-9-
OPERATION
Initial Operation
!
WARNING
Protect the instrument
against moisture and
direct sun light.
Do not subject the instrument to extreme
temperatures or variations in temperature.
As an example, do not leave it in vehicles
for long time. In case of large variations
in temperature, allow the instrument
to adjust to the ambient temperature
before putting it into operation.
In case
of extreme temperatures or variations
in temperature, the accuracy of the
instrument can be impaired.
Avoid heavy impact or falling of the
instrument.
After heavy exterior impact on
the instrument, an accuracy check should
always be carried out before continuing
to work.
Setting Up Instrument
!
WARNING
It is important that the
tripod is set up firmly.
Make sure that the tripod points are well
into the ground.
On paved surfaces, be
sure the points hold securely.
The legs should have about a 3-1⁄2 foot
spread, positioned so the top of the tripod
head appears level.
If using a tripod with adjustable legs, be
sure the leg clamps are securely hand
tightened.
Before setting up your instrument, be sure
clamps are loosened and both telescope
lock levers are in the closed position.
Attach the instrument to the tripod
securely, hand tightening the instrument
base to the 5/8-11 tripod head.
Setting Up Over a Point
!
WARNING
Never use force on any
parts of the instrument.
All moving parts will turn freely and easily
by hand.
Hang the plumb bob (LT8-300), attach
cord to the plumb bob hook of the tripod.
The LT8-300P is equipped with an optical
plummet. The LT8-300LP is equipped
with a laser plummet.
This eliminates the need to use a plumb
bob. The instrument is set up over a
reference point by looking through an
eyepiece and optically lining up over
the point (LT8-300P) or using the laser
plummet beam (LT8-300LP).
Move the tripod and instrument over the
approximate point. (Be sure the tripod
is set up firmly again. Loosen leveling
screws and shift the instrument laterally
until the instrument is positioned directly
over the point.
Positioning LT8-300P Directly Over Point
When looking through the eyepiece
19
the light path
is reflected through 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.
