Product Manual

Table Of Contents
57
The measured distance (Hm) is corrected for the slope of the
measurement to obtain a vertical measurement to the bottom
notch height mark (Hc). The constant from the bottom notch
height mark to the true height mark (0.158 m/0.518 ft.) is added
to the Hc to obtain the vertical instrument height from the
ground mark to the trunnion axis (Ih). For more information,
refer to the field software documentation.
Alternatively, to obtain an accurate measurement to the true
height mark (Ih), you can manually measure the slope distance
from the ground to the bottom notch height mark (Hm). To
0.158m
Hm
Hc
Ih
(0.518ft)