8. Check and Adjusting
52
6 If the difference between each set of marks is less than ±5 mm (±7/32 of an inch), no error
exists.
G
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 Calibration” and “Horizontal
Rotation Cone Error”.
• Checking
1 Setup the X- side facing the staff as shown in the figure.
Securely position Nail 1 and Nail 2 exactly 30m apart.
Staff
ÌÓ¸°Ì
Nail 1
Nail 2
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