Topcon DT-305L Digital Theodolite

• Length 152 mm
• Aperture 45 mm
• Magnification 30X
• Image Erect
• Field of view 1°30’ (26 m/1,000 m)
• Resolving power 2.5″
• Minimum focus 1.0 m
• Stadia ratio 100
• Stadia constant 0

Angle measurement

• Method Rotary absolute encoder

Detecting

• Horizontal: 1 sides
• Vertical: 1 sides
• Minimum display : 1″ (0.0002 gon/0.01 mil)/ 5″ (0.001 gon/0.1 mil) (selectable)
• Accuracy*1 5″

Display

• Unit : 2 sides

Tilt angle compensation

• Type Automatic vertical compensator
• Range of compensation ±3′ (±0.0555 gon)
• Compensation constant Can be changed (compensation is done at the same time with vertical angle 0 point)

Optical plummet

• Magnification 3X
• Minimum focus 0.5 m

Sensitivity of levels

• Circular level 10’ /2 mm
• Plate level 30″/ 2 mm

• Operating temperature range -20 to 50°C (-4 to 122°F)*2
• Storage temperature range -30 to 60°C (-22 to 140°F) (no condensation)

Environmental durability

• Dust and water protection IP66 (IEC 60529: 2001)

Power Supply (Standard)

• Power source 4 AA alkaline batteries

Working duration at 20°C (Standard)

• Theodolite only about 230 hour
• Laser only about 80 hours
• Theodolite and laser about 55 hours

Power Supply (Option)

• Power source BDC71 (Optional accessory)

Working duration at 20°C (Option)

• Theodolite only about 300 hours
• Laser only about 100 hours
• Theodolite and laser about 70 hours

Tribrach

• Type Detachable

Laser-pointer

• Signal source – Red laser diode (633 nm
• Maximum output 0.6 mW
• Laser Class Class 2
• Laser beam range 50 m (in daylight)

Others

• Size (with handle) 173 (D) X 181 (W) X 318 (H) mm (Display on both sides)
• Weight 4.1 kg (9.04 lb) (with batteries and battery holder)