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27. Technical Data
RTS680 series
Telescope
Length
156mm
Image
Erect
Objective
aperture
Ф
45mm
Magnification
30×
Field of view
1°
30
′
Mini focus distance
1.0
m
Reticle illumination
10 brightness levels
Angle measurement
Reading
system Absolute
encoder
Circle
diameter 79mm
Angle unit
degree/gon/mil, selectable
Minimum display
0.5
″
/1
″
/5
″
, selectable
0.0001°/0.0005°/0.001°, selectable
0.1mgon/0.2mgon/1mgon, selectable
Detecting mode
Both circles adopt diametrical detection
Accuracy
682
2
″
685 5
″
Distance measurement
Distance unit
m/ft, selectable
Measurement range(good condition)
Single prism
1 to 3000m
Mini-reading
Fine
mode
0.1mm/1mm(0.001ft/0.01ft)
Tracking mode 10mm (0.1ft)
Accuracy
±(2mm
+
2ppm·D)/ ±(1mm
+
1.5ppm·D) optional
Measurement time (Initial: 2.5s)
Prism
typical:
1.0-1.5s
Temperature
unit
/ ,
selectable
℃ ℉
Pressure
unit
hPa/mmHg/inchHg,
selectable
Temperature
input
range
-30
℃
to +60 (1 steps)
℃
℃
Pressure
input
range 510hPa
to
1066hPa(1hPa
setps)
Prism
constant
condition
-99.9mm
~
+99.9mm
Refraction and earth curvature correction
OFF/0.14/0.2, selectable
Reflecting prism constant correction
-99.9mm to +99.9mm