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Level N6 from Theis

Baunivellier     level front
Baunivellier/Seite    left side
Baunivellier/Seite2  right side        
manufacture: THEIS                          

technical facts: N6

-telescope magnification: 25x 
-telescope length: 160 mm
-free lens diameter : 35 mm
-outletpupil diameter: 1,2 mm
-shortest focusing distance: 1,3 m
-estimate of the milimetre except : 100 m
-estimate of the centimetre except: 250 m
-distance lines: 1:100/C=0

accuracy for 2 mm bubble movement
-circular level: 15´
-telescope level: 60´´

weight (kg)
-instrument: 1,2
-protection box: 0,8
-tripod: 4,5

north German construction level

This kind of construction connects the telescope carrier with the telesope. If you want to level the instrument, use the leveling screws to move the bubble into the middle. If the instrument is in the right postion, the telescope axis makes a horizontal rotation. This device is qualifield for area leveling in plane areas (->'' north German construction level'').You can read a lot of sideviews from the standpiont of an instrument without releveling the level.

abbreviations for the section drawing:

F        = leveling screw
Li       = tube vial
S        = direction tangent
D       = circular vial
L--L  = axis of level
Z--Z  = telescope axis
V--V = vertical axis

                Schnittzeichnung norddeutsches Nivellier




explanation of the reading

distance measurements:

For distance measurement the line plate of the levels have a distance lines.
The segmentof the rod between the distance lines is multiplied with 100 and equals the distance to the rod.
in other words:
The centimeters between the distance lines of the segment rod represent the distance in meters.

measurement of an angle:

1. hang the plumb into the hook
2. centre the instrument above the starting point.
 Aim at the target and bring it with the vertical line of the cross-hair in marking.
The horizontal circle is turnable and becomes sitting exactly at zero. At the next angle measuring, the pitch circle isn't allowed to change.
3. aim the next measuring point and read the angle value at the horizontal circle.

                                         the writers: Susann Scholz  & Annegret Völker
                                                                                     VT02     12.06.03