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Back
Figure 2-3. Line Leveling
Up
TM-5-6675-329-13-P Self-Leveling Surveying Level (Wild Heerbrugg Model NA2-80) NSN
Next
CHAPTER 3 OPERATOR'S MAINTENANCE INSTRUCTIONS - TM-5-6675-329-13-P0029
TM 5-6675-329-13 & P
2-8
PACKING UP
a.
The Carrying Case NA2-80 is opened. Remove the objective assembly sunshade (4, Figure 1-1) from the
telescope object housing (4, Figure 1-2) and store it in the Carrying Case NA2-80. With one hand on the Automatic
Level NA2, the other hand is used to loosen the tripod central fixing screw (2, Figure 1-3). Holding on to the base plate
(1), the instrument is placed upside down in its recess in the lower shell transport case (1, Figure 1-4) of the Carrying
Case NA2-80. The upper shell is placed over it, both shells are pressed together, the locking hook is engaged and the
clasp (3) at the end of the carrying strap is snapped closed.
If the instrument has become wet during use it should be wiped carefully and the Carrying Case NA2-80
should be opened as soon as possible (normally back at the base) so that the instrument can dry out completely. Never
leave a wet instrument in a closed Carrying Case NA2-80.
Section IV: OPERATION UNDER UNUSUAL CONDITIONS
2-9
GENERAL
Surveying Level NA2-80 is designed to operate normally within a wide range of climatic conditions. However,
some conditions as indicated in paragraph 2-7, require certain precautions to avoid potential damage to the equipment.
2-10 OPERATION IN UNUSUAL WEATHER
a.
When the instrument must be used in an atmosphere where the ambient temperature is more than 10
F
different than that at which it was stored, allow at least two minutes for each difference to permit temperature
F
stabilization and for evaporization of condensation.
b.
In order to prevent penetration of dust into the interior of the instrument, it is not recommended that the
instrument be used during severe windstorms.
c.
Rain will wet the exterior of the instrument and will facilitate penetration of moisture. The cover (5, Figure 1-
1) is designed to protect the Automatic Level NA2 from dust and rain and mud. (To protect Surveying Level NA2 (and
the operator) from rain, and shade it from the sun during extremely hot conditions, a large umbrella should be available
d.
An instrument which has become wet or muddy during use must be wiped carefully and must be removed
from its Carrying Case NA2-80 as soon as possible after returning to base, and allowed to dry out completely. It must not
be temporarily stored with the Carrying Case NA2-80 closed before it has dried out completely.
2-11/(2-12 blank)

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