Campbell Scientific ET107 Evapotranspiration Monitoring Station - Manual (Page 16)

ET107 Weather Station
Wire strippers
Pocket knife
Calculator
Volt / Ohm Meter
Electrical Tape
Step ladder (6 ft)
Station manuals
Station log and pen
Open end wrenches: 3/8 in, 7/16 in, 1/2 in, 9/16 in, 15/16 in
Socket wrench and 7/16 inch deep well socket
Adjustable wrench
Pliers
Conduit and associated tools (as required)
Felt-tipped marking pen
Claw hammer
Pipe wrench (12 in)
1.4 Supplies for Power and Communications Options
AC Power
Wire, conduit, and junction boxes as needed (see FIGURE 2-1).
User supplies valve box at base of station and weatherproof
enclosure for transformer. See FIGURE 2-1.
Phone Modem
Phone modem at the central computer.
Dedicated single twisted pair with shield phone line to the weather station
valve/junction box (see FIGURE 2-1).
Short-Haul Modem
Direct burial cable with a minimum of 2-twisted pairs with shield (minimum 5
conductors total) to travel from the weather station to the central computer
junction box. Direct burial armored cable may be required for rocky soils or
rodents (Anixter pn F-02P22BPN (phone 847-677-2600)) or equivalent type
cable (see FIGURE 2-1).
RF450
Antenna for the ET107 station (pn 14205 Yagi antenna recommended). PS24
Power Supply and pn 18520 Hanger Kit if not using ac power (see Appendix
B, PS24 24 Ahr Power Supply and 10 x 12 inch Enclosure).
1.5 Determining True North for Wind Vane Orientation
Magnetic declination, or other methods to find True North, should be determined
prior to installing the weather station. True North is usually found by reading a
magnetic compass and applying the correction for magnetic declination*; where
magnetic declination is the number of degrees between True North and Magnetic
North. The preferred method to obtain magnetic declination for a specific site is to
use a web calculator offered by NOAA (Section 1.5.1, Web Calculator). The
magnetic declination can also be obtained from a map or local airport. A general
map showing magnetic declination for the contiguous United States is shown in
FIGURE 1-6.
NOTE
6