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 | Electronic Theodolites ETH-500 | Series Specification |
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| | Model | | ETH-502 | ETH-505 | ETH-510 | ETH-520 | | Telescope | Imaging | | Erect image | | | | | Objective aperture | | 45 mm | | | | | Magnification | | 30 x | | | | | Resolution | | ≤ 3” | | | | | Field of view | | 1° 20’ | | | | | Shortest focusing distance | | 1.35 m | | | | | Stadia multiplication constant | | 100 | | | | | Stadia addition constant | | 0 | | | | Angle Measuring | Angle measuring mode | | Absolute encoder | | | | | Angle measuring accuracy | 2" | 5" | 10" | 20" | | | Angle display | 1"/5" | 1"/5" | 5"/10" | 10"/20" | | | Angle unit | | 360°/400G | | | | Compensator | Tilt sensor | | Automatic vertical compensation | | | | | Tilt compensator | Yes | Yes | No | No | | | Soft switch | ON/OFF | ON/OFF | - - | - - | | | Compensation range | | ± 3’ | | | | Display unit | Two-sided | | Two-sided | | | | Optical plummet Image | Erect | | Erect | | | | | Magnification | | 3 x | | | | | Angle of vision | | 3° | | | | | Focusing range | | 0.5 m ~ ∞ | | | | | Sensitivity of tubular vial mm | 30”/2 | 30”/2 | 40”/2 mm | 40”/2 mm | | | Sensitivity of circular vial | | 8’/2 mm | | | | Dust & Water Protection | | | IP44 | | | | Type of base | | | Detachable | | | | Power supply | Battery | | 4 x single three (AAA) type dry battery | | | | Ambient temperature | For operation | | -20°C - +50°C | | | | Weight | Instrument | | 4.5 kg | | | | Measurements | Carrying case | | 1.9 kg | | | | | Instrument | | W 175 mm x L 170 mm x H 334 mm | | | | | Carrying case | | W 330 mm x L 450 mm x H 220 mm | |
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