Spectra Precision Focus 35 3" Robotic Total Station

Quick Overview

Spectra Precision Focus 35-3 3-inch Robotic Total Station w/ Survey Pro V5.4.2
- Survey Pro Version 5.4.2 Field Software
- 2.4 GHz Radio
- Firmware Version T1.5.6
Item ID: X2184-L/T*
Condition: Refurbished
Warranty: 90 Day Exchange


* Spectra Precision Focus 35-3 3" Robotic Total Station [ID- X2184-L/T*]
         - Survey Pro Version 5.4.2 Field Software
         - 2.4 GHz Radio
         - Firmware Version T1.5.6
* Spectra 53018010-SPN Battery Charger
* Trimble USB Power Cable 23840019
* Spectra 71199035 Laser Adjustment Plate
* Antenna
* Battery Pack
* AC Adapter/Charger
* Power Cord
* User Manual On Cd-ROM
* Hard Carrying Case


Spectra Precision 35-3 3" Robotic Total Station

The Spectra Precision FOCUS 35 Series is a new range of motorized total stations providing high speed, accuracy and precision in measurement. The FOCUS 35 robotic instrument moves the power of the observer from the instrument to the range pole, improving efficiency. The speed of observation and precise positioning of the FOCUS 35 Robotic Total Station is provided by patented StepDrive™ motion technology, which controls the horizontal and vertical motion of the motors, eliminating the need for traditional motion locks.

he FOCUS 35 is available in 1”, 2”, 3” or 5” accuracies and is controlled by the Spectra Precision Survey Pro™ field software using an onboard Windows CE touchscreen interface. The FOCUS 35 is also designed to be controlled externally by Spectra Precision Ranger™, Nomad™, or T41® data collectors running Spectra Precision Survey Pro field software,  Spectra Precision Layout Pro or Spectra Precision FAST Survey on the Ranger or Nomad.

The speed of observation and precise positioning of the FOCUS 35 robotic total station is provided by patented StepDrive ™ technology. StepDrive controls the horizontal and vertical motion of the motors, so there is no need for traditional motion locks. Using the motorized drives it is possible to precisely turn to, and repeat angle measurements. This results in quick and reliable measurements which substantially increases your staking productivity.

The FOCUS 35 total station is combined with Spectra Precision Survey Pro field software, providing you with world class software solutions for any surveying application. An example of these features includes a unique robotic software technology that can be used when associating the FOCUS 35 with a low-cost GPS receiver and Survey Pro software. This combination of technologies allows the user to take full advantage of the Spectra Precision GeoLock ™ technology to keep locked on target.

The Spectra Precision GeoLock technique allows a robotic total station to perform an aided search for an optical target using an initial GPS position. The remote instrument can then be directed towards the robotic roving operator using the GPS position and a subsequent search is quickly performed to re-acquire the target at the robotic rover. This technique greatly reduces wasted time, improving your field work efficiency.


Angle measurement
(Standard deviation based on ISO 17123-3)
3" (1.0 mgon)
Angle reading (least count display) Standard: 1" (0.3 mgon)
Tracking: 2" (0.6 mgon)
Distance measurement
Accuracy to Prism (Standard deviation based on ISO 17123-4)
Standard: 2 mm + 2 ppm (0.007 ft + 2 ppm)
Tracking: 5 mm + 2 ppm (0.016 ft + 2 ppm)
Accuracy Reflectorless Mode Standard <300 m (984 ft): 3 mm + 2 ppm (0.01 ft + 2 ppm)
Standard >300 m (984 ft): 5 mm + 2 ppm (0.016 ft + 2 ppm)
Tracking: 10 mm + 2 ppm (0.033 ft + 2 ppm)
Measuring time Prism Standard: 2.4 sec.
Prism Tracking: 0.5 sec
Reflectorless Standard: 3–15 sec.
Reflectorless Tracking: 0.7 sec.
Range Prism Mode 1 Prism: 4000 m (13,123 ft)
3 Prisms: 7000 m (22,966 ft)
Foil Reflector 60 mm: 300 m (984 ft)
Range Reflectorless Mode
Good Normal Difficult
KGC2 (18%): 400 m (1,312 ft) KGC2 (18%): 350 m (1,148ft) KGC2 (18%): 300 m (984 ft)
KGC (90%): 800 m (2,625 ft) KGC (90%): 600 m (1,969 ft) KGC (90%): 400 m (1,312 ft)
Foil Reflector 60 mm: 1,000 m (3,280 ft) Foil Reflector 60 mm: 1,000 m (3,280 ft) Foil Reflector 60 mm: 800 m (2,625 ft)
Shortest possible range 1.5 m (4.9 ft)
Automatic level compensator
Type Dual-axis
Accuracy 0.5" (0.15 mgon)
Working Range ±5.5' (±100 mgon)
EDM Laser and Principle
Light source Laser Diode 660 nm
Principle Phase Shift
EDM Beam divergence
Horizontal 4 cm/100 m (0.13 ft/328 ft)
Vertical 3 cm/100 m (0.10 ft/328 ft)
Atmospheric Correction –150 ppm to 160 ppm continuously
Coarse Leveling
Electronic coarse leveling range ±3° (±3.3 gon)
Circular level in tribrach 8'/2 mm (8'/0.007 ft)
Drive system Spectra Precision® StepDrive™ system
Rotation time maximum 90º/sec (100 gon/sec)
Rotation time Face 1 to Face 2 3.7 sec
Positioning time180º (200 gon) 3.5 sec
Clamps and slow motions StepDrive driven, endless fine adjustment
Centering system 3-pin
Plummet Built-in optical plummet
Magnification: 2.4 x
Focusing Distance: 0.5 m to ∞ (1.6 ft to ∞)
Magnification 31x
Aperture 50 mm (1.96 in)
Field of View 1º30’
Focusing distance 1.5 m to ∞ (4.9 ft to ∞)
Illuminated crosshair Standard
Tracklight built in Standard
Trunnion axis height 196 mm (7.71 in)
Operating temperature –20 ºC to +50 ºC (–4 ºF to +122 ºF)
Dust and water proofing IP55
Power supply
Internal battery Li-Ion, 11.1 V/5.0 Ah
Operating time with one internal battery Approx. 6 hours
External foot connector USB cable connection and external power supply
Wireless communication Bluetooth
Instrument 5.0 kg (11.0 lb)
Tribrach 0.7 kg (1.54 lb)
Internal Battery 0.3 kg (0.66 lb)
Robotic Operation
Maximum Robotic Range 300 m to 800 m (984 ft to 2,625 ft)
Point precision at 200 m (656 ft) <2 mm (0.007 ft)
Maximum Search Distance 300 m to 800 m (984 ft to 2,625 ft)
Search Time (typical) 2–10 sec.
internal/external 2.4 GHz, frequency hopping, spread spectrum
GPS Search GeoLock (Spectra Precision GeoLock is available on data collectors after station setup)
GPS Search GeoLock™ 360º (400 gon)
Range Full robotic operation range
Control Units fixed on alidade
Face 1
Display 3.5" TFT color touch screen, 320x240 Pixel, backlight
Keyboard Alphanumeric keypad
Memory (data storage) 128 MB RAM, 1 GB Flash
Field App. Software Survey Pro and Layout Pro
Face 2
Display 6 lines, monochrome, 96x49 Pixel, backlight
Keyboard 4 Keys
Instrument Software Functions Change Face
Radio and Instrument settings
Measurement Value Display, Leveling
Certification Class B Part 15 FCC certification, CE Mark approval. C-Tick. Laser safety IEC 60825-1 am2:2007 Prism Mode: Class 1 Reflectorless/Laser Pointer: Class 3R laser Bluetooth type approvals are country specific