Sokkia SRX1 Operator's Manual page 126

21. CHANGING THE SETTINGS
Items set and options (*: Factory setting)
Distance mode:
Tilt crn (tilt correction):
Tilt error:
Coll.crn. (collimation correction):
C and r crn.:
V manual:
V.obs (vertical angle display method):
Coordinates:
Ang.reso. (Angle resolution):
Dist.reso. (Distance resolution):
ppm setting:

• When "V manual" is set to "No" the horizontal angle will be automatically set to 0.

Setting V manual to "Yes":
Right Measurement"

Automatic tilt angle compensation mechanism
The vertical and horizontal angles are automatically compensated for small tilt errors using the
2-axis tilt sensor.
• Read the automatically compensated angles when the display has stabilized.
• The horizontal angle error (vertical axis error) fluctuates according to the vertical axis, so when the
instrument is not completely leveled, changing the vertical angle by rotating the telescope will cause
the displayed horizontal angle value to change.
• Compensated horizontal angle = Measured horizontal angle + Tilt in angle / tan (Vertical angle)
• When the telescope is directed close to the zenith or nadir angle, tilt compensation is not applied to
the horizontal angle.

Collimation correction
The SRX has a collimation correction function that automatically corrects horizontal angle errors
caused by horizontal axis and leveling axis errors.

V mode (vertical angle display method)
Zenith
118
S.Dist (slope distance)*, H.dist (horizontal distance), V.dist
(height difference)
Yes (H,V)*, Yes (V), No
No action*/Go to Tilt screen
No*, Yes
No*, K=0.142, K=0.20
Yes, No*
Zenith*, Horiz., Horiz ±90°
N-E-Z*, E-N-Z
SRX1/SRX2: 0.5"1"*
SRX3/SRX5: 1"*, 5"
SRX1/SRX2: 0.1mm, 1mm*
SRX3/SRX5: 1mm*
Press, Temp.*, +Humidity
"30.1 Manually Indexing the Vertical Circle by Face Left, Face
Horiz
Horiz 90°