interfering sources are hot furnace walls and heating elements that are hotter than or
nearly as hot as the target object.
Most reflection problems can be eliminated by changing the viewing angle or shielding the
reflections. Suggestions for anticipating and eliminating common reflection problems are provided
in Section 8
Applications Guide , page 129.
Indirect Viewing
In some situations, it may be necessary to view the target indirectly by means of a mirror. The
characteristics of the mirror and the positioning of both the Sensor and mirror are critical in this type
of arrangement. Refer to Section 8
Applications Guide , page 129 for more information.
Viewing Angle
Viewing angles are limited in some situations. Guidelines are provided in Section 8 Applications
Guide , page 129.
3.7 Sensor Mechanical Installation
3.7.1 Installation Accessories
The Modline 5 Sensor requires the use if one or more installation accessories to mount, align and aim
the Sensor. The installation accessories also provide for cooling the Sensor and air purging the optics to
keep them free from contamination.