Onset
Computer
Corporation
User’s Guide
- 102 -
HOBO U30 Station/RC
Task 5: Mount Upper Mast to Lower Mast
NOTE
: Onset recommends that two people work together to attach the upper mast to the lower mast.
1.
Lightly grease the creased (upper) end of the lower mast.
2.
While holding the upper mast securely, cut the cable ties that were temporarily holding the upper
mast to the lower mast.
3.
Slide the upper mast onto the lower mast with the dimple going into the crease and oriented north
if you are in the northern hemisphere, and south if you are in the southern hemisphere.
4.
When the upper and lower masts are aligned, install the 1-5/8 inch U-bolt assembly onto the upper
mast, placing it just above the dimple (about 2.5 cm or 1 inch from the upper mast bottom).
Tighten the clamp.
Figure 33:
Upper and lower mast assembly
If you are using a Wind Speed sensor and have not attached the cross arm, go to Task 4: Mount Cross
Arm (Optional) on page 101
.
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