TM 5-6675-250-20
2-6. ASSEMBLY AND PREPARATION FOR USE (Continued)
F I N E - L E V E L I N G ( C o n t i n u e d)
b . A d j u s t f i n e - l e v e l c o n t r o l ( 4 ) t o p l a c e t he
bubble in the center of the level vial.
N O TE
If adjustment cannot be made, proceed
to next step.
c. Release one of the tripod leg clamps (1).
d. Adjust leg (2) to obtain a level indication on
tripod circular level (3). Repeat procedure for each
of the other two tripod legs.
e . R o t a t e t h e a l i d a d e 9 0 d e g r e e s a n d a d j u st
b o t h t h e r e m a i n i n g l e g s ( 4 a n d 5 ) . C o n t i n u e t he
p r o c e s s u n t i l t h e a l i d a d e c a n b e r o t a t e d 3 60
d e g r e e s w i t h n o m o r e t h a n ± 1 / 2 d i v i s i on
displacement of the bubble.
SETUP PROCEDURE WITH AUXILIARY TRIPOD
Ensure that the auxiliary tripod is level.
ed when setting up the equipment. Bin-
ding of the SIAGL tripod legs may occur
during adjustment if the auxiliary tripod
is not Ieveled.
a. Spread auxiliary tripod legs (1, 2 and 3) out-
w a r d t o o b t a i n a l e v e l c o n d i t i o n w h i l e s t a n d i ng
the tripod assembly (4) in a vertical position over a
s e l e c t e d l o c a t i o n .
2-9
