Brunton ECLIPSE 8099 Manual de usuario

BRUNTON ECLIPSE

INSTRUCTION MANUAL

MANUEL D'INSTRUCTIONS

Printed in U.S.A.

form 62-8099 rev 9951

A subsidiary of Silva Production, AB

ECLIPSE

8099

INSTRUCTION MANUAL

Section 1 – ORIENTATION (Brunton Eclipse 8099) Page(s): 1 - 3

Section 2 – MAGNETIC DECLINATION 4 - 6

Section 3 – 1° GRADUATED DIAL 6

Section 4 – FIELD BEARING (Forward & Reverse Sighting) 6 - 7

Section 5 – DIRECTION OF TRAVEL 7 - 8

Section 6 – TOPOGRAPHIC MAP 8

Section 7 – MAP BEARING (Map & Compass Alignment) 8 - 12

Section 8 – TRIANGULATION 12 - 14

Section 9 – BACK BEARING 14

Section 10 – COORDINATE POSITIONING (UTM & Lat./Lon.) 14 - 18

Section 11 – INCLINATION (Hinge, Card & Graduated Dial) 19 - 21

Section 12 – HEIGHT MEASUREMENT (Level & Sloping Ground) 22 - 23

Section 13 – ADDITIONAL INFORMATION 23

Section 14 – ECLIPSE 8099 SPECIFICATIONS 23

1 – Orientation: Brunton Eclipse 8099

The Eclipse 8099 compass is a sighting instrument which uses the Earth’s magnetic field to display

a bearing (direction) in degrees. The Eclipse 8099 also contains three clinometer scales to meas-

ure angles from horizontal (0°).

The orientation section provides a description of important Eclipse 8099 parts. A detailed

description of Eclipse 8099 operation is provided throughout the instruction manual.

1.1 Sight Cover (Fig 1)

The sight cover opens to three pre-measured angles – 45°, 90° and 120°. Use 45° for forward

mirror sighting and 120° for reverse mirror sighting.

1.2 Vial (Fig 1)

The vial is a clear fluid filled extrusion containing a needle disk with a red circled "N" (described

in 1.3), blue orienting circle (described in 1.9) and a green clinometer arrow (described in 1.10).

The fluid inside the vial stabilizes the needle disk and clinometer arrow.

1.3 Needle Disk – RED circled "N" (Fig 1)

The needle disk contains a permanently magnetized ferrous material which orients the red

circled "N" to magnetic north. Also printed on the needle disk are "E", "S" and "W", for quick

directional reference.

1.4 Rotating Azimuth Ring (Fig 1)

The rotating azimuth ring includes a graduated dial (described in section 1.7). The blue

orienting circle and the graduated dial rotate with the rotating azimuth ring.

1.5 Index Lens (Fig 1)

The bubble shaped index lens magnifies the graduated dial (described in 1.7). Also, notice the

green index line in the center of the index lens. Read bearing and inclination at this line.

1.6 Rubber Shoe (Fig 1)

The removable rubber shoe encloses and protects the Eclipse 8099 and a set of quick refer-

ence cards (described in 1.11). Also, the rubber shoe can be used as a pencil eraser for maps.

1.7 Graduated Dial (Fig 2)

The graduated dial is graduated 0° through 360° *, incremented by 1°. Read compass bearing

and inclination at the green index line in the index lens. Note the green and black scales for

forward and back bearing, respectively.

1.8 Viewing Lens (Fig 2)

Use the viewing lens to magnify small writing on a map.

*0° = 360° (one complete revolution)

1.9 Orienting Circle – BLUE (Fig 2)

Printed on the bottom of the vial, the adjustable blue orienting circle is used in bearing and

clinometer measurements as well as magnetic declination adjustments. Additionally, the blue

orienting line extending across the vial allows for precise bearing and clinometer measurments,

as well as map alignment.

1.10 Clinometer Arrow – GREEN (Fig 2)

Located inside the vial, the weighted green clinometer arrow points to the ground when the

Eclipse 8099 is positioned on its side. Use the green clinometer arrow in combination with the

blue orienting circle, to measure angle of inclination.

1.11 Quick Reference Information Cards (Fig 3)

The quick reference cards supply quick, valuable information on navigation, formulas and scales

for field use.

1.12 Magnetic Declination Scale (Fig 3)

Magnetic declination is the difference between true north and magnetic north, at a position. The

magnetic declination scale, located on the bottom of the azimuth ring, is used in combination

with the adjustable blue orienting circle to set the Eclipse 8099 for magnetic declination.

1.13 Clinometer Index Mark (Fig 3)

Use the clinometer index mark in combination with the green clinometer arrow and the blue

orienting circle to measure angles up or down from the horizon.

2 -- Magnetic Declination

The Earth is completely surrounded by a magnetic field, and an unobstructed magnetized object

will orient itself with magnetic north and south poles. Magnetic declination (or magnetic variation) is

the difference between true geographic north (north pole) and magnetic north (in northern Canada),

with respect to your position. It is important to note magnetic declination at your position, because

magnetic declination varies and fluctuate slowly at different rates, around the world. (Fig 4)

Contact Brunton for current information at (307) 856-6559, or e-mail us at [email protected].

Figure 4

The isogonic chart shows North America, only. Use an isogonic chart, or a current United States

Geological Survey (USGS), Bureau of Land Management (BLM), or another map to determine

magnetic declination at your position. Declination can be east, west or even 0°, from your current

position. At 0° declination, true north and magnetic north are aligned.

Example: If magnetic declination at your position is 15° east, then

magnetic north is 15° east of true geographic north – Figure 5 displays

true geographic north and magnetic north, as indicated in the legends

of USGS and BLM maps.

Most maps use true north as a reference. When adjustment for mag-

netic declination is complete, a bearing measurement will be with

respect to true north, same as the map.

2.1 Magnetic Declination Adjustment

1. Find the magnetic declination at your current position, from a map or chart.

2. Remove rubber shoe, and open both covers.

3. Position the Eclipse 8099 with bottom of clear base facing you. (Fig 6)

Figue 5

True North

Magnetic North

15oE

Your Position

Figure 6

4. Locate declination scale.

5. Grasp azimuth ring in one hand, and the vial in the other. (Fig 6)

6. Hold azimuth ring stationary, and rotate vial until the arrow on the blue orienting circle points

to the value of magnetic declination at your current position.

· Make sure declination is correct (east or west).

3 – 1 Degree Graduated Dial

The 1° graduated dial has two scales, a green and a black scale and both are incremented by 1°.

(Fig 7) The green scale is for forward sighting and the black scale is for reverse sighting. The

scale increments from 0° to 360°, where 0° & 360° are the same value, and both indicate north.

In addition, 90° indicates east, 180° is south and 270° is west.

4 – Field Bearing

There are two methods to sight a field bearing – forward mirror sighting

and reverse mirror sighting. Since there are two methods and two

scales, please follow instructions carefully for each method.

4.1 Forward Mirror Sighting

This is the most accurate method of sighting a field bearing.

1. Find and set the magnetic declination at your position.

· Refer to section 2.1, Magnetic Declination Adjustment, for help.

2. Open sight cover to 45°.

3. At eye-level, sight object through sight hole, and align sighting

lines and peep sight. (Fig 8) 6

Figure 7

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Figure 8

4. Rotate azimuth ring until reflection of blue orienting circle

outlines the red circled "N".

· Make sure base is level and sighting lines and peep

sight are aligned.

5. Position Eclipse 8099 close enough to read field bearing

in magnified index lens.

· Read bearing from green scale at the green index

line – 170°, Figure 9.

4.2 Reverse Mirror Sighting

Reverse mirror sighting is another method of sighting a

field bearing.

1. Find and set magnetic declination at your position.

2. Open sight cover to 120°.

3. Hold Eclipse 8099 at waist-level, with sight cover

pointing at you. (Fig 10)

4. Sight object in the mirror and align mirror line with the

reflection of the cover line.

5. Rotate azimuth ring until blue orienting circle

surrounds the red circled "N".

· Make sure mirror line and reflection of cover line are

aligned with sighted object.

6. Read field bearing from the black scale in the magnified

index lens – 170°, Figure 11.

5 – Direction Of Travel

When field bearing to a destination is already known, set

compass to the known field bearing, sight and travel to the

destination. The bearing you travel is known as the direction

of travel. The following example uses forward mirror sighting.

1. Set magnetic declination.

2. Open sight cover to 45°.

3. Rotate azimuth ring until compass is set to known field bearing, using green scale.

Figure 9

Figure 10

Figure 11

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