A"
Topcon
AUTO LEVELS
AT,mGSERIES
OPTIONAL ACCESSORIES
Setting the diagonal eyepiece it
place of the standard telescope
eyepiece provides for collimating with easy posture.
[AT-G1 /G2/G2A/G3]
Get greater accuracy from AT-G series
engineering auto levels . In one kilometer of double run levelling, accuracy is
improved to ±0 .4mm (0 .001 ft .) .
Attaches to front of objective lens with
a counter-weight attached to the eyepiece. [AT-G1/G2/G2A/G3]
Increases magnification of
the telescope of AT-G
series engineering auto levels from 32X to 40X for
even more precise leveling .
[AT-G 1 /G2/G2A]
Provides light to the telescope reticle
when available light is insufficient, for
example, in tunnels or at night.
[AT-G1/G2/G2A/G3]
When used on top of tripod provides
quick and simple centering on reference points . Parallel shifts of 100mm
vertically and 30mm laterally.
Topcon's newlyand more comp
waterprq
PRECISION-BUII T F
AND Pi
[G1/G2/G2A]
AT-G1
The instrument has a completely
waterproof telescope and is,
therefore, ideal for all kinds of
wet-surveying operations, in light
rain or in tunnels .
Only test-approved telescopes
are used and, furthermore, dry
nitrogen gas is sealed in the telescope tube which effectively prevents lens clouding and moisture
condensation .
Redesigned for smoother, easier
operation all around, Topcon's
new G-series levels offer a larger
knob for faster, accurate adjustments and new materials for
lighter weight when you're on the
move .
Model AT-G1 has a glass horizontal
circle which is graduated in 10 minute
divisions (10c divisions) and numbered every degree (one grade), with
calibrations from 0° to 360° (Og to
400g) . Furthermore, readings are possible through a 25x reading microscope, with only a slight shift of the
eye, from the telescope eyepiece .
And, the horizontal circle freely rotates
for zero alignment .
Fine and coarse focusing is provided
by a coaxial focusing knob, which permits rapid setting and accurate focusing for perfect image at the same time .
designed engineering and construction automatic leve
pct than ever. They are lightweight for easy transport a
lof telescope is effective for all kinds of wet surveying c
W EXCELLENT LEVELING ACCURACY
FRFORMANC EVERY TIME FOR ENGINEERING
AT-G4
. AT-G6
AT-G3
SHORT Focus CONSTRUCTION LEVELS RUIL
Fine horizontal adjustments are possible at
any point through 360° (400g) of the arc, without clamping action, which means that target
alignments are greatly speeded up .
Furthermore, fine horizontal knobs are available on both sides, for very easy and speedy
adjustments .
Very fast instrument set-up is
possible because the base
plate can be used for fixing on
top of dome head tripods, such
as the TOPCON Dome Head
Aluminum Tripod .
are streamlined
d the completely
perations.
The circular level is checked
very easily with a slight shift of
the eye, with a clear, distinct
view observed via reflecting
pentagonal mirror (AT-G1/G2/
G3), pentagonal prism (ATG2A), hinged mirror (AT-G4/G6)
or fixed mirror (AT-G7) .
[G3-G7]
A time-proven magnetically-damped compensator is incorporated for automatic leveling action . It is not affected by fine vibrations and has been proven to have very
stable precision, thus speeding up automatic leveling operations and producing
accurate results .
The TOPCON-exclusive automatic leveling system utilizes four special mylar ribbons for hanging the magnetic damper
compensator, which is, therefore, not influenced by the magnetic field, as well as
having superior resistance to cold, heat
and shock .
AT-132A
AT-G7
°r TOUGH T® LAST
AT-G3/G4/G6
setting position
is suitable for
carried out by
tractors .
has a short range
of 0.5 meter which
close range work
builders and con-
AT-G4
The horizontal circle is graduated from 0° to 360° (Og to 400g)
clockwise in 1 ° (1g) divisions
and the value is indicated for
each 10° (10g).
Sighting through Topcon G-series levels
include AT-G7 is safe for anyone who
wears eyeglasses .
With their protective rubber eyepiece caps,
scratches and abrasions are reduced or
eliminated completely .
SPECIFICATIONS
ITEM
MODEL
Telescope
Length (mm/in .)
Image
Magnification
Objective lens (mm/in .)
Relative brightness
Field of view
Resolving power
Minimum focus (m/ft.)
Stadia constant (m)
Stadia ratio
Circular Level
Sensitivity (/2mm)
Automatic Leveling
Setting accuracy
Compensating range
Accuracy 1 km Double Run Level
w/o optical micrometer (mm)
with optical micrometer (mm)
Horizontal Circle
Diameter (mm/in .)
Minimum division
Weight
Instrument (kgs ./Ibs .)
Plastic carrying case (kgs ./Ibs.)
AT-G1
AT-G3
AT-132/l
229/9
Erect
32x
45/1 .8
1 .98
1 20'
2 .5"
1 .0/3 .2
229/9
Erect
32x
45/1 .8
1 .98
AT-G4
192/7.7
230/9
Erect
30x
40/1 .6
1 .78
1 20'
2 .5"
AT-G6
AT-G7
193/7.7
Erect
26x
30/1 .2
1 .33
1 30'
3 .5"
204/8
Erect
24x
30/1 .2
1 .56
1 30'
4 .0"
-
Erect
22x
30/1 .2
1 .86
1 30'
4 .0"
0
100
1 .0/3 .2
0
100
1'30'
3 .0"
0 .5/1 .6
0
100
8'
8'
8'
8'
8'
10'
±0 .3"
±15'
±0 .3"
±0 .3"
±0 .3"
±15'
±0 .3"
±15'
±0 .5"
±10'
±0 .7
±0 .4
±0 .7
±0 .4
± 1 .5
±2 .0
±2 .0
±2 .5
-
90/3 .5
10'(0.1g)
117/4.7
1°(1g)
117/4.7
1°(1g)
117/4.7
1°(1 g)
117/4 .7
1°(1g)
102/4.0
1°(1g)
1 .6/3 .5
1 .3/2 .9
1.6/3 .5
1 .3/2 .9
0
2 .1/4 .6
1 .3/2 .9
1
I
0
0 .5/1 .6
0
100
±1 .0
1 .8/4 .1
1.3/2 .9
I
1 .8/4 .1
1 .3/2 .9
0
I
0
0.5/1 .6
0
100
0.9/2 .9
0 .1
100
I
1 .2/2 .6
1 .2/2 .6
Designs and specifications herein are subject to change without notice .
Certiricate
No.94/3102
TOPCON CORPORATION
Surveying Instruments Division (Tokyo)
a
TOPCOn
TOPCON CORPORATION
75-1 Hasunume-cho. Itadashl-ku, Tokyo. 174 Japan
Phone. 33967-1101 Fax. 3-3960-4214 Telex . 0272-2384
TOPCON AMERICA CORPORATION
CORPORATE OFFICE
TOPCON S .A .R .L.
104/106, Rue Ri .
t
Ferret, France .
65 . West CentuRoad
ry
Later- N- Jerse y 07652IJS .A .
Phone.1-410E ' 40'
-1069490(TOPOGRAPHI
Phone 201-261-9450 Fax 201-387-2710 Telex. 134338
Fax . 1-473902,1 1 Te
ar '87
TOPCON CALIFORNIA
TOPCON ESPANA S.A .
3380 mdustrlal BLVD, Suite 105, West Sacramento, CA . 95691, U .S.A .
HEAD OFFICE
Phone 916-374-8575 Fax 916-374-8329
Fredel
'"
'1 "",0. Sent Just Desvern Barcelona. Spain
TO PCON MIDWEST
Phone 3 . .
4T .3932
1728 West Algongum Road . Arlington Heights, Illinois 60005, U .S A .
MADRID OFFI~'E
Phone. 708-818-9188 Fax .-7088189342
Avenlda Cud :
eh-a 81 . 1 Planta 28007, Madrid . Spain .
TOPCON DENVER
Phone 1-552^ . 11-4161
4895 Joriet Street . Suite E Denver . Co 80239, U .S .A.
TOPCON OPTICAL SVENSKA A. B .
Phone 303-073-0990 Fax 3033730998
-'
'.
lnduslrivagen 4 F
ten Sweden
AGT (Advanced Grade Technology,
9Yr Inc .)
Phone 031-2612
'14'4
26~
1
TOPCON Laser Products Division
TOPCON
SINGAPORE
PTE.
LTD.
396 Earhart Way.,,
Llvermore CA 94550 USA
.
. .
Alexandra
Distrip1s
Pasir
Penlang
Road, Singapore 0511 .
Phone. 510-443-8161 F ax 510-443-7302
Phone2780222
.
. ~
el~
RS?6622
TOPCON EUROPE B.V.
TOPCON AUSTRALIA PTY . LTD .
TOPCON DEUTSCHLAND G .m.b .H .
TOPCON INSTRUMENTS (THAILAND) CO., LTD .
Esse Bean 11, 2908 LJ Coveue a/d IJssel . The Netherlands
Phone 10-4585077 Fax 10-4585045 telex : 23783
Haskestr 7, 47877 Willlch . Germany .
Phone 021S4 9290 Fax 02154-929-111 Telex. 8531981 TOPC D
408 viohrla R
Phone 02-817
- NR/
. ? 11 " , Auatralla
-7- - 4
14L2S
1
', Plnsao-Nakarnohaisn RD .
BaOo'
^ TIL', -1d
Phoi iJ5
TOPCON INSTRUMENTS (MALAYSIA) SDN. BHD .
L,1226 Jalan Negara Dua. Pusa( Bandar Tartan MBawah, ,3100
Kuala Lumpur . Malaysia .
Phone 03 4079801 Fa
-4 ---
--
BLOOMFIELD COMPUTING SERVICES PTY . LTD.
408 vicrona Ro, h r .
phone
17
NS14I -111 . Australia
y
TOPCON KOREA CORPORATION
H-hn
'
Fi
e F
Korea
'31 EXTv264
,r-out
TOPCON OPTICAL (H .K .) LIMITED
2,4/F N
o Inausrnal Building- No 5r
Shaun. , T Hong "--g
Phone 10496881
6910264
, P u, Wan Street. F o T an Road .
TOPCON CORPORATION BEIJING OFFICE
R/N 10
His 1,
Phone
11-1
Building. 5 DOng Sanhuan
~ Fortune
, D - of Be, n g Chlne
91-2 Fax 5014190
Printed in Japan 9411-80LW TAC,`3)