GHM Delta OHM LPPYRA03, Руководство по эксплуатации

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LPPYRA03
- 5 -
V2.8
3 INSTALLATION
•
The pyranometer must be mounted in an easy-to-reach location in order to clean
the dome regularly and carry out maintenance. At the same time, make sure that
no buildings, constructions, trees or obstructions exceed the horizontal plane where
the pyranometer lies. If this is not possible, select a site where obstructions in the
path of the sun from sunrise to sunset do not exceed 5 degrees of elevation.
N.B.:
The presence of obstructions on the horizon line affects significantly the
measurement of direct irradiance.
•
The pyranometer must be located far from any kind of obstruction, which might re-
flect sunlight (or sun shadow) onto the pyranometer itself.
•
In compliance with ISO TR9901 standard and WMO recommendations, when the
pyranometer is used without the optional shade disk, it must be positioned so that
its connector is pointed to the North Pole, if the instrument is used in the Northern
Hemisphere, and to the South Pole, if used in the Southern Hemisphere. In any
case, it is better to follow this suggestion even when the shade disk is applied.
•
For fixing, use the holes on the pyranometer body or the suitable accessories (see
the figures below). In order to allow an accurate horizontal positioning, the pyra-
nometer is equipped with a levelling device. The mast height does not exceed the
pyranometer plane to avoid measurement errors caused by any reflection or shad-
ow of the mast itself.
•
It is preferably to thermally insulate the pyranometer from its mounting bracket
ensuring, at the same time, a good electrical contact to ground.
61 mm 83 mm
LPPYRA03AC
LPPYRA03AV
LPPYRA03[AC]S
LPPYRA03S12
LPPYRA03
59 mm
46 mm
32 mm
24 mm
M4
32 mm
Fig. 3.1: fixing holes
M5 fixing hole
Fixing hole
for LP SP2