Technical Data Zoom90 | 47
Characteristics
8.5 Automatic Prism Aiming AiM
Range AiM/TRack
AiM accuracy with the
ZPR100 prism
System accuracy with
AiM
• The accuracy with which the position of a prism can be determined with Automatic Prism Aiming (AiM)
depends on several factors such as internal AiM accuracy, instrument angle accuracy, prism type,
selected EDM measuring program and the external measuring conditions. The AiM has a basic standard
deviation level of ± 1 mm.
• The following graph shows the AiM standard deviation based on three different prism types, distances
and instrument accuracies.
Principle: Phase measurement
Type: Coaxial, visible red laser
Carrier wave: 658 nm
Measuring system: System analyser basis 100 MHz - 150 MHz
Reflector Range AiM mode TRack mode
[m] [ft] [m] [ft]
Standard prism (ZPR100) 1000 3300 800 2600
360° prism (ZPR1, GRZ122) 800 2600 600 2000
360° Mini prism (GRZ101) 350 1150 200 660
Mini prism (ZMP100) 500 1600 400 1300
Reflector tape
60 mm x 60 mm (ZTM100)
45 150 not qualified
The maximum range can be restricted by poorer conditions, for example rain.
Shortest measuring distance: 360° prism AiM: 1.5 m
Shortest measuring distance: 360° prism TRack: 5 m
AiM angle accuracy Hz, V (std. dev. ISO 17123-3): 1 " (0.3 mgon)
Base Positioning accuracy (std.dev.): ± 1 mm
GeoMax ZPR1 prism (360°)
GeoMax GRZ122 prism (360°)
GeoMax circular prisms and GeoMax circular Mini
prisms
mm AiM accuracy [mm]
m Distance measurement [m]
" Instrument angle accuracy ["]
20
mm
m
18
16
14
12
10
8
6
5”
3”
2”
1”
4
2
0
0
100
200
300
400
500
600
700
800
GRZ122
ZPR1
j
ZPR100, ZMP100
009867_001
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