SOUTH
ET
‐
02/05
ELECTRONIC
THEODOLITE
SERVICE
MANUAL
18
SOUTH
SURVEY
&
MAPPING
INSTRUMENT
CO.,
LTD.
18
B
A
C
B
A
C
CHECK AND ADJUSTMENT
Preparation
Before the adjustment you should prepare the tools such as screwdrivers, correction pins, varnish and hexagon
wrenches, then put the instrument on the collimator and you had better wash your hands before the adjustment.
Introduction
In this
chapter,
it introduces the adjustment procedure of theodolite ET-02/ET-05. The whole procedure will
operate on the collimator according to the following steps, the operation in the open air or other place will not
be described in this chapter. Be aware that, except the adjustment of optical plummet, other adjustments must be
in accordant to the following steps. Disarrange the steps will not assure the parameter of the instrument will
conform to the standard specification.
Calibration
1. Plate Vial
Rotate instrument, make plate level parallel with line between two
leveling screws A and B, then adjust two leveling screws A and B in one
direction, clockwise or counter-clockwise, to make plate bubble centered
Turn the instrument for 90°, make the plate bubble vertical to the two
leveling screws A and B. Adjust the third leveling screw C, and make the
plate bubble centered. Repeat the steps till to the bubble in center in both
positions.
B
Rotate instrument around vertical axis with a 180°. If the plate bubble is not
centered, the plate vial needs to be adjusted. The working principle is that,
as shown in the red region, adjust the adjusting screws with correction pin,
and make plate bubble to move half of the offset back. Repeat the steps
above to check the adjustment until the plate bubble is centered.
A
B
C
