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Accessories
The IR beam length within the right angle mirror is 18 mm (0.7 in.) which needs to be considered for
spot size calculations.
10.2.6 Protective Windows
Protective windows can be used to protect the sensing head from dust and other contamination.
The protective window can be directly screwed onto the sensing head. It has an outer diameter of
17 mm (0.67 in).
The following table provides an overview of the available windows.
Order number
XXXMIACPW
XXXMI3ACPWP
For correct temperature readings, the transmission of the protective window must be set
via the control panel in the communication box. See section 8.2
Make sure the measuring head and the protection window are at the same temperature!
10.2.7 Close Focus Lens
The close focus lens is designed to get very small measurement spots down to 0.5 mm (0.02 in). The
lens should be used for LT models only.
The close focus lens has an outer diameter of 17 mm (0.67 in) and can be directly screwed onto the
sensing head.
Order number
XXXMI3ACCFL
76
Material
holder: stainless steel
window: Zinc Sulfide
(visually transparent, flat)
holder: stainless steel
window: Polymer
(milky transparent, flat)
Table 6: Available Protective Windows
Figure 65: Protective Window
Material
holder: stainless steel
window: Silicon
(visually opaque, curved)
Table 7: Close Focus Lens
Rev. G Nov/2015
Transmission
0.75 ±0.05
180°C (356°F)
(for LT, G5 models)
0.7 ±0.02
65°C (149°F)
(LT models only)
<Head>
Transmission
T
ambient
0.75 ±0.05
180°C (356°F)
(for LT models)
T
ambient
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MI3
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Questions and answers
I am currently installing 4 modules, each with 2 of the Raytek MI3 units. 7 of the units arrived with the normal display (Bottom Unit in photo), but 1 has only a full white block in the display. Is this indicative of a failed unit, or would this require external adjustments. These units always work when received, so I am unfamiliar with the required troubleshooting.