Wild T2 old / T2 new
T2 old
T2 new
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Maker: Wild Heerbugg
Year: T2 old
since 1926; T2E since 1958; T2 new since 1973
Price:
T2 new: ca. 7500 € ; T2E and T2 no declaration
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T2
new
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T2
old
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technical data:
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standard deviation
(according to DIN 18723)
telescope
extension piece
free object diameter
field of vision diameter at 1000
m
shortest distance to read
multiplication constant
addition constant
sensitivity of the circular level
Alhidadenlevel
Indexlevel
automatic height index
to bring in accuracy
to bring in range
glass circles
division diameter
Hz-circle
V-circle
dividing
clearance (both circles)
smallest
dividing clearance at
the optical micrometer
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0,25mgon (0,8")
upright image
30x
40mm
29m
2,2m
100
0
8´/2mm
20"/2mm
+ 0,3"
+ 5´
400gon (360°)
90mm
70mm
0,2gon
(20´)
0,1
mgon (1")
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T2: inverted image
T2 E: upright image
28x
40mm
29m
T2: 1,5 m
T2E: 2,2 m
100
0
8´/2mm
20"/2mm
30"/2mm
400gon (360°)
90mm
70mm
20´(0,2gon)
1"
( 0,1mgon) |
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explanation of the sectional drawing:
1: bottom plate
2: leveling screw
3: reflector for the index level
4: heigh appetite
5: levelprism for the indexlevel
6: lighting reflector for the vertikal circle
7: vertikal circle box
8: heigh clamp
9: telescope eyepiece
10: circle reading eyepiece
11: micrometre screw
12: alhidade level
13: button for the horizontal-
or vertical circle
14: transit screw
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image 1
image 2
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image 1 circleimage (400 gon) in the read of
microscope before the coconsidering of the graduation marks
While turning at the read of microscope, the graduation marks are
one superimposed on the other, so that
correct reading is possible.
( look at image 2)
image 2 reading example for azimuth - or verticalcircle
(400gon):
gon
105
tenth
part lgon 8
micrometer
224
result 105,8224 gon
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This is about the famous Wild T2 Micrometer
Theodolite and due to its compact and sturdy construction it has been used
by surveyors all over the world ever since Heinrich Wild created the first
model T2 back in the 1920's. Instead of incorporating only one illuminatin
mirror for reading both the horizontal and vertical cicles, there are actually
two illuminating mirrors, one for the horizontal circle and one for the
vertical circle. This is actually a slight disadvantage since the mirrors
are located at different sides on the instrument and so reading the circles
may not be as efficient. The theodolite features a coincidence micrometer
circle reading system.
History: The original Wild T2 was one of the first
theodolites to feature glass circles and an optical reading system, after
Wild's Zeiss Th1.