Take a reading on each rod with the instrument (or mark each piece of strapping where the
crosshair is sighted). Note the
and record them. Next, move the instrument to another
point in line with the two level rods as shown in Fig. 3. Level the instrument and take readings on
the two level rods (or re-mark the two pieces of strapping with the new crosshair sightings). The
should be the same ( A - A'should equal B - B'). The
between A - A' and B -
B' is the instrument error at 200 feet.
Correction of instrument error should be performed by a competent repair technician.
The instrument should be rechecked periodically to assure continued accuracy.
FUNCTIONS
Display
DISPLAY
FUNCTION
V
V
0.0.0.0.0.0.0.
H
R
(See section 1.2.3, preference set up)
HR
Horizontal angle counterclockwise symbol
HL
Horizontal angle clockwise symbol
Battery strength symbol (See section 4, power)
Angular measurements are in gons
G
(See section 1.2.3, preference set up)
Vertical reading shown as percent of grade
%
(see section 1.2.3, preference set up)
DGTA-5
7