Installation; Lightning Protection; Connecting To The Network; Figure 15: Eight Channel Node Interior - Geokon GeoNet 8800 Series Instruction Manual

15:
FIGURE 15: Eight Channel Node Interior (8800-XX-08C-CBL)

2.3 INSTALLATION

Multi-channel sensor nodes function in the same manner as other nodes, and
can be installed using Section 3.
To determine the correct wiring for instruments with multiple vibrating
GEOKON
wire gauges, refer to the wiring chart(s) in the manual provided with the
instrument. These types of instruments will require the use of more than one
channel in the MCN.
Supervisors, single channel nodes, and addressable nodes must be grounded
through the mounting hardware for maximum protection.

2.4 LIGHTNING PROTECTION

Each vibrating wire (VW) channel is protected by a 230V gas discharge tube,
followed by a high-speed surge protector and a transient voltage suppression
diode. Each thermistor (TH) channel is protected by a 230V gas discharge tube,
followed by an inductor (lower resistance than high-speed surge protectors) and
a transient voltage suppression diode.
For these components to safely divert lightning energy to ground, a solid
electrical connection to earth ground is required. A copper grounding rod at
least six feet in length should be driven into the soil to a minimum depth of three
feet, as close to the MCN as possible. Alternatively, any other suitable earth
ground attachment may be used. Connect the grounding rod to the copper
grounding lug on the exterior of the MCN with a 12 AWG or larger wire. This will
provide a path from the MCN to earth ground in the event of a lightning strike.

2.5 CONNECTING TO THE NETWORK

An MCN can be added to a network at any time; it will be detected and used
automatically if the network is already in deployment mode.
Note: recommends that you connect sensors to the MCN before
GEOKON
connecting the node to the network.
MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | ADDRESSABLE AND MULTI-SENSOR NODES | 11