-10-
If necessary, the instrument can be shifted
by loosening the tripod center stud and
sliding the instrument from side to side for
proper positioning.
Positioning Directly Over Point Using
Laser Plummet
To switch ON the laser plummet, press
and release the
V
H
R
TILT
HOLD
R / L
OSET
V%
ON/OFF
HOLD
R / L
OSET
V%
ON/OFF
HOLD
R / L
OSET
V%
ON/OFF
button. A laser point
will project through the center of the
instrument to the reference point (a stake
on the ground).
- Line up the tripod over the reference
point.
- Remove the plumb bob hanger from
the center stud of the tripod.
- Attach the instrument to the tripod.
- Level the instrument.
- Line up the laser point with the
reference point.
If necessary, the instrument can be
shifted by loosening the tripod center stud
and sliding the instrument from side to
side for proper positioning.
Leveling the Instrument
Center the instruments circular vial
8
by
carefully extending or shortening the
tripod leg closest to the bubble. Caution:
Use only two legs. Repeat until alignment
is within 1/4-in (6 mm).
Set the instrument leveling screws. Turn
down the leveling screws
12
until firm
contact is made with the instrument base.
!
CAUTION
Do not overtighten the
leveling screws.
It is
very possible to overtighten the leveling
screws. Only a firm contact between the
screws and the base is necessary. If the
instrument shifts on the base, turn down
the screw more firmly by hand.
Leveling the instrument so the vial bubble
remains centered through a 360° rotation
of the telescope is the most important
operation in preparing to use your
instrument.
When leveling your instrument, be sure
not to touch the tripod. Follow these
instructions carefully.
Use the tubular vial
17
to accurately level
the instrument. Unlock
13
and turn the
instrument so that the tubular vial
17
is
parallel to
BC
, any two leveling screws.
- Note the direction to turn the leveling
screws. When turning the two screws,
adjust them equally. The bubble will
move in the direction that your left
thumb turns.
- To move the bubble to the right, turn the
B
leveling screw in and simultaneously
turn the
C
leveling screw in.
- To move the bubble left, move both
screws out simultaneously.
Once centered turn the instrument 90˚
over
A
leveling screw and turn screw
A
in
or out until bubble is centered.
Go back to the first position
BC
, and
repeat until the bubble is centered in both
positions. Then from position
BC
turn 180˚
to check the adjustment.
If the bubble stays centered or within ¼
division, you are leveled.
Next, check the ground point centering. If
you are not directly on the point, carefully
loosen the tripod fastener and move the
instrument on the tripod head in an x - y
