(1) Surge protector and case
(1) 9-25 pin RS-232 serial cable
Use the following procedure to install the short haul modems (
1. Connect the 6 m (20 ft) patch cable to the COM connector on the back side of the
enclosure. Splice the patch cable to the user-supplied cable, using the direct burial splice
kits.
NOTE:
The splice and wire nut must be completely immersed into the silicone gel inside the
splice tube to be waterproof.
2. Mount the surge protector box to a flat surface within 1.5 m (5 ft) of the serial port on the
computer. Ground the center terminal to an earth (or building) ground using the 14 AWG
wire.
3. Connect the 1.5 m (5 ft) patch cable from the surge box to the Rad Modem. Fasten the
cable to the strain relief tab with a cable tie. Use the 9-to-25 pin serial cable to connect the
modem to the serial port on the computer.
4. Route the user-supplied cable from the remote splice to the surge protector. Connect it
and the 1.5 m (5 ft) patch cable to the surge protector.
6.7.4 Radio
Radios enable wireless communication between a data logger and computer. Maximum range is
0.8 to 21 km (0.5 to 13 miles). This is determined by radio model, antennas used, line of site, and
interference. This section provides instructions for RF407, RF412, RF422, RF451 and most radios
offered by Campbell Scientific.
NOTE:
AC power is recommended when using radios with the station. A 10-watt solar panel can be
used but days without sunlight and winter months with little sunlight should be considered.
The T107 station comes with a 7 amp-hour battery that is NOT designed to handle deep
discharge. Discharging the battery below 11 VDC may require battery replacement. Below are
some examples of power calculations. Battery current consumption is based on discharging
the 7 amp-hour battery to 80% capacity (5.6 amp-hours). Discharging the battery past this
value could result in damaging the battery.
Section 6. Installation
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