Campbell Scientific RF500M Radio Modem - Manual (Page 14)

Section 2. Radiotelemetry Network Components
2-8
2.4 Tripods, Towers, Enclosures, and Power
Supplies
There are several methods of mounting and housing sensors and other
equipment for a station.
2.4.1 Tripods and Towers for Mounting
For the different mounting requirements, Campbell Scientific offers many
styles and sizes of tripods and towers. All mounting options available from
Campbell Scientific are rugged instrument mounts that provide sturdy support
for Campbell Scientific sensors, enclosures, and measurement electronics.
2.4.2 Enclosures
Enclosures are needed to keep water and debris from damaging the data
acquisition equipment. Campbell Scientific, Inc. enclosures are designated as
“rain-tight,” and are designed to mount to a tripod or tower.
The fiberglass enclosures are classified as NEMA 4X (water-tight, dust-tight,
corrosion-resistant, indoor and outdoor use). A 1.25” diameter entry/exit port
is located at the bottom of the enclosure for routing cables and wires. The
enclosure door can be fastened with the clasp for easy access. The enclosure’s
clasp door can be secured with a basic lock. Both enclosures are white for
reflecting solar radiation, reducing the internal temperature.
The model ENC12/14 fiberglass enclosure has inside dimensions of 14" x 12"
x 5.5”, the model ENC14/16 fiberglass enclosure has inside dimensions of 14"
x 16" x 5.5" and the model ENC16/18 fiberglass enclosure has inside
dimensions of 16" x 18” x 8.5".
2.4.3 Power Supply
A radiotelemetry network requires a reliable power supply at each station. A
solar panel or 110/220 VAC charging source is normally required due to the
large current drain of the radio.
2.4.3.1 Lead Acid Batteries
Lead acid batteries are designed to be float charged by a solar panel or AC
power source. The role of the lead acid battery is to supply power when the
charging source is absent, e.g., in case of power failures (AC charging), or
during times of zero charge with a solar panel. Generally, we recommend a
minimum of 7 Amp-hour batteries for RF applications.