Leica Zeno GG04 plus, Руководство пользователя

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Suggestion for design of a lightning conductor for a GNSS system:
1
.
On non-metallic structures
Protection by air terminals is recommended. An air terminal is a pointed
solid or tubular rod of conducting material with proper mounting and con-
nection to a conductor. The position of four air terminals can be uniformly
distributed around the antenna at a distance equal to the height of the air
terminal.
The air terminal diameter should be 12 mm for copper or 15 mm for alumi-
nium. The height of the air terminals should be 25 cm to 50 cm. All air ter-
minals should be connected to the down conductors. The diameter of the
air terminal should be kept to a minimum to reduce GNSS signal shading.
2
.
On metallic structures
Protection is as described for non-metallic structures, but the air terminals
can be connected directly to the conducting structure without the need for
down conductors.
GS_039
a
b
c a Antenna
b Support structure
c Air terminal
GS_040
e
d
c
a
b
a Antenna
b Lightning conductor array
c Antenna/instrument connec-
tion
d Metallic mast
e Connection to earth
1.6 Electromagnetic Compatibility EMC
The term Electromagnetic Compatibility is taken to mean the capability of the
product to function smoothly in an environment where electromagnetic radia-
Lightning conductors
Air terminal arrange-
ment, plan view
Grounding the instru-
ment/antenna
Description
Safety Directions 11