E-survey ESL2 Bedienungsanleitung

Automatic Level

ESL2

INSTRUCTION MANUAL

Contents

1. Equipment....................................................................................................5

2. Applications .................................................................................................5

3. Technical Data.............................................................................................. 6

4. Description...................................................................................................7

4.1 Instrument.......................................................................................... 8

4.2 Leveling Staffs.................................................................................... 9

4.3 Tripod...............................................................................................10

5. Instructions for Use ...................................................................................10

5.1 Unpacking and Setting Up................................................................10

5.2 Leveling Up.......................................................................................10

5.3 Focusing and Sighting ......................................................................11

5.4 Compensator Checking ....................................................................11

6. Measuring ..................................................................................................12

6.1 Normal Height Measurement ...........................................................13

6.2 Distance Measurement from Stadia Readings (fig.2) ......................15

6.3 Precise Height Measurement with ESM1 (fig.3)..................................16

7. Testing and Adjusting.................................................................................19

7.1 Tripod...............................................................................................19

7.2 Circular Level(fig.5) ..........................................................................19

7.3 Horizontality of the Line of Sight ....................................................21

8. Care and Transport ....................................................................................24

8.1 Transport .........................................................................................24

8.2 Storage ............................................................................................25

8.3 Cleaning and Drying .........................................................................26

1. Equipment

1.1 Standard Equipment

1x Set ELS2 Universal Automatic Level, with 360°/400g circle

1x Adjusting pin each container

1.2 Optional Accessories

ESM1 parallel plate Micrometer can be used with WILD NA2/NAK2 and

ESL2 Measuring range:10mm

Parallel Plate Micrometer ESM1

With glass reading scale Range Interval Estimation

10mm 0.1mm 0.01mm

2. Applications

Model ESL2 Automatic Level is adoptable for the second and third class

leveling, It is also used for general construction engineering and installation of

large size machines. The advantage of the automatic is that as soon as the

circular bubble is centered, the line of sight is horizontal for all pointings of

the telescope. Elimination of the traditional tubular level speeds up work and

improves accuracy.

3. Technical Data

ESL2 ESL2+ESM1

Standard deviation of 1KM

double run ±1.0mm ±0.5mm

Telescope

Image Erect

Magnification 32x

Clear objective aperture 45mm

Shortest focusing distance

1.6m

Multiplication factor 100

Additive constant 0

Compensator

Working range ±14′

Setting accuracy ≤0.3″

Circular level sensitivity 8′/ 2mm

Horizontal circle 360°(400g)

Minimum reading 1°(1g)

Weight 2.5 kg

4. Description

Fig.1 Automatic Level

1. Base plate 6. Telescope eyepiece

2. Footscrew 7. Press button

3. Horizontal drive, endless 8. Circular level

4. Telescope objective housing 9. Prism for viewing circular level

5.Optical sight 10. Focussing knob with cores/fine motion

ESL2

4.1 Instrument

The base plate (1) has a standard thread enabling the ESL2 tobeused on

any of our tripods which are sufficiently stable (and on any other tripod

having a 5/8″thread fixing screw). The rotatable upper partof the

instrument consists chiefly of the telescope with an optical mechanical

compensator. The compensating element is essentially a pendulum,

supported by four suspension tapes and carrying a prism. The rapes are ofa

special alloy to guarantee correct compensator functioning even at extreme

temperatures (-30℃to +50℃). Provided the circular bubble(8) (sensitivity 8′

per 2mm) has been set in its setting circle by turning thethree

footscrews(2). The line of sight will be automatically horizontal as the

pendulum will bewell within its working range of ±14′. The movement of

the pendulum is efficiently air damped.

The ESL2 is equipped with a press button(7) to check the functioning of the

compensator. When the button is pressed, before reading the staff, the

pendulum is given a slight tap and, as a result of the pendulum’s swing, the

staff image swings smoothly awayand then floats gently back to its original

position with respect to the horizontal cross hair. The observer is then

certain that the compensator is working and that the line of sight is

horizontal. The press button also verifies the leveling upofthe

ESL2’ because the staff image will not show the correct movement on

pressing the button if the circular bubble is long away from its central

position, but the movement will be quicker and shorter due to the

pendulum reading its stop.

The eyepiece(6) with dioptric scale is turned to focus the reticle cross hairs.

After turning the bayonet locking ring anticlockwise, the eyepiece can be

removed and replaced by an optional eyepiece.

The reticle haswedged-shaped hairs for precise leveling with the parallel

plate micrometer, and a single horizontal hair for normal leveling staffs. It

also has 1:100 stadia hairs(6.2).

The focusing knob(10)is turned to obtain a sharp image of the staff.It has

a coarse and fine motion. Rotation ofthe instrument is friction-braked.

Fine-pointing is by means ofthe endless horizontal drive screw(3). The

drive has knobs ateach side for use with either hand.

4.2 Leveling Staffs

As the telescope of the ESL2 gives an erect image, leveling staffs with erect

numbers should be used. It is emphasized that the accuracy of leveling

depends just as much on the staffs as on the level.

High quality staffs must be used.

4.3 Tripod

For normal leveling the model L tripod with telescopic legs is usually

preferred. For precise leveling and severe conditions e.g. strong wind the

model M tripod is recommended. As the fixing screw on all of our tripods

have the same thread however, any our tripods can be used. Each tripod

has a plastic cover for the tripod head.

5. Instructions for Use

5.1 Unpacking and Setting Up

When setting up the tripod. The legs must be trodden firmly into the ground.

The tripod head should be as horizontal as possible and height should be

such that the telescope eyepiece will be comfortably at the observer’s eye

level. With a telescopic leg tripod check that the clamps are tight. The

instrument is set on the tripod head.

5.2 Leveling Up

To level up the instrument turn the footscrews (2) until the circular level (8)

lies in the centre of its setting circle. The line of sight is then automatically

set by the compensator to horizontal. For adjustment of the circular level,

please refer 7.2.

5.3 Focusing and Sighting

The telescope is pointed towards a uniformly light surface. Or a sheet of

white paper and the telescope eyepiece (6) is turned until the reticle

cross-hairs appear sharp and absolutely black. The eyepiece diopters scale

reading now indicates the correct setting for the observer’s eye. By looking

alone the optical (or open) sight (5) and turning the instrument by hand the

telescope is pointed roughly at the Leveling staff. Turn the focusing knobs

(10), which have coarse and fine motion. Until the staff image appears

sharp and free from parallax with respect to the cross hairs, i.e. there

should be no apparent movement between the horizontal hair and a staff

graduation when the observe moves his eye slightly up and down. To bring

the vertical cross-hairs exactly on to the centre of the staff turn the

horizontal drive (3).

5.4 Compensator Checking

Before reading the staff, when the button (7) is pressed, the staff image

swings smoothly away and then floats gently back to its original position

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