10
PREPARATION FOR MEASUREMENT
1.
MOUNT INSTRUMENT and PREPARE FOR MEASUREMNET
Level and center the instrument precisely to get the best
performance.
a.
Mount tripod
Firstly place the tripod legs to a suitable spot and tighten the locking
device.
b.
Mount instrument
Attach the instrument to the tripod carefully, then move instrument
by loosening center screw. Fasten slightly the center screw when
the plummet is centered over the sign.
c.
Roughly level the instrument with the circular vial
?
Use footscrew 1, 2 to move the air bubble in the circular vial
so it is centered left to right.
?
Use footscrew 3 to move the air bubble to the center of the
vial.
d.
Fine tune level the instrument with the plate level
?
Loosen horizontal clamp knob. Turn the instrument to place
the plate vial parallel with the footscrew 1, 2. Center the
bubble using these two footscrews. Attention: Turn the two
foot screws reversely when you adjust them.
?
Turn the instrument 90°and center the bubble using level
screw 3.
?
Repeat step ? ? ? every time the instrument is turned 90°to
center all the bubbles in these positions.
