A. Needle
The needle is induction damped, which allows the needle to seek magnetic
north and come to a complete rest in a minium amount of time, without
accuracy degradation.
B. Graduated Circle
In combination with the needle, the 1° graduated circle
allows accurate 1/2° azimuth readings on both the Degree ( 0°
through 360°) and Quadrant (0° through 90°) graduated
circles.
C. Long Level
The long level for inclination measurment. Adjust the long
level using the vernier adjustment (M).
D. Round Level
Use the round level to level the pocket transit for azimuth
measurement.
E. Zero Pin
The zero pin is the pointer used for magnetic declination adjustment.
If no adjustment is necessary, the pin should point at 0°.
F. Vernier
The adjustable vernier is used in inclination measurments
G. Large Sight with Peep Sight
The large sight and the attached peep sight are used for precise
azimuth measurement.
H. Small Sight
Attached to the cover, the small sight is used for precise bearing and
inclination sighting.
I. Mirror
Located on the inside cover, the mirror and mirror center line
are used for accurate azimuth measurements, when using the transit as
a prismatic compass.
J. Circle Adjusting Screw
With a screwdiver, rotate the graduated circle by turning the
circle adjusting screw.
K. Ball and Socket Tripod Mount
The slots on both sides of the body are for mounting to an
optional Brunton tripod.
L. Alidade Mount
The circular extension with slots, located on the bottom of
the body, is for the attachment of an optional Brunton alidade (protractor).
Only the COM-Pro models have this feature.
M. Vernier Adjustment
Use the vernier adjustment to adjust the vernier and long level
for inclination measurments.
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