CHC
CTS-112R4 user manual
25
6.
Preparation for measurements
6.1.
Unpacking and storage of instrument
Unpacking of instrument
Place the case lightly with the cover upward, and unlock the case, take out the instrument.
Storage of instrument
Cover the telescope cap, place the instrument into the case with the vertical clamp screw and circular
vial upwards (Objective lens towards tribrach), and slightly tighten the vertical clamp screw and lock the
case.
6.2.
Instrument setup
Mount the instrument to the tripod. Level and center the instrument precisely to ensure the best
performance.
6.2.1.
Leveling and Centering the Instrument by plumb bob
1)
Set up the tripod.
2)
First, extend the extension legs to suitable length, make the tripod head parallel to the ground and
tighten the screws.
3)
Make the center of the tripod and the occupied point approximately on the same plumb line.
4)
Step on the tripod to make sure if it is well stationed on the ground.
5)
Attaching the instrument on the tripod.
6)
Place the instrument carefully on the tripod head and slide the instrument by loosening the tripod
screw. If the plumb bob is positioned right over the center of the point, slightly tighten the tripod.
7)
Roughly leveling the instrument by using the circular vial.
8)
Turn the leveling screw A and B to move the bubble in the circular vial, in which case the bubble is
located on a line perpendicular to a line running through the centers of the two leveling screw being
adjusted .
9)
Turn the leveling screw C to move the bubble to the center of the circular vial.
10)
Precisely leveling by using the plate vial.
