Leica Geosystems Leica mojoXact Plus - Manual (Page 141)

Leica mojoXact Plus, Safety Directions 141
ƽ
WARNING While steering or navigating the vehicle accidents may occur due to a) the operator
not paying attention to the surroundings (persons, ditches, traffic, etc), or b)
malfunctions (… of a system component, interference, etc.).
Precautions:
The operator ensures that the vehicle is operated, guided and monitored by a quali-
fied user (e.g., a licensed driver). The user has to be able to take emergency meas-
ures, for example an emergency stop.
ƽ
DANGER If the product is used with accessories, for example, masts, staffs, or poles, you may
increase the risk of being struck by lightning. Danger from high voltages also exists
near power lines. Lightning, voltage peaks, or the touching of power lines can cause
damage, injury and death.
Precautions:
•
Do not use the product in a thunderstorm as you may increase the risk of being
struck by lightning.
• Be sure to remain at a safe distance from electrical installations. Do not use the
product directly under or in close proximity to power lines. If it is essential to
work in such an environment contact the safety authorities responsible for elec-
trical installations and follow their instructions.
• To prevent damage due to indirect lightning strikes (voltage spikes), cables, for
example for the antenna, power source or modem, should be protected with
appropriate protection elements, like a lightning arrester. These installations
must be carried out by an authorized specialist.
• If there is a risk of a thunderstorm, or if the equipment is to remain unused and
unattended for a long period, protect your product additionally by unplugging all
systems components and disconnecting all connecting cables and supply cables.
• If the product has to be permanently mounted in an exposed location, it is advis-
able to provide a lightning conductor system. A suggestion on how to design a
lightning conductor for the product is given below. Always follow the regulations
in force in your country regarding grounding antennas and masts. These instal-
lations must be carried out by an authorized specialist.
Lightning Conductors
The following are suggested designs of lightning conductors 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 connection to a
conductor. The position of four air terminals should 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 aluminium. The
height of the air terminals should be 25 cm to 50 cm. All air terminals 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.