Nikon NPL-322, Instruction Manual

Page: 158 / 197

6 Checking and Adjustment
144 Total Station NPL-322 Instruction Manual
5. Read the vertical angle from the VA1 field in the Basic Measurement Screen
(BMS).
6. Rotate the instrument 180° and flip the telescope to the Face-2 position.
7. Read the vertical angle from the VA2 field.
8. Add the two vertical angles together, VA1 + VA2.
–
No adjustment is required if the zero reference for vertical angles (VA
zero setting) is set to Zenith, and VA1 + VA2 equals 360°.
–
No adjustment is required if the zero reference for vertical angles (VA
zero setting) is set to Horizon, and VA1 + VA2 is either 180° or 540°.
–
An adjustment is required if VA1 + VA2 is not one of the values listed
above.
Note – The difference between the vertical angle reading the relevant angle (either
360° for Zenith, or 180° or 540° for Horizon) is called the altitude constant .
Adjusting
To enter the calibration screen, press
[MENU]
and
[7]
.
1. The NPL-322 has vertical axis adjustment only.
Take an F1 measurement to a target on the
horizon. Press
[ENT]
.
The vertical angle is shown in the
V0 dir= Horiz setting.
When you have taken the measurement, the
message on the bottom line changes from
DO
NOT TOUCH!
to
Turn to F2
.
2. Take an F2 measurement to the same target.
Press
[ENT]
.
VA1 Face-1 vertical angle (tilt-off value)
HA1 Face-1 horizontal angle (tilt-off value)
Tilt Face-1 Y axis tilt value
VA2 Face-2 vertical angle (tilt-off value)
HA2 Face-2 horizontal angle (tilt-off value)
Tilt Face-2 Y axis tilt value