Setting Of The W-Correction - Horizon Fitness HTS-580 Series Operation Manual

Press F3 key turn on， press F4 key
turn off.
If the instrument is with dual axis compensator.
The operation is as below.
① Press the F1 key from the
MEAS. PARA. Seting menu to get
to the TILT SENSOR display.
②Press F3 or F4 key to turn on or
off X axis or Y axis compensator.

11.2.2 Setting of the W-Correction

The instrument will automatically correct the influence of atmosphere refraction and
earth curvature when measuring Horizontal Distance and Elevation Difference:
Corrected Horizontal Distance:
D=S*[cosα+sinα* S*cosα (K-2)/2Re]
Corrected Elevation Difference:
216
F3
F4
F1
F3
F4