Kipp&Zonen CM 4 Pyranometer - Manual (Page 30)

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5 MAINTENANCE
Once installed the pyranometer needs little maintenance. The
pyranometer dome must be kept clean and inspected regularly.
Ensure that the silica gel is still coloured orange. When the orange
silica gel in the drying cartridge is turned completely transparent
(normally after several months), it must be replaced by active silicagel
as supplied in the small refill packs. The content of one pack is
sufficient for one complete refill.
In humid areas it is usual to replace the desiccant twice a year.
The replacement interval is affected by humidity, variations in air
pressure and the extent of temperature changes.
Some tips when changing the desiccant:
-
Do not remove the desiccant cartridge unnecessarily.
- Dirt in combination with water is the main cause of corrosion.
Make sure the surfaces of the pyranometer and the cartridge
that touch the rubber sealing ring are clean.
- For a better seal, the rubber ring is normally coated with
silicon grease (Vaseline can also be used). If the rubber ring
looks dry apply some grease to it.
5. MAINTENANCE