Topcon AT-G6 User Manual

BASIC OPER AT ING PROCEDURES
1. Setting Up the Tripod
• Use tripods with a tripod screw of 5/8 in. diameter and
11 threads per inch, as per J I S B standareds, such as the
TOPCON Type E Aluminum Tripod or Wide-frame Wood-
en Tripod and the Dome Head Aluminum Tripod.
1) First, extend the extension legs to suitable lengths
and tighten the wing nuts on their mid - sections.
2) Tighten the hexagonal key fastening system on the
side of the tripod head so that the tripod legs don't
fall too loosel y. Place the tripod over the required
point, with legs spread about a meter apart or at such
angle as will insure stabillity of the tripod.
Place one tripod leg in position and then used the
other two to approximately level the tripod hea d.
If necessary, adjust leg extension, too.
3) Press the shoes on the tripod legs firmly into the
ground and anchor the tripod securely.
.------- In str um ent
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2. Attaching the Instrument to the Tripod Head
Take the instrument carefully out of the carrying case and
place it on the tripod head.
1) AI ign the tripod screw to the socket on the base of
the instrument. And, when aligned, screw in the
tripod screw unt il the instrument is securely fixed on
the tripod head.
2) If the hor iz onta l circle is being used for measuring
angles or establ i shing a line, the instr ument must be
set up exactly over the point with the plumb bob.
3) Use three leveling screws and center the bubble of the
circular level or, in other words, level the instrument.
If a dome head tripod is being used, in this case, how-
ever, simply loosen the tripod screw slightly and
move the instrument around on top of the tripod
head, while c hec king the circular level. When the
bubble is located inside the red-co l ored circle, in
this case, tighten the tripod socket .
3_ Setting the Instrument Up Over the Point
When the instrument is used to measure angles or to es-
tablish a line, the instrument must be set up exactly over a
particular point, with the plumb bob.
1) Hang the plumb bob hook on the plumb bob hanger
of the tripod screw.
2) Next, suspend t he plumb bob string from the plumb
bob hook and adjust string length with the slipping
device so that th e plumb bob is at a suitable height.
3) If the instrument has not been set up over the re-
quired point, move the instrument bodily over to the
point, without disturbing the relation between tripod
legs and tripod head. Place down in position so that
plumb bob is about one centimeter or so directly over
the point.
Grasp two of the tripod legs and adjust with resp ec t
to the third leg so that the tripod head is level at a
convenient height, with sufficient spread of th e legs,
when the two legs are allowed to touch ground.
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Topcon AT-G6 Specifications

General

Brand	Topcon
Model	AT-G6
Category	Measuring Instruments
Language	English