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8. CHECK AND ADJUSTING
56
6If the difference between each set of marks is less than ±5 mm (±7/32 of an inch), no error
exists.
If the difference between [wall A]-side and [wall B]-side exceeds ±5 mm (±7/32 of an inch),
contact your dealer or Topcon.
Grade Setting Error
Perform the following check only after completing “Horizontal Rotation Grade Error” and
“Horizontal Rotation Cone Error”.
• Checking
1Setup the X- side facing the staff as shown in the figure.
Securely position Nail 1 and Nail 2 exactly 30m apart.
Staff
LS-80L
Nail 1 Nail 2
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