ET107 Weather Station
8
5.1.4 Soil Temperature
The measurement site for soil temperature should be at least 1 m
2
(10.76 ft
2
) and
typical of the surface of interest. The ground surface should be level with respect
to the immediate area of 10 m (32.81 ft) radius.
Standard measurement depths:
10.0 cm ± 1.0 cm (4 in ± 0.4 in) (AASC)
5.0 cm, 10.0 cm, 50.0 cm, 100.0 cm (2 in, 4 in, 19.7 in, 39.4 in) (WMO)
5.2 Base Foundation
5.2.1 Supplied Components for Base Foundation
The following components included with the ET107 are used to install the
base:
(3) 5/8-inch anchor L-bolts
(9) 5/8-inch nuts
(1) anchor template
5.2.2 Base Foundation Installation Procedure
The pole attaches to a user-supplied concrete foundation constructed as shown
in FIGURE
FIGURE 5-2. ET107 pole base installation
1.
Construct the concrete form with 2-inch-by-4-inch lumber and 16p nails.
2.
Assemble the template and anchor bolts. For each bolt, place two nuts
below and one nut above the template.
3.
Clear an area large enough to set the form at the desired elevation.