Leica Geosystems 352036 User manual

User Manual

English
Version 2.0

Leica NA2/NAK2

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Automatic level

Congratulations on your purchase of a NA2/NAK2 automatic
level.

This manual contains important safety directions as well as
instructions for setting up the product and operating it. Refer to
"Safety Directions" for further information.
Read carefully through the User Manual before setting up the
product.

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Automatic level

Product identification

The model and the serial number of your product are indicated on
the housing.
Enter the model and serial number in your manual and always refer
to this information when you need to contact your agency or Leica
Geosystems authorized service workshop.

Type: Serial no.:

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Product identification

Symbols

The symbols used in this manual have the following meanings:

DANGER:

Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.

WARNING:

Indicates a potentially hazardous situation or an unintended
use which, if not avoided, could result in death or serious
injury.

CAUTION:

Indicates a potentially hazardous situation or an unintended
use which, if not avoided, may result in minor or moderate
injury and/or appreciable material, financial and environ­mental damage.

Important paragraphs which must be adhered to in practice
as they enable the product to be used in a technically
correct and efficient manner.

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Symbols used in this manual

View of chapters

Introduction ......................................................................... 7

Measurement preparation ...............................................10

Measuring .......................................................................... 14

Checking and adjusting ................................................... 20

Care and Storage .............................................................. 22

Safety Directions .............................................................. 25

Accessories....................................................................... 32

Technical Data .................................................................. 34

Index................................................................................... 35

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View of chapters

Contents

Introduction ................................................ 7

Special features .......................................... 7

Important parts ........................................... 8

Technical terms and abbreviations ............ 9

Measurement preparation ......................10

Case contents ........................................... 10

Setting up the tripod .................................. 11

Levelling up ............................................... 12

Focusing telescope .................................. 13

Centring .................................................... 13

Measuring ................................................. 14

Height reading .......................................... 14

Distance measuring .................................. 15

Angle measuring ....................................... 15

Line levelling ............................................. 16

Area levelling ............................................ 17

Levelling total station measuring ............. 18

Levelled stakeout ...................................... 18

Precise levelling ........................................ 19

Checking and adjusting .......................... 20

Tripod ........................................................ 20

Circular level ............................................. 20

NA2/NAK2-2.0.0en

Checking and adjusting of the

line-of-sight ............................................... 21

Care and Storage ..................................... 22

Transport................................................... 22

In the field ................................................ 22

Inside vehicle ........................................... 23

Shipping ................................................... 23

Storage ..................................................... 23

Cleaning .................................................... 24

Safety Directions ..................................... 25

Intended use of instrument ....................... 25

Permitted uses ......................................... 25

Adverse uses ........................................... 25

Limits of use ............................................. 26

Responsibilities ......................................... 27

Hazards of use ......................................... 28

Accessories .............................................. 32

Technical Data .........................................34

Index.......................................................... 35

6

Contents

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Introduction

Special features

The NA2/NAK2 universal
automatic level meets all
precision, convenience and
reliability requirements.
It‘s innovative technology will
make daily surveying jobs
easier.

The instrument is ideally suited
for all levelling applications and
at all orders of accuracy.

The instantaneous check facility
with the push-button control
promotes confidence.

NA2/NAK2-2.0.0en

• Easy operation, quick to
learn!

• Robust and reliable.

• High setting accuracy.

• Endless drive.

• Telescope with excellently­corrected optics for bright,
high-contrast images.

• Enables angle measurements
with internal glass circle
(NAK2 model).

• Optional parallel-plate
micrometer for precise fine
levelling.

NA-01

7

Introduction

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Important parts

21

3 7

8 10

4 5

912

6

11

13

1 Eyepiece of scale

microscope (NAK2 only)

2 Telescope eyepiece

3 Bayonet ring, locks

eyepiece in place

4 Open sight

5 Prism for viewing circular

level

6 Rapid/fine focussing knob

7 Objective housing

8 Push-button for compen-

sator control

9 Footscrew

10 Milled rim, for Hz-circle

setting (NAK2 only)

11 Circular level

12 Base plate

13 Endless horizontal drive

NA-02

(both sides)

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Introduction

Technical terms and abbreviations

Vertical
axis tilt

Plumb line

Plumb line

By centring the circular level the
instrument is almost level.
A small instrument tilt remains
(the vertical axis tilt).

NA2/NAK2-2.0.0en

Line-of-sight

NA-05

Compensator

The compensator in the
instrument is responsible for
compensating the vertical axis
tilt enabling an exactly horizontal
aiming.
The push button gives the
pendulum a slight tap to check the
functioning of the compensator.

Plumb line

9

NA-04

R

A

NA--06

Backsight/Foresight/
Intermediate sight

For determining the height

difference (∆H) between the

ground points A and B the back
sight (R) is measured first
followed by the forward sight
(V). Additional points relating to
A are measured as intermediate
sight (S).

V/S

Introduction

B

(∆H)

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Measurement preparation

Case contents

Remove NA2/NAK2 level from the case and check that all
components are present.

k

o
k
l

öm
m

o
k
l

d
m
l

o
k

g

d

n

o

j

u

k

is

d

e

k

w

n
a
s

h
c

0

u

0

a
r

7

b

A

e

N

G

1 Level

2 User Manual

3 Allen key/Adjusting pins

4 Protective cover & sun

2

shade

1

4

3

NA-35

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Measurement preparation

Setting up the tripod

1.

1.

1.

2.

NA-07

1. Loosen screws of tripod legs,
pull out to required length and
tighten screws.

2. In order to guarantee a firm
foothold sufficiently press the
tripod legs into the ground.

When pressing the legs into
the ground note that the force
must be applied along the
legs.

NA2/NAK2-2.0.0en

2.

2.

NA-09

NA-08

When setting up the
tripod pay attention to a
horizontal position of the
tripod plate.

Large inclinations of the tripod
must be corrected with the
footscrews of the tribrach.

11

NA-10

Careful handling of tripod

• Check all screws and bolts
for correct fit.

• During transport always use
the cover supplied.

Scratches and other
damages can result in poor
fit and measuring
inaccuracies.

• Use the tripod only for
surveying jobs.

NA-11

Measurement preparation

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Levelling up

1. Place level onto tripod head.
Tighten central fixing screw of
tripod.

2. Turn footscrews of tribrach
into centre position.

3. Centre circular level by
turning the foot screws.

NA2/NAK2-2.0.0en

A

NA-12

Centring the circular level

1. Turn foot screws A and B
simultaneously in opposite
directions until bubble is in
the centre (on the imaginary
"T").

12

B

NA-13

2. Turn foot screw C until bubble
is centred.

Measurement preparation

C

NA-14

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Focusing telescope

Centring

27

26

25

1. Aim telescope against a
bright background (e.g. white
paper).

2. Turn eyepiece until reticule is
sharp-focused and black.
Now the eyepiece is adjusted
to your eye.

NA2/NAK2-2.0.0en

NA-15

3. Aim telescope on staff using
the coarse aiming device.

4. Turn focusing knob until
image of staff is sharply
focused. If the eye is moved
up and down behind the
eyepiece the image of the
staff and the reticule should
not move relative to each
other.

13

NA-16

For centring over a ground
point:

1. Attach plumb bob.

2. Loosen central fixing screw
slightly and shift instrument
parallel on tripod until the
plummet is exactly over the
point.

3. Tighten central fixing screw.

Measurement preparation

NA-17

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Measuring

Height reading

Before starting field work

or after longer periods of
storage/transport of your
equipment check the field
adjustment parameters specified
in this User Manual.

Reduce possible

vibrations by holding the
tripod legs.

If the optical parts of your

instrument are dirty of
fogged, your measurements can
be affected. Keep clean all optical
parts of your instrument and
follow the cleaning instructions
specified in the User Manual.

Before starting work, let

the instrument adjust to
the ambient temperature
(approximately 2 minutes per ºC
of temperature difference).

NA2/NAK2-2.0.0en

NA-18

1

H

0

1. Setup instrument, level and
sharp-focus the reticule.

2. Setup level staff vertically
(refer also to Instruction
Manual of staff).

3. Roughly aim on staff using
the coarse aiming device.

4. Sharp-focus using the
focusing knob.

14

d

12

11

H

10

5. Fine-aim on staff using the
endless drives.

6. Check if circular level is
centred (view level prism).

7. Press the button to verify that
the compensator is functio­ning.

8. Read off height H at the
horizontal reticule hair.
Example above: H=1.143

NA-25

Measuring

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Distance measuring

Angle measuring

12

11

10

Carry out steps 1 to 8 according
to height reading.

Reading:

Upper distance line: 1.216 m
Lower distance line: 1.068 m

Difference L: 0.148 m
Distance d: 14.8 m

Result:

Distance d = 100 x L

NA2/NAK2-2.0.0en

L

316

315

314

313

NA-23

Circle reading 314°42’

The NAK2 is equipped with a
horizontal circle. The graduation
is 1° or 1 gon.
To measure an angle bring the
vertical hair of the reticule to the
centre of the staff.
By turning the milled ring, the
circle can be set to “0” or any
desired reading.

312

15

394

393

392

391

NA-26

Circle reading 392.66°

The circle is viewed through the
scale microscope and sharply
focussed by turning the
microscope eyepiece.
The Hz-angle is read from the
graduation line which protrudes
into the scale. Each scale line
represents 10’. The minutes are
read from the top scale line to
the circle graduation line.

390

Measuring

NA-27

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Line levelling

Point

No.

Back-

sight R

Fore-

sight V

Height

A +2.502 650.100

2 +0.911 -1.803

3 +3.103 -1.930

B -0.981 651.902

Sum +6.516 -4.714

∆H=

+1.802

RV
d

1

I

A

6. Carry out a foresight at
changepoint 3.

NA-28

7. Continue in the same way

d

1

RV

2

2

I

2

RV

I

3

3

B

∆H

until height at point B is
measured.

Result:

∆∆

∆H = sum backsight - sum

∆∆

foresight

Project:

Height difference (∆H) between

point A and B.

Select instrument station

and staff location by
pacing off such that approx. the
same target distances result (d1

≈ d2; approx. 40 to 50m).

Procedure:

1. Setup instrument at I1.

NA2/NAK2-2.0.0en

2. Setup level staff vertically at
point A.

3. Aim at staff and read off and
take down height (backsight
R).

4. Setup level at the
changepoint 2, aim at staff
and read off and take down
height (foresight V).

5. Setup level at I2, aim at staff
at the changepoint 2 and
read backsight and take
down.

16

Example of the booking:

Measuring

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Area levelling

Point

No.

Int erm.

sight

Height

A 592.00

R1 +2.20

⊗

594.20

S1 -1.80 592.40

S2 -1.90 592.30

S3 -2.50 591.70

S4 -2.30 591.90

A

R

S4

4

Project:

Height difference of several
reference points.

The required accuracy is

usually not very high
with such measurements.
Nevertheless, from time to time
read the staff on a stable
intermediate point (reading must
remain the same).

NA2/NAK2-2.0.0en

S1

1

S2

2

S3

3

Procedure:

1. Set up instrument centrally
between the desired points.
The instrument telescope
may not be below the highest
measured intermediate point.

2. Set up staff vertically at
reference point A.

3. Aim at staff and read and

NA-29

take down height (=backsight
to known point).

4. Set up staff vertically at
point 1.

5. Aim at staff and read and
take down height
(=measuring intermediate
point, intermediate sight)

6. Repeat steps 4 and 5 for
additional intermediate
points.

17

7. The height of individual points
are:

Height =

Height of station point

+ backsight (A)

- intermediate sight

Example of booking:

⊗ =Instrument horizon

Measuring

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Levelling total station measuring

R

Backsight to known point Measuring ground points

Wanted:

Position of several ground
points.

The levelling total station
measuring is normally

carried out during area levelling.

NA2/NAK2-2.0.0en

NA-36

A

1

Procedure:

1. Sequence of measurements
is the same as with area
levelling. However, beside the
height read also the staff
section L (see chapter
"Distance measuring") and
the Hz-angle.

2. Transfer measured value into
the map - points are
determined by position and
height.

18

Levelled stakeout

The stakeout is the counterpart
to the levelling total station

NA-37

measuring - map points are set

A

out in the field.

Procedure:

1. Set up instrument at a known
point, centre and level up.

2

2. Focus instrument and aim on
known orientation point.

3. Orient horizontal circle (Hz­direction).

4. Move staff to stakeout point
on the basis of known values
(distance and Hz-angle,
height) and stakeout point

Measuring

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Precise levelling

Project:

Height difference of very high
accuracy.

Use the GPM3 parallel
plate micrometer and

invar levelling staffs.

In sloping terrain, the

lower part of the staff
should not be used, as
refraction close to the ground
can cause errors.

In sunny weather an

umbrella should be used
to shelter the instrument to
ensure that the level is
protected from the glare of the
sun.

NA2/NAK2-2.0.0en

Procedure:

1. Sequence of measurements
is the same as with line
levelling. However, the best
observing length is approx.
25m.

2. When reading the staff, turn
the micrometer knob until a
graduation line is centred
between the wedge-shaped
hairs of the reticle.

3. Centimetres are read from
the staff and millimetres from
the micrometer scale.

4. Leica invar staffs have two
sets of graduations. These
are read alternatively
between foresight and
backsight. This provides two
independent results and
serves as a check.

19

NA-43

Example above:

Staff reading = 77 cm
GPM3 reading = 0.556 cm
Height = 77.556 cm

Measuring

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Checking and adjusting

Tripod

12

Connection of individual
elements must always be tight.

1. Tighten the Allen screws (2)
moderately (if available).

2. Tighten the articulated joints
on the tripod head (1) just
enough to keep the tripod
legs open when you lift it off
the ground.

NA2/NAK2-2.0.0en

Circular level

1.

NA-30

1. Level up instrument.

2. Turn instrument by 180°.

3. If bubble of level is outside
the circle then it should be
adjusted (see point 4).

20

∆

3.

2.

∆/2

NA-31

4. Correct the half error using
an adjusting pin and repeat
steps 2 and 3 until the bubble
of level is in the centre in any
telescope direction.

NA-32

Checking and adjusting

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Checking and adjusting of the line-of-sight

dddAB

A2 B2

A1

1

Checking (see figure):

1. Choose a flat terrain between
45 and 60 m ling and divide
into three equal sections d.

2. Set up a staff at points A & B.

3. Set up the level at point 1,
centre the bubble and press
the compensator button.

4. Readings A1 and B1 are
taken to the staffs.

5. Set up the level at point 2.

6. Readings A2 and B2 are taken
to the staffs.

7. Find nominal reading A2;
Reading A1 - B1 + B2

NA2/NAK2-2.0.0en

B1

2

8. Compare the nominal-/actual­reading for A2.

Parallel plate micrometer

When using the parallel plate
micrometer to perform precise
levelling, follow the same check
procedure using invar staffs and
micrometer reading. When
adjusting, the micrometer is set
to the correct value and the
adjusting screw is turned until
the horizontal hair is on the staff
graduation.

21

NA-44

NA-45

When the difference

nominal-/actual- reading is
more than 2 mm the line of sight
must be adjusted.

1. Screw off the protective cover.

2. Turn the adjusting screw until

the horizontal hair gives the
nominal reading A2 on staff A.
The last turn of the adjusting
screw should be clockwise.

3. Screw on the protective cover.

4. Repeat the checking

procedure.

Checking and adjusting

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Care and Storage

Transport

When transporting or

shipping the equipment
always use the original Leica
Geosystems packaging
(transport case and shipping
cardboard).

After a longer period of

storage or transport of
your product always check the
field adjustment parameters
indicated in this manual before
using the product.

NA2/NAK2-2.0.0en

In the field

When transporting the
equipment in the field, always
make sure that you

• either carry the product in its
original transport container,

22

NA-19

NA-39

• carry the tripod with its legs
splayed across your shoulder,
keeping the attached product
upright.

Care and Storage

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Inside vehicle Shipping

Storage

Never carry the product loose in
a road vehicle, as it can be
affected by shock and vibration.
Always carry the product in its
transport container and secure
it.

NA2/NAK2-2.0.0en

NA-20

NA-21

When transporting the product
by rail, air or sea, always use
the complete original Leica
Geosystems packaging,
transport container and
cardboard box, or its equivalent,
to protect against shock and
vibration.

23

°F °C

+158° +70°

+32° 0°

-40° -40°

NA-22

Respect the temperature

limits when storing the
equipment, particularly in summer
if the equipment is inside a
vehicle. Refer to "Technical Data"
for information about temperature
limits.

If the equipment is to be

stored for a long time,
remove the alkaline batteries from
the GEB63 battery box in order to
avoid the danger of leakage.

Care and Storage

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Storage, continued

Cleaning

If the instrument
becomes wet, leave it

unpacked. Wipe down, clean,

and dry the instrument (at not
more than 40 °C/ 104°F),
transport case, foam inserts,
and accessories. Pack up the
equipment only when it is
completely dry.

When using the instrument in
the field always close the
transport case.

NA2/NAK2-2.0.0en

NA-40

Objective, eyepiece:

• Blow dust off lenses and
prisms

• Never touch the glass with
your fingers

• Use only a clean, soft, lint­free cloth for cleaning. If
necessary, moisten the cloth
with water or pure alcohol.

24

NA-24

Do not use other liquids; these
may attack the polymer
components.

Care and Storage

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Safety Directions

Intended use of instrument

The following directions should
enable the person responsible
for the product, and the person
who actually uses the
equipment, to anticipate and
avoid operational hazards.

The person responsible for the
product directions and adhere to
them.

NA2/NAK2-2.0.0en

Permitted uses

The level is intended to the
following applications:

• Line and area levellings

• Height readings

• Precision levelling with
attachable parallel-plate
micrometer

• Optical distance measuring
with stadia readings

• Angle measurements and
staking out with horizontal
circle (only NAK2 model)

25

Adverse uses

• Use of the product without
instruction

• Use outside of the intended
limits

• Disabling safety systems

• Removal of hazard notices

• Opening the product using
tools, for example
screwdriver, unless this is
specifically permitted for
certain functions.

• Modification or conversion of
the product

• Use after misappropriation

• Use of products with
obviously recognizable
damages or defects

Safety Directions

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Adverse uses, contd.

Limits of use

• Use with accessories from
other manufacturers without
the prior explicit approval of
Leica Geosystems

• Aiming directly into the sun

• Inadequate safeguards at the
surveying site, for example
when measuring on roads

NA2/NAK2-2.0.0en

WARNING:

Adverse use can lead to

injury, malfunction and
damage.
It is the task of the person
responsible for the equipment to
inform the user about hazards
and how to counteract them.
The product is not to be
operated until the user has been
instructed on how to work with
it.

26

Environment:

Suitable for use in an
atmosphere appropriate for
permanent human habitation:
not suitable for use in aggressi­ve or explosive environments.
Use in rain is permissible for
limited periods (splash-water
proof).

DANGER:

Local safety authorities

and safety experts must
be contacted before working in
hazardous explosive areas, or in
close proximity to electrical
installations or similar situations
by the person in charge of the
product.

Safety Directions

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Responsibilities

Manufacturer of the product:

Leica Geosystems AG, CH­9435 Heerbrugg, hereinafter
referred to as Leica
Geosystems, is responsible for
supplying the product, including
the user manual and original
accessories, in a completely
safe condition.

NA2/NAK2-2.0.0en

Manufacturers of non Leica
Geosystems accessories:

The manufacturers of non Leica
Geosystems accessories for the
product are responsible for
developing, implementing and
communicating safety concepts
for their products, and are also
responsible for the effectiveness
of those safety concepts in
combination with the Leica
Geosystems product.

27

Person in charge of the product:

The person in charge of the product
has the following duties:

• To understand the safety

instructions on the product and
the instructions in the user
manual.

• To be familiar with local

regulations relating to safety and
accident prevention.

• To inform Leica Geosystems

immediately if the product and
the application becomes unsafe.

WARNING:

The person responsible

for the product must
ensure that it is used in
accordance with the instructions.
This person is also accountable
for the training and the
deployment of personnel who
use the product and for the
safety of the equipment in use.

Safety Directions

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Hazards of use

WARNING:

The absence of instruc-

tion, or the inadequate
imparting of instruction, can
lead to incorrect or adverse use,
and can give rise to accidents
with far-reaching human,
material, financial and environ­mental consequences.

Precautions:

All users must follow the safety
directions given by the manufac­turer and the directions of the
person responsible for the
product.

NA2/NAK2-2.0.0en

CAUTION:

Watch out for erroneous

measurement results if
the product has been dropped
or has been misused, modified,
stored for long periods or
transported.

Precautions:

Periodically carry out test
measurements and perform the
field adjustments indicated
in the user manual, particularly
after the product has been
subjected to abnormal use and
before and after important
measurements.

28

DANGER:

Because of the risk of

electrocution, it is very
dangerous to use poles and
extensions in the vicinity of
electrical installations such as
power cables or electrical
railways.

Precautions:

Keep at a safe distance from
electrical installations. If it is
essential to work in this
environment, first contact the
safety authorities responsible for
the electrical installations
and follow their instructions.

Safety Directions

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Hazards of use, continued

WARNING:

By surveying during a
thunderstorm you are at

risk from lightning.

Precautions:

Do not carry out field surveys
during thunderstorms.

NA2/NAK2-2.0.0en

CAUTION:

Be careful when pointing

the product towards the
sun, because the telescope
functions as a magnifying glass
and can injure your eyes and/or
cause damage inside the
product.

Precautions:

Do not point the product directly
at the sun.

29

WARNING:

Inadequate securing of

the surveying site can
lead to dangerous situations, for
example in traffic, on building
sites, and at industrial
installations.

Precautions:

Always ensure that the survey
site is adequately secured.
Adhere to the regulations
governing safety and accident
prevention and road traffic.

Safety Directions

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Hazards of use, continued

CAUTION:

If the accessories used

with the product are not
properly secured and the
product is subjected to mecha­nical shock, for example blows
or falling, the product may be
damaged or people may sustain
injury.

NA2/NAK2-2.0.0en

Precautions:

When setting-up the product,
make sure that the accessories,
for example tripod, staff, staff
brace are correctly adapted,
fitted, secured, and locked in
position.
Avoid subjecting the product to
mechanical stress.
Never position the product on
the tripod baseplate without
securely tightening the central
fixing screw. If the screw is
loosened always remove the
product immediately from the
tripod.

30

CAUTION:

When using a vertical

staff supported by one
brace there is always the danger
of falling, for example by wind
gusts and therefore danger of
damage to equipment and
danger of personal injuries.

Precautions:

Never leave a vertical staff
supported by a brace
unsupervised (person at the
staff).

Safety Directions

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Hazards of use, continued

WARNING:

If the product is
improperly disposed of,

the following can happen:

• If polymer parts are burnt,
poisonous gas are produced
which may impair health.

• If batteries are damaged or
are heated strongly, they can
explode and cause poisoning,
burning, corrosion or
environmental contamination.

• By disposing of the product
irresponsibly you may enable
unauthorized persons to use
it in contravention of the
regulations, exposing
themselves and third parties
to the risk of severe injury
and rendering the
environment liable to
contamination.

NA2/NAK2-2.0.0en

Precautions:

Dispose of the product
appropriately in accordance with
the regulations in force in your
country.
Always prevent access to the
product by unauthorized
personnel.

31

Safety Directions

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Accessories

GPM3 Parallel-Plate Micrometer

(Art. No. 356 121)

213

4

NA-46

1 Micrometer knob
2 Open sight
3 Housing of parallel plate
4 Knob for locking GPM3 in

position

For precise levelling the GPM3 is
fitted onto the NA2 telescope
objective and locked in position
with the knob (4).
By turning the micrometer knob
the parallel-sided glass plate is
tilted, thereby causing the line of
sight to be raised or lowered. The
range of displacement is 10mm.
On the scale, seen in the GPM3's
eyepiece, the amount of
displacement is read directly to

0.1mm and estimated to 0.01mm.

NA2/NAK2-2.0.0en

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32

Accessories

Accessories, continued

GOA2 Autocollimation
eyepiece

(Art. No. 199899)
Release the bayonet ring to
replace eyepieces. With the
autocollimation eyepiece the
NA2 can be used for alignment
purposes in the laboratory and
industry.

GFZ3 Diagonal eyepiece

(Art. No. 734514)
The diagonal eyepiece can be
fitted for observing from any
side when working in confined
spaces.

FOK73 Eyepiece 40x

(Art. No. 346475)
For precise levelling with the
parallel plate micrometer, the
FOK73 eyepiece giving 40x
magnification may be preferred.

NA2/NAK2-2.0.0en

GVO10 Auxiliary lens

(Art. No. 335958)
When short focussing distances
are required, the auxiliary lens
can be fitted to the objective.
Measuring range is 1.8 to 0.9m.

GEB60 Eyepiece lamp with
cable

(Art. No. 394785)
With the eyepiece lamp the NA2
can be used as a collimator for
horizontal sighting.

GEB62 Plug-in lamp with
cable

(Art. No. 394787)
This plug-in lamp can be used
with the GOA2 autocollimation
eyepiece.

33

GEB63 Battery box

(Art. No. 394792)
Power supply for autocollimation
eyepiece and eyepiece lamp.

Accessories

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Technical Data

Accuracy:

• Standard deviation for 1km
double levelling, depending on
staffs and procedure up to 0.7 mm

• With GPM3 parallel-plate
micrometer (optional) 0.3 mm

Telescope:

• Vertical image

• Magnification,

standard eyepiece 32 x
FOK 73 eyepiece 40 x

• Clear objective diameter 45 mm

• Field of view at 100 m 2.2 m

• Shortest target distance
from instrument axis 1.6 m

Distance measurement:

• Multiplication factor 100

• Additive constant 0

Compensator:

• Working range ± 30‘

• Setting accuracy (stand. dev.) 0.3“

NA2/NAK2-2.0.0en

Circular level:

• Sensitivity 8‘ / 2 mm

Glass circle of NAK2:

• Graduation 360º or 400 gon

• Graduation diameter 70 mm

• Graduation interval 1º or 1 gon

• Optical scale interval 10‘ or 10

• Reading by estimation to 1‘ or 1

Temperature range:

• Storage -40ºC to 70ºC

• Operating -20ºC to 50ºC

GPM3 parallel-plate micrometer:

(optional accessory)

• Range 10 mm

• Interval 0.1 mm

• Estimation 0.01 mm

34

(-40ºF to 158ºF)

(-4ºF to 122ºF)

Technical Data

c

c

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Index

Accident prevention ..................................... 29

A

Angle measuring .......................................... 15

Area levelling ............................................... 17

Booking ................................................. 16, 17

B

Bubble ................................................... 12, 20

Central fixing screw ..................................... 12

C

Centring ........................................................ 13

Circular level .................................. 12, 14, 20

Cleaning ....................................................... 24

Compensator ................................................. 9

Distance line ................................................ 15

D

Electrical installations .................................. 28

E

Environment ................................................. 26

Eyepiece ............................................... 13, 33

NA2/NAK2-2.0.0en

Focusing ............................................... 13, 33

F

Height difference ............................. 9, 16, 17

H

Horizontal circle ........................................... 15

Hz-angle ....................................................... 18

Hz-circle ....................................................... 15

Line levelling ................................................ 16

L

Line-of-sight ................................................. 21

Optical sight ................................................. 13

O

Packaging .................................................... 23

P

Plumb bob .................................................... 13

Plummet ....................................................... 13

Precise levelling ..................................... 19, 32

35

Index

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Index, continued

Rearrangement point ................................... 16

R

Reticule ................................................. 13, 14

Safe distance ............................................... 28

S

Sharp-focus ................................................. 14

Shipping ................................................ 22, 23

Stakeout ....................................................... 18

Storage .................................................. 22, 24

Storing .......................................................... 23

Target distances .......................................... 16

T

Total station measuring ............................... 18

Transport ...................................................... 22

Transport case ...................................... 22, 24

Tripod ........................................................... 20

NA2/NAK2-2.0.0en

Vibrations ..................................................... 14

V

Wet instrument ............................................ 24

W

36

Index

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Leica Geosystems AG, Heerbrugg,
Switzerland, has been certified as
being equipped with a quality system
which meets the International
Standards of Quality Management
and Quality Systems (ISO standard

9001) and Environmental

Management Systems (ISO standard

14001).

Total Quality Management­Our commitment to total customer
satisfaction.

Ask your local Leica Geosystems
agent for more information about
our TQM program.

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