Campbell-scientific UT20 and UT30 Tower-based Weather Stations Manuale Utente Scaricare il pdf (Pagina 21)

UT20 and UT30 Tower-based Weather Stations

7-3. Align each J-bolt so the angled portion is pointing outward and

tighten the lower nuts to secure the assembly.

FIGURE 7-3. J-bolt template assembly

3. Construct a concrete form as shown in FIGURE 7-4 out of 2-inch x 4-inch

lumber, 24 inches square (inside dimensions). Construct the 1-inch x 2-

inch template frame and set it aside. Center the form over the hole and

drive a stake centered along the outside edge of each side. Level the form

by driving nails through the stakes and into the form while holding the

form level.

FIGURE 7-4. Positioning the J-bolt in concrete

4. Position the J-bolt template as shown in FIGURE 7-3. The top of each

bolt will be 3.00 inches ±0.25 inches above the level of the form. Level

the tops of the J-bolts in all directions using a small level and secure the

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Campbell-scientific UT20 and UT30 Tower-based Weather Stations Manuale Utente Pagina 21