Leica TS13 User Manual page 69

Telescope
Technical Data
Example: "Single measurements: 1 mm + 1.5 ppm"
The EDM accuracies for prism and reflectorless measurements can differ. Addi-
tionally, the accuracies can differ depending on the used technologies.
Refer to the appropriate data sheet for information about the EDM
☞
accuracy.
ATR accuracy
Automatic target aiming accuracies, like those of the ATR, are in general the
same as the stated angular accuracy. Therefore these accuracies are also dis-
tance-dependent parameters.
External impacts, like heat shimmer, rain (prism surface covered by rain drops),
fog, dust, strong background lights, dirty targets, alignment of the targets etc.
can have a significant influence on the automated target. In addition the selec-
ted EDM mode affects the ATR performance. Under good environmental condi-
tions and with a clean, properly aligned target the accuracy of the automated
target aiming is equivalent to the manual target aiming (presumed valid cali-
bration values).
Type and centring accuracy of the prism
The prism centring accuracy depends mainly on the used prism type, for exam-
ple:
Prism type
Leica GPR1
Leica GPH1P
Leica GRZ122
Leica GRZ4
Refer to the white paper "Leica Surveying Reflectors" for information
☞
about the different centring accuracies.
Additional influencing factors
When determining absolute coordinates, the following parameters can also
affect the resulting accuracy:
Environmental conditions: temperature, air pressure and humidity
•
Typical instrument errors, such as horizontal collimation error or index
•
error.
• Proper functioning of laser plummet or optical plummet
Correct horizontal levelling
•
Setup of the target
•
• Quality of additional equipment, such as tribrach or tripod.
Type
Magnification
Free Objective aperture
Focusing
Field of view
Circular prism
Precision circular prism
360° prism
360° prism
Value
30x
40mm
1.7m/5.6ft to infinity
1°30'/1.66gon
2.7m at 100m
Centring accuracy
1.0 mm
0.3 mm
2.0 mm
5.0 mm
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