23
D=S×[cosα+sinα×S×cosα(K-2) / 2Re]
Corrected Elevation :
H=S×[sinα+cosα×S×cosα(1-K) / 2Re]
If the Atmospheric Refraction and the earth curvature are
not corrected , the formula for calculating horizontal distance
and elevation are as followed:
D=S×cosα
H=S×sinα
In the formula:
K=0.14----------- Atmospheric refraction coefficient (can be
selected according to actual)
Re=6370 km---Radius of the earth curvature.
α-----------------The vertical angle (counted from the
horizon)
S-------------------Slope distance
Alternative values for K are 0, 0.14, 0.2.
3.8 Set up the minimum reading of the angle
The operation on the instrument follows”MENU→5.
Options→6. Mini readout (Angle)”
3.9 Setup of Automatic Shutdown
See reference in 9.Operating Menu.
The setup of automatic shutdown on the instrument follows
“MENU→5. Options→9. Auto shut down. Opts displayed are as
followed.
You may choose „Never‟ to cancel the auto shutdown.
When choosing 5, 10, 20 minutes opts, the instrument will shut
down automatically if there is no key pressed. Use the „▲‟or
„▼‟keys to move indicator „>‟ up and down to the opt wanted.
Press soft key „Enter‟ or „ENT‟ to save the setting. Pressing ESC
will result in no changes of settings.
Saving power option
>Never
5minutes
10minutes
20minutes
Enter