Pentax ETH-310 - Manual (Page 36)

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5.3 Vertical angle measurement
Level the instrument, turn the power on and set
the vertical angle 0 point.
Sight the object A using the horizontal clamp and tangent screws as well
as the telescope clamp and tangent screws.
Read the displayed value ( ).
• The vertical angle mode can be changed to slope percent display
(V%) by pressing [V%] key.
Also, horizontal 0°(VH) and compass (Vc) can be set using special
key operation.
(Factory setting is Zenith 0°)
(Refer to 3.1 Setting of vertical angle)
Vertical angle (
θ) = 86 °24’ 40”
Press the [V/%] key to view the Vv and V%.
Vertical angle 0 point
Object
Horizontal angle