Key
to
located on the rear of the left alidade standard. This
1. Compass
screw
2. Compass assembly
knurled
screw
provides
adjustment
for
a
true
3. Compass eyepiece
r e a d i n g of the vertical circle if the vertical circle
level is not at coincidence, as would be indicated by
5. Compass bolder with bolts
a vertical circle reading above or below 1,600 mils
6. Alidade connector receptacle
after
horizontal
(lateral)
7. Battery cable connector plug
8. Switch and rheostat knob
2-16. Horizontal Clamp Screw
9. Battery box
T h e horizontal clamp screw (8, fig. 1-3) is located
10. Hand lamp cable connector plug
on the right side of the horizontal circle housing (7,
11.T r i p o d
1 2 .B a t t e r y
cable
connector
plug
1 3 .H a n d
lamp
t h e o d o l i t e in any desired position on its horizontal
1 4 .I n n e r
base
housing
receptacle
plane.
1 5 .P l u g - i n
lamp
connector
plug
1 6 .P l u g - i n
lamp
1 7 .M o u n t i n g
screw
The three foot screws (9, fig. 1-1) are located on the
1 8 .P l u g - i n
lamp
reflector
t r i b r a c h assembly, (9, fig. 1-4). These foot screws
1 9. C o m p a s s
caging
knob
are used in conjunction with the circular and plate
levels to quickly and accurately true up the
The vertical slow motion screw (11, fig. 1-3) is
theodolite.
l o c a t e d on the rear of the right alidade standard.
2-18. Tibrach Clamp Lever
T h i s knurled screw provides precision adjustment
T h e tribrach clamp lever (6, fig. 1-3) is located on
i n the final vertical positioning of the telescope.
t h e tribrach assembly (9, fig. 1-4), and secures the
2-13. Horizontal
Slow Motion
Screw
t h e o d o l i t e to the tribrach assembly.
The horizontal slow motion screw (11, fig. 1-1) is
Optical
Plumb
located on the front of the horizontal circle housing
T h e optical plumb eyepiece (5, fig. 1-1) is located
(7). This knurled screw provides precision ad-
in the base of the alidade. The eyepiece is used by
justment
in
the
horizontal
positioning
of
the
the operator to quickly determine whether the
telescope.
theodolite is centered exactly over the station point.
2-20. Vertical Circle
Scale
The horizontal circle clamp (8, fig. 1-4) is located
The vertical circle scale (fig. 2-2) appears in the
on the rear of the theodolite in the upper part of the
u p p e r part of the window as viewed through the
horizontal circle housing (7, fig. 1-1). This clamp is
microscope eyepiece. The scale is graduated in
used by the operator to lock the horizontal circle in
t e n t h s of roils (6,400 mils equal 360), with each
a n y given position during orientation.
mil being numbered.
2-15. Collimation
Slow Motion
Screw
The collimation slow motion screw (7, fig. 1-2) is