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Adjusting the Instrument
Circular Level
1. Set up the instrument.
2. Center the bubble of the circular level using the leveling
screws.
3. Turn the telescope 180° (200 grads).
4 Check to see whether the bubble is still centered in the circle.
If it isn’t, eliminate one half of the error with the leveling
screws and the other half with the two adjustment screws for
the circular level.
5. Repeat the process until the bubble remains centered when
the instrument is turned.
Taking an Angle Measurement
1. Set up the tripod so that it is over a hub.
Note: Make sure the tripod is stable and the tripod head is
relatively level.
2. Hang a plumb-bob from the plumb-bob hook on the tripod.
Note: Make sure the plumb-bob is over the hub.
3. Attach the instrument to the tripod.
4. Center the plumb-bob over the pin in the hub by varying
the length of the tripod legs or by shifting the instrument
on the tripod.
5. Accurately align the telescope to the first target using the
sighting guides and a horizontal tangent knob.
Note: The first target is a known point.
6. Turn the horizontal rotation ring until 0° on the angle index
aligns with the angle index reading line.
7. Accurately align the telescope to the second target and read
the angle.
Line of Sight
Service Request
To locate your local dealer or authorized Nikon Service Center
for service, accessories, or spare parts, contact one of our offices
listed below.
Trimble Construction Division
5475 Kellenburger Road
Dayton, Ohio 45424-1099
USA
+1-937-245-5600 Phone
© 2002-2005, Trimble Navigation Limited. All rights reserved.
Nikon is a registered trademark of Nikon. PN 1049-1010 Rev. C (07/05)
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North America
Trimble Construction Division
5475 Kellenburger Road
Dayton, Ohio 45424-1099
U.S.A.
(800) 538-7800 (Toll Free)
+1-937-245-5600 Phone
+1-937-233-9004 Fax
Europe
Trimble GmbH
Am Prime Parc 11
65479 Raunheim
GERMANY
+49-6142-2100-0 Phone
+49-6142-2100-550 Fax
Latin America
Trimble Navigation Limited
6505 Blue Lagoon Drive
Suite 120
Miami, FL 33126
U.S.A.
+1-305-263-9033 Phone
+1-305-263-8975 Fax
Africa & Middle East
Trimble Export Middle-East
P.O. Box 17760
Jebel Ali Free Zone, Dubai
UAE
+971-4-881-3005 Phone
+971-4-881-3007 Fax
Asia-Pacific
Trimble Navigation
Australia PTY Limited
Level 1/120 Wickham Street
Fortitude Valley, QLD 4006
AUSTRALIA
+61-7-3216-0044 Phone
+61-7-3216-0088 Fax
China
Trimble Beijing
Room 2805-07, Tengda Plaza,
No. 168 Xiwai Street
Haidian District
Beijing, China 100044
+86 10 8857 7575 Phone
+86 10 8857 7161 Fax
www.trimble.com.cn
4. Move the instrument and reset it up so that it is about 2 m
behind point B.
5. Take another reading at point B (b
2
= 1.462 m).
6. Add b
2
to d to get value c (1.462 + 1.487 = 2.949 m).
7. Take another reading at point A (a
2
).
8. Compare value c (2.949) to a
2
. If the line of sight is correct,
both numbers should be the same. If they differ by more than
4 mm, reset the grade rod on point A and turn the crosshairs
adjustment screws (unscrew the cover to expose them) until
value c (2.949) is centered in the crosshairs.
Caution: The upper and lower adjustment screws are
counter-screws and must not be set too tightly.
9. Repeat the process until the line of sight is correct
(c and a
2
are the same).
1. Set up the instrument half way between two points (A and B)
that are 30 to 40 m apart.
2. Take a reading at point A (a
1
= 2.423 m) and another one at
point B (b
1
= 0.936 m).
3. Subtract b
1
from a
1
to get the difference between the points
(d = +1.487 m). Make sure you note whether value d is a
positive or negative number.
Note: Because the distance from the instrument to each of
the points is equal, the difference in elevation is correct even
if the line of sight is out of adjustment.
Specifications
AX-2S AC-2S AP-8
Dimensions (W x L x H)
Instrument 190 x 123 x 128 mm 190 x 123 x 128 mm 190 x 123 x 128 mm
(7.5 x 4.8 x 5.0 in.) (7.5 x 4.8 x 5.0 in.) (7.5 x 4.8 x 5.0 in.)
Case 292 x 163 x 170 mm 292 x 163 x 170 mm 292 x 163 x 170 mm
(11.5 x 6.4 x 6.7 in.) (11.5 x 6.4 x 6.7 in.) (11.5 x 6.4 x 6.7 in.)
Weight
Instrument 1.30 kg (2.9 lb) 1.30 kg (2.9 lb) 1.30 kg (2.9 lb)
Case 0.9 kg (2.0 lb) 0.9 kg (2.0 lb) 0.9 kg (2.0 lb)
Accuracy
Standard deviation according to +/–2.5 mm +/–2.0 mm +/–1.5 mm
DIN 18723 on 1 km of double leveling
Leveling accuracy 3 mm @ 30 m 3 mm @ 46 m 1.5 mm @ 60 m
(
1
/8 in. @ 100 ft) (
1
/8 in. @ 150 ft) (
1
/16 in. @ 200 ft)
Telescope
Magnification 20x 24x 28x
Aperture 30 mm (1.2 in) 30 mm (1.2 in) 30 mm (1.2 in)
Telescope image Erect Erect Erect
Field of view angle 1° 30' (2.6 ft @ 100 ft) 1° 30' (2.6 ft @ 100 ft) 1° 30' (2.6 ft @ 100 ft)
Shortest focusing distance 0.75 m (2.46 ft) 0.75 m (2.46 ft) 0.75 m (2.46 ft)
Stadia constant 100 100 100
Addition constant +10 cm +10 cm +10 cm
Automatic Compensator
Type Wire suspension, Wire suspension, Wire suspension,
magnetically damped magnetically damped magnetically damped
Working Range +/–16 minutes +/–16 minutes +/–16 minutes
Setting Accuracy +/–0.5 seconds +/–0.5 seconds +/–0.5 seconds
a
2
b
2
a
1
b
1
A
B
a
2
= 2.423 b
2
= 1.462
+b
1
= 0.936 -d
= 1.487
d
= +1.487 c
= 2.949
North America
Tripod Data Systems, Inc.
4100 SW Research Way
Corvallis, OR 97333
U.S.A.
+1-541-753-9322 Phone
+1-541-757-7439 Fax
www.tdsway.com
Notice to Our European Union Customers
For product recycling instructions and more information,
please go to: www.trimble.com/environment/summary.html
Recycling in Europe
To recycle Trimble WEEE, call: +31 497 53 2430, and ask for the “WEEE
associate,” or
mail a request for recycling instructions to:
Trimble Europe BV
c/o Menlo Worldwide Logistics
Meerheide 45
5521 DZ Eersel, NL