GasSecure GS01
Hardware Manual
10
C
HAPTER
2
2.3
Grounding
The detector housing must be connected to ground for operation in hazardous
areas. This to avoid possible static charge build-up, which may arise from
electrically isolated metal parts. Ground the detector either by mounting it on a
grounded metallic structure or by connecting a grounded wire to the screw holes in
the mounting bracket (cf. Figure 2-1).The resistance to ground must be less than
1 GOhm.
2.4
Sun shade / weather protection
The sunshade is available as optional accessory and recommended for locations
with high ambient temperature and / or direct sunlight exposure. It may also be
used as weather protection for instance in locations with frequent heavy
precipitation. The shade is fixed to the gas detector bracket with the same M8 (or
5/16”) bolts, which are used for detector mounting. Make sure that the sunshade
is mounted the correct way so that the detector identification plate remains visible.
Figure 2-1: Correct position of the weather cap and location of earth point.
The arrow must always point up regardless of the detector orientation.
2.5
External antenna (applies only for GS01-EA)
The external antenna is connected to the detector with the antenna cable as
shown in Figure 2-2. The properties of the antenna cable supplied by GasSecure
are shown in Table 2-1. The GS01-EA detector is certified with the coaxial cable
and the omni-directional antenna in Table 5-1. Note that the approved cable
length range is 0-30 m. Do not connect any other antennas than those listed in
Table 5-1.
The external antenna is delivered with a bracket (refer to Reference [10] for
bracket dimensions) and metal bands for easy fitting to a pole (25 – 101 mm) or
External
earth point