User's Manual

STONEX R2 PLUS
117
5. Rotate the instrument 180°/200gon. Loosen the
horizontal clamp and turn the instrument 180 °
/200gon while referring to the displayed horizontal
angle, then re-tighten the clamp. Wait a few seconds
for the display to stabilize, then read the automatically
compensated angles X2 and Y2.
Calculate the following offset values (tilt zero point error):
Xoffset= (X1+X2)/2
Yoffset= (Y1+Y2)/2
When the offset value falls within the range ±20″, adjustment is not necessary. If one
of the offset values (Xoffset, Yoffset) exceeds ±20″, adjust the value as follows.
Ⅱ. Adjustment
6. Press F3: [
OK] to set the horizontal angle to 0°,
“Take F2” is displayed.
7. Rotate the top of instrument 180°/200gon. Wait a
few seconds for the display to stabilize, then press F3:
[
OK].
8. If both correction constant are in the range, press F3:
[
YES] to renew the correction angle, or press F4: [NO]
to give up this adjustment,
26.10 Vertical Index Error
The deviation between vertical circle zero position and horizontal direction is vertical
index (i), it is necessary to concern this error when measure vertical angle. The instrument
program applied a formula to correct this error.
Warning: Before starting this operation, be sure to read this manual carefully, otherwise it
may cause data faulty.
Because of the close relationship between vertical index and compensator zero position, it
is necessary to check and adjust compensator zero position before adjusting vertical circle,
Tilt offset
X -0.0008gon
Y 0.0012gon
Take F1 II
0OK0
X Old 0.0020gon
Y Old 0.0022gon
X New 0.0006gon
Y New -0.0004gon
Set ?
YES NO0
Tilt offset
X -0.0008gon
Y 0.0012gon
Take F2 II
0OK0