Instruction manual

135
22. CHECKS AND ADJUSTMENTS
2. Install a target at a point about 100m in the
horizontal direction from the OS.
3. While the Observation mode screen is displayed
and the telescope is in face left, sight the center
of the target and read out the horizontal angle A1
and the vertical angle B1.
Example:
Horizontal angle A1 = 18° 34' 00"
Vertical angle B1 = 90° 30' 20"
4. While the telescope is in face right, sight the
center of the target and read out the horizontal
angle A2 and the vertical angle B2.
Example:
Horizontal angle A2 = 198° 34' 20"
Vertical angle B2 = 269° 30' 00"
5. Do the calculations: A2-A1 and B2+B1
If A2-A1 is within 180°±20″and B2+B1 is within
360°±20″, adjustment is unnecessary.
Example:A2-A1 (Horizontal angle)
=198° 34' 20"- 18° 34' 00"
=180° 00' 20"
B2+B1 (Vertical angle)
=269° 30' 00" + 90° 30' 20"
=360° 00' 20"
If the difference is large even after repeating the
check 2 or 3 times, have our service
representative perform the adjustment.