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Owner's Purchase Record
Model _______________________________________________________
Date of Purchase ______________________________________________
Dealer Purchased From: _________________________________________
_____________________________________________________________
Serial #:
Copyright BRUNTON, 2001
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Printed in U.S.A.
form 11-GEO rev. 0109
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GEO TRANSIT
OPERATOR'S MANUAL
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Summary of Contents for Brunton GeoTransit
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Page 1: Table Of Contents
Owner’s Purchase Record Model _______________________________________________________ Date of Purchase ______________________________________________ Dealer Purchased From: _________________________________________ _____________________________________________________________ Serial #: Copyright BRUNTON, 2001 1 – Orientation 2 – Magnetic Declination Azimuth Measurement 3 – Inclination & Percent Grade Measurement 4 -- Strike & Dip Measurement 5 –... -
Page 2: Orientation
Congratulations on your purchase of the finest pocket transit instrument in the world. The Brunton GEO Transit is not just a compass. It combines a surveyor’s compass, pris- matic compass, two inclinometers, hand level and a plumb into a single instrument. - Page 3 1.11 Ball & Socket Tripod Mount (Fig 3) Use the slots on both sides of the body for mounting the GEO to the optional Brunton ball & socket mount, which in turn attaches to an optional Brunton tripod, or monopod.
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Page 4: Magnetic Declination
Figure 5 With the small sight toward the object, read azimuth directly where the south end of the nee- dle points (“S” tip). (Fig 6) Figure 6 “S” Tip See section 4 for detailed explanation of sighting an azimuth. 2 -- Magnetic Declination The Earth is completely surrounded by a magnetic field, and an unobstructed magnetized object will orient itself with the earth’s magnetic north and south poles. -
Page 5: Azimuth Measurement
3.2 Azimuth Using a Tripod or Monopod For highest accuracy, mount the GEO transit on a Brunton non-magnetic tripod using the Brunton ball and socket head. 1. Adjust GEO transit for magnetic declination. - Page 6 8. Read azimuth where the "N" end of the needle points at graduated circle. (Fig 13) 3.3 Azimuth Measurement Waist-Level This method is often used when object is above or below the observer. 3.3.a Using "N" End of Needle Use this method when the object lies as much as 45° above, or 15°...
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Page 7: Inclination & Percent Grade Measurement
4 -- Inclination & Percent Grade Measurement The Brunton GEO Transit is capable of measuring vertical angles with an accuracy better than 1°, with readings to 10 minutes. Also, it displays percent grade, without calculation. The bottom scale is incremented from 0° to 90°... -
Page 8: Strike & Dip Measurement
4.2.a Height Measurement Using Vertical Angles 1. Sight inclination, as described in section 4.2. 2. Apply height calculation as shown in figure 24A or 24B. Height Measurement Above Object Base Figure 24A Note: Do not calculate tangent of an angle by adding tangents of two smaller angles. Example: Tan(60°) ≠... -
Page 9: Trend & Plunge Measurement
Figure 29 Figure 30 2. Open both the cover and large sight until they extend in a straight line. 3. Measure plunge using a Brunton non- magnetic tripod, or by holding the transit in your hand. (Fig. 30) -
Page 10: Additional Measurements
7.1 Map Azimuth It is possible to read a map azimuth from your position to a destination. Orient your map to true north, then determine a map azimuth by using the GEO transit. 1. On a USGS topographic map, place a “point” at a starting position and an “X”... -
Page 11: Prospecting
“stake a claim”. It would be necessary to construct a map of your claim, and tie (locate) your claim relative to some known position. Your Brunton GEO transit is ideally suited for this job, since it is a modification of the same instrument used by geologists, mining engineers for prospecting and mapping around the world, since 1896. - Page 12 location marker. The marker must be a rock pile 4 feet in diameter and 4 feet high, or a steel post 3 inches in diameter and 5 feet high. The description must also include the sec tion, township and range. The map need not be perfect, but “in accordance with the locator’s abilities.”...
- Page 13 set in concrete. The brass is marked with let- ters and figures that give the section, township and range. It is marked so that it must be read while standing on the south side of the monu- ment. The south side of the monument is marked with the date of the monument.
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Page 14: Reference Material
1 centimeter = 10 millimeters 1 centimeter = 0.01 meters Balancing - Brunton GEO transits must be balanced for use in specific regions of the world. 1 centimeter = 0.394 inches If using the GEO outside North America, the GEO’s needle may need to be balanced. Call 1 meter = 100 centimeters Brunton at (307) 856-6559 for details. - Page 16 GEO Transit Warranty Registration (Brunton must receive registration for warranty to go into effect) Detach and return to: Brunton, 620 East Monroe Avenue, Riverton, WY 82501-4997 Name: _________________________________________________________________ Address: _______________________________________________________________ City: _______________________________ State: __________ Zip: ______________ Phone: _________________________________________________________________ E-mail: _________________________________________________________________...
- Page 17 Any repair to the unit must be done by a Brunton authorized dealer or the unconditional war- ranty is void. The owner will pay for the freight to Brunton when repair is needed. Brunton will pay for the return freight at standard ground costs. If expedited shipping is requested, it will be at the expense of the owner.