Spectra Precision FOCUS 35 User Manual

User Guide

Spectra Precision® FOCUS® 35

Total Station

Version 1.05

Revision D
June 2017
Part Number 77781035

Contact details

Spectra Precision
10368 Westmoor Drive
Westminster, CO 80021, USA

U.S.A.+1-720-587-4700 Phone
888-477-7516 (Toll free in USA)

www.spectraprecision.com

Copyright and Trademarks

© 2005-2017, Trimble Inc. All rights reserved. Spectra Precision is a
Division of Trimble Inc. Spectra Precision and the Spectra Precision
logo are trademarks of Trimble Inc. or its subsidiaries. GeoLock,
LockNGo, Ranger, T41, and StepDrive are unregistered trademark of
Trimble Inc. EPOCH and FOCUS are trademarks of Spectra Precision.
Survey Pro is a trademark of Spectra Precision. Microsoft, ActiveSync,
Windows, Windows Mobile, and Windows Vista are either registered
trademarks or trademarks of Microsoft Corporation in the United
States and/or other countries. The Bluetooth word mark and logos are
owned by the Bluetooth SIG, Inc. and any use of such marks by Trimble
Inc. is under license. All other trademarks are the property of their
respective owners.

Release Notice

This is the June 2017 release version 1.05 of the Spectra Precision
FOCUS 35 Total Station User Guide, P/N 77701035. It applies to the
Spectra Precision FOCUS 35 total station.

The following limited warranties give you specific legal rights. You may
have others, which vary from state/jurisdiction to state/jurisdiction.

Product Warranty Information

For applicable product warranty information, please refer to the
Warranty Card included with this Spectra Precision product, or consult
your Spectra Precision dealer.

Updates and new products

To obtain information regarding updates and new products, contact
your Spectra Precision distributor or visit the Spectra Precision website
at www.spectraprecision.com.

Notices

AUSTRALIA AND NEW ZEALAND

This product complies with the regulatory requirements
of the Australian Communications and Media Authority
(ACMA) EMC framework, thus satisfying the
requirements for RCM-Marking and sale within Australia
and New Zealand.

CANADA

This Class A digital apparatus complies with Canadian ICES-003. This
digital apparatus does not exceed the Class B limits for radio noise
emissions from digital apparatus as set out in the radio interference
regulations of the Canadian Department of Communications.

Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant les limites applicables aux appareils
numériques de Classe A prescrites dans le règlement sur le
brouillage radioélectrique édicté par le Ministère des
Communications du Canada.

This device has been designed to operate with an antenna having a
maximum gain of 2.0 dBi. Antenna having a higher gain is strictly
prohibited per regulations of Industry Canada. The required antenna
impedance is 50 ohms. To reduce potential radio interference to other
users, the antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (EIRP) is not more than that
required for successful communication. Operation is subject to the
following two conditions: (1) this device may not cause interference,
and (2) this device must accept any interference, including
interference that may cause undesired operation of the device.

Devices marked with Part Numbers 78200035 (78211035), 78201035
(78311035) and 78202035 (78511035) contain radio module with

IC: 4492A-2410G.
The device contains a Bluetooth radio module with IC: 9102A-TJFBM.

E

UROPE

This product has been tested and found to comply with
relevant requirements pursuant to European Council
directives, thereby satisfying the requirements for CE
marking and sale within the European Economic Area
(EEA).

Applicable directives:
RED Directive 2014/53/EU

RoHS Directive 2011/65/EU
The compliance to the applicable requirements is detailed in the

official Declaration of Conformity document, which is filed at Spectra
Precision.

For product recycling instructions and more information, please go to

www.spectraprecision.com/ev.shtml.

Recycling in Europe: To recycle Spectra Precision WEEE
(Waste Electrical and Electronic Equipment, products
that run on electrical power.), Call [phone], and
ask for the „WEEE Associate“. Or, mail a request for
recycling instructions to:
Spectra Precision Europe BV
c/o Menlo Worldwide Logistics
Meerheide 45
5521 DZ Eersel, NL

USA

Class A Statement – Notice to Users. This equipment has been tested
and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to
provide reasonable protection against harmful interference in a
commercial installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to
radio communication. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the
following measures:

– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and the receiver.
– Connect the equipment into an outlet on a circuit different from

that to which the receiver is connected.

– Consult the dealer or an experienced radio/TV technician for help.
Changes and modifications not expressly approved by the

manufacturer or registrant of this equipment can void your authority
to operate this equipment under Federal Communications Commission
rules

The antenna used for this transmitter must be installed to provide a
separation distance of at least 20 cm from all persons and must not be
co-located or operating in conjunction with any other antenna or
transmitter:

Devices marked with Part Numbers 78200035 (78211035), 78201035
(78311035) and 78202035 (78511035) contain radio module with FCC
ID: HSW- 2410G.

The device contains a Bluetooth radio module with
FCC ID: YK5-TJFBM.
.

AIWAN

T

Battery Recycling Requirements
The product contains a removable Lithium-ion battery.

Taiwanese regulations require that waste batteries are
recycled.

FOCUS 35 TOTAL STATION USER GUIDE

2

Important Information

Before using the Spectra Precision® FOCUS® 35 total station, make sure that you understand this
user guide, as well as all equipment and job site safety requirements.

Safety Information

• Instruments and original accessories from Spectra Precision must only be used for the intended

purpose.

• Operate the instrument only in compliance with the operating conditions specified. Do not point

the telescope directly at the sun.

• Do not use the instrument and accessories in rooms with danger of explosion.

• Protect operator and instrument sufficiently at the site of measurement (e.g., construction site,

roads, etc.). Observe any relevant national regulations and the Road Traffic Act.

• Do not carry out surveying work in a thunderstorm to avoid being struck by lightning.

• Do not modify the instrument.

• Do not use the instrument if there are any visible damages.

• Only authorized Spectra Precision service centers have permission to repair this product.

Laser Safety

This equipment has been tested and found to comply with IEC 60825-1:2014 and IEC 60825-1:2007
and 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated July26,

2007.

WARNING – Use of controls or adjustments or performance of procedures other than those

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specified herein may result in hazardous LED or laser radiation exposure. As with any bright
light source, such as the sun, electric welding arcs or arc lamps, common sense applies.
DO NOT look into the laser aperture when the laser is on. For further information regarding
laser safe use of laser, refer to IEC standard 60825-1:2014.

Note – For security reasons the Spectra Precision
regulations of the IEC 60825-1:2014 and the warnings and recommendations of the German
industrial regulation BGV B2 (updated print version April 2007).

In accordance with this German regulation, a responsible person must be identified for laser safety.
All absolute vital power to fulfill this task has to be transferred to this person.

Please ensure that you are aware of any national laws and regulations applicable in the country of
operation, concerning laser safety precautions and any other occupational safety and health issues
that may be encountered. All national laws and regulations take precedence over foreign or
international standards.

®

FOCUS

®

35 user guide describes the warnings and

FOCUS 35 TOTAL STATION USER GUIDE

3

Important Information

Laser Safety Questions

Address any questions you may have about laser safety to:

Spectra Precision
5475 Kellenburger Road
Dayton, OH USA 45424-1099
Attention: Laser Safety Officer, Quality Assurance Group
Phone [phone] ext 824 or [phone]
Fax [phone]

Spectra Precision FOCUS 35 Total Station

The Spectra Precision FOCUS 35 Total Station is a CLASS 3R LASER PRODUCT and contains different
light sources.

Distance Measurement and Laser Pointer

The Distance Measuring Unit in reflectorless mode and in Laser Pointer mode produces visible Laser
light emerging at the centre of the telescope objective. Product conforms to Class 3R in accordance
with IEC 60825-1:2014 and IEC 60825-1:2007 “Safety of laser devices”. The product complies with
FDA 21CFR1040.10 and 1040.11.

Beam divergence 0.4 mrad

Modulation frequency 400 MHz*

Max. Output power <5 mW

Wavelength 660 nm

Measuring uncertainty ±5%

*Not valid for Laser Pointer

FOCUS 35 TOTAL STATION USER GUIDE

4

Important Information

WARNING – The use of Laser Class 3R equipment can be dangerous for the eyes. The risk for

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eye damage is minimized through the radiation limit of 5 mW (FOCUS 35 at 660 nm).
Do not stare directly into the beam.
Do not direct the beam towards reflective surfaces (prisms, mirrors, metallic surfaces, or
windows) or towards other people.
Precautions should be taken to ensure that persons do not look with an optical instrument
directly into the beam.
Dazzle flash-blindness and afterimages may be caused by a beam from a Class 3R laser
product, particularly under low ambient light conditions. This may result in temporary
disturbance of vision. Do not operate any equipment or vehicles if such disturbance of vision
occurs.
In a distance of 80 m (262 ft) from an instrument the radiation conforms to Laser Class 1. In
Laser Class 1 a direct intrabeam viewing is not hazardous.
Take the following precautions while using a Class 3R instrument in order to minimize the risks
of personal injury:

- Only use the instrument’s Laser Class 3R function when absolutely necessary.

- Set up the laser beam above or below human eye level wherever practicable.

- Make sure that the area where the Class 3R instruments are used is marked with
appropriate laser warning signs.

- Do not measure towards prisms up to 1,000 m (3,280 ft) in reflectorless mode.

- Make sure that unauthorized personnel do not get access to the instrument.

The Distance Measuring Unit in prism mode produces visible laser light emerging at the center of the
telescope objective. Product conforms to Class 1 in accordance with IEC 60825-1:2014 and
IEC 60825-1:2007 “Safety of laser devices”.

Max. output power < 20 µW

WARNING – Class 1 laser products are safe in normal use under reasonable conditions of

C

operation and are not harmful to the eyes provided that the products are used and maintained
in accordance with the instructions.

Tracklight

Tracklight produces visible LED light emerging from an objective above/below the telescope
objective. LEDs are not in scope of IEC 60825-1:2014 “Safety of laser devices”. Product is in
accordance with IEC 62471: 2006.

FOCUS 35 TOTAL STATION USER GUIDE

5

Important Information

Beam divergence 70 mrad

Max. output power 0.4 mW (red) and 0.2 mW (green)

Wavelength 645 nm (red) and 520 nm (green)

Measuring uncertainty ± 5%

LockNGo Tracker

The LockNGo™ Tracker produces an invisible laser beam emerging at the center of the telescope
objective. Conforms to Class 1 in accordance with IEC 60825-1:2014 and IEC 60825-1:2007 “Safety of
laser devices”. The product complies with FDA 21CFR1040.10 and 1040.11.

Beam divergence (Hz x V) 40 mrad x 30 mrad

Pulse duration 144

Max. pulse frequency 109 Hz

Max. Peak Power 2.22 mW

Max. Mean Power 0.035 mW

Wavelength 850 nm

Measuring uncertainty ± 5%

μs

For instrument labeling, see Laser Information, page 36.

Battery Safety

WARNING – Do not damage the rechargeable Lithium-ion battery. A damaged battery can

C

cause an explosion or fire, and can result in personal injury and/or property damage.
To p r eve n t i nju ry or d am age :

- Do not use or charge the battery if it appears to be damaged. Signs of damage include, but
are not limited to, discoloration, warping and leaking battery fluid.

- Do not expose the battery to fire, high temperature, or direct sunlight.

- Do not immerse the battery in water.

- Do not use or store the battery inside a vehicle during hot weather.

- Do not drop or puncture the battery.

- Do not open the battery or short-circuit its contacts.

FOCUS 35 TOTAL STATION USER GUIDE

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Important Information

WARNING – Avoid contact with the rechargeable lithium-ion battery if it appears to be

C

leaking. Battery fluid is corrosive, and contact with it can result in personal injury and/or
property damage.
To p r eve n t i nju ry or d am age :

- If the battery leaks, avoid contact with the battery fluid.

- If the battery fluid gets into your eyes, immediately rinse your eyes with clean water and seek
medical attention. Do not rub your eyes!

- If battery fluid gets onto your skin or clothing, immediately use clean water to wash off the
battery fluid.

WARNING – Charge and use the rechargeable Lithium-ion battery only in strict accordance

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with the instructions. Charging or using the battery in unauthorized equipment can cause an
explosion or fire, and can result in personal injury and/or equipment damage.
To p r eve n t i nju ry or d am age :

- Do not charge or use the battery if it appears to be damaged or leaking.

- Charge the lithium-ion battery only in a Spectra Precision product that is specified to charge
it. Be sure to follow all instructions that are provided with the battery charger.

- Discontinue charging a battery that gives off extreme heat or a burning odor.

- Use the battery only in Spectra Precision equipment that is specified to use it.

- Use the battery only for its intended use and according to the instructions in the product
documentation.

Environmental Information

NOTICE FOR Spectra Precision’s EUROPEAN UNION CUSTOMERS

Spectra Precision is pleased to announce a new recycling program for our European Union
customers. At Spectra Precision, we recognize the importance of minimizing the
environmental impacts of our products. We endeavor to meet your needs, not only when
you purchase and use our products, but also when you are ready to dispose of them. That
is why Spectra Precision is actively pursuing, and will continue to pursue, the expanded
use of environment friendly materials in all its products, and why we have established a
convenient and environmentally friendly recycling program.

As Spectra Precision makes additional recycling facilities available for your use, we will post their
locations and contact information to our Recycling Instructions web page.

For product recycling instructions and more information, please go to

www.spectraprecision.com/weee_rohs.aspx.

To recycle Spectra Precision WEEE in Europe, do one of the following:

• Call [phone], and ask for the “WEEE Associate”

• Mail a request for recycling instructions to:

Spectra Precision
c/o Menlo Worldwide Logistics
Meerheide 45
5521 DZ Eersel, NL

FOCUS 35 TOTAL STATION USER GUIDE

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Contents

Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Laser Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Laser Safety Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Spectra Precision FOCUS 35 Total Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Distance Measurement and Laser Pointer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Tracklight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LockNGo Tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Battery Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Environmental Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2 Inspection, Care, and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Instrument Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Instrument Case Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Instrument Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Care and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Care of the Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Applying a Screen Protector for the Face 1 Screen (if fitted). . . . . . . . . . . . . . . . . . . . . . .17

Removing Moisture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Transporting the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

3 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Battery Safety and Environment Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Checking the Instrument Battery Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Charging the Instrument and the Radio Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Inserting the Main Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Inserting the Face 1 Battery (if Available) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Suspend Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Optical Plummet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Trigger Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Control Unit Face1 (if fitted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

Control Unit Face2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Telescope Lens rain cover / sun shade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Transferring Data Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Setting Up and Running ActiveSync technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Disconnecting ActiveSync . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Laser Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Spectra Precision FOCUS 35 Total Station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

4 Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

FOCUS 35 TOTAL STATION USER GUIDE

8

Setup Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Measurement Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

Starting the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

Starting and Settings via Face1 Control Unit (if fitted) . . . . . . . . . . . . . . . . . . . . . . . . . .43

First Steps in Spectra Precision Survey Pro software . . . . . . . . . . . . . . . . . . . . . . . . . . .44

Lookup and register Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

Spectra Precision Survey Pro Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Starting and Settings via Face2 Control Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

PIN code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

Activating or changing the PIN code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Using the PIN code to unlock the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

PUK code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

Face2 Display while using Spectra Precision Survey Pro in different Instrument Versions. . . . . . .53

Main Menu Face2 - Information and Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Instrument Adjustment and Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Compensator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

Optical (HA/VA) Collimation and Trunnion Axis Tilt. . . . . . . . . . . . . . . . . . . . . . . . . . . .64

LockNGo Tracker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

Adjustment Routines in Survey Pro software (if available). . . . . . . . . . . . . . . . . . . . . . . .64

The Laser Pointer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Optical Plummet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

Tribrach Circular Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73

Measuring the Instrument Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

Pre Measurement Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Connecting to an External Data Collector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Connecting with Cable - Instrument Version StepDrive and LockNGo . . . . . . . . . . . . . . . . .77

Connecting with Radio - Instrument Versions Robotic and RX. . . . . . . . . . . . . . . . . . . . . .79

5 Instrument Operation Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Conventional Measurements with StepDrive Motor System. . . . . . . . . . . . . . . . . . . . . . . . .81

LockNGo Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

GeoLock Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81

Robotic Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

6 Instrument Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Angle Measuring Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Correction for Mislevelment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Correction for Collimation Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85

Correction for Trunnion Axis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

Averaging Measurements to Reduce Sighting Errors . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Distance Measuring Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Beam Divergence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

Tracklight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

StepDrive Motor System and Focus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

StepDrive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93

Focus System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

LockNGo Tracking Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95

Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Robotic configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

Internal Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

FOCUS 35 TOTAL STATION USER GUIDE

9

Second Internal Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

External Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .97

External Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

7 Accessories and Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Rod and Prisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Spectra Precision Standard Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Spectra Precision 360 Degree Prism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Robotic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

External Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Cables for External Power Supply and Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Cable for External Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Cable for Data Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Control Unit Screen Protector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108

Telescope Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Steep Sighting Prism. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Transport Case Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Carrying Straps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

FOCUS 35 TOTAL STATION USER GUIDE

10

CHAPTER

1

Introduction 1

Welcome

Welcome to the Spectra Precision FOCUS 35

Total Station User Guide

how to set up and use the Spectra Precision®
FOCUS® 35 total station. Even if you have used
an optical Total Station before, Spectra Precision
recommends that you spend some time reading
this manual to learn about the special features
of this product.

. This manual describes

Technical Assistance

If you have a problem and cannot find the
information you need in the product
documentation, contact your local distributor.

Related Information

For more information about this product, please
visit our web site at www.spectraprecision.com.

Product Registration

To obtain information regarding updates and new products, contact your local Spectra Precision
distributor, or go to the Spectra Precision web site, www.spectraprecision.com.

FOCUS 35 TOTAL STATION USER GUIDE

11

CHAPTER

2

Inspection, Care, and Maintenance 2

In this chapter:

 Inspecting the Container

 Instrument Case

 Care and Maintenance

 Transporting the Instr u m e nt

 Servicing

FOCUS 35 TOTAL STATION USER GUIDE

12

2 – Inspection, Care, and Maintenance

❽

❾
❺

❿

❷

❼

❻

❹

⓫

❶

❸

Inspecting the Container

Inspect the shipping container. If the container arrives in poor condition, examine the equipment for
visible damage. If damage is found, immediately notify the carrier and your Spectra Precision sales
representative. Keep the container and the packing material for the carrier to inspect.

Instrument Case

When unpacking the instrument, check that all ordered items are received. Below is an example of
where all items can be placed in the instrument case.

Instrument Case Contents

FOCUS 35 TOTAL STATION USER GUIDE

13

2 – Inspection, Care, and Maintenance

Item Description

❶ Spectra Precision FOCUS 35 instrument
❷ Instrument rain cover
❸ Instrument case keys (x2)
❹ User guide CD; Warranty Card; WEEE information; Certificate; Notice to users in France**
❺ Allen key for optical plummet (1.3mm), Allen key for EDM/Coarse sight (1.5 mm) and adjustment key

for tribrach bubble

❻ Data Collector*
❼ Cable between instrument and computer*; Cable between instrument and USB flash drive**
❽ Telescope lens rain cover / sun shade
❾ Instrument batteries** (space for 3 batteries)
❿ USB flash drive**
⓫ Getting started guide**; Laser adjustment target; Screen protectors

Note – Some of the items in the case are optional.

* Not all Data Collectors are designed to fit this space.

** Optional accessory item

CAUTION – If the instrument is equipped with an optional DIN adapter for DIN tribrach, the

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DIN tribrach must be removed before the instrument is placed in the instrument case.

FOCUS 35 TOTAL STATION USER GUIDE

14

2 – Inspection, Care, and Maintenance

Contains
FCCID: HSW-2410G

IC:4492A-2410G

30-2”

Ser.no:
87000001

Part.no:
78200035

FCCID: YK5-TJF30

IC:9102A-TJF30

TrimbleElectronic Products (Shanghai) Co., Ltd.

311Fute (M) Road, 3/F; Wai Gaoqiao

Shanghai200131, China

N324

Instrument Versions

There are four different instrument types available: StepDrive™, LockNGo™, RX, and Robotic. For
more information please read the Instrument Operation Methods, page 80. The instrument labels
are on the bottom of the instrument.

Instrument types

FOCUS 35 Robotic 1''

FOCUS 35 Robotic 2"

FOCUS 35 Robotic 3"

FOCUS 35 Robotic 5"

FOCUS 35 RX 2"

FOCUS 35 RX 3"

FOCUS 35 RX 5"

FOCUS 35 LockNGo 1"

FOCUS 35 LockNGo 2"

FOCUS 35 LockNGo 3"

FOCUS 35 LockNGo 5"

FOCUS 35 StepDrive 1"

FOCUS 35 StepDrive 2"

FOCUS 35 StepDrive 3"

FOCUS 35 StepDrive 5"

FOCUS 35 TOTAL STATION USER GUIDE

15

2 – Inspection, Care, and Maintenance

Care and Maintenance

WARNING – Do not remove the instrument cover from the instrument.

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A Spectra Precision FOCUS 35 Total Station is designed to withstand normal electromagnetic
disturbance from the environment, but it contains circuits that are sensitive to static
electricity. If an unauthorized person opens the instrument cover, the function of the
instrument is not guaranteed and the warranty is invalidated.

The Spectra Precision FOCUS 35 Total Station is designed and tested to withstand field conditions,
but like all precision instruments, it requires care and maintenance.

Take the following steps to get the best results from the instrument:

• Do not subject the equipment to rough jolts or careless treatment.

• Keep the lenses and reflectors clean. Use only lens paper or other material that is designed for

cleaning optical equipment. A cleaner with a solution of pure water and 20-30% 2-Propanol
specified with evaporation residue <5mg/l is recommended.

• Keep the instrument protected and in an upright position, preferably in the instrument case.

• Do not carry the instrument while the instrument is mounted on a tripod. Doing so can damage

the tribrach screws.

• Do not carry the instrument by the telescope barrel, please use the handle.

• When you need extremely precise measurements, make sure that the instrument has adapted to

the surrounding temperature. Significant variations in instrument temperature can affect
precision.

Cleaning

Be very careful when cleaning the instrument, especially when removing sand or dust from lenses
and reflectors. Never use a coarse cloth, a dirty cloth, or hard paper to clean the instrument. Spectra
Precision recommends that you use anti-static lens paper, a cotton wad, or a lens brush.

CAUTION – Never use strong detergents such as benzine or thinners on the instrument or the

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instrument case.

Care of the Screens

Clean the screens with a dust-free cloth and gently wipe the screen. Use the provided dust-free cloth
in the screen protector package.

CAUTION – Do not use abrasive cleaners and do not apply any Cleaning Solution directly on

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the screen.

FOCUS 35 TOTAL STATION USER GUIDE

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2 – Inspection, Care, and Maintenance

Applying a Screen Protector for the Face 1 Screen (if fitted)

Before applying a screen protector please read the screen protector installation guide/information
provided inside the screen protector package.

Use the screen protectors (ULTRA-Clear or ANTI-Glare) included in the instrument case to keep the
touchscreen clean and protected.

To apply a screen protector:

• Clean the display thoroughly with the provided dust-free cloth.

• Peel the backing from the screen protector.

• Align the edge, and then drop the remainder onto the display.

• Use the provided installation card, if necessary, to squeeze the air from underneath the screen

protector.

Ultra-Clear: Screen Protection with 99% visual transparency.

ANTI-Glare: Screen Protection with a perfect blend of anti-glare and optical clarity.

Removing Moisture

If the instrument has been used in damp weather, take the instrument indoors and remove the
instrument from the instrument case. Leave the instrument to dry naturally. If condensation forms
on the lenses, allow the moisture to evaporate naturally. Leave the carrying case open until all
moisture has evaporated.

Transporting the Instrument

Always transport the instrument in a locked instrument case. For longer trips, transport the
instrument in the instrument case and inside the original shipping container.

Servicing

Note – There are no user-serviceable parts on the Spectra Precision FOCUS 35 Total Station.

Spectra Precision recommends that you take the instrument to an authorized service center for
service and calibration once a year. This is to guarantee that the specified accuracies are maintained.

When you send the instrument to a service center, clearly write the name of the sender and the
receiver on the instrument case. If repairs are required, enclose a note in the instrument case. The
note should clearly describe any fault or symptoms, and indicate that servicing is required.

FOCUS 35 TOTAL STATION USER GUIDE

17

CHAPTER

3

Getting Started 3

In this chapter:

 Power Supply

 Instrument Description

 Connecting the Instrument to an Office

Computer

 Laser Information

FOCUS 35 TOTAL STATION USER GUIDE

18

3 – Getting Started

Power Supply

Before charging or using a battery it is important that you read and understand the battery safety
and environment information.

Battery Safety and Environment Information

WARNING – Do not damage the rechargeable Lithium-ion battery. A damaged battery can

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cause an explosion or fire, and can result in personal injury and/or property damage. To
prevent injury or damage:

- Do not use or charge the battery if it appears to be damaged. Signs of damage include, but
are not limited to, discoloration, warping, and leaking battery fluid.

- Do not expose the battery to fire, high temperature, or direct sunlight.

- Do not immerse the battery in water.

- Do not use or store the battery inside a vehicle during hot weather.

- Do not drop or puncture the battery.

- Do not open the battery or short-circuit its contacts.

WARNING – Avoid contact with the rechargeable lithium-ion battery if it appears to be

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leaking. Battery fluid is corrosive, and contact with it can result in personal injury and/or
property damage. To prevent injury or damage:

- If the battery leaks, avoid contact with the battery fluid.

- If battery fluid gets into your eyes, immediately rinse your eyes with clean water and seek
medical attention. Do not rub your eyes!

- If battery fluid gets onto your skin or clothing, immediately use clean water to wash off the
battery fluid.

WARNING – Charge and use the rechargeable Lithium-ion battery only in strict accordance

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with the instructions. Charging or using the battery in unauthorized equipment can cause an
explosion or fire, and can result in personal injury and/or equipment damage. To prevent
injury or damage:

- Do not charge or use the battery if it appears to be damaged or leaking.

- Charge the lithium-ion battery only in a Spectra Precision product that is specified to charge
it. Be sure to follow all instructions that are provided with the battery charger.

- Discontinue charging a battery that gives off extreme heat or a burning odor.

- Use the battery only in Spectra Precision equipment that is specified to use it.

- Only use the battery for its intended use and according to the instructions in the product
documentation.

Battery Disposal

Before disposal, discharge the battery.

Dispose of the used battery in an environmentally sensitive manner, according to local and national
regulations, see also Environmental Information, page 7.

FOCUS 35 TOTAL STATION USER GUIDE

19

3 – Getting Started

Button

Power gauge

Checking the Instrument Battery Power Supply

To check the power supply in the Spectra Precision FOCUS 35 Total Station battery using the built in
battery gauge, press the button on the side of the battery:

When you press the button, four LEDs on the battery show the power level. Each LED corresponds to
a power level of 25 % so that when the power level is at 100 %, all four LEDs are lit. If the battery is
completely discharged, all LEDs are unlit.

When the button is pushed and all the LEDs flash, the battery needs to be reconditioned in the
battery charger.

When the battery capacity is between 0 and 10 % one LED is flashing. A battery that has a flashing
LED might not be able to start the instrument. If started, with a battery that has a flashing LED, the
operating time will be between 5 and 15 minutes.

Charging the Instrument and the Radio Batteries

The batteries are supplied partially charged. Charge the batteries completely before using it for the
first time.

• To charge the batteries, use only the charger that is recommended by Spectra Precision for

charging the lithium-ion battery. The charger can charge instrument and radio batteries. It can be
powered by mains power or from a car battery (socket / cigarette lighter adaptor). The charger
can be used either in car or office.

• Before charging the batteries please read the charger instruction information that was provided

with the charger package.

FOCUS 35 TOTAL STATION USER GUIDE

20

3 – Getting Started

AC/DC Converter

Radio Battery

Via country specific

adapter to mains power

DC Input

• Charge the battery before using the total station if the equipment has been stored for longer than

six months.

FOCUS 35 TOTAL STATION USER GUIDE

21

3 – Getting Started

Press

Open

Insert battery with battery
gauge to the top

Inserting the Main Battery

The Spectra Precision FOCUS 35 Total Station internal battery fits into the battery compartment on
the side of the instrument. This battery can easily be removed and replaced.

To insert the battery:

1. Press gently on the battery release button to open the battery compartment door.

2. Slide the battery into the battery compartment with the battery connectors positioned towards

the bottom of the instrument.

FOCUS 35 TOTAL STATION USER GUIDE

22

3 – Getting Started

Inserting the Face 1 Battery (if Available)

On some Spectra Precision FOCUS 35 Total Station models a second battery fits into the Face 1
battery compartment. This battery can easily be removed and replaced.

To insert the battery:

1. Press gently on the two battery release buttons on either side of the compartment to open the

battery compartment door.

2. Slide the battery into the battery compartment door with the battery connectors positioned

facing upwards.

3. Close the battery compartment door, ensuring that both battery release buttons click into place.

FOCUS 35 TOTAL STATION USER GUIDE

23

3 – Getting Started

Suspend Mode

The Spectra Precision FOCUS 35 Total Station is equipped with an internal support module (support
capacitor) that enables you to suspend (“hotswap” or replace) the instrument battery within a
period of 30 seconds from the time you open the battery door.

To resume, press the power button for about one second, until you hear one single beep.

The internal support module is always charged when the instrument is powered on.

If you leave the Spectra Precision FOCUS 35 Total Station idle, it goes into suspend mode after 120
minutes by default.

If the Spectra Precision FOCUS 35 Total Station has not been restarted when the suspend period
(default 120 minutes) has elapsed, the instrument powers down and has to reboot when started
again.

If the internal support module runs low on power the Spectra Precision FOCUS 35 Total Station
powers down sooner. Fully charged and under normal conditions, the internal support battery
should have capacity for about five suspend sequences.

For more information please read Power Management, page 95.

FOCUS 35 TOTAL STATION USER GUIDE

24

3 – Getting Started

❶

❺

❻

❸

❷

❹

Instrument Description

This section describes the instrument controls. Spectra Precision recommends that you take some
time to familiarize yourself with the names and the locations of the controls.

The following image shows the Operator’s view of the Spectra Precision FOCUS 35 Total Station.

Item Description

❶ Coarse sight
❷ Focusing servo knob
❸ Vertical motion servo knob
❹ Horizontal motion servo knob
❺ On/Off and Trigger key
❻ Stylus for touch screen
❼ Face1 Control Unit or optional Face 1 Battery Compartment
❽ Eyepiece

FOCUS 35 TOTAL STATION USER GUIDE

25

The following is the Front view of the Spectra Precision FOCUS 35 Total Station.

❶

❷

❸

❼

❹

❺

❻

3 – Getting Started

Item Description

❶ Radio antenna

Radio antenna not required in StepDrive and LockNGo models.

❷ Compartment for instrument battery
❸ Face2 Control Unit
❹ Optical plummet
❺ Optics for tracklight
❻ Coaxial optics for angle and distance measurements, tracker and laser pointer
❼ Connector for both communication (COM) and power (12 V)

FOCUS 35 TOTAL STATION USER GUIDE

26

3 – Getting Started

The following image shows the Connector Rubber Cap Placement.

Note – Please place the rubber cap in one of the shown directions. Another orientation will limit the
function to insert instrument into tribrach or to turn the instrument.

Optical Plummet

The instrument is equipped with an optical plummet, which has 2x magnification and a focusing
range of 0.5 m (1.6 ft) to infinity. The instrument can be positioned to an accuracy of

0.5 mm (0.02 in) at 1.5 m (49 ft) over a ground mark.

• To focus the crosshair, rotate the eye-piece.

• To focus the optical plummet to the ground, push in or pull out the optical plummet.

For information on how to adjust the optical plummet, see Optical Plummet, page 72.

FOCUS 35 TOTAL STATION USER GUIDE

27

3 – Getting Started

❶

❷
❸

Trigger Key

The trigger key functions as an On/Off key (z). A LED in the trigger key indicates if the instrument
is turned on. A solid light indicates On and a flashing light indicates Suspend Mode and waiting for
connection, see also Power Management, page 95.

When a field application is running, the trigger key performs the same function as the
Measurement1 key (M) on the Face1 side and the Enter key (P) at the Face2 side.

Keys Description

M

z P

L Measurement2 - reflectorless measurement and recording

Measurement1 - definable

(Except the measurements in QuickShot menu without open job)

Control Unit Face1 (if fitted)

Data entry on the keyboard is similar to that of a mobile phone. The “A” button scrolls between
three different states of data entry: 123, ABC, and abc. Multiple presses on one key scrolls through
the letters on that key depending on which mode is currently selected.

The image shows the Control Unit Face1.

Item Description

❶ Quick Shot Menu
❷ Measurement 1
❸ Measurement 2

FOCUS 35 TOTAL STATION USER GUIDE

28

3 – Getting Started

Control Functions Control Unit Face1

In addition to data entry and the standard Windows® functions, the Control Unit has a number of
control functions that are Spectra Precision specific. These functions are described in the table
below.

Keys Function Description

M

L Measurement2 (in field software only)
R Quick Shot Menu (in field software only)

T + A C Toggle the backlight on/off
T + B K Disable/enable the touch screen
T + Q S Toggle the touch screen keyboard on/off
T + R I Switch to level bubble - in field software only
T + 7 Z Pop up the Windows taskbar
T + , + Enter a “-” or a “+” symbol
T + E Y Delete

Measurement1 (in field software only)

Operating System

The Spectra Precision FOCUS 35 Total Station runs the Microsoft®Windows®CE .Net operating
system.

Data Storage

The Spectra Precision FOCUS 35 Total Station has two kinds of memory:

• 128 MB RAM

RAM is volatile, and you risk losing data if the power fails.

• 1 GB NAND flash storage memory

The NAND flash storage memory is non-volatile, and protects valuable data and software against
memory loss.

Entering Information

Tap on c e on t h e Input Panel icon that is located in the Windows CE Taskbar. The icon is selection
related.

FOCUS 35 TOTAL STATION USER GUIDE

29

Input Panel menu

The Input options are Keyboard, Keypad or Tr a n s c r i b e r :

• Keyboard — allows you to input data as if you were typing on a physical keyboard

• Keypad — has larger keys than the keyboard

3 – Getting Started

• Tr a n s c r i b e r — is a program that converts your handwritten notes to text

Note – The Keyboard/Keypad/Transcriber last used will be the default whenever the Input Panel
appears or is tapped. To change the default use the Input Panel icon at the CE Taskbar, or tap the
Start menu and select Settings/Control Panel/Input Panel and choose the desired option.

Tou ch Sc re e n

The LCD screen in Face1 can be viewed easily both in direct sunlight and in overcast conditions. It
also incorporates a touch interface for navigation. Tap elements on the screen with a stylus or your
finger.

Calibrating the Touch Screen

If the touch screen does not respond properly when you tap it, recalibrate it as follows:

1. Tap the Start menu and select Settings / Control Panel / Stylus. The Stylus Properties appears.

2. To recalibrate, tap Recalibrate in the Calibration tab.

3. Follow the prompts on the screen.

Disabling the Touch Screen

To clean the touch screen during a survey, press T + B [S] to disable it. To enable the touch screen
again, press T + B.

FOCUS 35 TOTAL STATION USER GUIDE

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3 – Getting Started

Display Backlight Face1 Control Unit

The display light is active by default and can be toggled on/off by pressing T + A [C]. To change
backlight brightness and save battery life

1. Tap the Start menu and then select Settings / Control Panel / Display Properties / Backlight.

2. Adjust Backlight brightness and select when the instrument has to turn off the backlight

automatically.

3. Tap OK.

Note – Settings for display light Face2 and reticle illumination see Settings Face2 Display Backlight,

Reticle Illumination and Tracklight, page 48.

Settings Time and Date

1. Tap Start menu and then select Settings / Control Panel / Date/Time.

2. Change the date and time as required.

3. To accept the new settings, tap OK. To cancel, tap B.

Note – When you attach the instrument to your computer using Microsoft
the time and date are automatically updated.

®

ActiveSync® technology,

Control Unit Face2

The Face2 control unit is a graphical display with a built-in backlight and four control buttons.

Function Description

U
N
O
P

Change Face

Scroll Up

Scroll Down

Enter

FOCUS 35 TOTAL STATION USER GUIDE

31

3 – Getting Started

When a secondary function is available for the keys (N, O or P), an icon appears at the bottom of
the display. To access the secondary function, press the appropriate key.

A long press with the key U starts the
turns off after 30 seconds.

Note – When the field software is running, the trigger key performs the same function as the
Measurement1 key (

M

) on the Face1 side and the Enter key (P) at the Face2 side.

Control Unit Face2 Backlight. Without any actions Backlight

Telescope Lens rain cover / sun shade

The Telescope Lens rain cover / sun shade protects the objective lens surface while measuring in
drizzle or lighter rain. The cover works in one Face only. The rubber material prevents damage to the
internal instrument system itself while unintentional moving between the two faces.

Fit the objective rain cover to the Face1 side of the instrument with the shield at the top of the
objective.

CAUTION – Dust and rain can have an effect on the distance measurements, please keep

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objective front lens and the targeting prism clean and use the objective rain cover.

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3 – Getting Started

Connecting the Instrument to an Office
Computer

Transferring Data Files

Microsoft ActiveSync® technology and Windows Mobile® Device Center (WMDC) provide an easy
way to synchronize data on a Windows-based computer with your FOCUS 35 Total Station.
ActiveSync works on computers that have Windows XP or earlier operating systems. WMDC works
only on computers that have the Windows Vista

ActiveSync and WMDC act as gateways between your device and your computer for transferring
data. You can also use the Explore feature in either program to move files or programs from your
computer to your device.

ActiveSync is already integrated into the operating system on the Spectra Precision FOCUS 35 Total
Station. However, you must install ActiveSync or WMDC depending on your computers operating
system. To download the current version:

• ActiveSync technology: https://www.microsoft.com/en-us/download/details.aspx?id=15

®

or Windows 7 operating system.

• Windows Mobile Device Center: https://www.microsoft.com/en-us/download/details.aspx?id=14

There are two types of ActiveSync connections. The table below summarizes the advantages and
disadvantages of each choice.

Advantages Disadvantages

Guest Fewer questions to answer on initial

connection.

Safer because synchronization cannot
adversely impact data either on the
instrument or the computer.

Partnership Fast subsequent connections (one

fewer step per connection).

The clock on the instrument is set to
match the computer clock.

Slower subsequent connections (one more step per
connection that requests Partnership).

You have to arrange these settings with every new
instrument connection.

More questions to answer on initial connection.

If the clock on the computer is wrong, it will
incorrectly set the clock on the instrument.

Partnership is deleted when the instrument is hard
reset.

FOCUS 35 TOTAL STATION USER GUIDE

33

3 – Getting Started

Setting Up and Running ActiveSync technology

Please use the Hirose-USB cable to connect the Spectra Precision FOCUS 35 Total Station with a USB
port of your computer. The instrument will switch on automatically.

Note – Microsoft ActiveSync tecnology or the Windows Mobile Device Center will start automatically,
depending on the operating system that is installed on your computer.

Do the following:

1. Program ActiveSync starts automatically, please follow the dialog.

2. If you select No, you are set up as a guest and the Select Synchronisation Settings dialog does not

appear. Go to step Step 4.

If you select

Ye s , Spectra Precision recommends that you clear all the check boxes in the next

dialog.

FOCUS 35 TOTAL STATION USER GUIDE

34

3. Click Next to continue.

4. Click Finish in the Setup Complete dialog.

ActiveSync opens.

3 – Getting Started

5. To view the files on the Instrument, click the Explore icon. The file structure looks and functions

the same as Windows Explorer on your computer.

FOCUS 35 TOTAL STATION USER GUIDE

35

3 – Getting Started

Disconnecting ActiveSync

CAUTION – To avoid disconnection problems, close ActiveSync before removing the cable.

C

Next remove the cable from the computer and then the cable from the instrument.

To disconnect ActiveSync:

1. Double-tap the connection icon in the task bar at the bottom of the screen, see image below for

location of icon.

Tip – You have to wait a few seconds until the next screen appears.

B

2. Tap Disconnect and then remove the cable:

For more information about ActiveSync, refer to the help or visit the Microsoft website.

Laser Information

For more information, see Laser Safety, page 3.

FOCUS 35 TOTAL STATION USER GUIDE

36

3 – Getting Started

❶

❷

Spectra Precision FOCUS 35 Total Station

The Spectra Precision FOCUS 35 distance measuring unit and Laser Pointer has been tested and
complies with the regulations for a CLASS 3R LASER PRODUCT.

Item Description

❶ Distance measurement LockNGo and Laser pointer aperture
❷ Tracklight aperture

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37

3 – Getting Started

Location of Laser warning label on a Spectra Precision FOCUS 35 Total Station

The laser warning label is located on the top of the distance measuring unit.

Distance Measurement Unit and Laser Pointer warning label:

FOCUS 35 TOTAL STATION USER GUIDE

38

Location of Laser aperture label on a Spectra Precision FOCUS 35
Tot al St ati on

The laser aperture label is located on one side of the telescope close to the objective.

3 – Getting Started

Laser aperture label:

FOCUS 35 TOTAL STATION USER GUIDE

39

CHAPTER

4

Setup 4

In this chapter:

 Setup

 Starting the Instrument

 Security

 Instrument Adjustment and Calibration

 LockNGo Tracker

 Measuring the Instrument Height

 Pre Measurement Check List

 Connecting to an External Data Collector

FOCUS 35 TOTAL STATION USER GUIDE

40

4 – Setup

Setup

An instrument setup with good measuring stability will increase the precision in the measurement
result and allow you to utilize the measurement precision of the Spectra Precision FOCUS 35
Total Station to its full extent.

Setup Stability

When an instrument is setup it is important to consider the following:

1. Set tripod legs wide apart to increase the stability of the setup. A setup where one leg is placed
on, for example, asphalt and the other two on soil will still be a stable setup provided that the
tripod legs are set wide enough apart. If it is not possible to set the tripod legs wide apart due to
obstacles, then the tripod can be lowered to increase stability.

2. Make sure that all the screws on the tripod and/or tribrach are tightened to avoid any play.

3. Any high quality tripod and tribrach can be used. However, Spectra Precision strongly
recommends the use of tripod heads made of steel, aluminium or similar material. Tripod heads
of fiberglass or other composite materials are not recommended.

See also StepDrive Motor System and Focus System, page 92 for more information.

Measurement Stability

Take into account that instruments require sufficient time to adjust to the ambient temperature. The
following rule-of-thumb for a high precision measurement applies: Temperature difference in degree
Celsius (°C) x 2 = duration in minutes required for the instrument to adjust to the new temperature.

Avoid sighting across fields with intense heat shimmer by sun light, e.g., at noon.

FOCUS 35 TOTAL STATION USER GUIDE

41

4 – Setup

Starting the Instrument

To start the instrument please press the on/off button about 1 second (one single beep) on right side
of the instrument. This will also start the Windows CE operating system.

This subchapter describes sequentially how different settings can be done in the field software in
Face1 Control Unit as well as in the Face2 Control Unit.

• The settings in the Face2 interface are accessible only without starting the field software. It is

recommended especially if you want to work in Robotic mode.

• When the Windows CE operating system starts, select your field software from the start menu.

Please refer to your Spectra Precision Survey field application documentation for supplementary
information.

FOCUS 35 TOTAL STATION USER GUIDE

42

Starting and Settings via Face1 Control Unit (if fitted)

Screen Actions and Comments

Face1 screen after instrument start While starting Windows CE the Spectra Precision logo

screen will show for several seconds and then the menu to
work in Windows CE will appear.

4 – Setup

Face1 screen after starting Windows CE Start the software Spectra Precision Survey Pro by tapping

the Survey Pro

Note – StepDrive motor system and Focus System are
already usable at this phase.

Note – If you are using the Spectra Precision Layout Pro
software, refer to that product’s User Guide for information
on using the FOCUS 35 total station.

Face1 screen while starting SP Survey Pro Instrument loads application software Spectra Precision

Survey Pro.

icon.

Electronic bubble for leveling process After starting the Spectra Precision Survey Pro™ software

the screen shows the Level menu. Level the instrument
with the help of the electronic bubble.

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43

4 – Setup

First Steps in Spectra Precision Survey Pro software

Spectra Precision recommends spending some time reading the Spectra Precision Survey Pro User
Guide to learn details of the application program.

This subchapter describes a brief overview.

Quick Shot Menu

After confirming the Level Bubble menu the screen shows the Quick Shot menu.

Screen Actions and Comments

Quick Shot menu In Quick Shot menu it is possible to measure without

storing data if no project is active.

Quick Shot menu with distance values Start the measurement either with L, M (F1), Q(F2)) or

z.

Note – Survey Pro cannot start without a job being open, so you have to open or create a new job
(file). In case you close the Quick Shot menu before you open or create a new job, Survey Pro will be
closed.

Note – If the laser pointer is in use it can be switched OFF in two different ways: 1.Switch OFF the
laser pointer and the instrument will still stay in reflectorless mode. 2.Change from reflectorless mode
into prism mode and the instrument will stay in prism mode.

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44

4 – Setup

Lookup and register Software

Screen Actions and Comments

Registration Modules menu After the initial start of Spectra Precision Survey Pro, the

following menu will appear. Please select Register
Modules and enter your registration code(s).

How to enter codes Please use the keyboard on the screen to enter registration

code.

Finalizing registration codes

Note – If you select Run In Demo Mode, all areas of the software are available, with the limitation a
job cannot exceed 25 points.

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45

4 – Setup

Open or create a Job

Screen Actions and Comments

Main Menu Spectra Precision Survey Pro Select menu File. The appropriate menu items appear on

the screen - e.g. Open /New.

Menu to work with jobs Select a file with Open or create a New Job with New.

FOCUS 35 TOTAL STATION USER GUIDE

46

Spectra Precision Survey Pro Version

Screen Actions and Comments

Main Menu File About

Select menu File and menu element About and the
software version appears on the screen.

Survey Pro Version

Press the ESC button and the program will return
automatically to the Main Menu.

4 – Setup

FOCUS 35 TOTAL STATION USER GUIDE

47

4 – Setup

Settings Face2 Display Backlight, Reticle Illumination and Tracklight

Screen Actions and Comments

Main Menu Spectra Precision Survey Pro Select instrument Settings by tapping on this icon.

Menu for Settings Navigate to Lights via drop down menu or toggle through

the submenus with

D key left or right.

Menu for Lights Settings Make selections and confirm the settings.

FOCUS 35 TOTAL STATION USER GUIDE

48

4 – Setup

Instrument Status

Waiting

Radio channel: 3
Network ID:

3

J $ =

Starting and Settings via Face2 Control Unit

Start Screen

Before following any of the instructions below, put the instrument in the Face2 position. Start the
instrument by pressing the trigger key for one single beep.

Screen Actions and Comments

Start screen Face2 Control Unit After starting the screen will display the Spectra

Precision logo and the firmware version. The
instrument checks for an available connection on the
set Radio Channel and Network ID for several
seconds and then goes to Waiting state.

Instrument Status Menu - Waiting 1. First function - Key description

– U - Change Face
– N - Scroll up
– O - Scroll down
– P - Enter

2. Second function - on screen symbols - short key
press
e.g.

– N - Leveling menu
– O - Status for battery and external power supply

status

– P - Instrument Settings

Note – StepDrive motor system and FOCUS System are usable while the Instrument Status menu
shows Waiting.

FOCUS 35 TOTAL STATION USER GUIDE

49

4 – Setup

Instrument Status

Waiting (suspend)

Radio channel: 3
Network ID:

$ *

3

Instrument Status

Waiting

Radio channel: 3
Network ID:

3

J $ =

Power Supply

Int.Bat. 6% low

>Ext. Bat. 12.4V ok

Screen Actions and Comments

Instrument Status Menu - Suspend After Starting: If the instrument is inactive for longer

than 5 minutes it will go into Suspend Mode, see also

Suspend Mode, page 24 and Power Management,
page 95. The display will show Waiting (suspend).

The instrument will leave the Suspend Mode by
starting the field software at the instrument, a short

P key press or a z key press (single beep).
* - Indicates Suspend Mode

Note – In Suspend Mode - menu shows Waiting (suspend) - instrument and telescope can be turned
by hand, whereas StepDrive motor system and Focus System are not usable

Status Power supply

Screen Actions and Comments

Instrument Status Menu - Waiting Symbol for battery (&) or external power (F)

supply.
Battery symbol with bars or x indicates battery

capacity:

– & - 75 to 100%
– $ - 50 to 75%
– ? - 25 to 50%
– ! - less then 25%

(below 10% ok will be changed to low)

– ( - no function possible

For more details and information about external
power supply select with a short O key press the
Power Supply Menu.

Power Supply - external source Menu shows the voltage of the source.

Leave the menu with P press.

FOCUS 35 TOTAL STATION USER GUIDE

50

Leveling

1000

-527

1317

Auto

Symbols

Telescope direction

Trunnion Axis direction

Bubble Scale value (Auto - max. 35 000; min. 500)

Instrument inclination > 100mgon

Instrument inclination < 100mgon

Second key functions

N Scale expansion (Manual mode - min. 100)
O Scale reduction (Manual)
P Back to Instrument Status menu

500

66

-72

Auto

Screen Actions and Comments

Leveling Menu Once you have selected the Level menu, the

electronic bubble appears in Face2 display.

Note – Values always in 0.1 mgon;
(0.3 mgon = 1”; 0.1 mgon = 1 cc)

Leveling Menu bubble adjustment

4 – Setup

Note – If there is field software at Control Unit Face1
started, this field software controls the Face2 display.
While using the field software in every menu the
Main Menu from the Face2 display can be opened
with a long P key press!

Security

To avoid unauthorized use of the instrument, you can activate a PIN / PUK security code.

PIN code

The PIN code is a four-digit code where each digit can be set to a number between 0–9, for example,

1234. If an incorrect PIN code is entered more than ten times, the instrument is locked and the PUK
code must be entered, see PUK code, page 52.

By default, the PIN code is set to 0000. With this code set, security is not activated and the user is not
prompted to enter the PIN code at start up.

The user can activate or change the PIN code (see following page).

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51

4 – Setup

Activating or changing the PIN code

1. On the Face 2 display, press N or O to scroll up or down until you see Set PIN and then press P.

2. Press N

3. After all digits have been set, press P to record the pin.

The menu returns to Set PIN.

or O to enter the PIN of your choice digit by digit—press P to accept each digit.

Using the PIN code to unlock the instrument

When the PIN code has been activated, you must enter it when you start up the Instrument. To do
this:

1. Switch on the FOCUS 35 instrument. The Face 2 display shows the menu Enter PIN.

2. Press N

3. Once all valid digits have been entered, press P. This unlocks the instrument—the Face 2 display

now shows the menu Instrument Status, the Radio Channel, and the Network ID.

If an incorrect PIN code is entered more than ten times, the instrument is locked and the PUK code
must be entered, see PUK code, page 52. When the correct PUK code is entered, the PIN code is
reset to 0000 and the security PIN code is deactivated.

or O to enter the PIN of your choice digit by digit—press P to accept each digit.

PUK code

The PUK (Personal Unlock Key) code is factory set on each instrument and cannot be changed by the
user.

If the PUK code has been lost, contact your authorized Spectra Precision distributor to retrieve it.

1. If an incorrect PIN code is entered more than ten times, the Error menu appears on the Face 2
display with the error message Invalid PIN and Instrument Locked and shows the softkeys PIN
and PUK.

2. Press PUK. The Enter PUK menu appears on the F2 display and shows PUK: 000000000000"

3. Press N

4. Once all valid digits have been entered, press P. The FOCUS 35 instrument is unlocked, the PIN
code is reset to 0000 and the security PIN code is deactivated.

If an incorrect PUK code is entered (any number of times), Error menu appears on the Face 2 display
with the softkeys Cancel and Retry. Select Retry to enter the PUK code again or select Cancel to
abort the procedure.

or O to enter the PUK code digit by digit—press P to accept each digit.

FOCUS 35 TOTAL STATION USER GUIDE

52

4 – Setup

HA: 290.1609
ZA: 200.4722
SD: 2.780 2.780

1

3

2

Instrument Status

Connected

Radio channel: 3
Network ID:

J $ =

3

Face2 Display while using Spectra Precision Survey Pro in different Instrument Versions

StepDrive and LockNGo versions:

If the field software at Control Unit Face1 is started, the field software controls the Face2 display.

Screen Actions and Comments

F2 Display while program Survey Pro The Face2 display always shows measurement results

parallel to the Face1 Control Unit.

1. SD value from the last measurement jumps to
left.

2. Symbol Prism or Reflectorless target

3. Symbol moves and shows the measurement
progress. Different symbols for status LockNGo.

Note – While using the field software in every menu
the Main Menu from the Face2 display can be
opened with a long P key press!

Robotic and RX versions:
If you are using an external controller (independent with radio or cable) with field software that has
been started, the controller with field software controls Face2 display.

Screen Actions and Comments

F2 Display while Robotic mode The Face2 Display in this configuration shows no

measurement results.

Note – While using the field software at the external
Control Unit the Level Menu or Main Menu from the
Face2 display can be opened.

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53

4 – Setup

F2 Brightness

Brightness:

9

F2 Contrast

Contrast:

150

Brightness and Contrast

Screen Actions and Comments

Brightness Menu Select with a long press of N key the setting menu

for Brightness.
Adjust the Brightness by pressing N or O.
Confirm the selection with P.
Brightness range: 0 - 20

Contrast Menu Select with a long press of N key the setting menu

for Contrast.
Adjust the contrast by pressing N or O.
Confirm the selection with P.
Contrast range: 0 - 256

Note – Setting function for brightness and contrast is available on every F2 menu.

FOCUS 35 TOTAL STATION USER GUIDE

54

4 – Setup

Instrument Status

Waiting

Radio channel: 3

Network ID:

3

J $ =

Main Menu

Radio Parameter
Level bubble
Instrument details

Exit

Main Menu Face2 - Information and Settings

With the Face2 display, you can access a number of functions and routines without starting the field
software at Control Unit Face1.

Screen Actions and Comments

Instrument Status Menu Select Main Menu by pressing P.

Main Menu Navigate with the N or O key in the Main Menu to

highlight the item you want to select.
Confirm a selection by pressing the P key.

The Main Menu is structured as follows

Content See page...

Exit

Radio Parameter page 56

Level bubble page 56

Instrument details page 57

Service menu page 58

FOCUS 35 TOTAL STATION USER GUIDE

55

4 – Setup

Main Menu

Radio Parameter

Level bubble
Instrument details

Exit

Radio Parameter

Radio channel: 21

Network ID: 100

Radio Parameter

In the Radio Parameter menu it is possible to set the radio channel and network ID number.

Screen Actions and Comments

Main Menu To set Radio Channel and Network ID, Press N and

O to scroll to Radio Parameter and press P.

Radio Parameter When entering this menu the cursor jumps to the

first digit of the Radio channel, first digit is active
(inverse) and with N or O the numbers 0-9 can be
selected.
Press P when number is correct - cursor jumps to
the next digit.
After you have selected the last digit for the Radio

channel the cursor jumps to the settings for Network
ID with the same procedure.

When last digit of Network ID is confirmed, the
system jumps back to the Main Menu.

Radio channel range: 1- 30
Network ID range: 0 - 255

Level Bubble

These details are already described in Leveling, page 51.

FOCUS 35 TOTAL STATION USER GUIDE

56

4 – Setup

Main Menu

Radio Parameter
Level Bubble

Instrument Details

Exit

Your definition

Serial: 87000002

FWVer: R 1.4.0

Instrument Details

FOCUS 35 Robotic 2“

Instrument Details

The Instrument Details menu displays the Instrument Version, Instrument name (your definition),
Serial number and Firmware version.

Screen Actions and Comments

Main Menu To read Instrument Details, press N or O to scroll to

Instrument Details and press P.

Instrument Details Leave the menu by pressing the P key.

FOCUS 35 TOTAL STATION USER GUIDE

57

4 – Setup

Service Menu

Main Menu

Radio Parameter
Level Bubble

Instrument Details

Service Menu

System diagnose

USB Interface

Service Menu

Exit

Ext. EDM Frequency

Service menu

The Service Menu is structured as follows

Setting See page...

Exit

USB Interface setting page 58

System diagnose page 59

External EDM Frequency page 60

External EDM calibration settings page 60

Drive Mode page 61

Radio configuration page 62

Next Service Date page 62

Note – The Service Menu is hidden—please contact your Spectra Precision Reseller for instructions on
how to access this option.

The Service Menu enables the following:

• USB interface settings

• Display and input of External EDM Calibration (scale and offset) for supplementary correction of

distance measuring units.

• Radio configuration (France only).

Screen Actions and Comments

Main Menu - Service Menu To select Service Menu, press N or O to scroll to

Service Menu and press P.

Service Menu -

USB Interface Settings To select USB Interface, press N and O to scroll to

USB Interface and press P.

FOCUS 35 TOTAL STATION USER GUIDE

58

4 – Setup

Exit

Always On

USB Interface

Temporary On

Always Off

System diagnose

USB Interface

Service Menu

Exit

Ext. EDM Frequency

Run system diag.

Service Menu

Exit

Show system state

Run system diag.

Check......

Please wait

Exit

Screen Actions and Comments

USB Interface

Tip – Please make sure that the default setting

B

USB Interface for Customer is Always Off.

Tip – If the FOCUS 35 total station needs a

B

firmware upgrade, the USB interface setting
must be set to Always On to complete the
firmware upgrade.

Service Menu - System diagnose Press N and O to scroll to System diagnose and

then press P.

Service Menu - Run system diag. Press N and O to scroll to Run system diag. and

then press P.

Tip – Show system state shows straightaway the

B

most recently obtained diagnose results

System diagnose The diagnose program checks all instrument

functions. During the diagnosis process, you may be
prompted to turn the instrument knobs and be
requested to aim to a prism. At the end the program
shows the results and offers the possibility to store it.

.

FOCUS 35 TOTAL STATION USER GUIDE

59

4 – Setup

Ext. EDM Frequency

System diagnose

Service Menu

USB Interface

Ext. EDM Calibration

Ext. EDM Frequency

Laser Class

3R

ESC

Ext. EDM Frequency

Laser Class

3R on!

f=400044548 Hz

Ext. EDM Calibration

Ext. EDM Frequency

Service Menu

System diagnose

Drive Mode

Screen Actions and Comments

Service Menu - External EDM Frequency Press N and O to scroll to Ext. EDM Frequency and

then press P.

EDM Frequency Press P to switch on the EDM Laser source with

modulated scale frequency.
Press N (ESC) to leave the menu.

EDM Frequency

Service Menu - Ext. EDM Calibration Settings after external EDM calibration:

C

WARNING – The unit in frequency calibration

mode produces visible Laser light emerging at
the centre of the telescope objective. The
Laser light conforms to Class 3R. Make sure to
do the external EDM frequency calibration
appropriate to all warnings and precautions at

Laser Safety, page 3.

Nominal frequency will be displayed.
Press P to leave the menu.

Press N or O to scroll to Ext.EDM Calibration and
press P.

C

WARNING – Both values for External EDM

Calibration influence the measured distance

directly! Therefore, they must have been
determined by means of an accurate external
calibration.

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60

4 – Setup

Ext. EDM Calibration

Scale 1.000000

Offset[mm] +00.0

Ext. EDM Calibration

Ext. EDM Frequency

Service Menu

Drive mode

Radio config

Normal

Drive mode

Exit

Fast

Screen Actions and Comments

External EDM Calibration When entering this menu the cursor stays always at

the P key. Press P when number is correct - the
system jumps back to the Service Menu.

To enter another value press N or O and the first
digit of the Scale is active (inverse) and with N and
O the numbers 0-9 can be selected. Press P when
number is correct - cursor jumps to the next digit.

After you have selected the last digit for the Scale
press P . The cursor jumps to the settings for Offset
with the same procedure.

When last digit of Offset is confirmed, the system
jumps back with the cursor to the inverse P symbol.

Press P key a further time - the system jumps to
Service Menu.

Service Menu - Drive Mode Settings for Drive Mode:

Drive Mode settings have an effect while using
LockNGo Tracker technology for robotic surveying or
while changing face.

Press N and O to scroll to Drive Mode and then
press P.

Drive Mode Press N and O to select Normal or Fast and then

press P.
Normal:
This mode is the default mode. Mode is suitable
for all instrument mounts.
Fast:
Mode can be a choice for instrument mount on

tripods.

FOCUS 35 TOTAL STATION USER GUIDE

61

Screen Actions and Comments

Ext. EDM Calibration

Service Menu

Drive mode

Radio config

Next Service Date

France

Radio config.

Exit

Global

Ext. EDM Calibration

Service Menu

Drive mode
Radio config

Next Service Date

Next Service date

Today:
Service: 01.12.2011

01.09.2011

Service Menu - Radio configuration Setting Radio configuration

Press N and O to scroll to Radio config. and then
press P.

4 – Setup

Radio configuration

Service Menu - Next Service Date Setting Next Service date

C

WARNING – Information to users in France

only! To comply with French radio regulations,
the radio must be set to French settings.

Press N and O to scroll to France and then press

P.

Press N and O to scroll to Next Service date and
then press P.

Next Service date Press P to leave the menu.

If the Service date is already expired the program
offers the possibility to postpone the Next Service
date (today plus three months). This change will be
logged internally.

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62

4 – Setup

Instrument Adjustment and Calibration

The section describes the instrument adjustments and calibration routines, adjustments for Laser
Pointer (see page 68), for Optical Plummet (see page 72), and for Tribrach Circular Level (see

page 73).

These adjustments and calibrations will change over time, the most common changes being caused
by:

• Wear and tear with use

• Bumps and knocks during transit

• Large changes in operating temperature

Spectra Precision recommends that a collimation and calibration check be carried out routinely as
follows:

• After any long uncontrolled transport of the instrument (e.g., after service or shipment to a new

location)

• After any accidental knock or drop

• At any time when the operating temperature changes by more than 10 °C (18 °F)

• At any time when the instrument changes it's height above sea level by more than 500 m

(1640 ft)

• At any time when the highest accuracy positions are required

• Routinely on a periodic basis (Monthly, weekly etc.)

Spectra Precision also recommends that the operator keep a record of the dates and values
measured so that any gross changes can easily be detected. Gross changes can indicate the need for
a check by an approved service center.

In all calibrations, multiple sightings will be made in both faces to ensure that any minor pointing
errors can be eliminated in the accurate determination of current collimation error values. All
measured collimation and calibration values are stored and used until a new set of values are
determined.

In a new instrument the values should be close to zero, over time these will change.

Compensator

Before starting the routine, level the instrument. An internal instrument battery must be present in
the side battery compartment. For instruments with Face 1 battery option, this battery compartment
must be empty. The instrument will automatically check if the compensator is within range before
the calibration is started.

The calibration process involves the instrument automatically reading the compensator value at a
series of predetermined positions through the full rotation of the instrument. The process takes
approximately one minute to complete. During the process the instrument should be on a stable
platform, free from vibration and untouched by the user.

FOCUS 35 TOTAL STATION USER GUIDE

63

4 – Setup

Optical (HA/VA) Collimation and Trunnion Axis Tilt

The Spectra Precision FOCUS 35 Total Station instrument utilizes precise angle and distance
measurements to determine the position of the point being measured. The instrument’s design
facilitates the ability to measure all points with a single pointing to the target in the Face1 position.
All electronic total stations are subject to collimation errors in both the horizontal and vertical angle
measuring systems, and also errors caused by the axis of the telescope not being truly perpendicular
to the vertical of the instrument.

In order to compensate for these errors, the collimation routine allows the operator to accurately
determine the current errors in the instrument, and store the errors as corrections to be applied to
all measurements made in a single pointing to a target. In this way the Spectra Precision FOCUS 35
Total Station will always provide accurate measurements.

The adjustment of the instrument for HA/VA collimation and Trunnion Axis tilt is a two stage process.

LockNGo Tracker

Only on Instruments with LockNGo capability:

The LockNGo Tracker unit is designed to be coaxial with the instrument cross hairs. If for any reason
the alignment of the tracker deviates from the line of the telescope cross hairs, then errors in
position of the point being measured would result. For this reason an LockNGo collimation check
needs to be carried out on a regular basis to ensure that any slight misalignment is corrected for.
Perform the test over a similar distance as that you will be working on, but at least 100 m (328 ft).

The prism target must be very still during the test (Spectra Precision recommends that you use a
tripod or bipod mount for the target) and must be in clear line of sight without any obstructing
traffic. The instrument is calibrated to accurately point at the center of the target in both horizontal
and vertical axes. The calibration is used to correct the positions of all points measured using the
LockNGo Tracker function.

Adjustment Routines in Survey Pro software (if available)

Start the application program Spectra Precision Survey Pro software. During the process the
instrument should be on a stable platform.

FOCUS 35 TOTAL STATION USER GUIDE

64

4 – Setup

Screen Actions and Comments

Main Menu Spectra Precision Survey Pro Select instrument Settings by tapping on this icon.

Settings Collimation Navigate to Collimation via drop down menu or

toggle through the submenus with D key left or right.
Select the appropriate adjustment.

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4 – Setup

Optical Collimation

The workflow is structured as follows:

Screen Actions and Comments

Collimation conditions Make sure to measure with the stated conditions.

Optical Collimation measurements Make the measurements per the displayed

information and confirm and store the values.

Optical Collimation / Trunnion Axis Decide per the displayed information for trunnion

axis tilt collimation or confirm and store the new
values for optical collimation.

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4 – Setup

Tracker Collimation and Compensator Collimation

Start screens are:

Screen Actions and Comments

Tracker Collimation start screen Make sure to measure with the stated conditions.

Compensator Collimation start scree Make the measurements per the displayed

information. During the process the instrument
should be free from vibration and untouched by the
user.

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4 – Setup

The Laser Pointer

The Spectra Precision FOCUS 35 Total Station uses a red laser beam to measure and as a Laser
Pointer. The Laser Pointer is coaxial with the line of sight of the telescope. If the instrument is well
adjusted, the red Laser Pointer coincides with the line of sight. External influences such as shock or
large temperature fluctuations can displace the red Laser Pointer relative to the line of sight.

Aligning the Laser Pointer

CAUTION – Viewing the laser spot on the adjustment target through the telescope is safe.

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WARNING – Do not try to make the adjustment using a prism, see Laser Safety, page 3.

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WARNING – Do not use the Laser Pointer as an aid when searching for prisms, see Laser

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Safety, page 3.

To avoid faulty measurements using the Laser Pointer, use the supplied adjustment target to check
the laser alignment regularly and before you attempt precise distance measurements:

1. Setup the adjustment target 10-15 meters (30-50 ft) away, facing the instrument.

2. Aim the instrument to the center of the target plate and then inspect the position of the red laser
spot in relation to the telescope cross-hairs.

3. If the red laser spot lies outside the cross-hairs, adjust the direction of the beam until it matches
the cross-hairs, see the Laser adjustment plate, below:

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Adjusting the Laser Beam

❶

❷

1. Pull out the two plugs from the adjustment ports of the telescope housing:

The image shows the Laser beam adjustment ports.

4 – Setup

Item Description

❶ Vertical pointer adjustment port
❷ Horizontal pointer adjustment port

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4 – Setup

Counter clockwise = up

Clockwise = down

2. To correct the vertical position of the laser spot, insert the allen key into the vertical adjustment
port and turn it as shown:

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3. To correct the horizontal position of the laser spot, insert the allen key into the horizontal

Counter clockwise = right

Clockwise = left

adjustment port and turn it as shown :

4 – Setup

4. Check the alignment of the laser spot and the cross-hairs. Throughout the adjustment procedure,

5. Refit the plugs in the adjustment holes. Make sure that the plugs are correctly fitted for proper

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keep the telescope pointing to the adjustment target. The adjusting screws are of a high tension
because they are self locking. The screws tighten automatically after you adjust them.

sealing against the cover.

CAUTION – To keep out moisture and dust, make sure that the plugs are correctly fitted in the
adjustment ports.

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4 – Setup

Optical Plummet

1. Set up the instrument and level it over a ground mark so that the tripod height is 1.5 m (±0.1 m)
(4.920 ft (±0.328 ft)), see image below.

2. Note the position of the inner circle of the optical plummet in relation to the ground mark.

3. Turn the instrument 200 grads (180 degrees).

4. Note the position of the inner circle of the optical plummet in relation to the ground mark. If the
inner circle of the optical plummet reticle moves in relation to the ground mark, you must adjust
the plummet reticle location.

5. Adjust out half of the error with the four adjustments screws on the optical plummet.

6. Turn the instrument 200 grads (180 degrees).

7. If there is no movement between the inner circle of the optical plummet reticle in relation to the
ground mark, no further adjustment is needed.

CAUTION – When adjusting the optical plummet with the four adjustment screws it is

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important that the screws are correctly adjusted. When one screw is adjusted the opposite
screw must be adjusted equally in the reverse direction, in order to keep the correct tension
on the optics. Do not overtighten the screws, this might damage the optics.

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Optical plummet adjustment:

❶

❷

4 – Setup

Item Description

❶ Optical plummet reticle 4x adjustment screws
❷ Ground mark

Tribrach Circular Level

1. Level the instrument with the electronic instrument bubble.

2. Remove the instrument from the tribrach.

3. Use the provided adjustment key and adjust the bubble with the three bubble screws. The
bubble must be centered.

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CAUTION – When adjusting the Circular Level with the three adjustment screws it is important

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that the screws are correctly adjusted. When one screw is adjusted the two opposite screw
must be adjusted equally in the reverse direction, in order to keep the correct tension on the
Circular level. Do not overtighten the screws.

Circular Level adjustment:

4 – Setup

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4 – Setup

❷

❶

Measuring the Instrument Height

There are two measurement marks on the side of the instrument. The top mark ❶ corresponds to
the trunnion axis of the instrument. The bottom mark
Measure the bottom mark to the top ridge of the mark.

Instrument height marks:

❷ is 0.158 m (0.518 ft) below the top mark.

When the Spectra Precision Survey Pro is running, the software has additional functions that reduce
the bottom mark measurement to the required vertical instrument height to the trunnion axis, see
image below and the following paragraph.

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Instrument height measurement

0.158m
(0.518ft)

Hm

Hc

Ih

4 – Setup

The measured distance (Hm) is corrected for the slope of the measurement to obtain a vertical
measurement to the bottom mark (Hc). The constant from the bottom mark to the top mark
(0.158 m/0.518 ft) is added to the Hc to obtain the vertical instrument height from the ground mark
to the trunnion axis (Ih). For more information, refer to the Spectra Precision Survey Pro
documentation.

Alternatively, to obtain an accurate measurement to the top mark (Ih), you can manually measure
the slope distance from the ground to the bottom mark (Hm). To calculate the total instrument
height (Ih), insert the measured slope distance (Hm) into the formula below:

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4 – Setup

Pre Measurement Check List

Before you begin measurement or stake out operations, check the following items:

• Lenses are clean

• Instrument is correctly leveled and Trunnion axis tilt

• HA/VA Collimation error

• LockNGo Tracker collimation error (if the instrument is equipped)

• Laser Pointer beam alignment

• Correct radio channel is selected (robotic measurements only)

• Measure instrument height

• Allow sufficient time for the instrument to adjust to the ambient temperature, see Setup Stability,

page 41

Connecting to an External Data Collector

Spectra Precision Ranger™, T41™, Nomad®, and Recon® data collectors can be used as data
collectors for the Spectra Precision FOCUS 35 Total Station.

The controller can be connected to the Spectra Precision FOCUS 35 Total Station via cable or via
radio.

Connecting with Cable - Instrument Version StepDrive and LockNGo

The controller is connected from the Spectra Precision FOCUS 35 Total Station COM port to the USB
or the RS232 connector.

Controller Cable

Recon 53002021-SPN

Nomad 53002021-SPN

T41 67601-05 53002021-SPN

Ranger 73840019-SPN

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4 – Setup

The image shows an External controller connected to the Spectra Precision FOCUS 35 Total Station
with cable for StepDrive and LockNGo measurements.

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4 – Setup

Ranger with radio (option) or Controller with separate radio

Connecting with Radio - Instrument Versions Robotic and RX

The data collector is connected directly to the instrument via the internal in radio. The image shows
an External Data Collector connected to the Spectra Precision FOCUS 35 Total Station using the radio
for robotic measurements.

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CHAPTER

5

Instrument Operation Methods 5

In this chapter:

 Introduction

 Conventional Measurements with StepDrive

Motor System

 LockNGo Measurement

 GeoLock Technology

 Robotic Measurement

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5 – Instrument Operation Methods

Introduction

This chapter describes the following instrument operational methods for the Spectra Precision
FOCUS 35 Total Station:

• Conventional measurement with StepDrive motor system

• LockNGo measurement

• GeoLock technology

• Robotic measurement

Conventional Measurements with StepDrive Motor System

This chapter describes the following instrument operational methods for the Spectra Precision
FOCUS 35 Total Station:

• When combined with the application software:

– When setting/staking out, the instrument calculates and automatically aims towards the

calculated position of the selected point.

– The instrument will automatically point towards a selected reference target to check for

instrument movement during measurements.

• Instrument software corrects the collimation / trunnion axis tilt errors in real time.

• The StepDrive motor system are continuous and endless allowing for rapid repeat manual

pointing of the instrument with no end stops.

Note – To obtain the correct point location with the instrument, you must aim correctly to the target.

LockNGo Measurement

Combining the StepDrive motor capability with the image based tracking system provides the ability
to carry out LockNGo measurements. LockNGo enables the instrument to automatically lock on to a
prism, and then follow it precisely as it moves. This means that the instrument is taking care of the
pointing, and that position can be continuously updated as the target moves around the jobsite.
LockNGo is especially useful for carrying out rapid site topo measurements and during stakeout using
a conventional two person crew. It is also exceptionally useful for working in poor visibility and
darkness conditions, and for automatically checking to reference targets during measurements.

GeoLock Technology

GeoLock™ technology is a feature of the Spectra Precision Survey Pro software that allows a robotic
total station to perform an aided search for an optical target using an initial GPS position. The
technology greatly reduces the time to locate and lock onto a target.

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5 – Instrument Operation Methods

The Spectra Precision GeoLock technique combines a GNSS position with the FOCUS 35 robotic total
station and the robotic roving operator. The remote instrument can then be directed towards the
robotic roving operator using the GNSS position and a subsequent search is quickly performed to
reacquire the target at the robotic rover.

Robotic Measurement

Combining the StepDrive motor capability with the image based tracking system and the radio
capability enables the instrument to carry out measurements robotically. This enables a single
operator to control the instrument and carry out measurements or set/stakeout from the rod at the
point.

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CHAPTER

6

Instrument Technology 6

In this chapter:

 Angle Measuring Technology

 Distance Measuring Technology

 Tracklight

 StepDrive Motor System and Focus System

 LockNGo Tracking Technology

 Power Management

 Power Supply

 External Communication

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6 – Instrument Technology

Angle Measuring Technology

The principles of angle measurement are based on reading an integrated signal over two opposite
areas of the graduated circle and producing a mean angular value. This eliminates inaccuracies
caused by eccentricity and graduation.

In addition, the angle measurement system compensates for the following automatic corrections:

• Instrument mislevelment (deviation of the plumb axis).

• Horizontal and vertical collimation error.

• Trunnion axis tilt, see Correction for Trunnion Axis, page 86.

Correction for Mislevelment

The Spectra Precision FOCUS 35 Total Station automatically corrects for mislevelments up to ±5.5’.
The instrument warns the operator immediately of any mislevelments in excess of ±5.5’(±0.1 grads).

Corrections for the horizontal angle, vertical angle, and slope distance are calculated in the field
application software and applied to all measurements.

Compensator Calibration

The calibration process involves the instrument automatically reading the compensator value at a
series of predetermined positions through the full rotation of the instrument. The process takes
approximately one minute to complete. During the process the instrument should be on a stable
platform, free from vibration and untouched by the user.

Spectra Precision recommends that you regularly carry out a compensator calibration, especially in
the following situations:

• Whenever the instrument may have been roughly handled during transport.

• When the ambient temperature differs by more than 10 °C (18 °F) from the previous calibration

test temperature.

• Immediately prior to high precision angle measurements in one face.

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6 – Instrument Technology

Correction for Collimation Errors

HA/VA Collimation

The horizontal collimation error is the deviation of the sighting axis from its required position at right
angles to trunnion axis.

The vertical collimation error is the difference between the vertical circle zero and the plumb axis of
the instrument.

Traditionally, collimation errors were eliminated by observing angles in both instrument faces. In the
Spectra Precision FOCUS 35 Total Station, a pre-measurement collimation test is performed to
determine the collimation errors. Angular measurements are observed in both instrument faces, the
collimation errors are calculated, and the respective correction values are stored in the instrument.
The collimation correction values are then applied to all subsequent angle measurements, including
the distance related focus lens collimation error. Angles observed in a single face are corrected for
collimation errors, which eliminates the need to measure in both instrument faces.

Carry out a collimation test in the following situations:

• Whenever the instrument may have been roughly handled during transport.

• When the ambient temperature differs by more than 10°C (18°F) from the previous collimation

test temperature.

• Immediately prior to high precision angle measurements in one face.

Spectra Precision FOCUS 35 Total Station with LockNGo Tracker

A Spectra Precision FOCUS 35 Total Station with LockNGo capability can automatically lock and track
a prism target as it moves. Pointing errors caused by slight misalignment of the instrument’s tracker
have a similar effect to the HA and VA Collimation errors as detailed above.

To correct for the tracker collimation errors, carry out a LockNGo Tracker collimation test. The
LockNGo Tracker collimation test automatically observes angular measurements to a target in both
faces, the tracker collimation errors are calculated and the respective correction values are stored in
the instrument.

The collimation correction values are then applied to all subsequent angle measurements observed
when LockNGo Tracker is enabled. Angles observed in a single face are corrected for collimation
errors, which removes the need to measure in both instrument faces.

Carry out a LockNGo Tracker collimation test in the following situations:

• Whenever the instrument may have been roughly handled during transport.

• When the ambient temperature differs by more than 10°C (18°F) from the previous collimation

test temperature.

• Immediately prior to high precision angle measurements in one face.

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6 – Instrument Technology

Trunnion axis
tilt error

Correction for Trunnion Axis

The trunnion axis tilt error is the deviation of the trunnion axis of the telescope from its required
position at right angles to the plumb axis of the instrument.

In the Spectra Precision FOCUS 35 Total Station, perform a pre-measurement trunnion axis tilt test to
determine the trunnion axis tilt error. Angular measurements are observed in both instrument faces,
the trunnion axis tilt error is calculated, and the respective correction value is stored in the
instrument. The trunnion axis tilt correction value is then applied as a correction to the horizontal
angle value.

Carry out a trunnion axis tilt test in the following situations:

• Whenever the instrument may have been roughly handled during transport.

• When the ambient temperature differs by more than 10°C (18°F) from the previous collimation

test.

• Immediately prior to high precision angle measurements in one face.

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6 – Instrument Technology

Averaging Measurements to Reduce Sighting Errors

The Spectra Precision FOCUS 35 Total Station automatically reduces sighting errors caused by the
misalignment of the instrument to the target or by pole movement during measurement.

The following techniques can be used:

• Use LockNGo Tracker. When LockNGo Tracker is enabled, the instrument automatically locks onto

and tracks the target. Manual sighting errors are reduced.

• Automatically average angles during distance measurement. When measuring in Standard mode,

the instrument takes angle measurements while measuring the distance. Angles returned to the
instrument at 200 Hz, are averaged over this period to obtain an averaged angle measurement.

• Use average measurement methods in the field software.

Distance Measuring Technology

Spectra Precision FOCUS 35 Total Stations are equipped with a combined distance unit. This means
that the instrument can measure to a prism or to normal surfaces (reflectorless mode).

The laser distance unit is based on the phase comparison method. The distance unit is coaxial with
the line of sight and transmits an intensity modulated optical measuring beam that is reflected by a
prism or scattered by a natural surface on which the beam is directed. The phase difference between
the transmitted light and the reflected received light is detected and represents the distance.

In prism mode, the unit operates as a fast and precise long-range distance meter. In reflectorless
mode, the unit transmits a collimated visible red laser beam to the target point and then calculates
the distance between the transmitted and the received light.

The distance unit software will detect erroneous single distance measurements such as those caused
by an obstruction passing through the measurement beam, and will ignore such readings in the
computation of the final distance.

The unambiguous range for distance measurement is as follows:

• Prism mode - 7,350 m (24,114 ft)

• Reflectorless mode - 1,100 m (3,609 ft)

Note – Do not measure to a prism in reflectorless mode. Distances up to 1100 m (3,609 ft) are not
allowed because a Class 3 Laser is used for reflectorless distance measurement. For distances longer
than 1100m (3,609 ft), the instrument's distance accuracy is not guaranteed.

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6 – Instrument Technology

Beam Divergence

All distance meter measurement beams diverge as the range from the instrument increases. The
divergence of the distance meter beam relates to an increase in the size of the area being sampled,
not to a degradation of the measurement precision.

A larger measuring area at longer range is generally better because it enables smaller objects, such
as power lines and antennas, to be detected and accurately measured. With a smaller measuring
area, these small objects can be easily missed. A smaller measuring area has advantages when
measuring tight corners and vertices at close range. When observing measurements to a tight corner,
the distance meter beam divergence introduces a range error caused by the size of the sampling
area.

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6 – Instrument Technology

Required
distance

Required
distance

Measured
distance

Measured
distance

Measuring to an inner and outer corner:

Although the problem is reduced with a beam that uses a smaller measuring area, the error can not
be completely eliminated. The most accurate solution to measure to tight corners and eliminate
errors caused by beam divergence, is to use an offset measurement method such as that used in the
field application software.

Do the following:

1. Measure two points on the face of the building.

2. Aim the instrument at the corner to store the correct horizontal and vertical angle.

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Offset measurement:

Point 1

Point 2

Point 3

6 – Instrument Technology

With offset measurements, you can accurately measure difficult locations in reflectorless mode and
eliminate beam divergence errors. For more information, refer to the field application software
documentation.

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6 – Instrument Technology

Green light Red light

Tracklight

Tracklight is a visible guide light that enables the rod holder to position themselves into the
instruments current line of sight. The tracklight can be used during stakeout in all operational modes,
and is also of great benefit when operating in robotic mode as a means of checking that the
instrument is tracking, or when trying to reacquire lock by walking into the sight line of the LockNGo
Tracker, or using the remote joystick control in robotic mode. Tracklight consists of a flashing two­colored light, with each color lying in its own lateral projection sector. If the rod holder is to the left
of the measuring beam, they will see a red flashing light; if they are to the right, they will see a green
flashing light.

Tip – You can use the tracklight for clearing sight lines and as an aid to find prisms in the dark

B

or unfavorable sighting conditions.

WARNING – Do not use the Laser Pointer as an aid when searching for prisms, the reflected

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light can dazzle your eyes. The reflected light will not damage your eyes, but might be
uncomfortable, see also Laser Safety, page 3.

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6 – Instrument Technology

Stable setup Unstable setup

StepDrive Motor System and Focus System

Spectra Precision FOCUS 35 Total Station is equipped with a StepDrive motor system to position the
instrument and the telescope and a servo drive to focus the telescope.

Due to the instrument accuracy it is important to use a high quality tripod and tribrach. It is also
important to set up the tripod in a position for best stability, as shown. An unstable setup that could
negatively influence the resulting measurement precision.

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6 – Instrument Technology

UP

Down

Left

Right

❶

❷

StepDrive

The StepDrive motor system is a mechanical rough-fine drive system, which gives high turning
speeds and accuracy. The system provides endless horizontal and vertical motion, including endless
fine adjustment. The instrument uses a StepDrive motor system when performing a number of
different operations such as turning the horizontal and vertical motion knobs, for automatic test and
calibration, or when using LockNGo Tracker technology for robotic surveying, see image below.
Please see also Settings for Drive Mode:, page 61.

Position StepDrive motion knobs:

Item Description

❶ Vertical motion knob
❷ Horizontal motion knob

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6 – Instrument Technology

Focus motion knob

Focus System

The instrument is equipped with a motor focus drive. The focus motion knob is on the side of the
instrument for easy access.

The focus knob is connected to a servo motor that is built into the telescope. When you turn the
focus motion knob, the servo motor adjusts the focusing lens.

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6 – Instrument Technology

LockNGo Tracking Technology

The Spectra Precision FOCUS 35 Total Station is equipped with an image based tracking system,
which is used for robotic or conventional measurements to lock onto and track a prism.

LockNGo tracking technology controls the instrument StepDrive motor systems and aims the
instrument correctly towards the target.

Tip – To assure maximum performance from the LockNGo tracking technology keep the lens

B

clean and dry.

The Spectra Precision FOCUS 35 Total Station LockNGo tracking function:

The Spectra Precision FOCUS 35 Total Station can lock onto and track a prism.

Power Management

The power management in the Spectra Precision FOCUS 35 Total Station instrument can set the
instrument to one of three different modes.

• Off Mode

• On Mode - all instrument functions

• Suspend Mode - to save power and replace empty battery

Note – Saving power is also the possible with an economical use of the Control Unit Face1 Backlight,
for settings see Display Backlight Face1 Control Unit, page 31.

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6 – Instrument Technology

Instrument

Off Mode

• Press the Trigger key for 1 second (single beep) to turn on the instrument.

Note – During Off Mode the Trigger key LED is off.

On Mode

• When starting the instrument it will enter a Waiting mode, where it will wait for an external

connection for about 5 minutes. While in waiting mode the Trigger key LED will flash once every
second and Face2 Display will show “Waiting”. During this time it is possible to start the
application program, or prepare the settings for robotic measurements. The StepDrive motor
system and Focus System are usable during this time.

• If the instrument is not used for 5 minutes (default) the instrument will go to Suspend Mode and

Face2 display will show “Waiting (suspend)”.

• To turn Off the instrument press the Trigger key for 3 seconds - one beep and one double beep.

• The instrument will automatically enter Suspend Mode when the battery (including he Face 1

battery, if available) is removed.

• The instrument will go to Suspend Mode if the battery is low (battery capacity less than 5%),

which enables you to replace the battery within a period of 10 to 15 minutes.

• Without replacing the battery the instrument will go to Off Mode if the battery capacity is less

than 2 % and any unsaved data will be lost.

Note – During On Mode the Trigger key LED will be on solid.

Suspend Mode

• You can resume working from the same place in the software that you were before you entered

Suspend Mode.

• You can replace a discharged battery with a charged one within a period of 30 seconds.

• In the suspend mode the Radio and the Face2 display will be enabled. Face2 display will show

“Waiting (suspend)”

• To turn the instrument On, press the Trigger key for one second (one beep) or connect to the

instrument from a remote application.

• To turn the instrument Off, press the Trigger key for 3 seconds.

• In Suspend Mode the instrument will turn Off automatically at suspend time out (default

120 minutes).

Note – During Suspend Mode the Trigger key LED will flash once every five seconds.

Robotic configuration

A separate control unit is via cable or radio connected with the instrument. For starting the
instrument see Instrument, page 96.

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6 – Instrument Technology

On Mode

• If the instrument is controlled by a separate controller the instrument will not go into Suspend

Mode while the battery is charged.

• For setting the instrument to suspend mode shut down the radio or cable connection between

instrument and separate control unit, and the instrument will enter suspend mode. The
instrument will turn Off automatically at suspend time out (default 120 minutes).

• The instrument will go to Suspend Mode if the instrument battery is low (battery capacity less

than 5 %), which enables you to replace the instrument battery within a period of 10 - 15 minutes
with detailed information and warnings.

• Without replacing the battery the instrument will go to Off Mode if the battery capacity is less

than 2%.

Power Supply

The power management in the Spectra Precision FOCUS 35 Total Station has been designed to
deliver the most operating time in the field. The power management system includes the internal
battery, optional external power supply and the battery charger.

Internal Power Supply

The primary power supply for the Spectra Precision FOCUS 35 Total Station is a rechargeable,
removable Lithium-ion battery.

Second Internal Power Supply

On available models, a second internal battery can be inserted in the Face 1 battery compartment.
This battery is treated as an external power source and power is used from this battery before the
main internal battery is used.

External Power Supply

The Spectra Precision FOCUS 35 Total Station has one external port in the base of the instrument for
communication and for external power supply. External power can be provided by a car battery with
an appropriate cable.

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6 – Instrument Technology

External Communication

The communication port on the base of the Spectra Precision FOCUS 35 Total Station can be used for
external communications to a computer or data collector.

CAUTION – Use only the gray cables with 6-pin Hirose connectors from Spectra Precision when

C

connecting a cable to the instrument.

Radio

The Spectra Precision FOCUS 35 Total Station (Robotic and RX versions) has an internal radio to
support robotic operations. The internal radio is a 100 mW radio that operates in the public free

2.4 GHz band. The radio uses frequency hopping technology to reduce radio interference and

maintain radio communications in even the harshest RF environment. The Spectra Precision
FOCUS 35 Total Station radio baud rate is 115200 bps. This high baud rate reduces the measurement
latency, which ensures that a measurement viewed at the pole is received 100 msec after the
measurement is sent from the instrument. To maintain radio communication with the instrument,
the controller at the pole must also be connected to a 2.4 GHz external radio or have an internal
radio (Spectra Precision Ranger).

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CHAPTER

7

Accessories and Options 7

In this chapter:

 Rod and Prisms

 Robotic Components

 Cables for External Power Supply and Data

Transfe r

 Control Unit Screen Protector

 Telescope Accessories

 Transport Case Accessories

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7 – Accessories and Options

Rod and Prisms

Spectra Precision Standard Rod

The Spectra Precision standard rod is available with the Spectra Precision FOCUS 35 Total Station.
The rod contains the following features:

• Graduated scale in Meter and Feet

• Fixed target height position

• Leveling bubble

Spectra Precision 360 Degree Prism

This is a 360° prism comprising 7x25 mm prisms, h:135 mm, prism constant 2 mm. While using this
prism adapter the height can be directly determined at the Spectra Precision standard rod.

Note – The FOCUS 35 total station is a passive tracking device that allows users to measure and track
a variety of prisms. Necessary prism constants and quality checks are recommended to maintain
high-accuracy measurement results.

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