Maintenance Handbook

SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 2: Health and Safety Warnings
KH-1601-2 Issue 6
Page 6 of 80
RADIATION HAZARDS
WARNING: RADIATION HAZARD- NON-IONISING
Avoid exposure to the main beam of a stationary radar antenna.
Avoid standing closer than 2 metres from the central front face of the antenna.
Users of cardiac pacemakers should be aware of the possibility that radio frequency transmissions can damage some devices
or cause irregularities in their operation. Anyone using such devices should understand the risks present before exposure.
WARNING: RF LEAKAGE
Radiation risks are greater from an unterminated, leaky or damaged waveguide. Ensure the system is not transmitting and is
fully isolated from all sources of AC power prior to gaining access to the transceiver platform or before working on any part of
the system.
MICROWAVE RADIATION LEVELS
The antenna safe distance for all SBS-800 systems is close to the antenna turning circle, although KH do not recommend any
personnel to be in close proximity to a rotating antenna due to not only the RF exposure but also the high risk of injury that can
be caused by a rotating antenna.
The range at which specified RF exposure limits can be exceeded is far greater for a non-rotating antenna. For that reason, RF
transmission without antenna rotation is not a permitted operational mode for this equipment: The system includes interlocks to
prevent this occurring.
The basic restriction level for the operating frequency of this product, as set out in 1999/519/EC (Annex III Table 2) and
calculated in accordance with EN50385:2002. For normal operation, averaged over a six minute period, the EU basic restriction
level for public exposure is only exceeded within range limits of the antenna centre as shown in the table below:
SBS-800 Antenna
Antenna State
Range limit 10W/m
2
Range limit 50W/m
2
800-1
X-Band 3.7m antenna
Rotating
1.8m
0.8m
Non-rotating
9.8m
1.8m
800-2
X-Band 5.5m antenna
Rotating
1.8m
0.8m
Non-rotating
6.3m
1.1m
800-3 (FD)
X-Band 5.5m antenna
Rotating
1.8m
0.8m
Non-rotating
6.3m
1.1m
800-51
S-Band 3.9m antenna
Rotating
1.3m
0.6m
Non-rotating
4.1m
0.4m
Two field strength thresholds are considered relevant to the current legislation. The 10W/m
2
limit is the reference level for
general public exposure – Council Recommendation 1999/519/EC Annex III Table 2. The 50W/m
2
limit is the occupational limit
recommended in the ICNIRP guidelines published in 1998 and 2009. Different countries or regions may use different levels, so
it is the responsibility of the system integrator and the system administrators to ensure that applicable limits are identified and
that the equipment installation recognises and mitigates against the non-ionising radiation risks associated with the installation
and operational use of radars.
In all SharpEye™ systems, the fault condition following the loss of Heading Line and Azimuth data (e.g. the antenna has
stopped rotating) is recognised to trigger the transceiver OFF condition within a few seconds. During essential update of the
SharpEye™, the Kelvin Hughes Engineer must ensure that Transmission is disabled.