Topcon ES-52 - Specifications; Telescope Specifications; Angle Measurement Specifications; Tilt Angle Compensation Specifications

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35. SPECIFICATIONS
Except where stated, the following specifications apply to all models of ES Series.
Telescope
Length: 171mm
Aperture: 45mm (EDM:48mm)
Magnification 30X
Image: Erect
Resolving power: 2.5"
Field of view 1°30'
Minimum focus: 1.3m
Focussing screw: 1 speed
Reticle illumination: 5 brightness levels
Angle measurement
Horizontal and Vertical circles type:
Rotary absolute encoder
Detecting
ES-52: 2 sides
ES-55: 1 side
Angle units: Degree/Gon/Mil (selectable)
Minimum display: 1" (0.0002gon/0.005mil)/5" (0.0010gon/0.02mil)
(selectable)
Accuracy:
ES-52: 2" (0.0006gon/0.010mil)
ES-55: 5" (0.0015gon/0.025mil)
(ISO 17123-3 : 2001)
Measuring time: 0.5 sec or less
Collimation compensation: On/Off (selectable)
Measuring mode:
Horizontal angle: Right/Left (selectable)
Vertical angle: Zenith/Horizontal/Horizontal ±90° /% (selectable)
Tilt angle compensation
Type: Liquid 2-axis tilt sensor
Minimum display: 1"
Range of compensation: ±6' (±0.1111 gon)
Automatic compensator: ON (V & H/V)/OFF (selectable)
Compensation constant: Can be changed
Distance Measurement
Measuring method: Coaxial phase shift measuring system
Signal source: Red laser diode 690nm
Class 3R