MEASURING HEIGHT
1. Distance yourself from the object to be measured at a
easily calculated space like 10 meters.
2. Hold OmniSlope vertically close to one of your eyes.
Because of the optical illusion, the index line will appear
to stand from the housing over the object.
3. Sight with both eyes to the top of the object. You can
focus the lens on dierent scales by turning the eyepiece
4. Read the angle/height at the index line
5. Remember to add the angle/height below the horizontal
line to the first reading in order to obtain correct height
of the object. For example 15% (see figure 2).
6. In the example shown in figure 2, the correct height of
the object would be 70%+15%=85% x 10 meters = 8.5
meters tall.
7. If you are standing below the object being measured,
please refer to the right example in figure 2.
8. Please note that when using the 66 foot forestry chain
scale, you can read out the correct height directly from
the scale without calculations.
FIGURE 2
DIRECT READING OF ANGLE
The top scale of side window with lubber line can be used by
placing the instruments long side along the inclined plane to be
measured. Read the slope angle direct from the lubber line. Use
this method when sighting measurements are impossible
because of lack of space, although sighting measurements are
always most accurate. (fig 3)