t h e c a g i n g knob
(19)
in
a
clockwise
direc-
be tilted toward the operator of the theodolite
tion. Release the compass case by loosening the
during the check of vertical collimation by ad-
compass clamp screw (1). If the compass circle
justment of the vertical collimation slow motion
does not remain level while the case is rotated
screw (7).
through a complete circle, correct the leveling of the
(7) V e r t i c a l c o l l i m a t i o n s l o w m o t i o n
the compass with one or both of the compass
s e t s c r e w s (13, fig. 1-3) located in the base of the
turn easily and smoothly, but without backlash,
t h r o u g h o u t its entire travel. Use an adjusting pin
compass holder (5, fig. 2-1).
(4, fig. 2-7) to turn the collimation slow motion
2-27. Movement to a New Worksite
adjusting screw (8, fig. 1-2) to make the exact
a. Short Distances.
adjustment.
(1) For short distances in cleared, level areas,
(8) V e r t i c a l s l o w m o t i o n s c r e w . T h e v e r t i c a l
t h e operator may carry the instrument while it is
s l o w motion screw (11, fig. 1-3) must turn easily
still mounted on the tripod (fig. 2-4). If the in-
a n d smoothly, but without backlash, throughout its
s t r u m e n t is carried while mounted on the tripod,
e n t i r e travel. Use an adjusting pin (4, fig. 2-7) to
the operator should not carry it in any position
t u r n the vertical slow motion adjusting screw (10,
o t h e r than upright.
CAUTION
a s s e m b l y , to make the exact adjustment.
Never carry the instrument over the
(9) Horizontal slow motion screw. T h e
shoulder.
horizontal slow motion screw (11, fig. 1-1) must
( 2 ) When moving the instrument mounted on
turn easily and smoothly throughout its entire
the tripod through doorways or other confining
t r a v e l , but without backlash. Use an adjusting pin
a r e a s , the assembly should be carried in a tilting
p o s i t i o n with the tripod shoes to the rear.
1 ) to make the exact adjustment.
b. Long Distances.
(10) C i r c u l a r
compass.
(1) When carrying the theodolite for long
distances or over rough terrain, the instrument
t h e accessory case (1). Install the compass on the
s h o u l d be transported in the carrying case (fig. 2-
t h e o d o l i t e as shown in figure 2-1, by inserting the
compass legs into the compass holder (5) and
(2) Do not drop the carrying case into a
t i g h t e n i n g the locknuts.
v e h i c l e or on the ground during transportation.
(b) After mounting the compass, check the
compass circle for tilt. Release the circle by turning
Section
Il.
OPERATION
OF
AUXILIARY
EQUIPMENT
a n d sunglasses from the accessory case (fig. 2-7).
General
Install the diagonal eyepiece prisms by screwing the
The auxiliary material used with the theodolite
p r i s m mounts on the conventional eyepieces (1 and
includes sunglasses, diagonal eyepieces, mirror
4, fig. 2-9) in a clockwise direction. Slip the
assembly, battery box, and hand lamp assembly.
s u n g l a s s e s (3) over the telescope diagonal eyepiece
Operation of this equipment is described in para 2-
prism mount.
29 through 2-30.
2-29. Diagonal Eyepieces and Sunglasses
t h e telescope diagonal eyepiece prism and unscrew
a. Installation. The diagonal eyepiece prisms
the diagonal eyepiece prism
mounts
from
the
(4) and telescope sunglasses (3) are installed
telescope and microscope.
d i r e c t l y on the conventional eyepieces as shown in
figure 2-9. Remove the diagonal eyepiece prisms
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