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21. CHECKS AND ADJUSTMENTS
PROCEDURE Check 2: Vertical and horizontal reticle line positions
• Perform check in weak sunlight and no scintillation.
• "Tilt crn" should be se to "Yes (H,V)" and "Coll.crn" to "Yes" in <Obs. condition> while performing checks.
"19.1 Observation Conditions - Angle/Tilt"
1. Carefully level the instrument.
2. Install a target at a point about 100 m in the
horizontal direction from the instrument.
3. While the Observation mode screen is displayed
and the telescope is in Face 1, sight the center of
the target correctly 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 2, sight the center
of the target correctly 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, make sure that checking and
adjusting of "21.2 Tilt Sensor" and
"21.4 Collimation" are completed.
If the results remain the same, have our service
representative perform the adjustment.