Topcon AT-G6 User Manual

leveled instrument and dete r mine the distance or in-
terval "Q" on the rod between the bottom and top
stadia hairs.
3) The horizontal di stance " L" from the p lu mb line
center of the instrument to the rod is equal to 1 DO
times the stadia interval or stadia reading or rod
reading or "2".
If the line of si ght is inclin ed, however, the di stance
obtained by the above stadia met h od must be re-
duced to its corresponding horizontal distance and
vertical distance. To reduce the in clined or slope
distance "S", in this case, the following formulas can
be used:-
L = S-cos a
V
= 1/2 S·sin 2a
When L is the horizonta l distance, V the vertica l
distance and S the slope distance.
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ADJUSTMENT
The Auto-Levels in the AT-G Series are all exceptionally
sturdy and ruggedly constructed instruments, in spite of in-
corporating automatic leveling systems and featuring very
high precision, and, therefore, should seldom require adjust -
ments .
Furthermore, all instruments delivered undergo strict and
rigid inspections, from the time the raw material is delivered
to the factory until the final equipment is thoroughly in-
spected and precisely adjusted, by experienced technicians,
and then carefully packed for shipment to you. Therefore,
unless the instrument is subject to excessive rough handling
during transportation, it should arrive properly adjusted and
ready for immediate use.
Even
if it is suspected that the instrument has been subject to
excessive rough treatment by the carrier, be absolutely cer-
tain that adjustment is required before making the adjust-
ment. In other words, check the instrument until it is abso-
lutely certain beyond doubt that adjustment is actually
required and then proceed as explained following.
After adjustments are made, check the instrument once more
to see whether the adjustments have been properly made.
Of course, the adju stments noted following are also impor-
tant for the purpose of obtaining the greatest accuracy and
service from the inst rument.
Adjustment of the Circular Level
(1)
Set the instrument up on the tripod and carefully cen t er
the bubble of the circular level with the three leveli ng
Leveling screw
..
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Topcon AT-G6 Specifications

General

Brand	Topcon
Model	AT-G6
Category	Measuring Instruments
Language	English