6
Checking and Adjustment
172
Pulse Laser Station NPL-302 Series Instruction Manual
Zero Point Errors of Vertical Scale and Horizontal
Angle Corrections
6.1
Checking
61.1
1.
Set up the instrument on the tripod.
2.
Follow the leveling procedures described in Leveling, page 16.
3.
Flip the telescope to the Face-1 position.
4.
Sight a target that is within 45° of the horizontal plane.
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
60.1
To enter the calibration screen, press
[MENU]
and
[7]
.
1.
The NPL-362/352 has two-axis level
compensation. Take an F1 measurement to a
target on the horizon. Press
[ENT]
.
The vertical angle is shown in the
V0 dir= Horiz setting.
VA1
Face-1 vertical angle (tilt-off value)
HA1
Face-1 horizontal angle (tilt-off value)
Summary of Contents for NPL-302 Series
Page 4: ......
Page 5: ...Safety 1 In this chapter Q Introduction Q Laser Safety Q Warnings and Cautions ...
Page 12: ...Safety xii Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 28: ...1 Introduction 8 Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 46: ...2 Preparation 26 Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 82: ...3 Getting Started 62 Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 188: ...5 Menu Key 168 Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 196: ...6 Checking and Adjustment 176 Pulse Laser Station NPL 302 Series Instruction Manual ...
Page 208: ...8 System Diagrams 188 Pulse Laser Station NPL 302 Series Instruction Manual ...