2102 Wireless Communication Module
Section 3 Preparation and Installation
Note
Always install the Wireless Communication Module on top of the other units.
3.3.1Install 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
•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
•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.
