17. CHECK AND ADJUSTMENT
17-3
Vertical direction confirmation (Do not move Horizontal direction).
13
Carry out as Horizontal direction confirmation.
Compare the reading Vertical angle value and calculated value.
If the difference is within 1' 30", no problem for use.
[Example]
90 12' 30"
90 04' 30"
Average
90 08' 30"
Difference 20"
Reading to
prism center
90 08' 50"
If the difference is more than mentioned value, contact with your Topcon dealer or Topcon.
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