OTT ecoLog 500, Руководство по эксплуатации

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7 If required: Connecting an external radio antenna
If the local signal strength of the cellular network prevents transmitting from the
closed observation well, an external radio antenna (accessory) is to be connected
to the OTT ecoLog 500 (3G). In this case, only the dedicated external radio antenna
specified by OTT must be used for this particular application (cable length max.3 m).
You may fasten the external radio antenna to a suitable location using the shim
and nut supplied (drilling a hole for the thread of the external antenna is required:
Ø approx. 18 mm). For this installation, an individual solution to fasten the exter-
nal antenna must be found depending on the station.
If the observation well is closed by a top cap you need to have a hole in the
observation well so that the antenna cable can be routed to the outside (to prevent
rain water from entering into the observation well, it is recommended to place the
hole on the side). If required seal the cable feedthrough.
How to connect an external radio antenna
Depending on the particular local situation (diameter of the observation well, type
of the top cap, and other mounting characteristics), the external radio antenna
must be connected prior to or during installation. Please note the relevant chapters
8.2 through 8.4.
Carefully unscrew the factory mounted antenna by hand.
Route the plug of the antenna cable through a hole in the observation well.
Connect the plug to the antenna socket and hand-tighten the locknut.
Fasten the external radio antenna to a suitable location outside the
observation well.
Note
When installing an external radio antenna, the minimum distance to people
and other electrical equipment or antennae must be at least 20 cm.
Additional accessories for optimizing the radio conditions at the station are
available on request (e.g. plastic top caps, top caps with external or internal
radio antenna).
External radio antenna
Plug of external radio antenna
Antenna socket
Communication
unit
Radio antenna
Fig. 6: Connecting an external
radio antenna.
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