Campbell Scientific ENC10/12, ENC12/14, ENC14/16, ENC16/18 Enclosures - Manual (Page 26)

ENC10/12, ENC10/12R, ENC12/14, ENC14/16, ENC16/18, PWENC12/14, PWENC14/16, and PWENC16/18
5. When to Replace Desiccant
The humidity indicator card or optional CS210 Humidity Sensor indicate when
the desiccant needs to be replaced.
Because desiccant is inexpensive, Campbell Scientific
recommends replacing desiccant packets once they
become saturated rather than attempting to reactivate the
desiccant. This prevents the possibility of the desiccant
packets exploding during the reactivation process due to
heating the desiccant packets too rapidly. CAUTION
5.1 Humidity Indicator Card
The humidity indicator card has three colored circles that indicate the
percentage of humidity. Desiccant packets inside the enclosure should be
replaced with fresh packets when the upper dot on the indicator begins to turn
pink. The indicator card does not need to be replaced unless the colored circles
overrun.
5.2 Optional CS210 Humidity Sensor
The CS210 Enclosure Humidity Sensor contains an Elan HM2000 series
precision bulkpolymer relative humidity sensor to measure relative humidity
inside an enclosure. When the measurements exceed 35% relative humidity,
replace the desiccant packets. Refer to the CS210 manual for sensor
specifications, installation procedures, and programming information.
6. Resistance to Weathering
Our enclosures are coated to protect them from UV rays and other weathering.
However, the outer surface of enclosures exposed to extreme weather (rain,
wind, and/or UV rays) may erode so that glass fibers become apparent. The
depth of the erosion is superficial and only affects the aesthetic appeal (i.e.,
does not reduce the effectiveness in protecting equipment).
Customers who are worried about weathering can periodically rub the
enclosure with petroleum jelly or a Canuba-based car wax. The appearance of
an enclosure that has already been eroded can be sprayed with clear acrylic
paint or coated with primer and white paint. Follow the procedure provided in
either Section 6.1 or Section 6.2 to ensure proper bonding.
6.1 Clear Acrylic Paint
1. Use a rag and possibly a solvent to clean the outside of the enclosure.
Solvents that can be used include rubbing alcohol, a water solution of
alkaline or caustic salts, domestic cleaning products such as Spic & Span,
aromatic hydrocarbon solvents (benzene, xylene), butyl acetate, and glycol
acetate.
2. If a solvent was used, carefully rinse and dry enclosure.
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