Lightning Protection - Geokon GeoNet 8900 Series Instruction Manual

All data is retained in nonvolatile flash memory. Data will not be lost even if the
batteries are removed for an extended period (e.g., years).
REPLACE THE BATTERIES AS FOLLOWS:
1. Place the network in deployment mode by pressing the status button on the
gateway. Within six minutes the green LED will begin flashing every 10
seconds.
2. Open the logger by unscrewing the four captive screws on the front of the
enclosure. Make sure that no dirt, water or other contaminants are allowed
to enter the enclosure.
3. Set the battery select switch to the OFF (middle) position.
4. Remove the existing batteries, if installed.
5. Install the batteries by aligning the positive (+) side of the D cells with the
(+) indicator in the battery holder. Push the batteries straight down into the
holder.
6. For Move the battery select switch to either the Alkaline or Lithium position
depending on the type of battery being used. An LED will flash on the right
side of the box indicating the unit has power. Once the logger reconnects to
the network, the green LED will blink every 10 seconds in unison with the
LED on the gateway.
Note: If replacing the batteries in a network gateway and power is restored
promptly, the gateway will remain active. If power is not restored promptly
the network time will be lost and must be reset using the Agent software.
The loggers within the network will reconnect automatically.

4.4 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 device 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 device (if equipped) with a 12 AWG or larger
wire. This will provide a path from the device to earth ground in the event of a
lightning strike.
MODEL 8900 SERIES GEONET WIRELESS DATA HOSTING SYSTEM | MAINTENANCE | 25