Campbell-scientific UT20 and UT30 Tower-based Weather Stations Manual de usuario descargar pdf (Pagina 20)

UT20 and UT30 Tower-based Weather Stations

ground, lay out the two remaining anchor locations 10 feet from the first

anchor to the scribed line on either side of the base stake.

FIGURE 7-2. Guy anchor locations

On unlevel ground, use a compass at the base stake to lay out the remaining

two anchor locations 120 degrees from the first. Vary the distance between the

tower and each anchor so that the angle between the tower and the guy wire

will be approximately 30 degrees.

7.1.2 Tower Base Installation

There are two base options: the B18 base is poured in concrete; the RFM18

roof mount base is anchored to a flat surface.

7.1.2.1 B18 Base Installation

1. Dig a hole 36 inches square and 48 inches deep. Lighter soils will require

a deeper hole.

2. Assemble the J-bolt template as shown in FIGURE 7-3. Begin by

threading two 5/8-inch nuts onto each J-bolt, followed by a 5/8-inch

washer. Next, place a template piece over the J-bolt, followed by another

5/8-inch washer and a 5/8-inch split lock washer. Thread a third 5/8-inch

nut onto the J-bolt just until the bolt is even with the top of the bolt. Once

all three J-bolts are assembled, slide them together as shown in FIGURE

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 73 74

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Campbell-scientific UT20 and UT30 Tower-based Weather Stations Manual de usuario Pagina 20