Key features andbenefits

Rugged, tough, anddurable

Ease of operation

Coaxial slow motion andclamps

25 hour power supply

Digital display withselection of different units

Error elimination

Automated measurementroutines

ETh 50 Routine TheodoliteEasy-to-use, robust, precise, and fast routine theodolitebuilt for the building site

Surveying instruments need to bereliable and fast, and they shouldalso be easy to operatejust like theETh 50 routine theodolite from theZeiss Elta line of Trimblesurveying systems. Key featuresinclude: Coaxial slow motion drive and

clamp for rapid pointing. Easy-to-use menu driven

operationtraditional manualsettings made on opticaltheodolites are replaced with asimple button press or menufunction.

All measurement data can beviewed on the 4 line display,rapidly providing you with theresults that you need.

Electronics eliminate the errorsassociated with traditionaltheodolites. Because themeasurements are automated, time-consuming tasks such as readingthe circles and reducing the dataare eliminated.

The tubular level (plate bubble) isintegrated into the instrument,making it easy to level theinstrument.

From classical angle measurement,setting out right angles and checkingplumb, right through to alignmentmeasurementsthe ETh 50 can doit all.The ETh 50 provides a high qualityall round theodolite for routinemeasurements in and around theconstruction site.

Angle measurementthe easy wayElectronic scanning of the horizontaland vertical circles, with continuousdigital display of results,considerably speeds up themeasurement process, and eliminatesreading and estimation errors.

Angle control at the press of abuttonThe ETh 50 provides automaticcontrol over standard theodolitefunctions: Clockwise and counter-clockwise

angle measurement. Zero setting of the horizontal

angle in any direction.

Setting the horizontal circle to apredefined bearing.

Conversion of the vertical angle topercentage grade.

Definition of the zero direction ofthe vertical angle system, coveringa variety of conventions andapplications including: zenithangle, vertical angle, elevationangle, and % slope.

All measurement units supportedThe ETh 50 displays data in allinternational measurement units,and it allows you to select theresolution: Measurement system units: 360

DMS, 360 Decimal, 400Grads/Gon, 6400 mils.

Display resolution: from 1"(0.3mgon), 5" (1.5mgon), to 10"(3 mgon).

Operating convenienceThe ETh 50 has a clear keyboardlayout with just seven keys for thecontrol of all measuring functions.

The clearly arranged four-linedisplay is 24 characters wide and itprovides simultaneous display of allmeasurement results, as well as theoptions provided by the functionkeys.The display and reticle areilluminated, providing easyoperation in poor conditions ordarkness.A minimum sighting distance ofonly 0.80m (2.62ft) ensures reliableresults even in confined spaces.

Measuring accuracy and reliablilityThe ETh 50 provides automaticcorrection for errors associated withtraditional theodolites, deliveringaccurate results with fewerobservations. Errors eliminatedinclude: Sighting axis error, Index error, and Collimation error

For classical angle measurements, setting out right angles, plumbing and alignment measurements.

2

001,

Trim

ble

Nav

igat

ion

Lim

ited.

All

right

s re

serv

ed. T

he G

lobe

& T

riang

le lo

go a

nd T

rimbl

e ar

e tra

dem

arks

of T

rimbl

e N

avig

atio

n Li

mite

d. Z

eiss

Elta

is a

trad

emar

k of

Trim

ble

Nav

igat

ion

Lim

ited

regi

ster

ed in

the

Unite

d St

ates

Pat

ent a

nd T

rade

mar

k Of

fice.

All o

ther

trad

emar

ks a

re th

e pr

oper

ty o

f the

ir re

spec

tive

owne

rs. T

ID12

419

(09/

01)

Trimble Navigation Limited5475 Kellenburger RoadDayton, Ohio 45424-1099U.S.A.+1-937-233-8921 phone+1-937-233-9441 Faxwww.trimble.com

Trimble Navigation EuropeTrimble GmbH

Am Prime Parc 11D-65479 RaunheimGERMANY+49-6142-2100-0+49-6142-2100-220 Fax

Trimble NavigationAustralia PTY Limited

Level 1/123 Gotha StreetFortitude Valley, QLD 4006AUSTRALIA+61-7-3216-0044+61-7-3216-0088 Fax

YOUR LOCAL TRIMBLE OFFICE OR REPRESENTATIVE

Accuracy (DIN 18723)Horizontal angle measurement 6"/2.0 mgonVertical angle measurement 6"/2.0 mgon

Angle measurement

Hz and V circles absoluteMeasuring units 360 (DMS)

360 decimal400 grad/gon6400 mils