GHM Delta OHM LPPIRG01, Operating Manual, Page: 6 / 26

LPPIRG01
- 6 -
V2.1
3 INSTALLATION
Before installing the pyrgeometer, refill the cartridge containing silica-gel crystals. Sil-
ica-gel absorbs humidity inside the instrument and prevents, in particular climatic con-
ditions, condensation on the internal surface of the silicon window and measurement
alteration.
Do not touch the silica gel crystals with your hands while refilling the cartridge. Carry
out the following instructions in an environment as drier as possible:
1.
Loosen the three screws that fix the white shade disk.
2. Unscrew the silica gel cartridge using a coin.
3. Remove the cartridge perforated cap.
4. Open the sachet containing silica gel (supplied with the pyrgeometer).
5. Fill the cartridge with the silica gel crystals.
6. Close the cartridge with its own cap, paying attention that the sealing O-ring be
properly positioned.
7. Screw the cartridge to the pyrgeometer body using a coin.
8. Check that the cartridge is screwed tightly (if not, silica gel life will be reduced).
9. Position the shade disk and screw it with the screws.
10. The pyrgeometer is ready for use.
The figure below shows the operations necessary to fill the cartridge with the silica gel
crystals.
Fig. 3.1: filling the silica-gel cartridge
Silica-gel
cartridge
Perforated cap
Sealed sachet
of silica-gel crystals
Filling
Closing the cartridge