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Lumidigm M-Series M3xx Modules Mechanical Integration Guide, PLT-02217, Rev. A.0
4 Environmental Considerations
Previous sections provided mounting approaches that result in an IP65-rated seal where
the M3xx platen area meets the external environment. This section provides additional
design guidance for engineers responsible for designing an outdoor enclosure containing
the M3xx.
Disclaimer - The information provided in this section is for design guidance only and is
provided "as-is" with no warranties.
Disclaimer - Lumidigm Inc. warrants that the M3xx module will meet all its specifications
when operated within the specified operating conditions. If the unit is operated outside
these conditions this warranty is voided.
Assumption - An enclosure containing an M3xx will have electronics and perhaps an
exposed display screen. In this design guide we assume that M3xx specifications are
representative of the other enclosure components.
4.1
Summary of Environmental Considerations
The entire enclosure should be sealed from liquid water and dust intrusion to IP65. It should
restrict water vapor transfer.
A desiccant should be included in the interior of the enclosure to remove most of the water
vapor present during manufacture.
Irrespective of human comfort factors, the enclosure air temperature should be controlled
when the external operating temperature is < 0°C.
If no supplemental platen heating is used, the enclosure interior air temperature should be
kept > 0°C.
The combination of interior heating and platen heating must insure that the interior platen
surface remains greater than the dew point of the enclosure air mass.
The M3xx senor head should not be sealed and should instead remain exposed to the
interior air mass of the enclosure.
The enclosure and/or placement of the enclosure should provide shading features for the
platen area to prevent direct sun exposure.
December 2014
Page 20 of 28
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