Campbell CMP11-L, Инструкция по эксплуатации

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CMP6-L, CMP11-L, and CMP21-L Pyranometers
8.1 Cleaning Domes
Clean the outer dome at regular intervals (e.g., every week or so). Remove any
accumulated dust, condensation, or ice from the dome and pyranometer body
using a soft cloth dampened with water or alcohol (see FIGURE 8-1).
FIGURE 8-1. Reading is reduced if dome is not dry or clean
8.2 Changing the Desiccant
A desiccant-filled drying cartridge prevents dew from forming on the inner
sides of the domes; Campbell Scientific part number 27052 is the replacement
desiccant for this cartridge. The optional CVF3 Heater/Ventilator Unit is also
available to keep the pyranometer dome free from ice and dew (see Appendix
A,
CVF3 Heater/Ventilator ). In some applications, the CVF3 may also reduce
the deposition of dust on the pyranometer dome, and therefore reduce the
cleaning interval frequency.
The silica gel desiccant granules in the drying cartridge should be orange and
opaque. Replace the desiccant granules when they become translucent
(normally after several months). Refill packs of desiccant are shipped with the
pyranometer and can be purchased from Campbell Scientific. The drying
cartridge uses the content of one refill pack. FIGURE 8-2 shows the
replacement process.
When changing the desiccant, ensure that:
•
The surfaces touching the rubber o-ring are clean. Dirt, in combination
with water, can cause corrosion, harming it.
•
The rubber o-ring is coated with silicon grease or petroleum jelly. The
grease coating improves the o-ring’s seal.
•
The drying cartridge is tightly threaded into the pyranometer’s body.
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