-8-
When leveling your instrument, be sure
not to touch the tripod. Follow these
instructions carefully.
Line up the telescope so that it is directly
over one pair of leveling screws.
Grasp these two leveling screws with the
thumb and forefinger of each hand.
Turn both screws at the same time
by
moving your thumbs toward each other
or away from each other, until the bubble
is centered.
When the bubble is centered, rotate the
telescope 90 degrees over the second
pair of leveling screws and repeat the
thumbs in, thumbs out leveling procedure
until the bubble is again centered.
Shift back to the original position and
check the level.
Make minor adjustments with leveling
screws if necessary.
Final Level Check
Rotate the telescope over each of four
leveling points to be sure the bubble
remains centered.
Rule for Quick and Simple
Leveling
THUMBS IN, THUMBS OUT. Turn
BOTH screws equally and simultaneously.
Practice will help you get the feel of the
screws and the movement of the bubble.
It will also help to remember that the
direction your left thumb moves is the
direction the bubble will move.
Reading the Circle and Vernier
The 360° horizontal circle
6
is divided in
quadrants (0 - 90°). The circle is marked
in degrees and numbered every 10
degrees. The horizontal circle is referred
to as the circle or degree scale.
For very precise readings, Universal
instruments are equipped with a vernier
8
which divides each degree on the circle or
arc into 12 equal parts of 5 minutes each.
There are 60 minutes (60’) in a degree.
The vernier scale
8
is read in the same
direction (right or left) as you’re reading
the degree scale.
