Teledyne WIRELESS COMMUNICATION MODULE 2102 - Manual (Page 22)

2102 Wireless Communication Module
Section 3 Preparation and Installation
3-4
Note
Always install the Wireless Communication Module on top of
the other units.
3.3.1 Install the modules The modules should be secured at the site. This prevents damage
caused by accidental falls and from being swept away if the
channel is flooded. In manholes, the modules are often secured to
a ladder rung, or suspended from a spreader bar. Teledyne
Teledyne Isco’s Customer Service Department or your local rep-
resentative can assist you with installation options.
Guidelines for the best possibility of successful communications
are:
• Locate the remote unit as high up inside the manhole as
practically possible. The greater the depth of the remote
inside the manhole, the shorter the effective radiating
distance. Also bear in mind that inside a manhole, even
in best-case situations, the unit will still always be
below the surface of the ground and under an iron cover
as well.
• Locate the vehicle that contains the base unit as close to
the manhole as is safe and reasonable. If possible, for
safety reasons, park along the curb, or off-street in a
parking lot. Try to park so that there is a clear line of
sight through the windshield of the vehicle to the
manhole containing the remote unit. Any obstruction
between the manhole and the receiver reduces the
chances for successful communications.
• Place the base unit on the dashboard of the vehicle. The
radiated energy from the remote unit passes more
readily through glass than through the body of a vehicle.
• Suspend the remote unit inside the manhole so the front
of the unit faces the center of the manhole; again this
optimizes radiation patterns.
As you complete the installation, the following should be checked
before leaving the site unattended:
• Make sure the module is on the top rung of the manhole
or as close as possible to the surface. Signal trans-
mission will be impaired substantially the deeper the
module is mounted in the manhole.
• Make sure the manhole cover is fully replaced and
secure.