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VERTICAL CIRCLE

VERTICAL CIRCLE. REDUCED. REDUCED. TARGET. POINT. FACE LEFT. FACE RIGHT. MEAN. HEIGHT. FACE LEFT. FACE RIGHT. A. --. 88. 47. 24. B. --. --. C. DIAGRAM. REMARKS. Example. SURVEY TITLE. B. C. 06 - 11 - 97. A. DATE. ---. THEODOLITE HEIGHT. N (approx).

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VERTICAL CIRCLE

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  1. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- 88 47 24 B -- -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  2. 0 360 A 270 90 180 FACE LEFT

  3. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- 88 47 24 B -- -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  4. 360 0 A 270 90 180 FACE LEFT

  5. 0 360 90 270 180 FACE RIGHT

  6. 0 360 A 90 270 180 FACE RIGHT

  7. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- 88 47 24 271 13 48 01 12 B -- -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  8. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT 88 47 24 271 13 48 01 12 36 01 12 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER A -- B -- -- C

  9. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- 88 47 24 271 13 48 01 12 36 01 13 48 01 12 B -- -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  10. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  11. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- 87 22 36 -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  12. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- 87 22 36 272 38 30 01 06 -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  13. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- 87 22 36 272 38 30 02 37 24 01 06 -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  14. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- 87 22 36 272 38 30 02 37 24 02 38 30 01 06 -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  15. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  16. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  17. 0 360 90 270 C 180 FACE LEFT

  18. 360 0 270 90 180 FACE RIGHT

  19. 0 360 270 90 C 180 FACE RIGHT

  20. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 266 40 12 01 00 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  21. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 266 40 12 03 19 48 01 00 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  22. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 266 40 12 03 19 48 03 20 48 01 00 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  23. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 266 40 12 03 19 48 03 20 48 - 03 20 18 01 00 DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER

  24. VERTICAL CIRCLE REDUCED REDUCED TARGET POINT FACE LEFT FACE RIGHT MEAN HEIGHT FACE LEFT FACE RIGHT DIAGRAM REMARKS Example SURVEY TITLE B C 06 - 11 - 97 A DATE --- THEODOLITE HEIGHT N (approx) T3051 THEODOLITE NUMBER P MAR OBSERVER DWB BOOKER A -- + 01 88 47 24 271 13 48 01 12 36 01 13 48 13 12 01 12 B -- + 02 87 22 36 272 38 30 02 37 24 02 38 30 37 57 01 06 -- C 93 19 48 266 40 12 03 19 48 03 20 48 - 03 20 18 01 00

  25. 6 There are possible instrument errors. 1) Plate Bubble Error. Checked every time the theodolite is set up by checking bubble drift in positions c) and d) and then "Freezing the Bubble". 2) Non - Vertical Cross Hairs . Move telescope up and down while sighting a well defined distant point. 3) Horizontal Collimation Error. Sight a well defined point and read horizontal circle on F/L and F/R. The difference in the Minutes and Seconds should be < 40" (Wimpey) 4) Trunnion Axis Dislevelment. - Spire Test. Sight a Spire or other elevated point then lower telescope onto a tape or staff about 40m to 50m away. The difference between F/L and F/R should be < 5mm for most engineering applications. 5) Vertical Collimation Error. Sight a well defined point and read vertical circle on F/L and F/R. The difference in the Minutes and Seconds should be < 40" (Wimpey). 6) Optical Plumb Error . Check optical plumb alignment in two positions (180 different.) 0 Theodolite - Instrument Checks Not acceptable for PLUMBING PURPOSES e.g. Verticality of columns.

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